Clipping Planes

OpenGL OpenGL: Basic Coding
1

From the following bit of code:

double eqn[4] = {0.0, 1.0, 0.0, 0.0};
glClipPlane(GL_CLIP_PLANE0, eqn);
glEnable(GL_CLIP_PLANE0);

everything that is located below the plane y=0 gets clipped. So how do I clip everything above the plane y=0 ??

2

Originally posted by Rajveer:
[b]From the following bit of code:

double eqn[4] = {0.0, 1.0, 0.0, 0.0};
glClipPlane(GL_CLIP_PLANE0, eqn);
glEnable(GL_CLIP_PLANE0);

everything that is located below the plane y=0 gets clipped. So how do I clip everything above the plane y=0 ??[/b]

Try

double eqn[4] = {0.0, -1.0, 0.0, 0.0};

instead.