{"version":3,"file":"Water2.cjs","sources":["../../src/objects/Water2.js"],"sourcesContent":["import {\n Clock,\n Color,\n Matrix4,\n Mesh,\n RepeatWrapping,\n ShaderMaterial,\n UniformsLib,\n UniformsUtils,\n Vector2,\n Vector4,\n} from 'three'\nimport { Reflector } from './Reflector'\nimport { Refractor } from './Refractor'\nimport { version } from '../_polyfill/constants'\n\n/**\n * References:\n *\thttp://www.valvesoftware.com/publications/2010/siggraph2010_vlachos_waterflow.pdf\n * \thttp://graphicsrunner.blogspot.de/2010/08/water-using-flow-maps.html\n *\n */\n\nclass Water2 extends Mesh {\n static WaterShader = {\n uniforms: {\n color: {\n value: null,\n },\n\n reflectivity: {\n value: 0,\n },\n\n tReflectionMap: {\n value: null,\n },\n\n tRefractionMap: {\n value: null,\n },\n\n tNormalMap0: {\n value: null,\n },\n\n tNormalMap1: {\n value: null,\n },\n\n textureMatrix: {\n value: null,\n },\n\n config: {\n value: new Vector4(),\n },\n },\n\n vertexShader: /* glsl */ `\n\n\t\t#include \n\t\t#include \n\t\t#include \n\n\t\tuniform mat4 textureMatrix;\n\n\t\tvarying vec4 vCoord;\n\t\tvarying vec2 vUv;\n\t\tvarying vec3 vToEye;\n\n\t\tvoid main() {\n\n\t\t\tvUv = uv;\n\t\t\tvCoord = textureMatrix * vec4( position, 1.0 );\n\n\t\t\tvec4 worldPosition = modelMatrix * vec4( position, 1.0 );\n\t\t\tvToEye = cameraPosition - worldPosition.xyz;\n\n\t\t\tvec4 mvPosition = viewMatrix * worldPosition; // used in fog_vertex\n\t\t\tgl_Position = projectionMatrix * mvPosition;\n\n\t\t\t#include \n\t\t\t#include \n\n\t\t}`,\n\n fragmentShader: /* glsl */ `\n\n\t\t#include \n\t\t#include \n\t\t#include \n\n\t\tuniform sampler2D tReflectionMap;\n\t\tuniform sampler2D tRefractionMap;\n\t\tuniform sampler2D tNormalMap0;\n\t\tuniform sampler2D tNormalMap1;\n\n\t\t#ifdef USE_FLOWMAP\n\t\t\tuniform sampler2D tFlowMap;\n\t\t#else\n\t\t\tuniform vec2 flowDirection;\n\t\t#endif\n\n\t\tuniform vec3 color;\n\t\tuniform float reflectivity;\n\t\tuniform vec4 config;\n\n\t\tvarying vec4 vCoord;\n\t\tvarying vec2 vUv;\n\t\tvarying vec3 vToEye;\n\n\t\tvoid main() {\n\n\t\t\t#include \n\n\t\t\tfloat flowMapOffset0 = config.x;\n\t\t\tfloat flowMapOffset1 = config.y;\n\t\t\tfloat halfCycle = config.z;\n\t\t\tfloat scale = config.w;\n\n\t\t\tvec3 toEye = normalize( vToEye );\n\n\t\t\t// determine flow direction\n\t\t\tvec2 flow;\n\t\t\t#ifdef USE_FLOWMAP\n\t\t\t\tflow = texture2D( tFlowMap, vUv ).rg * 2.0 - 1.0;\n\t\t\t#else\n\t\t\t\tflow = flowDirection;\n\t\t\t#endif\n\t\t\tflow.x *= - 1.0;\n\n\t\t\t// sample normal maps (distort uvs with flowdata)\n\t\t\tvec4 normalColor0 = texture2D( tNormalMap0, ( vUv * scale ) + flow * flowMapOffset0 );\n\t\t\tvec4 normalColor1 = texture2D( tNormalMap1, ( vUv * scale ) + flow * flowMapOffset1 );\n\n\t\t\t// linear interpolate to get the final normal color\n\t\t\tfloat flowLerp = abs( halfCycle - flowMapOffset0 ) / halfCycle;\n\t\t\tvec4 normalColor = mix( normalColor0, normalColor1, flowLerp );\n\n\t\t\t// calculate normal vector\n\t\t\tvec3 normal = normalize( vec3( normalColor.r * 2.0 - 1.0, normalColor.b, normalColor.g * 2.0 - 1.0 ) );\n\n\t\t\t// calculate the fresnel term to blend reflection and refraction maps\n\t\t\tfloat theta = max( dot( toEye, normal ), 0.0 );\n\t\t\tfloat reflectance = reflectivity + ( 1.0 - reflectivity ) * pow( ( 1.0 - theta ), 5.0 );\n\n\t\t\t// calculate final uv coords\n\t\t\tvec3 coord = vCoord.xyz / vCoord.w;\n\t\t\tvec2 uv = coord.xy + coord.z * normal.xz * 0.05;\n\n\t\t\tvec4 reflectColor = texture2D( tReflectionMap, vec2( 1.0 - uv.x, uv.y ) );\n\t\t\tvec4 refractColor = texture2D( tRefractionMap, uv );\n\n\t\t\t// multiply water color with the mix of both textures\n\t\t\tgl_FragColor = vec4( color, 1.0 ) * mix( refractColor, reflectColor, reflectance );\n\n\t\t\t#include \n\t\t\t#include <${version >= 154 ? 'colorspace_fragment' : 'encodings_fragment'}>\n\t\t\t#include \n\n\t\t}`,\n }\n\n constructor(geometry, options = {}) {\n super(geometry)\n\n this.isWater = true\n\n this.type = 'Water'\n\n const scope = this\n\n const color = options.color !