glowygraph 0.8.0

A library for drawing glowy graphs
Documentation 
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#version 150

layout(points) in;
layout(triangle_strip, max_vertices = 3) out;

in vec4 ginner_color[1];
in vec4 gfalloff_color[1];
in float gfalloff[1];
in float gfalloff_radius[1];
in float ginner_radius[1];
out vec2 delta;
out vec4 finner_color;
out vec4 ffalloff_color;
out float finner_radius;
out float ffalloff_radius;
out float ffalloff;
uniform mat3 projection;

void main() {
    finner_color = ginner_color[0];
    ffalloff_color = ginner_color[0];
    finner_radius = ginner_radius[0];
    ffalloff = gfalloff[0];
    ffalloff_radius = gfalloff_radius[0];
    vec2 center = gl_in[0].gl_Position.xy;
    float full_radius = finner_radius + ffalloff_radius;

    delta = full_radius * vec2(0, 2);
    gl_Position = vec4((projection * vec3(center + delta, 1.0)).xy, 0.0, 1.0);
    EmitVertex();

    delta = full_radius * vec2(-1.7320508075689, -1);
    gl_Position = vec4((projection * vec3(center + delta, 1.0)).xy, 0.0, 1.0);
    EmitVertex();

    delta = full_radius * vec2(1.7320508075689, -1);
    gl_Position = vec4((projection * vec3(center + delta, 1.0)).xy, 0.0, 1.0);
    EmitVertex();
}