Initial project import

node_modules/three-stdlib/objects/GroundProjectedEnv.cjs

@@ -0,0 +1,136 @@
+"use strict";
+Object.defineProperty(exports, Symbol.toStringTag, { value: "Module" });
+const THREE = require("three");
+const constants = require("../_polyfill/constants.cjs");
+const isCubeTexture = (def) => def && def.isCubeTexture;
+class GroundProjectedEnv extends THREE.Mesh {
+  constructor(texture, options) {
+    var _a, _b;
+    const isCubeMap = isCubeTexture(texture);
+    const w = (_b = isCubeMap ? (_a = texture.image[0]) == null ? void 0 : _a.width : texture.image.width) != null ? _b : 1024;
+    const cubeSize = w / 4;
+    const _lodMax = Math.floor(Math.log2(cubeSize));
+    const _cubeSize = Math.pow(2, _lodMax);
+    const width = 3 * Math.max(_cubeSize, 16 * 7);
+    const height = 4 * _cubeSize;
+    const defines = [
+      isCubeMap ? "#define ENVMAP_TYPE_CUBE" : "",
+      `#define CUBEUV_TEXEL_WIDTH ${1 / width}`,
+      `#define CUBEUV_TEXEL_HEIGHT ${1 / height}`,
+      `#define CUBEUV_MAX_MIP ${_lodMax}.0`
+    ];
+    const vertexShader = (
+      /* glsl */
+      `
+        varying vec3 vWorldPosition;
+        void main() 
+        {
+            vec4 worldPosition = ( modelMatrix * vec4( position, 1.0 ) );
+            vWorldPosition = worldPosition.xyz;
+            
+            gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
+        }
+        `
+    );
+    const fragmentShader = defines.join("\n") + /* glsl */
+    `
+        #define ENVMAP_TYPE_CUBE_UV
+        varying vec3 vWorldPosition;
+        uniform float radius;
+        uniform float height;
+        uniform float angle;
+        #ifdef ENVMAP_TYPE_CUBE
+            uniform samplerCube map;
+        #else
+            uniform sampler2D map;
+        #endif
+        // From: https://www.shadertoy.com/view/4tsBD7
+        float diskIntersectWithBackFaceCulling( vec3 ro, vec3 rd, vec3 c, vec3 n, float r ) 
+        {
+            float d = dot ( rd, n );
+            
+            if( d > 0.0 ) { return 1e6; }
+            
+            vec3  o = ro - c;
+            float t = - dot( n, o ) / d;
+            vec3  q = o + rd * t;
+            
+            return ( dot( q, q ) < r * r ) ? t : 1e6;
+        }
+        // From: https://www.iquilezles.org/www/articles/intersectors/intersectors.htm
+        float sphereIntersect( vec3 ro, vec3 rd, vec3 ce, float ra ) 
+        {
+            vec3 oc = ro - ce;
+            float b = dot( oc, rd );
+            float c = dot( oc, oc ) - ra * ra;
+            float h = b * b - c;
+            
+            if( h < 0.0 ) { return -1.0; }
+            
+            h = sqrt( h );
+            
+            return - b + h;
+        }
+        vec3 project() 
+        {
+            vec3 p = normalize( vWorldPosition );
+            vec3 camPos = cameraPosition;
+            camPos.y -= height;
+            float intersection = sphereIntersect( camPos, p, vec3( 0.0 ), radius );
+            if( intersection > 0.0 ) {
+                
+                vec3 h = vec3( 0.0, - height, 0.0 );
+                float intersection2 = diskIntersectWithBackFaceCulling( camPos, p, h, vec3( 0.0, 1.0, 0.0 ), radius );
+                p = ( camPos + min( intersection, intersection2 ) * p ) / radius;
+            } else {
+                p = vec3( 0.0, 1.0, 0.0 );
+            }
+            return p;
+        }
+        #include <common>
+        #include <cube_uv_reflection_fragment>
+        void main() 
+        {
+            vec3 projectedWorldPosition = project();
+            
+            #ifdef ENVMAP_TYPE_CUBE
+                vec3 outcolor = textureCube( map, projectedWorldPosition ).rgb;
+            #else
+                vec3 direction = normalize( projectedWorldPosition );
+                vec2 uv = equirectUv( direction );
+                vec3 outcolor = texture2D( map, uv ).rgb;
+            #endif
+            gl_FragColor = vec4( outcolor, 1.0 );
+            #include <tonemapping_fragment>
+            #include <${constants.version >= 154 ? "colorspace_fragment" : "encodings_fragment"}>
+        }
+        `;
+    const uniforms = {
+      map: { value: texture },
+      height: { value: (options == null ? void 0 : options.height) || 15 },
+      radius: { value: (options == null ? void 0 : options.radius) || 100 }
+    };
+    const geometry = new THREE.IcosahedronGeometry(1, 16);
+    const material = new THREE.ShaderMaterial({
+      uniforms,
+      fragmentShader,
+      vertexShader,
+      side: THREE.DoubleSide
+    });
+    super(geometry, material);
+  }
+  set radius(radius) {
+    this.material.uniforms.radius.value = radius;
+  }
+  get radius() {
+    return this.material.uniforms.radius.value;
+  }
+  set height(height) {
+    this.material.uniforms.height.value = height;
+  }
+  get height() {
+    return this.material.uniforms.height.value;
+  }
+}
+exports.GroundProjectedEnv = GroundProjectedEnv;
+//# sourceMappingURL=GroundProjectedEnv.cjs.map