#ifdef GL_ES
precision mediump float;
#endif

//// START C2 UNIFORMS HEADER ////

uniform sampler2D samplerBack;
uniform sampler2D samplerFront;
varying vec2 vTex;
uniform vec2 destStart;
uniform vec2 destEnd;
uniform float seconds;
uniform float pixelWidth;
uniform float pixelHeight;
vec2 iResolution = vec2( 1./pixelWidth, 1./pixelHeight);

//// END C2 HEADER ////



void main(void)
{
    vec2 texel = vec2(pixelWidth,pixelHeight);
    vec2 uv = vTex;

    vec2 center = .5-sqrt(2.)*vec2(50,-50)*texel;

	float shadow = .75+.25*texture2D(samplerFront,(uv-center)/.87+center).a;

    gl_FragColor = texture2D(samplerFront,uv)*vec4(vec3(shadow),1);
}