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AMBIENT AND SPOT LIGHT IN OPENGL

Hi,

Actually i have done a program will have a a room(Where all the walls are a 10 X 10 grid).And actually implemented a ambient light.but when i runt the program i can see that only the 1 wall changes color.

And anybody tell me how should i use spot light and what are the steps i need to use.And how to bring shining to the surface.

Regards
Hari

_corey_

Are the walls textured at all? Also, did you set the material values (ambient/diffuse/etc) for those objects?

corey

srihari1986

ASKER

Yes my walls are textured.What are the values we need to set for ambient and spot light.Below is the code o have done for the ambient light.The ambient light actually works only on the wall that has no texture.

// method to setup the lighting
void set_light ( void)
{

       // controlling the ambient light
       GLfloat ambientVal;
       if(!nightMode)
              ambientVal = 2.0;
       else
              ambientVal = 0.2;

       GLfloat lmodel_ambient[] = {ambientVal,ambientVal,ambientVal, 1.0 };
       glClearColor(0.0,0.0,0.0,1.0);
       glShadeModel(GL_SMOOTH);

// enable ambient light
       glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);

       glLightModeli ( GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE );
glLightModeli ( GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE );

// enable all the lighting
       glEnable ( GL_LIGHTING ); // ambient
       glEnable (GL_DEPTH_TEST);
       glEnable(GL_COLOR_MATERIAL); // to enable proper transparency and color after the lighting
}

Regards
Hari

guitaristx

I'd recommend keeping a browser window open to:
http://rush3d.com/reference/opengl-redbook-1.1/
Whenever you're doing OpenGL programming. The chapter on lighting (#6) is probably going to be most helpful to you. Can you post a bit more code, specifically, your draw function?

_corey_

I've been away with work, I'll try to answer your question soon.

corey

ASKER CERTIFIED SOLUTION

_corey_

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