== undefined ? new Color(options.color) : new Color(0xffffff)\n const textureWidth = options.textureWidth || 512\n const textureHeight = options.textureHeight || 512\n const clipBias = options.clipBias || 0\n const flowDirection = options.flowDirection || new Vector2(1, 0)\n const flowSpeed = options.flowSpeed || 0.03\n const reflectivity = options.reflectivity || 0.02\n const scale = options.scale || 1\n const shader = options.shader || Water2.WaterShader\n const encoding = options.encoding !== undefined ? options.encoding : 3000\n\n const flowMap = options.flowMap || undefined\n const normalMap0 = options.normalMap0\n const normalMap1 = options.normalMap1\n\n const cycle = 0.15 // a cycle of a flow map phase\n const halfCycle = cycle * 0.5\n const textureMatrix = new Matrix4()\n const clock = new Clock()\n\n // internal components\n\n if (Reflector === undefined) {\n console.error('THREE.Water: Required component Reflector not found.')\n return\n }\n\n if (Refractor === undefined) {\n console.error('THREE.Water: Required component Refractor not found.')\n return\n }\n\n const reflector = new Reflector(geometry, {\n textureWidth: textureWidth,\n textureHeight: textureHeight,\n clipBias: clipBias,\n encoding: encoding,\n })\n\n const refractor = new Refractor(geometry, {\n textureWidth: textureWidth,\n textureHeight: textureHeight,\n clipBias: clipBias,\n encoding: encoding,\n })\n\n reflector.matrixAutoUpdate = false\n refractor.matrixAutoUpdate = false\n\n // material\n\n this.material = new ShaderMaterial({\n uniforms: UniformsUtils.merge([UniformsLib['fog'], shader.uniforms]),\n vertexShader: shader.vertexShader,\n fragmentShader: shader.fragmentShader,\n transparent: true,\n fog: true,\n })\n\n if (flowMap !== undefined) {\n this.material.defines.USE_FLOWMAP = ''\n this.material.uniforms['tFlowMap'] = {\n type: 't',\n value: flowMap,\n }\n } else {\n this.material.uniforms['flowDirection'] = {\n type: 'v2',\n value: flowDirection,\n }\n }\n\n // maps\n\n normalMap0.wrapS = normalMap0.wrapT = RepeatWrapping\n normalMap1.wrapS = normalMap1.wrapT = RepeatWrapping\n\n this.material.uniforms['tReflectionMap'].value = reflector.getRenderTarget().texture\n this.material.uniforms['tRefractionMap'].value = refractor.getRenderTarget().texture\n this.material.uniforms['tNormalMap0'].value = normalMap0\n this.material.uniforms['tNormalMap1'].value = normalMap1\n\n // water\n\n this.material.uniforms['color'].value = color\n this.material.uniforms['reflectivity'].value = reflectivity\n this.material.uniforms['textureMatrix'].value = textureMatrix\n\n // inital values\n\n this.material.uniforms['config'].value.x = 0 // flowMapOffset0\n this.material.uniforms['config'].value.y = halfCycle // flowMapOffset1\n this.material.uniforms['config'].value.z = halfCycle // halfCycle\n this.material.uniforms['config'].value.w = scale // scale\n\n // functions\n\n function updateTextureMatrix(camera) {\n textureMatrix.set(0.5, 0.0, 0.0, 0.5, 0.0, 0.5, 0.0, 0.5, 0.0, 0.0, 0.5, 0.5, 0.0, 0.0, 0.0, 1.0)\n\n textureMatrix.multiply(camera.projectionMatrix)\n textureMatrix.multiply(camera.matrixWorldInverse)\n textureMatrix.multiply(scope.matrixWorld)\n }\n\n function updateFlow() {\n const delta = clock.getDelta()\n const config = scope.material.uniforms['config']\n\n config.value.x += flowSpeed * delta // flowMapOffset0\n config.value.y = config.value.x + halfCycle // flowMapOffset1\n\n // Important: The distance between offsets should be always the value of \"halfCycle\".\n // Moreover, both offsets should be in the range of [ 0, cycle ].\n // This approach ensures a smooth water flow and avoids \"reset\" effects.\n\n if (config.value.x >= cycle) {\n config.value.x = 0\n config.value.y = halfCycle\n } else if (config.value.y >= cycle) {\n config.value.y = config.value.y - 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