public void SetView(EOrthographicView view)
{
float rot90deg = (float)(Math.PI * 0.5);
switch (view)
{
case EOrthographicView.XY:
SetRotationMatrixAsXYPlane();
break;
case EOrthographicView.XZ: {
float[,] rotMatrix =
MathMatrix.CalcHomogeneousRotMatrix(-1 * rot90deg, 0, 0);
SetRotationMatrixAsXYPlane();
m_RotationMatrix = m_RotationMatrix.Multiply(rotMatrix);
}
break;
case EOrthographicView.YZ: {
float[,] rotMatrix =
MathMatrix.CalcHomogeneousRotMatrix(0, -1 * rot90deg, 0);
SetRotationMatrixAsXYPlane();
m_RotationMatrix = m_RotationMatrix.Multiply(rotMatrix);
}
break;
case EOrthographicView.Isometric: {
// Assume currently is XY plane, rotate to isometric position
// Rot X 45 deg
float thetaX = -1 * (float)(0.25 * Math.PI);
float thetaY = 0f;
// Then Rot Z 135 deg
float thetaZ = (float)(-135f / 180 * Math.PI);
float[,] rotMatrix = MathMatrix.CalcHomogeneousRotMatrix(thetaX, thetaY, thetaZ);
float[,] vec = new float[3, 1] {
{ (float)(1f / Math.Sqrt(3)) }, { (float)(1f / Math.Sqrt(3)) }, { (float)(1f / Math.Sqrt(3)) }
};
SetRotationMatrixAsXYPlane();
m_RotationMatrix = m_RotationMatrix.Multiply(rotMatrix);
}
break;
default:
// undone
break;
}
}
public void RotateView(float thetaX, float thetaY, float thetaZ)
{
float[,] rotMatrix = MathMatrix.CalcHomogeneousRotMatrix(thetaX, thetaY, thetaZ);
m_RotationMatrix = m_RotationMatrix.Multiply(rotMatrix);
}