Function WorldToClient

trunk/win/Source/BT_Util.cpp:6995–7025

}

Vec3 WorldToClient(Vec3 p, bool reverseY, bool zeroZ)
{
	// we hit this function a lot, so to save on the calls, we will locally use the singleton
	Camera * camera = cam;
	// TODO world2window should be replaced by this
#ifdef DXRENDER
	D3DXVECTOR3 window;
	D3DXVec3TransformCoord(&window, (const D3DXVECTOR3 *)&p, &dxr->viewProj);
	window.x = (window.x + 1) / 2 * dxr->viewport.Width + dxr->viewport.X;
	if (reverseY)
		window.y = -window.y;
	window.y = (window.y + 1) / 2 * dxr->viewport.Height + dxr->viewport.Y;
	if (zeroZ)
		window.z = 0;
	return Vec3(window.x, window.y, window.z);
#else
	GLdouble wx = 0.0, wy = 0.0, wz = 0.0;  //  returned world x, y, z coords
	float realy;

	GLint * viewport = camera->glViewport();
	GLdouble * projmatrix = camera->glProjectionMatrix();
	GLdouble * mvmatrix = camera->glModelViewMatrix();
	// note viewport[3] is height of window in pixels
	gluProject (p.x, p.y, p.z, mvmatrix, projmatrix, viewport, &wx, &wy, &wz);

	realy = float(reverseY ? viewport[3] - int(wy) - 1 : int(wy));

	if(zeroZ) wz=0;
	return Vec3(float(wx),realy,float(wz));
#endif
}

//Returns what the mouse cursor translates too in world coordinates.  Default is on the floor.  Set yValue to a different world Space number to get a different point on the ray
Vec3 CurrentWorldMousePos()