@openhps/core/dist/cjs/three/renderers/webgl/WebGLUniforms.js

Open Hybrid Positioning System - Core component

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.WebGLUniforms = void 0;
var _CubeTexture = require("../../textures/CubeTexture.js");
var _Texture = require("../../textures/Texture.js");
var _DataArrayTexture = require("../../textures/DataArrayTexture.js");
var _Data3DTexture = require("../../textures/Data3DTexture.js");
var _DepthTexture = require("../../textures/DepthTexture.js");
var _constants = require("../../constants.js");
/**
 * Uniforms of a program.
 * Those form a tree structure with a special top-level container for the root,
 * which you get by calling 'new WebGLUniforms( gl, program )'.
 *
 *
 * Properties of inner nodes including the top-level container:
 *
 * .seq - array of nested uniforms
 * .map - nested uniforms by name
 *
 *
 * Methods of all nodes except the top-level container:
 *
 * .setValue( gl, value, [textures] )
 *
 * 		uploads a uniform value(s)
 *  	the 'textures' parameter is needed for sampler uniforms
 *
 *
 * Static methods of the top-level container (textures factorizations):
 *
 * .upload( gl, seq, values, textures )
 *
 * 		sets uniforms in 'seq' to 'values[id].value'
 *
 * .seqWithValue( seq, values ) : filteredSeq
 *
 * 		filters 'seq' entries with corresponding entry in values
 *
 *
 * Methods of the top-level container (textures factorizations):
 *
 * .setValue( gl, name, value, textures )
 *
 * 		sets uniform with  name 'name' to 'value'
 *
 * .setOptional( gl, obj, prop )
 *
 * 		like .set for an optional property of the object
 *
 */

const emptyTexture = /*@__PURE__*/new _Texture.Texture();
const emptyShadowTexture = /*@__PURE__*/new _DepthTexture.DepthTexture(1, 1);
const emptyArrayTexture = /*@__PURE__*/new _DataArrayTexture.DataArrayTexture();
const empty3dTexture = /*@__PURE__*/new _Data3DTexture.Data3DTexture();
const emptyCubeTexture = /*@__PURE__*/new _CubeTexture.CubeTexture();

// --- Utilities ---

// Array Caches (provide typed arrays for temporary by size)

const arrayCacheF32 = [];
const arrayCacheI32 = [];

// Float32Array caches used for uploading Matrix uniforms

const mat4array = new Float32Array(16);
const mat3array = new Float32Array(9);
const mat2array = new Float32Array(4);

// Flattening for arrays of vectors and matrices

function flatten(array, nBlocks, blockSize) {
  const firstElem = array[0];
  if (firstElem <= 0 || firstElem > 0) return array;
  // unoptimized: ! isNaN( firstElem )
  // see http://jacksondunstan.com/articles/983

  const n = nBlocks * blockSize;
  let r = arrayCacheF32[n];
  if (r === undefined) {
    r = new Float32Array(n);
    arrayCacheF32[n] = r;
  }
  if (nBlocks !== 0) {
    firstElem.toArray(r, 0);
    for (let i = 1, offset = 0; i !== nBlocks; ++i) {
      offset += blockSize;
      array[i].toArray(r, offset);
    }
  }
  return r;
}
function arraysEqual(a, b) {
  if (a.length !== b.length) return false;
  for (let i = 0, l = a.length; i < l; i++) {
    if (a[i] !== b[i]) return false;
  }
  return true;
}
function copyArray(a, b) {
  for (let i = 0, l = b.length; i < l; i++) {
    a[i] = b[i];
  }
}

// Texture unit allocation

function allocTexUnits(textures, n) {
  let r = arrayCacheI32[n];
  if (r === undefined) {
    r = new Int32Array(n);
    arrayCacheI32[n] = r;
  }
  for (let i = 0; i !== n; ++i) {
    r[i] = textures.allocateTextureUnit();
  }
  return r;
}

// --- Setters ---

// Note: Defining these methods externally, because they come in a bunch
// and this way their names minify.

