ShaderUse.cpp

Propane::Shader::Program myNewShader;
myNewShader.loadVertexShader("shader.vert");
myNewShader.loadFragmentShader("shader.frag");
// Make sure to compile. If your code doesn't work, that's probably why.
if(!myNewShader.compile()) {
        // Make sure to always check for this!
        std::cerr << "Info log: " << std::endl;
        std::cerr << myNewShader.getInfoLog();
        return 1;
}

bool done = false;
// A simple second timer value
float timer = 0.0f;
// Get a handle we can feed the timer's status into the shader from
GLint timerHandle = myNewShader.getUniformLocation("timer");

while(!done) {
        Propane::clearScreen();
        timer += Propane::getNewDelta();

        myNewShader.turnOn();
        myNewShader.passToUniform(timerHandle, timer);
        glBegin(GL_QUADS);
        // Draw a patchwork of quads
        for(int x = 0; x < 640; x += 64) {
                for(int y = 0; y < 480; y += 48) {
                        glColor3f(      Propane::Math::randomFloat(0,1),
                                        Propane::Math::randomFloat(0,1),
                                        Propane::Math::randomFloat(0,1));
                        glVertex2i(x,y);
                        glVertex2i(x + 64, y);
                        glVertex2i(x + 64, y + 64);
                        glVertex2i(x, y + 64);
                }
        }
        glEnd();
        myNewShader.turnOff();

        Propane::flip();
        Propane::delay(1);
}

---