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CompForm Assignment 10 · posted by vaibhav bhawsar Dec 31, 2007

Problem 1. Add the OpenGL lighting code to your project. This code may be placed in the init() function or in the displayFunc(), if you want to move or change the light.

void init ( GLvoid )
{
	glShadeModel( GL_SMOOTH );
	glClearColor( 0.1, 0.1, 0.1, 1.0 );
	glEnable ( GL_COLOR_MATERIAL );
	glEnable( GL_BLEND );
	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
	glEnable(GL_DEPTH_TEST);
	//turn on GL lighting
	glEnable(GL_LIGHTING);
	// turn on first light
	glEnable(GL_LIGHT0);
	//setup lighting params
	float ambientLight[4] = { 0, 0, 0, 1.0 };		//r,g,b,a //omni
	float diffuseLight[4] = { 1, 1, 1, 1.0 };		//r,g,b,a //color of the light bulb
	float specularLight[4] = { 0.8, 0.8, 0.8, 1.0 };	//r,g,b,a //the shiny part of the object
	float lightPosition[4] = { 500, 500, 1000, 1.0 };	//x,y,z,other //pos of the light
	//which light, property, propoertyvalue
	glLightfv(GL_LIGHT0,GL_AMBIENT,ambientLight);
	glLightfv(GL_LIGHT0,GL_DIFFUSE,diffuseLight);
	glLightfv(GL_LIGHT0,GL_SPECULAR,specularLight);
	glLightfv(GL_LIGHT0,GL_POSITION,lightPosition);
	//enable glColor3f to affect the material color
glEnable(GL_COLOR_MATERIAL);
glColorMaterial(GL_FRONT_AND_BACK,GL_AMBIENT_AND_DIFFUSE);	
}