atmos test code

void stestingApp::setup()
{
	mCam.lookAt(vec3(3, 2, 4), vec3(0));
	try {
		mGlsl = gl::GlslProg::create(gl::GlslProg::Format().vertex(loadAsset("sh.vert")).fragment(loadAsset("sh.frag")));
	}
	catch (gl::GlslProgCompileExc ex) {
		console() <<"Shader Creation failed: "<< ex.what() << endl;
		quit();
	}
	float sun = 100.0f;
	float kr = 0.01f;
	float km = 0.03f;
	float fpi = 4 * 3.14f;
	mGlsl->uniform("v3LightPosition", vec3(12, 10, -1));//v3
	mGlsl->uniform("v3InvWavelength", vec3(0.3, 0.7, 1.0));//1/pow(wl,4)
	mGlsl->uniform("cameraPosition", vec3(3,2,4));// camera's position
	mGlsl->uniform("fCameraHeight2", 4.3f);// fCameraHeight^2
	mGlsl->uniform("fOuterRadius", 20.0f);// The outer (atmosphere) radius
	mGlsl->uniform("fOuterRadius2", 400.0f);// fOuterRadius^2
	mGlsl->uniform("fInnerRadius", 10.0f);// The inner (planetary) radius
	mGlsl->uniform("fInnerRadius2", 100.0f);// fInnerRadius^2
	mGlsl->uniform("fKrESun", kr*sun);// Kr * ESun
	mGlsl->uniform("fKmESun", km*sun);// Km * ESun
	mGlsl->uniform("fKr4PI", kr*fpi);// Km * 4 * PI
	mGlsl->uniform("fKm4PI", km*fpi);// Km * 4 * PI
	mGlsl->uniform("fScale", 1.0f/(20-10));// 1 / (fOuterRadius - fInnerRadius)
	mGlsl->uniform("fScaleDepth", 10.0f);// The scale depth (i.e. the altitude at which the atmosphere's average density is found)
	mGlsl->uniform("fScaleOverScaleDepth", 0.01f);// fScale / fScaleDepth
//	mGlsl->uniform("v3LightDirection", vec3(1, 1, 0.1));

	mCube = gl::Batch::create(geom::Sphere(), mGlsl);
	gl::enableDepthWrite();
	gl::enableDepthRead();

}

void stestingApp::draw()
{
	gl::clear(Color(0.2f, 0.2f, 0.2f));
	gl::color(1, 0, 0);
	gl::setMatrices(mCam);
	mCube->draw();
}