Axiom.Graphics.TextureUnitState.SetColorOperationEx C# (CSharp) Method

SetColorOperationEx() public method

For setting advanced blending options.
This is an extended version of the TextureUnitState.SetColorOperation method which allows extremely detailed control over the blending applied between this and earlier layers. See the IMPORTANT note below about the issues between mulitpass and multitexturing that using this method can create.

Texture color operations determine how the final color of the surface appears when rendered. Texture units are used to combine color values from various sources (ie. the diffuse color of the surface from lighting calculations, combined with the color of the texture). This method allows you to specify the 'operation' to be used, ie. the calculation such as adds or multiplies, and which values to use as arguments, such as a fixed value or a value from a previous calculation.

The defaults for each layer are:

  • op = Modulate
  • source1 = Texture
  • source2 = Current
ie. each layer takes the color results of the previous layer, and multiplies them with the new texture being applied. Bear in mind that colors are RGB values from 0.0 - 1.0 so multiplying them together will result in values in the same range, 'tinted' by the multiply. Note however that a straight multiply normally has the effect of darkening the textures - for this reason there are brightening operations like ModulateX2. See the LayerBlendOperation and LayerBlendSource enumerated types for full details.

Because of the limitations on some underlying APIs (Direct3D included) the Texture argument can only be used as the first argument, not the second.

The final 3 parameters are only required if you decide to pass values manually into the operation, i.e. you want one or more of the inputs to the color calculation to come from a fixed value that you supply. Hence you only need to fill these in if you supply Manual to the corresponding source, or use the BlendManual operation.

The engine tries to use multitexturing hardware to blend texture layers together. However, if it runs out of texturing units (e.g. 2 of a GeForce2, 4 on a GeForce3) it has to fall back on multipass rendering, i.e. rendering the same object multiple times with different textures. This is both less efficient and there is a smaller range of blending operations which can be performed. For this reason, if you use this method you MUST also call TextureUnitState.SetColorOpMultipassFallback to specify which effect you want to fall back on if sufficient hardware is not available.

If you wish to avoid having to do this, use the simpler TextureUnitState.SetColorOperation method which allows less flexible blending options but sets up the multipass fallback automatically, since it only allows operations which have direct multipass equivalents.

This has no effect in the programmable pipeline.

public SetColorOperationEx ( LayerBlendOperationEx operation, LayerBlendSource source1, LayerBlendSource source2, ColorEx arg1, ColorEx arg2, float blendFactor ) : void
operation LayerBlendOperationEx The operation to be used, e.g. modulate (multiply), add, subtract.
source1 LayerBlendSource The source of the first color to the operation e.g. texture color.
source2 LayerBlendSource The source of the second color to the operation e.g. current surface color.
arg1 Axiom.Core.ColorEx Manually supplied color value (only required if source1 = Manual).
arg2 Axiom.Core.ColorEx Manually supplied color value (only required if source2 = Manual)
blendFactor float /// Manually supplied 'blend' value - only required for operations /// which require manual blend e.g. LayerBlendOperationEx.BlendManual ///
return void
		public void SetColorOperationEx( LayerBlendOperationEx operation, LayerBlendSource source1, LayerBlendSource source2, ColorEx arg1, ColorEx arg2, float blendFactor )
		{
			colorBlendMode.operation = operation;
			colorBlendMode.source1 = source1;
			colorBlendMode.source2 = source2;
			colorBlendMode.colorArg1 = arg1;
			colorBlendMode.colorArg2 = arg2;
			colorBlendMode.blendFactor = blendFactor;
		}

Same methods

TextureUnitState::SetColorOperationEx ( LayerBlendOperationEx operation ) : void
TextureUnitState::SetColorOperationEx ( LayerBlendOperationEx operation, LayerBlendSource source1, LayerBlendSource source2 ) : void
TextureUnitState::SetColorOperationEx ( LayerBlendOperationEx operation, LayerBlendSource source1, LayerBlendSource source2, ColorEx arg1 ) : void

Usage Example

			/// <see cref="Translator.Translate"/>
			public override void Translate( ScriptCompiler compiler, AbstractNode node )
			{
				ObjectAbstractNode obj = (ObjectAbstractNode)node;

				Pass pass = (Pass)obj.Parent.Context;
				_textureunit = pass.CreateTextureUnitState();
				obj.Context = _textureunit;

				// Get the name of the technique
				if ( !string.IsNullOrEmpty( obj.Name ) )
					_textureunit.Name = obj.Name;

				// Set the properties for the material
				foreach ( AbstractNode i in obj.Children )
				{
					if ( i is PropertyAbstractNode )
					{
						PropertyAbstractNode prop = (PropertyAbstractNode)i;
						switch ( (Keywords)prop.Id )
						{
							#region ID_TEXTURE_ALIAS
							case Keywords.ID_TEXTURE_ALIAS:
								if ( prop.Values.Count == 0 )
								{
									compiler.AddError( CompileErrorCode.StringExpected, prop.File, prop.Line );
								}
								else if ( prop.Values.Count > 1 )
								{
									compiler.AddError( CompileErrorCode.FewerParametersExpected, prop.File, prop.Line,
										"texture_alias must have at most 1 argument" );
								}
								else
								{
									string val;
									if ( getString( prop.Values[ 0 ], out val ) )
										_textureunit.TextureNameAlias = val;
									else
										compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
											prop.Values[ 0 ].Value + " is not a valid texture alias" );
								}
								break;
							#endregion ID_TEXTURE_ALIAS

							#region ID_TEXTURE
							case Keywords.ID_TEXTURE:
								if ( prop.Values.Count == 0 )
								{
									compiler.AddError( CompileErrorCode.StringExpected, prop.File, prop.Line );
								}
								else if ( prop.Values.Count > 5 )
								{
									compiler.AddError( CompileErrorCode.FewerParametersExpected, prop.File, prop.Line,
										"texture must have at most 5 arguments" );
								}
								else
								{
									AbstractNode j = getNodeAt( prop.Values, 0 );
									int index = 1;
									string val;
									if ( getString( j, out val ) )
									{
										TextureType texType = TextureType.TwoD;
										bool isAlpha = false;
										bool sRGBRead = false;
										PixelFormat format = PixelFormat.Unknown;
										int mipmaps = -1;//MIP_DEFAULT;

										while ( j != null )
										{
											if ( j is AtomAbstractNode )
											{
												AtomAbstractNode atom = (AtomAbstractNode)j;
												switch ( (Keywords)atom.Id )
												{
													case Keywords.ID_1D:
														texType = TextureType.OneD;
														break;

													case Keywords.ID_2D:
														texType = TextureType.TwoD;
														break;

													case Keywords.ID_3D:
														texType = TextureType.ThreeD;
														break;

													case Keywords.ID_CUBIC:
														texType = TextureType.CubeMap;
														break;

													case Keywords.ID_UNLIMITED:
														mipmaps = 0x7FFFFFFF;//MIP_UNLIMITED;
														break;

													case Keywords.ID_ALPHA:
														isAlpha = true;
														break;

													case Keywords.ID_GAMMA:
														sRGBRead = true;
														break;

													default:
														if ( atom.IsNumber )
															mipmaps = (int)atom.Number;
														else
															format = PixelUtil.GetFormatFromName( atom.Value, true );
														break;
												}
											}
											else
											{
												compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
													j.Value + " is not a supported argument to the texture property" );
											}

											j = getNodeAt( prop.Values, index++ );
										}

										ScriptCompilerEvent evt = new ProcessResourceNameScriptCompilerEvent(
											ProcessResourceNameScriptCompilerEvent.ResourceType.Texture, val );

										compiler._fireEvent( ref evt );

										string textureName = ( (ProcessResourceNameScriptCompilerEvent)evt ).Name;

