02/06/2003
15-462 Graphics I
15
Point Source vs Directional Source
•Directional
light given by “position” vector
•Point
source given by “position” point
GLfloat light_position[] = {-1.0, 1.0, -1.0,
0.0};
glLightfv(GL_LIGHT0, GL_POSITION, light_position);
GLfloat light_position[] = {-1.0, 1.0, -1.0,
1.0};
glLightfv(GL_LIGHT0, GL_POSITION, light_position);