Greetings friends, I have run into a stumbling block and I look to this community for help. I was very excited to build a game that works with Metal, I just hope I can get past this stumbling block.
How do I do this in Metal? I have tried Scissor rects, and nothing seems to clip. I, however, would like to TRANSFORM 4 clipping planes to work with model view and projection matrices. I have tried ViewPort and ScissorRect. I have never seen any clipping work. If I set the scissor rect to (100, 100, 100, 100) and draw a full-screen image, the image still occupies the whole screen.
Also, is there a way to enable / disable clipping / scissor rect. Ultimately, this is cool, I am having fun with Metal.
OpenGL code:
void Graphics::Clip(float pX, float pY, float pWidth, float pHeight) {
cClipPlane[0][0] = 0.0f;
cClipPlane[0][1] = 1.0f;
cClipPlane[0][2] = 0.0f;
cClipPlane[0][3] = 0.0f;
cClipPlane[1][0] = 1.0f;
cClipPlane[1][1] = 0.0f;
cClipPlane[1][2] = 0.0f;
cClipPlane[1][3] = 0.0f;
cClipPlane[2][0] = -1.0f;
cClipPlane[2][1] = 0.0f;
cClipPlane[2][2] = 0.0f;
cClipPlane[2][3] = pWidth;
cClipPlane[3][0] = 0.0f;
cClipPlane[3][1] = -1.0f;
cClipPlane[3][2] = 0.0f;
cClipPlane[3][3] = pHeight;
glClipPlane(GL_CLIP_PLANE0, cClipPlane[0]);
glClipPlane(GL_CLIP_PLANE1, cClipPlane[1]);
glClipPlane(GL_CLIP_PLANE2, cClipPlane[2]);
glClipPlane(GL_CLIP_PLANE3, cClipPlane[3]);
}
MTLViewport aViewPort = {
pX, pY, pWidth, pHeight, -1024.0f, 1024.0f
};
[gMetalEngine.renderCommandEncoder setViewport: aViewPort];
MTLScissorRect aScissor = {
pX, pY, pWidth, pHeight
};
[gMetalEngine.renderCommandEncoder setScissorRect: aScissor];
Thanks,
Nick Raptis