										_textureunit.SetTextureName( textureName, texType );
										_textureunit.DesiredFormat = format;
										_textureunit.IsAlpha = isAlpha;
										_textureunit.MipmapCount = mipmaps;
										_textureunit.IsHardwareGammaEnabled = sRGBRead;
									}
									else
										compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
											j.Value + " is not a valid texture name" );
								}
								break;
							#endregion ID_TEXTURE

							#region ID_ANIM_TEXTURE
							case Keywords.ID_ANIM_TEXTURE:
								if ( prop.Values.Count < 3 )
								{
									compiler.AddError( CompileErrorCode.StringExpected, prop.File, prop.Line );
								}
								else
								{
									AbstractNode i1 = getNodeAt( prop.Values, 1 );
									if ( i1 is AtomAbstractNode && ( (AtomAbstractNode)i ).IsNumber )
									{
										// Short form
										AbstractNode i0 = getNodeAt( prop.Values, 0 ), i2 = getNodeAt( prop.Values, 2 );
										if ( i0 is AtomAbstractNode )
										{
											string val0;
											int val1;
											Real val2;
											if ( getString( i0, out val0 ) && getInt( i1, out val1 ) && getReal( i2, out val2 ) )
											{
												ScriptCompilerEvent evt = new ProcessResourceNameScriptCompilerEvent(
													ProcessResourceNameScriptCompilerEvent.ResourceType.Texture, val0 );

												compiler._fireEvent( ref evt );
												string evtName = ( (ProcessResourceNameScriptCompilerEvent)evt ).Name;

												_textureunit.SetAnimatedTextureName( evtName, val1, val2 );
											}
											else
											{
												compiler.AddError( CompileErrorCode.NumberExpected, prop.File, prop.Line,
													"anim_texture short form requires a texture name, number of frames, and animation duration" );
											}
										}
										else
										{
											compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
												"anim_texture short form requires a texture name, number of frames, and animation duration" );
										}
									}
									else
									{
										// Long form has n number of frames
										Real duration = 0;
										AbstractNode inNode = getNodeAt( prop.Values, prop.Values.Count - 1 );
										if ( getReal( inNode, out duration ) )
										{
											string[] names = new string[ prop.Values.Count - 1 ];
											int n = 0;

											AbstractNode j = prop.Values[ 0 ];
											int index = 0;
											while ( j != inNode )
											{
												if ( j is AtomAbstractNode )
												{
													string name = ( (AtomAbstractNode)j ).Value;

#warning check this if statement
													// Run the name through the listener
													if ( compiler.Listener != null )
													{
														ScriptCompilerEvent evt = new ProcessResourceNameScriptCompilerEvent(
															ProcessResourceNameScriptCompilerEvent.ResourceType.Texture, name );

														compiler._fireEvent( ref evt );
														names[ n++ ] = ( (ProcessResourceNameScriptCompilerEvent)evt ).Name;
													}
													else
													{
														names[ n++ ] = name;
													}
												}
												else
													compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
														j.Value + " is not supported as a texture name" );

												++index;
												j = prop.Values[ index ];
											}

											_textureunit.SetAnimatedTextureName( names, n, duration );
										}
										else
										{
											compiler.AddError( CompileErrorCode.NumberExpected, prop.File, prop.Line,
												inNode.Value + " is not supported for the duration argument" );
										}
									}
								}
								break;
							#endregion ID_ANIM_TEXTURE

							#region ID_CUBIC_TEXTURE
							case Keywords.ID_CUBIC_TEXTURE:
								if ( prop.Values.Count == 0 )
								{
									compiler.AddError( CompileErrorCode.StringExpected, prop.File, prop.Line );
								}
								else if ( prop.Values.Count == 2 )
								{
									AbstractNode i0 = getNodeAt( prop.Values, 0 ), i1 = getNodeAt( prop.Values, 1 );
									if ( i0 is AtomAbstractNode && i1 is AtomAbstractNode )
									{
										AtomAbstractNode atom0 = (AtomAbstractNode)i0, atom1 = (AtomAbstractNode)i1;

										ScriptCompilerEvent evt = new ProcessResourceNameScriptCompilerEvent(
											ProcessResourceNameScriptCompilerEvent.ResourceType.Texture, atom0.Value );

										compiler._fireEvent( ref evt );
										string evtName = ( (ProcessResourceNameScriptCompilerEvent)evt ).Name;

										_textureunit.SetCubicTextureName( evtName, atom1.Id == (uint)Keywords.ID_COMBINED_UVW );
									}
									else
									{
										compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line );
									}
								}
								else if ( prop.Values.Count == 7 )
								{
									AbstractNode i0 = getNodeAt( prop.Values, 0 ),
										i1 = getNodeAt( prop.Values, 1 ),
										i2 = getNodeAt( prop.Values, 2 ),
										i3 = getNodeAt( prop.Values, 3 ),
										i4 = getNodeAt( prop.Values, 4 ),
										i5 = getNodeAt( prop.Values, 5 ),
										i6 = getNodeAt( prop.Values, 6 );

									if ( i0 is AtomAbstractNode && i1 is AtomAbstractNode && i2 is AtomAbstractNode &&
										i3 is AtomAbstractNode && i4 is AtomAbstractNode && i5 is AtomAbstractNode &&
										i6 is AtomAbstractNode )
									{
										AtomAbstractNode atom0 = (AtomAbstractNode)i0, atom1 = (AtomAbstractNode)i1,
											atom2 = (AtomAbstractNode)i2, atom3 = (AtomAbstractNode)i3,
											atom4 = (AtomAbstractNode)i4, atom5 = (AtomAbstractNode)i5,
											atom6 = (AtomAbstractNode)i6;

										string[] names = new string[ 6 ];
										names[ 0 ] = atom0.Value;
										names[ 1 ] = atom1.Value;
										names[ 2 ] = atom2.Value;
										names[ 3 ] = atom3.Value;
										names[ 4 ] = atom4.Value;
										names[ 5 ] = atom5.Value;

										if ( compiler.Listener != null )
										{
											// Run each name through the listener
											for ( int j = 0; j < 6; ++j )
											{
												ScriptCompilerEvent evt = new ProcessResourceNameScriptCompilerEvent(
													ProcessResourceNameScriptCompilerEvent.ResourceType.Texture, names[ j ] );

												compiler._fireEvent( ref evt );
												names[ j ] = ( (ProcessResourceNameScriptCompilerEvent)evt ).Name;
											}
										}

