GL_CLIP_PLANE not working
My OpenGL clipping plane doesn't work--can anyone tell me what I am doing wrong? here is my code:
Code:
double eqr[] = {0.0f, -1.0f, 0.0f, 0.0f}; // clip plane equation
glLoadIdentity(); // reset the view
glTranslatef(0.0f, -0.6f, zoom); // move down a bit and back by the value in zoom
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glEnable(GL_CLIP_PLANE0); // enable clipping
glClipPlane(GL_CLIP_PLANE0, eqr); // tell opengl where we want to clip
glPushMatrix(); // push the matrix
glScalef(1.0f, -1.0f, 1.0f); // mirror everthing (it's supposed to be a reflection, after all)
glLightfv(GL_LIGHT0, GL_POSITION, light_pos); // set up light 0
glTranslatef(0.0f, height, 0.0f); // move to where we want to draw the ball (opposite, because it's mirrored)
glRotatef(xrot, 1.0f, 0.0f, 0.0f); // rotate on the x axis
glRotatef(yrot, 0.0f, 1.0f, 0.0f); // rotate on the y axis
draw_object(); // now draw the ball
glPopMatrix(); // pop the matrix
glDisable(GL_CLIP_PLANE0); // disable clipping
glDisable(GL_STENCIL_TEST); // turn off the stencil buffer
The idea is to draw a hovering ball above a floor, and, using the stencil buffer, draw a reflection of the ball. draw_object() draws the ball. It's supposed to clip to keep the reflection on the floor like an accurate reflection would :). Everthing works, except the clipping. (I'm not sure if my picture attachment will come through or not)
