#version 310 es
precision mediump float;
precision mediump int;

layout(location = 0) uniform float count;
layout(location = 0) in highp vec4 vertex;
layout(location = 0) out vec4 fragColor;

uniform mediump sampler2D tex;


bool isSomething(float x) {
	return x < 0.0;
}

void main() {
	vec4 c;
	float x = textureLod(tex, vertex.xy, 0.0).x;
	if (isSomething(x)) {
		c = vec4(1,0,0,1);
	} else {
		c = vec4(0,1,0,1);
	}
	fragColor = c;
}