										_textureunit.SetCubicTextureName( names, atom6.Id == (uint)Keywords.ID_COMBINED_UVW );
									}

								}
								else
								{
									compiler.AddError( CompileErrorCode.FewerParametersExpected, prop.File, prop.Line,
										"cubic_texture must have at most 7 arguments" );
								}
								break;
							#endregion ID_CUBIC_TEXTURE

							#region ID_TEX_COORD_SET
							case Keywords.ID_TEX_COORD_SET:
								if ( prop.Values.Count == 0 )
								{
									compiler.AddError( CompileErrorCode.StringExpected, prop.File, prop.Line );
								}
								else if ( prop.Values.Count > 1 )
								{
									compiler.AddError( CompileErrorCode.FewerParametersExpected, prop.File, prop.Line,
										"tex_coord_set must have at most 1 argument" );
								}
								else
								{
									int val = 0;
									if ( getInt( prop.Values[ 0 ], out val ) )
										_textureunit.TextureCoordSet = val;
									else
										compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
											prop.Values[ 0 ].Value + " is not supported as an integer argument" );
								}
								break;
							#endregion ID_TEX_COORD_SET

							#region ID_TEX_ADDRESS_MODE
							case Keywords.ID_TEX_ADDRESS_MODE:
								if ( prop.Values.Count == 0 )
								{
									compiler.AddError( CompileErrorCode.StringExpected, prop.File, prop.Line );
								}
								else
								{
									AbstractNode i0 = getNodeAt( prop.Values, 0 ),
										i1 = getNodeAt( prop.Values, 1 ),
										i2 = getNodeAt( prop.Values, 2 );

									UVWAddressing mode = new UVWAddressing( TextureAddressing.Wrap );

									if ( i0 != null && i0 is AtomAbstractNode )
									{
										AtomAbstractNode atom = (AtomAbstractNode)i0;
										switch ( (Keywords)atom.Id )
										{
											case Keywords.ID_WRAP:
												mode.U = TextureAddressing.Wrap;
												break;

											case Keywords.ID_CLAMP:
												mode.U = TextureAddressing.Clamp;
												break;

											case Keywords.ID_MIRROR:
												mode.U = TextureAddressing.Mirror;
												break;

											case Keywords.ID_BORDER:
												mode.U = TextureAddressing.Border;
												break;

											default:
												compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
													i0.Value + " not supported as first argument (must be \"wrap\", \"clamp\", \"mirror\", or \"border\")" );
												break;
										}
									}
									mode.V = mode.U;
									mode.W = mode.U;

									if ( i1 != null && i1 is AtomAbstractNode )
									{
										AtomAbstractNode atom = (AtomAbstractNode)i1;
										switch ( (Keywords)atom.Id )
										{
											case Keywords.ID_WRAP:
												mode.V = TextureAddressing.Wrap;
												break;

											case Keywords.ID_CLAMP:
												mode.V = TextureAddressing.Clamp;
												break;

											case Keywords.ID_MIRROR:
												mode.V = TextureAddressing.Mirror;
												break;

											case Keywords.ID_BORDER:
												mode.V = TextureAddressing.Border;
												break;

											default:
												compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
													i0.Value + " not supported as second argument (must be \"wrap\", \"clamp\", \"mirror\", or \"border\")" );
												break;
										}
									}

									if ( i2 != null && i2 is AtomAbstractNode )
									{
										AtomAbstractNode atom = (AtomAbstractNode)i2;
										switch ( (Keywords)atom.Id )
										{
											case Keywords.ID_WRAP:
												mode.W = TextureAddressing.Wrap;
												break;

											case Keywords.ID_CLAMP:
												mode.W = TextureAddressing.Clamp;
												break;

											case Keywords.ID_MIRROR:
												mode.W = TextureAddressing.Mirror;
												break;

											case Keywords.ID_BORDER:
												mode.W = TextureAddressing.Border;
												break;

											default:
												compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
													i0.Value + " not supported as third argument (must be \"wrap\", \"clamp\", \"mirror\", or \"border\")" );
												break;
										}
									}

									_textureunit.SetTextureAddressingMode( mode );
								}
								break;
							#endregion ID_TEX_ADDRESS_MODE

							#region ID_TEX_BORDER_COLOUR
							case Keywords.ID_TEX_BORDER_COLOUR:
								if ( prop.Values.Count == 0 )
								{
									compiler.AddError( CompileErrorCode.NumberExpected, prop.File, prop.Line );
								}
								else
								{
									ColorEx val;
									if ( getColor( prop.Values, 0, out val ) )
										_textureunit.TextureBorderColor = val;
									else
										compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
											"tex_border_colour only accepts a colour argument" );
								}
								break;
							#endregion ID_TEX_BORDER_COLOUR

							#region ID_FILTERING
							case Keywords.ID_FILTERING:
								if ( prop.Values.Count == 0 )
								{
									compiler.AddError( CompileErrorCode.StringExpected, prop.File, prop.Line );
								}
								else if ( prop.Values.Count == 1 )
								{
									if ( prop.Values[ 0 ] is AtomAbstractNode )
									{
										AtomAbstractNode atom = (AtomAbstractNode)prop.Values[ 0 ];
										switch ( (Keywords)atom.Id )
										{
											case Keywords.ID_NONE:
												_textureunit.SetTextureFiltering( TextureFiltering.None );
												break;

											case Keywords.ID_BILINEAR:
												_textureunit.SetTextureFiltering( TextureFiltering.Bilinear );
												break;

											case Keywords.ID_TRILINEAR:
												_textureunit.SetTextureFiltering( TextureFiltering.Trilinear );
												break;

											case Keywords.ID_ANISOTROPIC:
												_textureunit.SetTextureFiltering( TextureFiltering.Anisotropic );
												break;

											default:
												compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
													prop.Values[ 0 ].Value + " not supported as first argument (must be \"none\", \"bilinear\", \"trilinear\", or \"anisotropic\")" );
												break;
										}
									}
									else
									{
										compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
											prop.Values[ 0 ].Value + " not supported as first argument (must be \"none\", \"bilinear\", \"trilinear\", or \"anisotropic\")" );
									}
								}
								else if ( prop.Values.Count == 3 )
								{
									AbstractNode i0 = getNodeAt( prop.Values, 0 ),
										i1 = getNodeAt( prop.Values, 1 ),
										i2 = getNodeAt( prop.Values, 2 );

									if ( i0 is AtomAbstractNode && i1 is AtomAbstractNode && i2 is AtomAbstractNode )
									{
										AtomAbstractNode atom0 = (AtomAbstractNode)i0,
											atom1 = (AtomAbstractNode)i1,
											atom2 = (AtomAbstractNode)i2;

