Material Properties

        GLfloat material_diffuse = { 1, 0, 0, 1 };
        GLfloat material_specular = { 1, 1, 1, 1 };
        GLfloat material_shininess = { 100 };
        glMaterialfv(GL_FRONT, GL_DIFFUSE, material_diffuse);
        glMaterialfv(GL_FRONT, GL_SPECULAR, material_specular);
        glMaterialfv(GL_FRONT, GL_SHININESS, material_shininess);

• A material can have separate diffuse color and specular color
  • Diffuse color is the "color" we tend to think of
  • Specular color is the color of highlights
  • Specular color tends to be white for plastics, same as diffuse color for metals
• An OpenGL material also has a "shininess" - determines width of specular peak
• Other fancy stuff settable with glMaterialfv, including separate color for front and back.
• Another possibility - glColorMaterial - lets you vary material parameters across the surface by calling glColor3f