public PO Map_to_Space(int x, int y)
{
util u1 = new util();
unsafe
{
double *modelview = stackalloc double[16];
double *projection = stackalloc double[16];
int * viewport = stackalloc int[4];
PO pf;
double z;
pf = new PO();
GLU.glGetDoublev(GLU.GL_MODELVIEW_MATRIX, modelview);
GLU.glGetDoublev(GLU.GL_PROJECTION_MATRIX, projection);
GLU.glGetIntegerv(GLU.GL_VIEWPORT, viewport);
GLU.glReadPixels(x, y, 1, 1, GLU.GL_DEPTH_COMPONENT, GLU.GL_FLOAT, &z);
double world_x, world_y, world_z;
GLU.gluUnProject((double)x, (double)(viewport[3] - y - 1), 1,
modelview, projection, viewport,
&world_x, &world_y, &world_z);
pf.x = (float)world_x;
pf.y = (float)world_y;
pf.z = 0;
return(pf);
}
}