precision mediump float;

layout (location = 0) uniform sampler2D sampler;
layout (location = 1) uniform vec3 light_color;
layout (location = 2) uniform vec2 size;
layout (location = 3) uniform vec2 center_fragcoord;
layout (location = 4) uniform vec2 center_clip;
layout (location = 5) uniform float range;
layout (location = 6) uniform uint mode;
layout (location = 7) uniform uint falloff;

//layout (location = 0) out vec2 frag_texcoords;
//layout (location = 1) flat out vec2 frag_light_coord;

layout (location = 0) in vec3 position;

void main() {
    vec2 pos = position.xy;
    if (mode == 0)
    {
        vec2 dir = pos - center_clip;
        float len = length(dir);
        if (len > 1e-6)
        {
            vec2 dir_norm = dir * (1/len);
            pos += dir_norm * position.z * 4;
        }
    }
    gl_Position = vec4(pos, 0, 1);
}