karl2d/default_shader_fragment.glsl

#version 330
in vec2 frag_uv;
in vec4 frag_color;
out vec4 final_color;

uniform sampler2D tex;

void main()
{
    //vec4 c = texture(tex, frag_uv);
    //final_color = c * frag_color;
    final_color = vec4(frag_color.rgb + vec3(frag_uv.x*0.000001, 0, 0), 1);
}