init

src/lib/shaders/glow.glsl

@@ -0,0 +1,20 @@
+extern Image glowImage;
+
+extern float glowTime;
+
+vec4 effect(vec4 color, Image texture, vec2 texture_coords, vec2 pixel_coords) {
+	vec3 glowInfo = Texel(glowImage, texture_coords).rgb;
+
+	if(glowInfo.r != glowInfo.g) {
+		float glowStrength = glowTime + glowInfo.b;
+		if(mod(glowStrength, 2.0) < 1.0) {
+			glowInfo.b = mod(glowStrength, 1.0);
+		} else {
+			glowInfo.b = 1.0 - mod(glowStrength, 1.0);
+		}
+
+		return Texel(texture, texture_coords) * (glowInfo.g + glowInfo.b * (glowInfo.r - glowInfo.g));
+	}
+	
+	return vec4(Texel(texture, texture_coords).rgb * glowInfo.r, 1.0);
+}