precision mediump float;
varying vec4 color;
varying vec3 position;

uniform vec4 lineParams;

void main() 
{
	float a = lineParams.x;
	float b = lineParams.y;
	float c = lineParams.z;

	float distance = abs(a*position.x + b*position.y + c);
	
	gl_FragColor = vec4(color.rgb, color.a*clamp(1.2 / (distance + 1.0) - 0.5, 0.0, 1.0));
}