duh, use the proper param name.
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@ -28,7 +28,7 @@ float calcPointlightOrSpotLight(vec3 v, vec3 n, vec4 lp, vec3 ln, float la, floa
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float da = clamp(1.0/(la * d), 0.0, 1.0);
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// spotlight coefficient.
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float spot = max(dot(-ln, lv), is_omnidirectional);
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float spot = max(dot(-ln, lv), is_pointlight);
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da *= spot*spot; // GL_SPOT_EXPONENT=2
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//angular attenuation
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