Loading the Game Scene - WebGL Game Development - page 109

We also have modified the setLightUniform() function to initialize our light
objects and added each light to our lights object. We then initialized our uniforms'
variable, which is returned from lights.getDataByType , with single dimensional
arrays. In the following code, the WebGL function we used to initialize the uniforms
is gl.uniform3fv . The following is the code for the setLightUniform() function:
function setLightUniform(){
var light=new Light();
light.ambientColor=[0.1,0.1,0.1];
light.diffuseColor=[0.5,0.5,0.5];
light.specularColor=[1.0,1.0,1.0];
light.direction=[0,-1.25,-1.25];
var light1=new Light();
light1.diffuseColor=[lightColor[0],lightColor[1],
lightColor[2]];
light1.specularColor=[0.0,0.0,0.0];
light1.position=[20.0,5.0,-100.0];
var light2=new Light();
light2.diffuseColor= [1.0,1.0,1.0];
light2.specularColor=[0.0,0.0,0.0];
light2.position=[20.0,5.0,200.0];
var lights=new Lights();
lights.addLight(light);
lights.addLight(light1);
lights.addLight(light2);
gl.uniform3fv(shaderProgram.uAmbientColor,
lights.getDataByType("ambientColor"));
gl.uniform3fv(shaderProgram.uDirectionalDiffuseColor,
lights.getDataByType("diffuseColor","direction"));
gl.uniform3fv(shaderProgram.uDirectionalSpecularColor,
lights.getDataByType("specularColor","direction"));
gl.uniform3fv(shaderProgram.uPositionalDiffuseColor,
lights.getDataByType("diffuseColor","position"));
gl.uniform3fv(shaderProgram.uPositionalSpecularColor,
lights.getDataByType("specularColor","position"));
gl.uniform3fv(shaderProgram.uLightPosition,
lights.getDataByType("position"));
gl.uniform3fv(shaderProgram.uLightDirection,
lights.getDataByType("direction"));
}