02/06/2003
15-462 Graphics I
16
Spotlights
•Create
point source as before
•Specify
additional properties to create spotlight
•[Demo: Lighting
Position Tutor]
GLfloat sd[] = {-1.0, -1.0, 0.0};
glLightfv(GL_LIGHT0, GL_SPOT_DIRECTION, sd);
glLightf(GL_LIGHT0, GL_SPOT_CUTOFF, 45.0);
glLightf(GL_LIGHT0, GL_SPOT_EXPONENT, 2.0);