I’m working on a simple engine and recently i found this problem… The whole scene is lit dark (almost black) if the fog is off, and the light(s) is on. If I move near the objects, the objects become brighter. Here is the code i use for ligting…
// fog and light colors
float fogColor[3] = { 0.5f, 0.0f, 0.788f };
float Position[4] = { 0.0f, 10.0f, 15.0f, 0.0f };
float Ambient[4] = { 0.5f, 0.0f, 1.0f, 1.0f };
float Diffuse[4] = { 0.5f, 0.5f, 0.5f, 1.0f };
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// in the initialize function
// fog setup
glEnable(GL_FOG);
glFogfv(GL_FOG_COLOR, fogColor);
glFogi(GL_FOG_MODE, GL_LINEAR);
glFogf(GL_FOG_START, 8.0f);starts
glFogf(GL_FOG_END, 50.0f);
glFogf(GL_FOG_DENSITY, 2.0f);
// light0 setup
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glLightfv(GL_LIGHT0, GL_POSITION, lightPosition);
glLightfv(GL_LIGHT0, GL_AMBIENT, lightAmbient);
glLightfv(GL_LIGHT0, GL_DIFFUSE, lightDiffuse);
// enable color tracking
glEnable(GL_COLOR_MATERIAL);
glColorMaterial(GL_FRONT, GL_AMBIENT_AND_DIFFUSE);
Anyone knows what’s wrong?
here are some screenshots
http://i22.photobucket.com/albums/b317/bdeath2/fog_off_1big.jpg
This one shows what happenes if the fog is set off and the light is set to on (from the top)
http://i22.photobucket.com/albums/b317/bdeath2/fog_off_2big.jpg
Same as above, but near the walls
http://i22.photobucket.com/albums/b317/bdeath2/fog_on_big.jpg
This one shows the scene with light and fog turned on.