Initial project import

node_modules/three-stdlib/shaders/FresnelShader.js

@@ -0,0 +1,68 @@
+const FresnelShader = {
+  uniforms: {
+    mRefractionRatio: { value: 1.02 },
+    mFresnelBias: { value: 0.1 },
+    mFresnelPower: { value: 2 },
+    mFresnelScale: { value: 1 },
+    tCube: { value: null }
+  },
+  vertexShader: (
+    /* glsl */
+    `
+    uniform float mRefractionRatio;
+    uniform float mFresnelBias;
+    uniform float mFresnelScale;
+    uniform float mFresnelPower;
+
+    varying vec3 vReflect;
+    varying vec3 vRefract[3];
+    varying float vReflectionFactor;
+
+    void main() {
+
+    	vec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );
+    	vec4 worldPosition = modelMatrix * vec4( position, 1.0 );
+
+    	vec3 worldNormal = normalize( mat3( modelMatrix[0].xyz, modelMatrix[1].xyz, modelMatrix[2].xyz ) * normal );
+
+    	vec3 I = worldPosition.xyz - cameraPosition;
+
+    	vReflect = reflect( I, worldNormal );
+    	vRefract[0] = refract( normalize( I ), worldNormal, mRefractionRatio );
+    	vRefract[1] = refract( normalize( I ), worldNormal, mRefractionRatio * 0.99 );
+    	vRefract[2] = refract( normalize( I ), worldNormal, mRefractionRatio * 0.98 );
+    	vReflectionFactor = mFresnelBias + mFresnelScale * pow( 1.0 + dot( normalize( I ), worldNormal ), mFresnelPower );
+
+    	gl_Position = projectionMatrix * mvPosition;
+
+    }
+  `
+  ),
+  fragmentShader: (
+    /* glsl */
+    `
+    uniform samplerCube tCube;
+
+    varying vec3 vReflect;
+    varying vec3 vRefract[3];
+    varying float vReflectionFactor;
+
+    void main() {
+
+    	vec4 reflectedColor = textureCube( tCube, vec3( -vReflect.x, vReflect.yz ) );
+    	vec4 refractedColor = vec4( 1.0 );
+
+    	refractedColor.r = textureCube( tCube, vec3( -vRefract[0].x, vRefract[0].yz ) ).r;
+    	refractedColor.g = textureCube( tCube, vec3( -vRefract[1].x, vRefract[1].yz ) ).g;
+    	refractedColor.b = textureCube( tCube, vec3( -vRefract[2].x, vRefract[2].yz ) ).b;
+
+    	gl_FragColor = mix( refractedColor, reflectedColor, clamp( vReflectionFactor, 0.0, 1.0 ) );
+
+    }
+  `
+  )
+};
+export {
+  FresnelShader
+};
+//# sourceMappingURL=FresnelShader.js.map