Implemented I/O for new wall transparency and cleaned up some code.


git-svn-id: https://svn.code.sf.net/p/vpinball/code/trunk@1058 14438d79-0ffd-4333-8ae7-ea2bdd901387
don't set constant shader values every frame

git-svn-id: https://svn.code.sf.net/p/vpinball/code/trunk@1059 14438d79-0ffd-4333-8ae7-ea2bdd901387
aspect ration for ball fixed (hopefully)

git-svn-id: https://svn.code.sf.net/p/vpinball/code/trunk@1060 14438d79-0ffd-4333-8ae7-ea2bdd901387
Clamp opacity to 0..255.


git-svn-id: https://svn.code.sf.net/p/vpinball/code/trunk@1061 14438d79-0ffd-4333-8ae7-ea2bdd901387
Made dynamically rendered walls respect the "Visible" property.


git-svn-id: https://svn.code.sf.net/p/vpinball/code/trunk@1062 14438d79-0ffd-4333-8ae7-ea2bdd901387