OpenGL School Project Arch simple rectangle with transparent half-circle need help ASAP

Posted on 2007-03-30
Medium Priority
Last Modified: 2013-12-21

The image above is essentially what I must draw with my openGL program.
This is for a school project, and I am not doing very well so if I mess this up I am resigned to a grim fate.
I'm pretty confident that I could handle everything *BUT* the notch in the block as simple as it looks. I know maybe this has something to do with transparency but I feel clueless right now. If anyone has any idea how I could do the notch in the block to make an 'arch' please let me know. I have only a few days left to figuere this out or I am dead meat.
Question by:lordvr
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Expert Comment

ID: 18854262
Does it have to use transparency?
It would seem simpler to just draw a polygon - defining the arc yourself; (with a little bit of pythag, that shouldn't be particularly difficult)..
LVL 25

Accepted Solution

InteractiveMind earned 2000 total points
ID: 18854277

float W=200, H=100, ar=50; // W is the width of the rectangle (which contains the arc),
                                              // H is the height of the rectangle (..)
                                              // ar is the radius of the arc
for(float i=ar; i>=-ar; i--)

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