										FilterOptions tmin = FilterOptions.None, tmax = FilterOptions.None, tmip = FilterOptions.None;
										switch ( (Keywords)atom0.Id )
										{
											case Keywords.ID_NONE:
												tmin = FilterOptions.None;
												break;

											case Keywords.ID_POINT:
												tmin = FilterOptions.Point;
												break;

											case Keywords.ID_LINEAR:
												tmin = FilterOptions.Linear;
												break;

											case Keywords.ID_ANISOTROPIC:
												tmin = FilterOptions.Anisotropic;
												break;

											default:
												compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
													i0.Value + " not supported as first argument (must be \"none\", \"point\", \"linear\", or \"anisotropic\")" );
												break;
										}

										switch ( (Keywords)atom1.Id )
										{
											case Keywords.ID_NONE:
												tmax = FilterOptions.None;
												break;

											case Keywords.ID_POINT:
												tmax = FilterOptions.Point;
												break;

											case Keywords.ID_LINEAR:
												tmax = FilterOptions.Linear;
												break;

											case Keywords.ID_ANISOTROPIC:
												tmax = FilterOptions.Anisotropic;
												break;

											default:
												compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
													i0.Value + " not supported as second argument (must be \"none\", \"point\", \"linear\", or \"anisotropic\")" );
												break;
										}

										switch ( (Keywords)atom2.Id )
										{
											case Keywords.ID_NONE:
												tmip = FilterOptions.None;
												break;

											case Keywords.ID_POINT:
												tmip = FilterOptions.Point;
												break;

											case Keywords.ID_LINEAR:
												tmip = FilterOptions.Linear;
												break;

											case Keywords.ID_ANISOTROPIC:
												tmip = FilterOptions.Anisotropic;
												break;

											default:
												compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
													i0.Value + " not supported as third argument (must be \"none\", \"point\", \"linear\", or \"anisotropic\")" );
												break;
										}

										_textureunit.SetTextureFiltering( tmin, tmax, tmip );
									}
									else
									{
										compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line );
									}
								}
								else
								{
									compiler.AddError( CompileErrorCode.FewerParametersExpected, prop.File, prop.Line,
										"filtering must have either 1 or 3 arguments" );
								}
								break;
							#endregion ID_FILTERING

							#region ID_MAX_ANISOTROPY
							case Keywords.ID_MAX_ANISOTROPY:
								if ( prop.Values.Count == 0 )
								{
									compiler.AddError( CompileErrorCode.NumberExpected, prop.File, prop.Line );
								}
								else if ( prop.Values.Count > 1 )
								{
									compiler.AddError( CompileErrorCode.FewerParametersExpected, prop.File, prop.Line,
										"max_anisotropy must have at most 1 argument" );
								}
								else
								{
									int val = 0;
									if ( getInt( prop.Values[ 0 ], out val ) )
										_textureunit.TextureAnisotropy = val;
									else
										compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
											prop.Values[ 0 ].Value + " is not a valid integer argument" );
								}
								break;
							#endregion ID_MAX_ANISOTROPY

							#region ID_MIPMAP_BIAS
							case Keywords.ID_MIPMAP_BIAS:
								if ( prop.Values.Count == 0 )
								{
									compiler.AddError( CompileErrorCode.NumberExpected, prop.File, prop.Line );
								}
								else if ( prop.Values.Count > 1 )
								{
									compiler.AddError( CompileErrorCode.FewerParametersExpected, prop.File, prop.Line,
										"mipmap_bias must have at most 1 argument" );
								}
								else
								{
									throw new NotImplementedException();
#if UNREACHABLE_CODE
									Real val = 0.0f;
									if ( getReal( prop.Values[ 0 ], out val ) )
									{ /*mUnit->setTextureMipmapBias(val);*/
									}
									else
										compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
											prop.Values[ 0 ].Value + " is not a valid number argument" );
#endif
								}
								break;
							#endregion ID_MIPMAP_BIAS

							#region ID_COLOUR_OP
							case Keywords.ID_COLOUR_OP:
								if ( prop.Values.Count == 0 )
								{
									compiler.AddError( CompileErrorCode.NumberExpected, prop.File, prop.Line );
								}
								else if ( prop.Values.Count > 1 )
								{
									compiler.AddError( CompileErrorCode.FewerParametersExpected, prop.File, prop.Line,
										"colour_op must have at most 1 argument" );
								}
								else
								{
									if ( prop.Values[ 0 ] is AtomAbstractNode )
									{
										AtomAbstractNode atom = (AtomAbstractNode)prop.Values[ 0 ];
										switch ( (Keywords)atom.Id )
										{
											case Keywords.ID_REPLACE:
												_textureunit.ColorOperation = LayerBlendOperation.Replace;
												break;

											case Keywords.ID_ADD:
												_textureunit.ColorOperation = LayerBlendOperation.Add;
												break;

											case Keywords.ID_MODULATE:
												_textureunit.ColorOperation = LayerBlendOperation.Modulate;
												break;

											case Keywords.ID_ALPHA_BLEND:
												_textureunit.ColorOperation = LayerBlendOperation.AlphaBlend;
												break;

											default:
												compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
													prop.Values[ 0 ].Value + " is not a valid argument (must be \"replace\", \"add\", \"modulate\", or \"alpha_blend\")" );
												break;
										}
									}
									else
									{
										compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
											prop.Values[ 0 ].Value + " is not a valid argument (must be \"replace\", \"add\", \"modulate\", or \"alpha_blend\")" );
									}
								}
								break;
							#endregion ID_COLOUR_OP

							#region ID_COLOUR_OP_EX
							case Keywords.ID_COLOUR_OP_EX:
								if ( prop.Values.Count < 3 )
								{
									compiler.AddError( CompileErrorCode.StringExpected, prop.File, prop.Line,
										"colour_op_ex must have at least 3 arguments" );
								}
								else if ( prop.Values.Count > 10 )
								{
									compiler.AddError( CompileErrorCode.FewerParametersExpected, prop.File, prop.Line,
										"colour_op_ex must have at most 10 arguments" );
								}
								else
								{
									AbstractNode i0 = getNodeAt( prop.Values, 0 ),
										i1 = getNodeAt( prop.Values, 1 ),
										i2 = getNodeAt( prop.Values, 2 );

									if ( i0 is AtomAbstractNode && i1 is AtomAbstractNode && i2 is AtomAbstractNode )
									{
										AtomAbstractNode atom0 = (AtomAbstractNode)i0,
											atom1 = (AtomAbstractNode)i1,
											atom2 = (AtomAbstractNode)i2;

