attribute float cameraPosX;
attribute float cameraPosY;
attribute float cameraPosZ;

varying vec4	MCvertex;

varying float sphIndex;


void main()
{

	vec3 cartesian;
	vec3 spherical;
	
	gl_Position = ftransform();
	vec3 v = gl_Position.xyz;
	
	vec3 cameraPos;
	cameraPos.x = cameraPosX;
	cameraPos.y = cameraPosY;
	cameraPos.z = cameraPosZ;
	
	vec3 cameraDir = normalize(v - cameraPos);
	
	spherical.x = 1.0;
	spherical.y = acos(cameraDir.z / 
						sqrt(cameraDir.x*cameraDir.x + 
								cameraDir.y*cameraDir.y + 
								cameraDir.z*cameraDir.z));
	spherical.y = spherical.y * 180.0 / 3.14159265;
	
	spherical.z = atan(cameraDir.y, sqrt(cameraDir.x*cameraDir.x + cameraDir.y*cameraDir.y));
	spherical.z = spherical.z * 180.0 / 3.14159265;

	
	sphIndex = (spherical.y*180.0 + spherical.z) / (180.0*180.0);

	gl_TexCoord[0] = gl_MultiTexCoord0;
}