example of the infinite far plane perspective matrix is
| 2*Near/(Right-Left) , 0, (Right+left)/(Right-Left),0
| * , *, * ,*
| * , *, * ,*
| * , *, * ,*
My question is why not write 0 instead of (Right+left)/(Right-Left)? Is the equation of Right=-Left is not always right in the perstective projection? The same happens to (Top+bottom)/(Top-bottom), Top should be equals to -bottom?