/// <summary>
/// Converts a Matrix4 object to a float[16] that contains the matrix
/// in top to bottom, left to right order.
/// i.e. glMatrix[0] = matrix[0,0]
/// glMatrix[1] = matrix[1,0]
/// etc...
/// </summary>
/// <param name="matrix"></param>
/// <returns></returns>
private void MakeGLMatrix(ref Matrix4 matrix, float[] floats)
{
Matrix4 mat = matrix.Transpose();
mat.MakeFloatArray(floats);
}
/// <summary>
/// Sends a multiple value constant floating-point parameter to the program.
/// </summary>
/// <remarks>
/// This method is made virtual to allow GpuProgramManagers, or even individual
/// GpuProgram implementations to supply their own implementation if need be.
/// An example would be where a Matrix needs to be transposed to row-major format
/// before passing to the hardware.
/// </remarks>
/// <param name="index">Index of the contant register.</param>
/// <param name="val">Structure containing 3 packed float values.</param>
public void SetConstant(int index, Matrix4 val)
{
Matrix4 mat;
// transpose the matrix if need be
if(transposeMatrices) {
mat = val.Transpose();
}
else {
mat = val;
}
// resize if necessary
if (index + 4 >= float4VecConstantsCount)
ResizeFloatConstants(index + 4);
floatIsSet[index + 0] = true;
floatIsSet[index + 1] = true;
floatIsSet[index + 2] = true;
floatIsSet[index + 3] = true;
if (index + 4 >= maxSetCount)
maxSetCount = index + 4;
int eltIndex = index * 4;
floatConstantsArray[eltIndex + 0] = mat.m00;
floatConstantsArray[eltIndex + 1] = mat.m01;
floatConstantsArray[eltIndex + 2] = mat.m02;
floatConstantsArray[eltIndex + 3] = mat.m03;
floatConstantsArray[eltIndex + 4] = mat.m10;
floatConstantsArray[eltIndex + 5] = mat.m11;
floatConstantsArray[eltIndex + 6] = mat.m12;
floatConstantsArray[eltIndex + 7] = mat.m13;
floatConstantsArray[eltIndex + 8] = mat.m20;
floatConstantsArray[eltIndex + 9] = mat.m21;
floatConstantsArray[eltIndex + 10] = mat.m22;
floatConstantsArray[eltIndex + 11] = mat.m23;
floatConstantsArray[eltIndex + 12] = mat.m30;
floatConstantsArray[eltIndex + 13] = mat.m31;
floatConstantsArray[eltIndex + 14] = mat.m32;
floatConstantsArray[eltIndex + 15] = mat.m33;
}
