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edges.geo
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edges.geo
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#version 330
layout (lines) in;
layout (line_strip, max_vertices = 2) out;
uniform sampler2D imageTexture;
uniform vec3 color;
uniform bool useExternalColor;
in vData
{
vec2 uv;
} v_in[];
out fData
{
vec3 color;
} g_out;
void main() {
int i;
vec3 averageColor = vec3(0,0,0);
for(i = 0; i < gl_in.length(); i++) {
vec4 tex = texture(imageTexture, v_in[i].uv).rgba;
if (useExternalColor) {
averageColor += mix(vec3(0), color, tex.a);
} else {
averageColor += mix(vec3(0), tex.rgb, tex.a);
}
}
averageColor /= float(gl_in.length());
for(i = 0; i < gl_in.length(); i++) {
gl_Position = gl_in[i].gl_Position;
g_out.color = averageColor;
EmitVertex();
}
EndPrimitive();
}