										LayerBlendOperationEx op = LayerBlendOperationEx.Add;
										LayerBlendSource source1 = LayerBlendSource.Current, source2 = LayerBlendSource.Texture;
										ColorEx arg1 = ColorEx.White, arg2 = ColorEx.White;
										Real manualBlend = 0.0f;

										switch ( (Keywords)atom0.Id )
										{
											case Keywords.ID_SOURCE1:
												op = LayerBlendOperationEx.Source1;
												break;

											case Keywords.ID_SOURCE2:
												op = LayerBlendOperationEx.Source2;
												break;

											case Keywords.ID_MODULATE:
												op = LayerBlendOperationEx.Modulate;
												break;

											case Keywords.ID_MODULATE_X2:
												op = LayerBlendOperationEx.ModulateX2;
												break;

											case Keywords.ID_MODULATE_X4:
												op = LayerBlendOperationEx.ModulateX4;
												break;

											case Keywords.ID_ADD:
												op = LayerBlendOperationEx.Add;
												break;

											case Keywords.ID_ADD_SIGNED:
												op = LayerBlendOperationEx.AddSigned;
												break;

											case Keywords.ID_ADD_SMOOTH:
												op = LayerBlendOperationEx.AddSmooth;
												break;

											case Keywords.ID_SUBTRACT:
												op = LayerBlendOperationEx.Subtract;
												break;

											case Keywords.ID_BLEND_DIFFUSE_ALPHA:
												op = LayerBlendOperationEx.BlendDiffuseAlpha;
												break;

											case Keywords.ID_BLEND_TEXTURE_ALPHA:
												op = LayerBlendOperationEx.BlendTextureAlpha;
												break;

											case Keywords.ID_BLEND_CURRENT_ALPHA:
												op = LayerBlendOperationEx.BlendCurrentAlpha;
												break;

											case Keywords.ID_BLEND_MANUAL:
												op = LayerBlendOperationEx.BlendManual;
												break;

											case Keywords.ID_DOT_PRODUCT:
												op = LayerBlendOperationEx.DotProduct;
												break;

											case Keywords.ID_BLEND_DIFFUSE_COLOUR:
												op = LayerBlendOperationEx.BlendDiffuseColor;
												break;

											default:
												compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
													i0.Value + " is not a valid first argument (must be \"source1\", \"source2\", \"modulate\", \"modulate_x2\", \"modulate_x4\", \"add\", \"add_signed\", \"add_smooth\", \"subtract\", \"blend_diffuse_alpha\", \"blend_texture_alpha\", \"blend_current_alpha\", \"blend_manual\", \"dot_product\", or \"blend_diffuse_colour\")" );
												break;
										}

										switch ( (Keywords)atom1.Id )
										{
											case Keywords.ID_SRC_CURRENT:
												source1 = LayerBlendSource.Current;
												break;

											case Keywords.ID_SRC_TEXTURE:
												source1 = LayerBlendSource.Texture;
												break;

											case Keywords.ID_SRC_DIFFUSE:
												source1 = LayerBlendSource.Diffuse;
												break;

											case Keywords.ID_SRC_SPECULAR:
												source1 = LayerBlendSource.Specular;
												break;

											case Keywords.ID_SRC_MANUAL:
												source1 = LayerBlendSource.Manual;
												break;

											default:
												compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
													i1.Value + " is not a valid second argument (must be \"src_current\", \"src_texture\", \"src_diffuse\", \"src_specular\", or \"src_manual\")" );
												break;
										}

										switch ( (Keywords)atom2.Id )
										{
											case Keywords.ID_SRC_CURRENT:
												source2 = LayerBlendSource.Current;
												break;

											case Keywords.ID_SRC_TEXTURE:
												source2 = LayerBlendSource.Texture;
												break;

											case Keywords.ID_SRC_DIFFUSE:
												source2 = LayerBlendSource.Diffuse;
												break;

											case Keywords.ID_SRC_SPECULAR:
												source2 = LayerBlendSource.Specular;
												break;

											case Keywords.ID_SRC_MANUAL:
												source2 = LayerBlendSource.Manual;
												break;

											default:
												compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
													i2.Value + " is not a valid third argument (must be \"src_current\", \"src_texture\", \"src_diffuse\", \"src_specular\", or \"src_manual\")" );
												break;
										}

										if ( op == LayerBlendOperationEx.BlendManual )
										{
											AbstractNode i3 = getNodeAt( prop.Values, 3 );
											if ( i3 != null )
											{
												if ( !getReal( i3, out manualBlend ) )
													compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
														i3.Value + " is not a valid number argument" );
											}
											else
											{
												compiler.AddError( CompileErrorCode.NumberExpected, prop.File, prop.Line,
													"fourth argument expected when blend_manual is used" );
											}
										}

										AbstractNode j = getNodeAt( prop.Values, 3 );
										int index = 3;
										if ( op == LayerBlendOperationEx.BlendManual )
											j = getNodeAt( prop.Values, ++index );

										if ( source1 == LayerBlendSource.Manual )
										{
											if ( j != null )
											{
												if ( !getColor( prop.Values, 3, out arg1, 3 ) )
													compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
														"valid colour expected when src_manual is used" );
											}
											else
											{
												compiler.AddError( CompileErrorCode.NumberExpected, prop.File, prop.Line,
													"valid colour expected when src_manual is used" );
											}
										}

										if ( source2 == LayerBlendSource.Manual )
										{
											if ( j != null )
											{
												if ( !getColor( prop.Values, 3, out arg2, 3 ) )
													compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
														"valid colour expected when src_manual is used" );
											}
											else
											{
												compiler.AddError( CompileErrorCode.NumberExpected, prop.File, prop.Line,
													"valid colour expected when src_manual is used" );
											}
										}

										_textureunit.SetColorOperationEx( op, source1, source2, arg1, arg2, manualBlend );
									}
									else
									{
										compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line );
									}
								}
								break;
							#endregion ID_COLOUR_OP_EX

							#region ID_COLOUR_OP_MULTIPASS_FALLBACK
							case Keywords.ID_COLOUR_OP_MULTIPASS_FALLBACK:
								if ( prop.Values.Count == 0 )
								{
									compiler.AddError( CompileErrorCode.StringExpected, prop.File, prop.Line );
								}
								else if ( prop.Values.Count > 2 )
								{
									compiler.AddError( CompileErrorCode.FewerParametersExpected, prop.File, prop.Line,
										"colour_op_multiplass_fallback must have at most 2 arguments" );
								}
								else if ( prop.Values.Count == 1 )
								{
									if ( prop.Values[ 0 ] is AtomAbstractNode )
									{
										AtomAbstractNode atom = (AtomAbstractNode)prop.Values[ 0 ];
										switch ( (Keywords)atom.Id )
										{
											case Keywords.ID_ADD:
												_textureunit.SetColorOpMultipassFallback( SceneBlendFactor.One, SceneBlendFactor.One );
												break;

											case Keywords.ID_MODULATE:
												_textureunit.SetColorOpMultipassFallback( SceneBlendFactor.DestColor, SceneBlendFactor.Zero );
												break;

											case Keywords.ID_COLOUR_BLEND:
												_textureunit.SetColorOpMultipassFallback( SceneBlendFactor.SourceColor, SceneBlendFactor.OneMinusSourceColor );
												break;

											case Keywords.ID_ALPHA_BLEND:
												_textureunit.SetColorOpMultipassFallback( SceneBlendFactor.SourceAlpha, SceneBlendFactor.OneMinusSourceAlpha );
												break;

											case Keywords.ID_REPLACE:
												_textureunit.SetColorOpMultipassFallback( SceneBlendFactor.One, SceneBlendFactor.Zero );
												break;

											default:
												compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
													"argument must be a valid scene blend type (add, modulate, colour_blend, alpha_blend, or replace)" );
												break;
										}
									}
									else
									{
										compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
											"argument must be a valid scene blend type (add, modulate, colour_blend, alpha_blend, or replace)" );
									}
								}
								else
								{
									AbstractNode i0 = getNodeAt( prop.Values, 0 ), i1 = getNodeAt( prop.Values, 1 );
									SceneBlendFactor sbf0, sbf1;
									if ( getEnumeration<SceneBlendFactor>( i0, compiler, out sbf0 ) && getEnumeration<SceneBlendFactor>( i1, compiler, out sbf1 ) )
										_textureunit.SetColorOpMultipassFallback( sbf0, sbf1 );
									else
										compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
											"arguments must be valid scene blend factors" );
								}
								break;
							#endregion ID_COLOUR_OP_MULTIPASS_FALLBACK

