gistfile1.glsl

#ifdef GL_ES
precision mediump float;
#endif

uniform vec2 pointMain[225];
uniform int pointNumber;

float Blob(vec2 position, vec2 point, float radius)
{
	float temp = pow(position.x - point.x, 2.0) + pow(position.y - point.y, 2.0);
	float result = 0.0;
	if(temp < pow(radius, 2.0))
	{
		float distance = sqrt(pow(position.x - point.x, 2.0) + pow(position.y - point.y, 2.0)) / radius;
		result = pow((1.0 - pow(distance, 2.0)), 2.0);
	}
	return result;
}

void main(void)
{
	float PI = 3.141516;
	vec2 position = gl_FragCoord.xy / vec2(800, 600);
	float radius = 0.06;

	float blobValue = 0.0;
	for	(int i = 0; i < pointNumber; i++)
	{
		blobValue += Blob(position, pointMain[i], radius);
	}

	
	vec4 color = vec4(92 / 255.0, 186 / 255.0, 231 / 255.0, blobValue);
	
	gl_FragColor = color;
}