Microsoft.Xna.Framework.Graphics.EffectParameter.SetValue C# (CSharp) Method

        public void SetValue(Matrix value)
        {
            if (ParameterClass != EffectParameterClass.Matrix || ParameterType != EffectParameterType.Single)
                throw new InvalidCastException();

            // HLSL expects matrices to be transposed by default.
            // These unrolled loops do the transpose during assignment.
            if (RowCount == 4 && ColumnCount == 4)
            {
                var fData = (float[])Data;

                fData[0] = value.M11;
                fData[1] = value.M21;
                fData[2] = value.M31;
                fData[3] = value.M41;

                fData[4] = value.M12;
                fData[5] = value.M22;
                fData[6] = value.M32;
                fData[7] = value.M42;

                fData[8] = value.M13;
                fData[9] = value.M23;
                fData[10] = value.M33;
                fData[11] = value.M43;

                fData[12] = value.M14;
                fData[13] = value.M24;
                fData[14] = value.M34;
                fData[15] = value.M44;
            }
            else if (RowCount == 4 && ColumnCount == 3)
            {
                var fData = (float[])Data;

                fData[0] = value.M11;
                fData[1] = value.M21;
                fData[2] = value.M31;
                fData[3] = value.M41;

                fData[4] = value.M12;
                fData[5] = value.M22;
                fData[6] = value.M32;
                fData[7] = value.M42;

                fData[8] = value.M13;
                fData[9] = value.M23;
                fData[10] = value.M33;
                fData[11] = value.M43;
            }
            else if (RowCount == 3 && ColumnCount == 4)
            {
                var fData = (float[])Data;

                fData[0] = value.M11;
                fData[1] = value.M21;
                fData[2] = value.M31;

                fData[3] = value.M12;
                fData[4] = value.M22;
                fData[5] = value.M32;

                fData[6] = value.M13;
                fData[7] = value.M23;
                fData[8] = value.M33;

                fData[9] = value.M14;
                fData[10] = value.M24;
                fData[11] = value.M34;
            }
            else if (RowCount == 3 && ColumnCount == 3)
            {
                var fData = (float[])Data;

                fData[0] = value.M11;
                fData[1] = value.M21;
                fData[2] = value.M31;

                fData[3] = value.M12;
                fData[4] = value.M22;
                fData[5] = value.M32;

                fData[6] = value.M13;
                fData[7] = value.M23;
                fData[8] = value.M33;
            }
            else if (RowCount == 3 && ColumnCount == 2)
            {
                var fData = (float[])Data;

                fData[0] = value.M11;
                fData[1] = value.M21;
                fData[2] = value.M31;

                fData[3] = value.M12;
                fData[4] = value.M22;
                fData[5] = value.M32;
            }

            StateKey = unchecked(NextStateKey++);
        }

        /// <summary>
        /// Lazily recomputes the world inverse transpose matrix and
        /// eye position based on the current effect parameter settings.
        /// </summary>
        internal static EffectDirtyFlags SetLightingMatrices(EffectDirtyFlags dirtyFlags, ref Matrix world, ref Matrix view,
                                                             EffectParameter worldParam, EffectParameter worldInverseTransposeParam, EffectParameter eyePositionParam)
        {
            // Set the world and world inverse transpose matrices.
            if ((dirtyFlags & EffectDirtyFlags.World) != 0)
            {
                Matrix worldTranspose;
                Matrix worldInverseTranspose;

                Matrix.Invert(ref world, out worldTranspose);
                Matrix.Transpose(ref worldTranspose, out worldInverseTranspose);

                worldParam.SetValue(world);
                worldInverseTransposeParam.SetValue(worldInverseTranspose);

                dirtyFlags &= ~EffectDirtyFlags.World;
            }

            // Set the eye position.
            if ((dirtyFlags & EffectDirtyFlags.EyePosition) != 0)
            {
                Matrix viewInverse;

                Matrix.Invert(ref view, out viewInverse);

                eyePositionParam.SetValue(viewInverse.Translation);

                dirtyFlags &= ~EffectDirtyFlags.EyePosition;
            }

            return dirtyFlags;
        }