							#region ID_ALPHA_OP_EX
							case Keywords.ID_ALPHA_OP_EX:
								if ( prop.Values.Count < 3 )
								{
									compiler.AddError( CompileErrorCode.StringExpected, prop.File, prop.Line,
										"alpha_op_ex must have at least 3 arguments" );
								}
								else if ( prop.Values.Count > 6 )
								{
									compiler.AddError( CompileErrorCode.FewerParametersExpected, prop.File, prop.Line,
										"alpha_op_ex must have at most 6 arguments" );
								}
								else
								{
									AbstractNode i0 = getNodeAt( prop.Values, 0 ),
										i1 = getNodeAt( prop.Values, 1 ),
										i2 = getNodeAt( prop.Values, 2 );

									if ( i0 is AtomAbstractNode && i1 is AtomAbstractNode && i2 is AtomAbstractNode )
									{
										AtomAbstractNode atom0 = (AtomAbstractNode)i0,
											atom1 = (AtomAbstractNode)i1,
											atom2 = (AtomAbstractNode)i2;

										LayerBlendOperationEx op = LayerBlendOperationEx.Add;
										LayerBlendSource source1 = LayerBlendSource.Current, source2 = LayerBlendSource.Texture;
										Real arg1 = 0.0f, arg2 = 0.0f;
										Real manualBlend = 0.0f;

										switch ( (Keywords)atom0.Id )
										{
											case Keywords.ID_SOURCE1:
												op = LayerBlendOperationEx.Source1;
												break;

											case Keywords.ID_SOURCE2:
												op = LayerBlendOperationEx.Source2;
												break;

											case Keywords.ID_MODULATE:
												op = LayerBlendOperationEx.Modulate;
												break;

											case Keywords.ID_MODULATE_X2:
												op = LayerBlendOperationEx.ModulateX2;
												break;

											case Keywords.ID_MODULATE_X4:
												op = LayerBlendOperationEx.ModulateX4;
												break;

											case Keywords.ID_ADD:
												op = LayerBlendOperationEx.Add;
												break;

											case Keywords.ID_ADD_SIGNED:
												op = LayerBlendOperationEx.AddSigned;
												break;

											case Keywords.ID_ADD_SMOOTH:
												op = LayerBlendOperationEx.AddSmooth;
												break;

											case Keywords.ID_SUBTRACT:
												op = LayerBlendOperationEx.Subtract;
												break;

											case Keywords.ID_BLEND_DIFFUSE_ALPHA:
												op = LayerBlendOperationEx.BlendDiffuseAlpha;
												break;

											case Keywords.ID_BLEND_TEXTURE_ALPHA:
												op = LayerBlendOperationEx.BlendTextureAlpha;
												break;

											case Keywords.ID_BLEND_CURRENT_ALPHA:
												op = LayerBlendOperationEx.BlendCurrentAlpha;
												break;

											case Keywords.ID_BLEND_MANUAL:
												op = LayerBlendOperationEx.BlendManual;
												break;

											case Keywords.ID_DOT_PRODUCT:
												op = LayerBlendOperationEx.DotProduct;
												break;

											case Keywords.ID_BLEND_DIFFUSE_COLOUR:
												op = LayerBlendOperationEx.BlendDiffuseColor;
												break;

											default:
												compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
													i0.Value + " is not a valid first argument (must be \"source1\", \"source2\", \"modulate\", \"modulate_x2\", \"modulate_x4\", \"add\", \"add_signed\", \"add_smooth\", \"subtract\", \"blend_diffuse_alpha\", \"blend_texture_alpha\", \"blend_current_alpha\", \"blend_manual\", \"dot_product\", or \"blend_diffuse_colour\")" );
												break;
										}

										switch ( (Keywords)atom1.Id )
										{
											case Keywords.ID_SRC_CURRENT:
												source1 = LayerBlendSource.Current;
												break;

											case Keywords.ID_SRC_TEXTURE:
												source1 = LayerBlendSource.Texture;
												break;

											case Keywords.ID_SRC_DIFFUSE:
												source1 = LayerBlendSource.Diffuse;
												break;

											case Keywords.ID_SRC_SPECULAR:
												source1 = LayerBlendSource.Specular;
												break;

											case Keywords.ID_SRC_MANUAL:
												source1 = LayerBlendSource.Manual;
												break;

											default:
												compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
													i1.Value + " is not a valid second argument (must be \"src_current\", \"src_texture\", \"src_diffuse\", \"src_specular\", or \"src_manual\")" );
												break;
										}

										switch ( (Keywords)atom2.Id )
										{
											case Keywords.ID_SRC_CURRENT:
												source2 = LayerBlendSource.Current;
												break;

											case Keywords.ID_SRC_TEXTURE:
												source2 = LayerBlendSource.Texture;
												break;

											case Keywords.ID_SRC_DIFFUSE:
												source2 = LayerBlendSource.Diffuse;
												break;

											case Keywords.ID_SRC_SPECULAR:
												source2 = LayerBlendSource.Specular;
												break;

											case Keywords.ID_SRC_MANUAL:
												source2 = LayerBlendSource.Manual;
												break;

											default:
												compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
													i2.Value + " is not a valid third argument (must be \"src_current\", \"src_texture\", \"src_diffuse\", \"src_specular\", or \"src_manual\")" );
												break;
										}

										if ( op == LayerBlendOperationEx.BlendManual )
										{
											AbstractNode i3 = getNodeAt( prop.Values, 3 );
											if ( i3 != null )
											{
												if ( !getReal( i3, out manualBlend ) )
													compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
														"valid number expected when blend_manual is used" );
											}
											else
											{
												compiler.AddError( CompileErrorCode.NumberExpected, prop.File, prop.Line,
													"valid number expected when blend_manual is used" );
											}
										}

										AbstractNode j = getNodeAt( prop.Values, 3 );
										int index = 3;
										if ( op == LayerBlendOperationEx.BlendManual )
											j = getNodeAt( prop.Values, ++index );

										if ( source1 == LayerBlendSource.Manual )
										{
											if ( j != null )
											{
												if ( !getReal( j, out arg1 ) )
													compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
														"valid colour expected when src_manual is used" );
												else
													j = getNodeAt( prop.Values, ++index );
											}
											else
											{
												compiler.AddError( CompileErrorCode.NumberExpected, prop.File, prop.Line,
													"valid colour expected when src_manual is used" );
											}
										}

										if ( source2 == LayerBlendSource.Manual )
										{
											if ( j != null )
											{
												if ( !getReal( j, out arg2 ) )
													compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
														"valid colour expected when src_manual is used" );
											}
											else
											{
												compiler.AddError( CompileErrorCode.NumberExpected, prop.File, prop.Line,
													"valid colour expected when src_manual is used" );
											}
										}

