#version 450
#extension GL_ARB_separate_shader_objects : enable

layout(location = 0) in vec2 fragTexCoord;
layout(location = 1) in vec4 fragPos;
layout(location = 2) in vec4 fragColor;

layout(location = 0) out vec4 outColor;

layout(set = 2, binding = 0) uniform sampler2D atlas;

void main() {
    float sampled = texture(atlas, fragTexCoord).r;

    outColor = vec4(1, 1, 1, sampled) * fragColor;
}