gistfile1.cpp

GLfloat LightPos[]			= { 10.0f, 0.0f,  0.0f, 1.0f};

void setupProjectionMatrix() {
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    glViewport(0,0,WindowWidth,WindowHeight);
    gluPerspective(FieldOfView, AspectRatio, NearPlane, FarPlane);

    glMatrixMode(GL_MODELVIEW);
}

void display() { // GL Display Func
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    
    glLoadIdentity(); // We're in MODELVIEW

    gluLookAt(0, 0, 10, 0, 0, 0, 0, 1, 0);

    glRotatef(-15, 1, 0, 0); // Put Camera Angle up toward the ceiling
    glTranslatef(0, -boundBoxMin.y / 2, 0); // Put Camera Position below the ceiling

    ceiling->draw(true, true, MaterialType == MATERIAL_TYPE_DESIGN); // Draw (with display lists, draw children, draw with individual materials)

    glutSwapBuffers();
}

void computeFrame() { // Ran while idle (at a somewhat constant rate, depends upon frame rate)
    ceiling->update();

    if (LEFT_Down) {
        LightAngle -= 2;
    }

    if (RIGHT_Down) {
        LightAngle += 2;
    }

    if (UP_Down) {
        LightHeight += .2;
    }

    if (DOWN_Down) {
        LightHeight -= .2;
    }

    LightAngle = MAX2(0, MIN2(360, LightAngle)); // Make light angle in range [0, 360]
    LightHeight = MAX2(-10, MIN2(2, LightHeight)); // Make light height in range [-10, 2]

    if (LEFT_Down || RIGHT_Down || UP_Down || DOWN_Down) {
        //cout << "Angle: " << LightAngle << " Height: " << LightHeight << endl; // This is displaying a properly updating height and angle
        glMatrixMode(GL_PROJECTION);
            glLoadIdentity();
            glTranslatef(0, LightHeight, 0);
            glRotatef(LightAngle, 0, 1, 0);
            glLightfv(GL_LIGHT0, GL_POSITION, LightPos);
        setupProjectionMatrix();
        glutPostRedisplay();
    }
}