#define SHADER_NAME PHASER_POINTLIGHT_FS

precision mediump float;

uniform vec2 uResolution;
uniform float uCameraZoom;

varying vec4 lightPosition;
varying vec4 lightColor;
varying float lightRadius;
varying float lightAttenuation;

void main ()
{
    vec2 center = (lightPosition.xy + 1.0) * (uResolution.xy * 0.5);

    float distToSurf = length(center - gl_FragCoord.xy);

    float radius = 1.0 - distToSurf / (lightRadius * uCameraZoom);

    float intensity = smoothstep(0.0, 1.0, radius * lightAttenuation);

    vec4 color = vec4(intensity, intensity, intensity, 0.0) * lightColor;

    gl_FragColor = vec4(color.rgb * lightColor.a, color.a);
}