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Light on everything

Started by bballmitch Jan 31, 2006 at 1:48 AM 4 replies 750+ views

Original Post

Jan 31, 2006 at 1:48 AM

Im not exactly sure how to make ONE light that makes everything on screen light up?


     GLfloat mat_specular[]={0.5,0.5,0.5,1.0};              //Set the light...
     GLfloat light_position[]={0.0,0.0,10.0,1.0};          //If i want to add more lights later i can
     glClearColor (0.0,0.0,0.5,0.0);
     glShadeModel(GL_SMOOTH);
     glEnable(GL_DEPTH_TEST);
     glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, mat_specular);
     glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 8.0);
     glLightfv(GL_LIGHT0, GL_POSITION, light_position);
     glEnable(GL_LIGHTING);
     glEnable(GL_LIGHT0);
     glColorMaterial(GL_FRONT_AND_BACK, GL_DIFFUSE);

thats what my light 0 is right now. How would i alter it to make it so that the light looks like its coming from all directions and that it hits every object on screen?

dpadam450

Jan 31, 2006 at 1:56 AM

First, why would you want light coming from all over? Do you just mean a sunlight coming from one direction? You could make 4 directional lights coming from the z and x axis. Btw, you have your light as a positional light, not directional. Not sure if you knew that.

mrbastard

Jan 31, 2006 at 2:03 AM

From your description, it sounds like you actually want to turn lighting off.

b3rs3rk

Jan 31, 2006 at 3:52 AM

use this
GLfloat light_position[]={0.0,0.0,10.0,0.0};

the last component set to 0.0 makes your light global and omnidirectional. See the opengl guide for complete description.

cherryhouse

Jan 31, 2006 at 6:30 AM

I'm pretty sure he's just refering to ambient lighting.

[Edited by - cherryhouse on January 31, 2006 7:30:01 AM]

b3rs3rk

Jan 31, 2006 at 6:46 AM

oh. well... take a look at nehe's tutorial #7.

GLfloat LightAmbient[]= { 0.5f, 0.5f, 0.5f, 1.0f };
GLfloat LightDiffuse[]= { 1.0f, 1.0f, 1.0f, 1.0f };
glLightfv(GL_LIGHT0, GL_AMBIENT, LightAmbient);
glLightfv(GL_LIGHT0, GL_DIFFUSE, LightDiffuse);

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