@vs vs
in vec4 position;
in vec4 color0;
in vec4 uv;

out vec4 color;
out vec4 texcoord;

void main() {
    gl_Position = position;
    color = color0;
    texcoord = uv;
}
@end

@fs fs
in vec4 color;
in vec4 texcoord;

out vec4 frag_color;

layout(binding = 0) uniform texture2D tex;
layout(binding = 0) uniform sampler smp;

bool near(float a, float b) {
    return abs(a-b) < 0.01;
}

void main() {
    // if(near(texcoord.x, -4) && near(texcoord.y, -2)) {
    //     frag_color = color;
    // } else {
        frag_color = texture(sampler2D(tex, smp), texcoord.xy);
    // }
}
@end

@program triangle vs fs