										_textureunit.SetAlphaOperation( op, source1, source2, arg1, arg2, manualBlend );
									}
									else
									{
										compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line );
									}
								}
								break;
							#endregion ID_ALPHA_OP_EX

							#region ID_ENV_MAP
							case Keywords.ID_ENV_MAP:
								if ( prop.Values.Count == 0 )
								{
									compiler.AddError( CompileErrorCode.StringExpected, prop.File, prop.Line );
								}
								else if ( prop.Values.Count > 1 )
								{
									compiler.AddError( CompileErrorCode.FewerParametersExpected, prop.File, prop.Line,
										"env_map must have at most 1 argument" );
								}
								else
								{
									if ( prop.Values[ 0 ] is AtomAbstractNode )
									{
										AtomAbstractNode atom = (AtomAbstractNode)prop.Values[ 0 ];
										switch ( atom.Id )
										{
											case (uint)BuiltIn.ID_OFF:
												_textureunit.SetEnvironmentMap( false );
												break;

											case (uint)Keywords.ID_SPHERICAL:
												_textureunit.SetEnvironmentMap( true, EnvironmentMap.Curved );
												break;

											case (uint)Keywords.ID_PLANAR:
												_textureunit.SetEnvironmentMap( true, EnvironmentMap.Planar );
												break;

											case (uint)Keywords.ID_CUBIC_REFLECTION:
												_textureunit.SetEnvironmentMap( true, EnvironmentMap.Reflection );
												break;

											case (uint)Keywords.ID_CUBIC_NORMAL:
												_textureunit.SetEnvironmentMap( true, EnvironmentMap.Normal );
												break;

											default:
												compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
													prop.Values[ 0 ].Value + " is not a valid argument (must be \"off\", \"spherical\", \"planar\", \"cubic_reflection\", or \"cubic_normal\")" );
												break;
										}
									}
									else
									{
										compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
											prop.Values[ 0 ].Value + " is not a valid argument (must be \"off\", \"spherical\", \"planar\", \"cubic_reflection\", or \"cubic_normal\")" );
									}
								}
								break;
							#endregion ID_ENV_MAP

							#region ID_SCROLL
							case Keywords.ID_SCROLL:
								if ( prop.Values.Count == 0 )
								{
									compiler.AddError( CompileErrorCode.NumberExpected, prop.File, prop.Line );
								}
								else if ( prop.Values.Count > 2 )
								{
									compiler.AddError( CompileErrorCode.FewerParametersExpected, prop.File, prop.Line,
										"scroll must have at most 2 arguments" );
								}
								else
								{
									AbstractNode i0 = getNodeAt( prop.Values, 0 ), i1 = getNodeAt( prop.Values, 1 );
									Real x, y;
									if ( getReal( i0, out x ) && getReal( i1, out y ) )
										_textureunit.SetTextureScroll( x, y );
									else
										compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
											i0.Value + " and/or " + i1.Value + " is invalid; both must be numbers" );
								}
								break;
							#endregion ID_SCROLL

							#region ID_SCROLL_ANIM
							case Keywords.ID_SCROLL_ANIM:
								if ( prop.Values.Count == 0 )
								{
									compiler.AddError( CompileErrorCode.NumberExpected, prop.File, prop.Line );
								}
								else if ( prop.Values.Count > 2 )
								{
									compiler.AddError( CompileErrorCode.FewerParametersExpected, prop.File, prop.Line,
										"scroll_anim must have at most 2 arguments" );
								}
								else
								{
									AbstractNode i0 = getNodeAt( prop.Values, 0 ), i1 = getNodeAt( prop.Values, 1 );
									Real x, y;
									if ( getReal( i0, out x ) && getReal( i1, out y ) )
										_textureunit.SetScrollAnimation( x, y );
									else
										compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
											i0.Value + " and/or " + i1.Value + " is invalid; both must be numbers" );
								}
								break;
							#endregion ID_SCROLL_ANIM

							#region ID_ROTATE
							case Keywords.ID_ROTATE:
								if ( prop.Values.Count == 0 )
								{
									compiler.AddError( CompileErrorCode.NumberExpected, prop.File, prop.Line );
								}
								else if ( prop.Values.Count > 1 )
								{
									compiler.AddError( CompileErrorCode.FewerParametersExpected, prop.File, prop.Line,
										"rotate must have at most 1 argument" );
								}
								else
								{
									Real angle;
									if ( getReal( prop.Values[ 0 ], out angle ) )
#warning check this statement
										//mUnit->setTextureRotate(Degree(angle));
										_textureunit.SetTextureRotate( angle );
									else
										compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
											prop.Values[ 0 ].Value + " is not a valid number value" );
								}
								break;
							#endregion ID_ROTATE

							#region ID_ROTATE_ANIM
							case Keywords.ID_ROTATE_ANIM:
								if ( prop.Values.Count == 0 )
								{
									compiler.AddError( CompileErrorCode.NumberExpected, prop.File, prop.Line );
								}
								else if ( prop.Values.Count > 1 )
								{
									compiler.AddError( CompileErrorCode.FewerParametersExpected, prop.File, prop.Line,
										"rotate_anim must have at most 1 argument" );
								}
								else
								{
									Real angle;
									if ( getReal( prop.Values[ 0 ], out angle ) )
										_textureunit.SetRotateAnimation( angle );
									else
										compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
											prop.Values[ 0 ].Value + " is not a valid number value" );
								}
								break;
							#endregion ID_ROTATE_ANIM

							#region ID_SCALE
							case Keywords.ID_SCALE:
								if ( prop.Values.Count == 0 )
								{
									compiler.AddError( CompileErrorCode.NumberExpected, prop.File, prop.Line );
								}
								else if ( prop.Values.Count > 2 )
								{
									compiler.AddError( CompileErrorCode.FewerParametersExpected, prop.File, prop.Line,
										"scale must have at most 2 arguments" );
								}
								else
								{
									AbstractNode i0 = getNodeAt( prop.Values, 0 ), i1 = getNodeAt( prop.Values, 1 );
									Real x, y;
									if ( getReal( i0, out x ) && getReal( i1, out y ) )
										_textureunit.SetTextureScale( x, y );
									else
										compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
										"first and second arguments must both be valid number values (received " + i0.Value + ", " + i1.Value + ")" );
								}
								break;
							#endregion ID_SCALE

