#ifdef GL_ES
#define LOWP lowp
precision mediump float;
#else
#define LOWP
#endif

varying LOWP vec4 v_color;
varying vec2 v_texCoords;
varying vec4 glPos;

uniform sampler2D u_texture;

varying float v_radius;

void main(){
	float dist = distance(glPos.xy, v_texCoords.xy) / 1.0;

	gl_FragColor = texture2D(u_texture, v_texCoords.xy);
	gl_FragColor.rgb = v_color.rgb;
	float res = v_color.a * gl_FragColor.a;
	gl_FragColor.a = 1.0 * (1.0 - max(smoothstep(v_radius - 5.0 * res, v_radius , dist),
									  min(smoothstep(v_radius - 7.0 * res, v_radius - 12.0 * res, dist),
										  0.88)));
}