#include <stdlib.h>
#include <zoom/light.h>
#include <GL/gl.h>


int nLights = 0;
LIGHT *lights;

static COLOR ambient;


static void UpdateAmbient() {
	glClearColor(ambient.r/(nLights+1), ambient.g/(nLights+1), ambient.b/(nLights+1), 1.0);
}

void SetAmbient(COLOR c) {
	ambient = c;
	
	UpdateAmbient();
}

void AddLight(LIGHT light) {
	if(nLights == 0)
		lights = malloc(sizeof(LIGHT));
	else
		lights = realloc(lights, sizeof(LIGHT)*(nLights+1));
	
	lights[nLights] = light;
	nLights++;
	
	UpdateAmbient();
}

void ResetLights() {
	if(nLights > 0) {
		free(lights);
		nLights = 0;
		UpdateAmbient();
	}
}

void ApplyLightScale() {
	glAccum(GL_LOAD, 1);
	glAccum(GL_RETURN, nLights+1);
}