I've got a question related to the current state (OS 10.3.6) of support
for OpenGL Shading Language.
I address this list since most driver providers do not provide drivers
for Apple hardware; that presumably is something which Apple is
responsible for.
I recently wrote a very simple openGL shader (vertex+fragment) and
successfully ran it (via JOGL, a Java binding for openGL) on a Linux
machine.
The same code running on my Mac G5 with OS < 10.3.6 crashed the Java
machine. However, when I updated to 10.3.6, things improved
considerably; I received very comprehensive "info log" messages (via
the glGetInfoLog() function); but the shader itself did not take
effect. There was no error message (that I could identify) tellling me
why.
So, ... I would be glad to hear from anyone who has experience using
openGL shading language under 10.3.6. Are there known problems? BTW, a
search of the Apple Developer site for "opengl shading language"
yielded no relevant results.
Charles Gunn
******
//For those interested, the source code for the shaders: sets fragment
color to gray scale proportional to
// z-coordinate of object coordinate:
// vertex shader
varying float foo;
void main()
{
foo = gl_Vertex[2];
gl_Position = ftransform();
}
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