test.geom

#version 330
layout(lines) in;
layout(triangle_strip, max_vertices = 4) out;
// dependant type declarations
// Julia name: Geom2Fragment
struct Geom2Fragment{
    float thickness;
    vec4 color;
    vec2 uv;
};

// Julia name: Uniforms
struct Uniforms{
    mat4 model;
    int max_primtives;
    float maxlength;
    float thickness;
    float pattern_length;
};

// Julia name: Canvas
struct Canvas{
    vec2 resolution;
    mat4 projection;
    mat4 view;
    mat4 projectionview;
};


// Julia name: Vert2Geom
struct Vert2Geom{
    vec4 position;
    vec4 color;
    float thickness;
};

in Vert2Geom geom_in[];
out Geom2Fragment geom_out;
// uniform inputs:
layout (std140) uniform _gensymed_UniformArg1{
    Canvas canvas;
};

layout (std140) uniform _gensymed_UniformArg2{
    Uniforms uniforms;
};

// dependant function declarations
void emit_vertex2(Vert2Geom[2] geom_in, Canvas canvas, Uniforms uniforms, vec2 position, vec2 uv, int index)
{
    Geom2Fragment fragout;
    vec4 outpos;
    vec4 inpos;
    inpos = geom_in[index - 1].position;
    outpos = vec4((position / canvas.resolution) * inpos.w, inpos.z, inpos.w);
    fragout = Geom2Fragment(geom_in[index - 1].thickness + 2.0, geom_in[index - 1].color, uv);
    gl_Position = outpos;
    geom_out = fragout;
    EmitVertex();
}
vec2 screen_space(vec4 vertex, Canvas canvas)
{
    return (vertex.xy / vertex.w) * canvas.resolution;
}

// geometry main function:
void main()
{
    float uv1;
    float uv0;
    float l;
    vec2 n0;
    vec2 v0;
    vec2 vun0;
    float thickness_aa1;
    float thickness_aa0;
    vec2 p1;
    vec2 p0;
    p0 = screen_space(geom_in[0].position, canvas);
    p1 = screen_space(geom_in[1].position, canvas);
    thickness_aa0 = geom_in[0].thickness + 2.0;
    thickness_aa1 = geom_in[1].thickness + 2.0;
    vun0 = p1 - p0;
    v0 = normalize(vun0);
    n0 = vec2(-(v0.y), v0.x);
    l = length(p1 - p0);
    l = l / (uniforms.pattern_length * 10.0);
    uv0 = thickness_aa0 / geom_in[0].thickness;
    uv1 = thickness_aa1 / geom_in[1].thickness;
    emit_vertex2(geom_in, canvas, uniforms, p0 + thickness_aa0 * n0, vec2(0, -uv0), 1);
    emit_vertex2(geom_in, canvas, uniforms, p0 - thickness_aa0 * n0, vec2(0, uv0), 1);
    emit_vertex2(geom_in, canvas, uniforms, p1 + thickness_aa1 * n0, vec2(l, -uv1), 2);
    emit_vertex2(geom_in, canvas, uniforms, p1 - thickness_aa1 * n0, vec2(l, uv1), 2);
    EndPrimitive();
}