• Advertisement


This topic is now archived and is closed to further replies.

Light Moving around object?

This topic is 5376 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Recommended Posts

Ok, I have been trying for a good week now to try to fix this light issue so please help if you can... I am trying to rotate an object, with the camera/lighting fixed in place, so that the object is always lit up. I set my lighting stuff up in the init() function: glShadeModel(GL_SMOOTH); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); //Lighting, Coloring and so forth... glLightfv(GL_LIGHT0, GL_AMBIENT, light0_ambient); glLightfv(GL_LIGHT0, GL_DIFFUSE, light0_diffuse); glLightfv(GL_LIGHT0, GL_SPECULAR, light0_specular); glLightf(GL_LIGHT0, GL_SPOT_CUTOFF, 180.0f); glEnable(GL_LIGHTING); glEnable(GL_LIGHT0); glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, 1); // Turn on automatic normalization for normal vectors glEnable(GL_NORMALIZE); glMaterialfv(GL_FRONT, GL_AMBIENT, bevel_mat_ambient); glMaterialfv(GL_FRONT, GL_SHININESS, bevel_mat_shininess); glMaterialfv(GL_FRONT, GL_SPECULAR, bevel_mat_specular); glMaterialfv(GL_FRONT, GL_DIFFUSE, bevel_mat_diffuse); glColorMaterial(GL_FRONT_AND_BACK, GL_DIFFUSE); glEnable(GL_COLOR_MATERIAL); The only glRotate I have is in the display function around the object I want to rotate. glPushMatrix(); //Color glColor3f(0.2f,0.5f,0.8f); //Rotation due to mouse.. glRotated(xangle,0.0,1.0,0.0); glRotated(yangle,1.0,0.0,0.0); //drawing routine displayObj(); glPopMatrix(); But when I run this you can see on the glutSolidSphere, for instance, that the light is moving around the object, because as I rotate it the "light spot" on the sphere changes position. . But I thought since the light is in init() and I have a glLoadIdentity() before it that this would not be the case??? Totally confused... ~tmwsiy

Share this post

Link to post
Share on other sites

  • Advertisement