Initial project import

node_modules/three-stdlib/shaders/HueSaturationShader.js

@@ -0,0 +1,60 @@
+const HueSaturationShader = {
+  uniforms: {
+    tDiffuse: { value: null },
+    hue: { value: 0 },
+    saturation: { value: 0 }
+  },
+  vertexShader: (
+    /* glsl */
+    `
+    varying vec2 vUv;
+
+    void main() {
+
+    	vUv = uv;
+
+    	gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
+
+    }
+  `
+  ),
+  fragmentShader: (
+    /* glsl */
+    `
+    uniform sampler2D tDiffuse;
+    uniform float hue;
+    uniform float saturation;
+
+    varying vec2 vUv;
+
+    void main() {
+
+    	gl_FragColor = texture2D( tDiffuse, vUv );
+
+    // hue
+    	float angle = hue * 3.14159265;
+    	float s = sin(angle), c = cos(angle);
+    	vec3 weights = (vec3(2.0 * c, -sqrt(3.0) * s - c, sqrt(3.0) * s - c) + 1.0) / 3.0;
+    	float len = length(gl_FragColor.rgb);
+    	gl_FragColor.rgb = vec3(
+    		dot(gl_FragColor.rgb, weights.xyz),
+    		dot(gl_FragColor.rgb, weights.zxy),
+    		dot(gl_FragColor.rgb, weights.yzx)
+    	);
+
+    // saturation
+    	float average = (gl_FragColor.r + gl_FragColor.g + gl_FragColor.b) / 3.0;
+    	if (saturation > 0.0) {
+    		gl_FragColor.rgb += (average - gl_FragColor.rgb) * (1.0 - 1.0 / (1.001 - saturation));
+    	} else {
+    		gl_FragColor.rgb += (average - gl_FragColor.rgb) * (-saturation);
+    	}
+
+    }
+  `
+  )
+};
+export {
+  HueSaturationShader
+};
+//# sourceMappingURL=HueSaturationShader.js.map