							#region ID_WAVE_XFORM
							case Keywords.ID_WAVE_XFORM:
								if ( prop.Values.Count == 0 )
								{
									compiler.AddError( CompileErrorCode.NumberExpected, prop.File, prop.Line );
								}
								else if ( prop.Values.Count > 6 )
								{
									compiler.AddError( CompileErrorCode.FewerParametersExpected, prop.File, prop.Line,
										"wave_xform must have at most 6 arguments" );
								}
								else
								{
									AbstractNode i0 = getNodeAt( prop.Values, 0 ), i1 = getNodeAt( prop.Values, 1 ),
										i2 = getNodeAt( prop.Values, 2 ), i3 = getNodeAt( prop.Values, 3 ),
										i4 = getNodeAt( prop.Values, 4 ), i5 = getNodeAt( prop.Values, 5 );

									if ( i0 is AtomAbstractNode && i1 is AtomAbstractNode && i2 is AtomAbstractNode &&
										i3 is AtomAbstractNode && i4 is AtomAbstractNode && i5 is AtomAbstractNode )
									{
										AtomAbstractNode atom0 = (AtomAbstractNode)i0, atom1 = (AtomAbstractNode)i1;
										TextureTransform type = TextureTransform.Rotate;
										WaveformType wave = WaveformType.Sine;
										Real baseVal = 0.0f, freq = 0.0f, phase = 0.0f, amp = 0.0f;

										switch ( (Keywords)atom0.Id )
										{
											case Keywords.ID_SCROLL_X:
												type = TextureTransform.TranslateU;
												break;

											case Keywords.ID_SCROLL_Y:
												type = TextureTransform.TranslateV;
												break;

											case Keywords.ID_SCALE_X:
												type = TextureTransform.ScaleU;
												break;

											case Keywords.ID_SCALE_Y:
												type = TextureTransform.ScaleV;
												break;

											case Keywords.ID_ROTATE:
												type = TextureTransform.Rotate;
												break;

											default:
												compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
													atom0.Value + " is not a valid transform type (must be \"scroll_x\", \"scroll_y\", \"scale_x\", \"scale_y\", or \"rotate\")" );
												break;
										}

										switch ( (Keywords)atom1.Id )
										{
											case Keywords.ID_SINE:
												wave = WaveformType.Sine;
												break;

											case Keywords.ID_TRIANGLE:
												wave = WaveformType.Triangle;
												break;

											case Keywords.ID_SQUARE:
												wave = WaveformType.Square;
												break;

											case Keywords.ID_SAWTOOTH:
												wave = WaveformType.Sawtooth;
												break;

											case Keywords.ID_INVERSE_SAWTOOTH:
												wave = WaveformType.InverseSawtooth;
												break;

											default:
												compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
													atom1.Value + " is not a valid waveform type (must be \"sine\", \"triangle\", \"square\", \"sawtooth\", or \"inverse_sawtooth\")" );
												break;
										}

										if ( !getReal( i2, out baseVal ) || !getReal( i3, out freq ) || !getReal( i4, out phase ) || !getReal( i5, out amp ) )
											compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
												"arguments 3, 4, 5, and 6 must be valid numbers; received " + i2.Value + ", " + i3.Value + ", " + i4.Value + ", " + i5.Value );

										_textureunit.SetTransformAnimation( type, wave, baseVal, freq, phase, amp );
									}
									else
									{
										compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line );
									}
								}
								break;
							#endregion ID_WAVE_XFORM

							#region ID_TRANSFORM
							case Keywords.ID_TRANSFORM:
						    {
						        throw new NotImplementedException();
#if UNREACHABLE_CODE
									Matrix4 m;
									if ( getMatrix4( prop.Values, 0, out m ) )
									{ /*mUnit->setTextureTransform(m);*/
									}
									else
										compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line );
								}
								break;
#else
						    }
#endif

						        #endregion ID_TRANSFORM

							#region ID_BINDING_TYPE
							case Keywords.ID_BINDING_TYPE:
								if ( prop.Values.Count == 0 )
								{
									compiler.AddError( CompileErrorCode.NumberExpected, prop.File, prop.Line );
								}
								else if ( prop.Values.Count > 1 )
								{
									compiler.AddError( CompileErrorCode.FewerParametersExpected, prop.File, prop.Line,
										"binding_type must have at most 1 argument" );
								}
								else
								{
									if ( prop.Values[ 0 ] is AtomAbstractNode )
									{
										AtomAbstractNode atom = (AtomAbstractNode)prop.Values[ 0 ];
										switch ( (Keywords)atom.Id )
										{
											case Keywords.ID_VERTEX:
												_textureunit.BindingType = TextureBindingType.Vertex;
												break;

											case Keywords.ID_FRAGMENT:
												_textureunit.BindingType = TextureBindingType.Fragment;
												break;

											default:
												compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
													atom.Value + " is not a valid binding type (must be \"vertex\" or \"fragment\")" );
												break;
										}
									}
									else
									{
										compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
											prop.Values[ 0 ].Value + " is not a valid binding type" );
									}
								}
								break;
							#endregion ID_BINDING_TYPE

							#region ID_CONTENT_TYPE
							case Keywords.ID_CONTENT_TYPE:
								if ( prop.Values.Count == 0 )
								{
									compiler.AddError( CompileErrorCode.NumberExpected, prop.File, prop.Line );
								}
								else if ( prop.Values.Count > 4 )
								{
									compiler.AddError( CompileErrorCode.FewerParametersExpected, prop.File, prop.Line,
										"content_type must have at most 4 arguments" );
								}
								else
								{
									if ( prop.Values[ 0 ] is AtomAbstractNode )
									{
										throw new NotImplementedException();
#if UNREACHABLE_CODE
										AtomAbstractNode atom = (AtomAbstractNode)prop.Values[ 0 ];
										switch ( (Keywords)atom.Id )
										{
											case Keywords.ID_NAMED:
												//mUnit->setContentType(TextureUnitState::CONTENT_NAMED);
												break;

											case Keywords.ID_SHADOW:
												//mUnit->setContentType(TextureUnitState::CONTENT_SHADOW);
												break;

											case Keywords.ID_COMPOSITOR:
												//mUnit->setContentType(TextureUnitState::CONTENT_COMPOSITOR);
												if ( prop.Values.Count >= 3 )
												{
													string compositorName;
													getString( getNodeAt( prop.Values, 1 ), out compositorName );
													string textureName;
													getString( getNodeAt( prop.Values, 2 ), out textureName );

													if ( prop.Values.Count == 4 )
													{
														uint mrtIndex;
														getUInt( getNodeAt( prop.Values, 3 ), out mrtIndex );
														//mUnit->setCompositorReference(compositorName, textureName, mrtIndex);
													}
													else
													{
														//mUnit->setCompositorReference(compositorName, textureName);
													}
												}
												else
												{
													compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
														"content_type compositor must have an additional 2 or 3 parameters" );
												}

												break;
											default:
												compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
													atom.Value + " is not a valid content type (must be \"named\" or \"shadow\" or \"compositor\")" );
												break;
										}
#endif
									}
									else
									{
										compiler.AddError( CompileErrorCode.InvalidParameters, prop.File, prop.Line,
											prop.Values[ 0 ].Value + " is not a valid content type" );
									}
								}
								break;