gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex; gl_TexCoord[0] = gl_MultiTexCoord0;

gl_ModelViewProjectionMatrix , gl_Vertex , gl_MultiTexCoord0 are built-in fixed-function legacy variables. Modern OpenGL (3.0+) replaces these with user-defined uniforms and attributes. 6. Hardware Requirements & Adoption | Feature | Minimum GPU Support | |---------|---------------------| | GLSL | Shader Model 2.0 (DirectX 9) | | NPOT Textures | GeForce FX (2003), Radeon 9500+ (2002) | | MRT | Radeon X800, GeForce 6800 |

gl_FragColor = texture2D(myTexture, gl_TexCoord[0].xy);