shader_type canvas_item;


uniform sampler2D centerss;
uniform int cells;
/*
void fragment()
{
	vec3 centers[100];
	for (int i=0; i<centers.length(); i++)
	{
		centers[i] = vec3(0.0, 0.0, 0.0);
	}
	centers[1] = vec3(0.5, 0.25, 1.0);
	centers[2] = vec3(0.7, 0.5, 1.0);
	centers[3] = vec3(0.6, 0.8, 1.0);
	COLOR = vec4(0.0, 0.0, 0.0, 1.0);
	float influnce = 0.0;
	for (int i=0; i<centers.length(); i++)
	{
		float distance_to_center = distance(centers[i].xy / TEXTURE_PIXEL_SIZE, UV / TEXTURE_PIXEL_SIZE);
		influnce += (1.0 / distance_to_center) * centers[i].z;
	}
	if(influnce > 0.2)
	{
		COLOR = vec4(1.0);
	}
	else 
	{
		COLOR = vec4(0.0);
	}
}
*/
void fragment()
{
	COLOR = vec4(0.0, 0.0, 0.0, 1.0);//init texture
	vec4 centers[300];
	for(int i=0; i<300; i++)
	{
		centers[i] = vec4(0.0);
	}
	for(int i=0; i<cells; i++)
	{
		centers[i] = vec4(texture(centerss, vec2(float(i)/300.0, 0.5)).r, texture(centerss, vec2(float(i)/300.0, 0.5)).g, texture(centerss, vec2(float(i)/300.0, 0.5)).b, 1.0);
	}
	int team = 0;
	float influnce = 0.0;
	for (int i=0; i<centers.length(); i++)
	{
		float distance_to_center = distance(centers[i].xy / TEXTURE_PIXEL_SIZE, UV / TEXTURE_PIXEL_SIZE);
		influnce += (1.0 / distance_to_center) * centers[i].w;
		if(centers[i].z > 0.5) team+=1;
		else team -= 1;
	}
	if(influnce > 0.2)
	{
		if(team>0)
			COLOR = vec4(1.0, 0.0, 0.0, 1.0);
		else
			COLOR = vec4(0.0, 0.0, 1.0, 1.0);
	}
	else 
	{
		COLOR = vec4(0.0);
	}
}