protected void Initialize()
{
// Create geometry
int nvertices = slices * 4; // n+1 planes
int elemsize = 3 * 3;
int dsize = elemsize * nvertices;
int x;
IndexData indexData = new IndexData();
VertexData vertexData = new VertexData();
float[] vertices = new float[ dsize ];
float[ , ] coords = new float[ 4, 2 ]
{
{0.0f, 0.0f},
{0.0f, 1.0f},
{1.0f, 0.0f},
{1.0f, 1.0f}
};
for ( x = 0; x < slices; x++ )
{
for ( int y = 0; y < 4; y++ )
{
float xcoord = coords[ y, 0 ] - 0.5f;
float ycoord = coords[ y, 1 ] - 0.5f;
float zcoord = -( (float)x / (float)( slices - 1 ) - 0.5f );
// 1.0f .. a/(a+1)
// coordinate
vertices[ x * 4 * elemsize + y * elemsize + 0 ] = xcoord * ( size / 2.0f );
vertices[ x * 4 * elemsize + y * elemsize + 1 ] = ycoord * ( size / 2.0f );
vertices[ x * 4 * elemsize + y * elemsize + 2 ] = zcoord * ( size / 2.0f );
// normal
vertices[ x * 4 * elemsize + y * elemsize + 3 ] = 0.0f;
vertices[ x * 4 * elemsize + y * elemsize + 4 ] = 0.0f;
vertices[ x * 4 * elemsize + y * elemsize + 5 ] = 1.0f;
// tex
vertices[ x * 4 * elemsize + y * elemsize + 6 ] = xcoord * Utility.Sqrt( 3.0f );
vertices[ x * 4 * elemsize + y * elemsize + 7 ] = ycoord * Utility.Sqrt( 3.0f );
vertices[ x * 4 * elemsize + y * elemsize + 8 ] = zcoord * Utility.Sqrt( 3.0f );
}
}
short[] faces = new short[ slices * 6 ];
for ( x = 0; x < slices; x++ )
{
faces[ x * 6 + 0 ] = (short)( x * 4 + 0 );
faces[ x * 6 + 1 ] = (short)( x * 4 + 1 );
faces[ x * 6 + 2 ] = (short)( x * 4 + 2 );
faces[ x * 6 + 3 ] = (short)( x * 4 + 1 );
faces[ x * 6 + 4 ] = (short)( x * 4 + 2 );
faces[ x * 6 + 5 ] = (short)( x * 4 + 3 );
}
//setup buffers
vertexData.vertexStart = 0;
vertexData.vertexCount = nvertices;
VertexDeclaration decl = vertexData.vertexDeclaration;
VertexBufferBinding bind = vertexData.vertexBufferBinding;
int offset = 0;
offset += decl.AddElement( 0, 0, VertexElementType.Float3, VertexElementSemantic.Position ).Size;
offset += decl.AddElement( 0, offset, VertexElementType.Float3, VertexElementSemantic.Normal ).Size;
offset += decl.AddElement( 0, offset, VertexElementType.Float3, VertexElementSemantic.TexCoords ).Size;
HardwareVertexBuffer vertexBuffer =
HardwareBufferManager.Instance.CreateVertexBuffer( decl, nvertices, BufferUsage.StaticWriteOnly );
bind.SetBinding( 0, vertexBuffer );
HardwareIndexBuffer indexBuffer =
HardwareBufferManager.Instance.CreateIndexBuffer( IndexType.Size16, slices * 6, BufferUsage.StaticWriteOnly );
indexData.indexBuffer = indexBuffer;
indexData.indexCount = slices * 6;
indexData.indexStart = 0;
indexBuffer.WriteData( 0, indexBuffer.Size, faces, true );
vertexBuffer.WriteData( 0, vertexBuffer.Size, vertices );
vertices = null;
faces = null;
// Now make the render operation
renderOperation.operationType = OperationType.TriangleList;
renderOperation.indexData = indexData;
renderOperation.vertexData = vertexData;
renderOperation.useIndices = true;
// Create a brand new private material
if ( !ResourceGroupManager.Instance.GetResourceGroups().Contains( "VolumeRendable" ) )
{
ResourceGroupManager.Instance.CreateResourceGroup( "VolumeRendable" );
}
Material material = (Material)MaterialManager.Instance.Create( texture, "VolumeRendable" );
// Remove pre-created technique from defaults
material.RemoveAllTechniques();
// Create a techinique and a pass and a texture unit
Technique technique = material.CreateTechnique();
Pass pass = technique.CreatePass();
TextureUnitState textureUnit = pass.CreateTextureUnitState();
// Set pass parameters
pass.SetSceneBlending( SceneBlendType.TransparentAlpha );
pass.DepthWrite = false;
pass.CullingMode = CullingMode.None;
pass.LightingEnabled = false;
textureUnit.SetTextureAddressingMode( TextureAddressing.Clamp );
textureUnit.SetTextureName( texture, TextureType.ThreeD );
textureUnit.SetTextureFiltering( TextureFiltering.Trilinear );
unit = textureUnit;
base.material = material;
}
}