// Single scalar

function setValueV1f(gl, v) {
  const cache = this.cache;
  if (cache[0] === v) return;
  gl.uniform1f(this.addr, v);
  cache[0] = v;
}

// Single float vector (from flat array or THREE.VectorN)

function setValueV2f(gl, v) {
  const cache = this.cache;
  if (v.x !== undefined) {
    if (cache[0] !== v.x || cache[1] !== v.y) {
      gl.uniform2f(this.addr, v.x, v.y);
      cache[0] = v.x;
      cache[1] = v.y;
    }
  } else {
    if (arraysEqual(cache, v)) return;
    gl.uniform2fv(this.addr, v);
    copyArray(cache, v);
  }
}
function setValueV3f(gl, v) {
  const cache = this.cache;
  if (v.x !== undefined) {
    if (cache[0] !== v.x || cache[1] !== v.y || cache[2] !== v.z) {
      gl.uniform3f(this.addr, v.x, v.y, v.z);
      cache[0] = v.x;
      cache[1] = v.y;
      cache[2] = v.z;
    }
  } else if (v.r !== undefined) {
    if (cache[0] !== v.r || cache[1] !== v.g || cache[2] !== v.b) {
      gl.uniform3f(this.addr, v.r, v.g, v.b);
      cache[0] = v.r;
      cache[1] = v.g;
      cache[2] = v.b;
    }
  } else {
    if (arraysEqual(cache, v)) return;
    gl.uniform3fv(this.addr, v);
    copyArray(cache, v);
  }
}
function setValueV4f(gl, v) {
  const cache = this.cache;
  if (v.x !== undefined) {
    if (cache[0] !== v.x || cache[1] !== v.y || cache[2] !== v.z || cache[3] !== v.w) {
      gl.uniform4f(this.addr, v.x, v.y, v.z, v.w);
      cache[0] = v.x;
      cache[1] = v.y;
      cache[2] = v.z;
      cache[3] = v.w;
    }
  } else {
    if (arraysEqual(cache, v)) return;
    gl.uniform4fv(this.addr, v);
    copyArray(cache, v);
  }
}

// Single matrix (from flat array or THREE.MatrixN)

function setValueM2(gl, v) {
  const cache = this.cache;
  const elements = v.elements;
  if (elements === undefined) {
    if (arraysEqual(cache, v)) return;
    gl.uniformMatrix2fv(this.addr, false, v);
    copyArray(cache, v);
  } else {
    if (arraysEqual(cache, elements)) return;
    mat2array.set(elements);
    gl.uniformMatrix2fv(this.addr, false, mat2array);
    copyArray(cache, elements);
  }
}
function setValueM3(gl, v) {
  const cache = this.cache;
  const elements = v.elements;
  if (elements === undefined) {
    if (arraysEqual(cache, v)) return;
    gl.uniformMatrix3fv(this.addr, false, v);
    copyArray(cache, v);
  } else {
    if (arraysEqual(cache, elements)) return;
    mat3array.set(elements);
    gl.uniformMatrix3fv(this.addr, false, mat3array);
    copyArray(cache, elements);
  }
}
function setValueM4(gl, v) {
  const cache = this.cache;
  const elements = v.elements;
  if (elements === undefined) {
    if (arraysEqual(cache, v)) return;
    gl.uniformMatrix4fv(this.addr, false, v);
    copyArray(cache, v);
  } else {
    if (arraysEqual(cache, elements)) return;
    mat4array.set(elements);
    gl.uniformMatrix4fv(this.addr, false, mat4array);
    copyArray(cache, elements);
  }
}

// Single integer / boolean

function setValueV1i(gl, v) {
  const cache = this.cache;
  if (cache[0] === v) return;
  gl.uniform1i(this.addr, v);
  cache[0] = v;
}

// Single integer / boolean vector (from flat array or THREE.VectorN)

function setValueV2i(gl, v) {
  const cache = this.cache;
  if (v.x !== undefined) {
    if (cache[0] !== v.x || cache[1] !== v.y) {
      gl.uniform2i(this.addr, v.x, v.y);
      cache[0] = v.x;
      cache[1] = v.y;
    }
  } else {
    if (arraysEqual(cache, v)) return;
    gl.uniform2iv(this.addr, v);
    copyArray(cache, v);
  }
}
function setValueV3i(gl, v) {
  const cache = this.cache;
  if (v.x !== undefined) {
    if (cache[0] !== v.x || cache[1] !== v.y || cache[2] !== v.z) {
      gl.uniform3i(this.addr, v.x, v.y, v.z);
      cache[0] = v.x;
      cache[1] = v.y;
      cache[2] = v.z;
    }
  } else {
    if (arraysEqual(cache, v)) return;
    gl.uniform3iv(this.addr, v);
    copyArray(cache, v);
  }
}
function setValueV4i(gl, v) {
  const cache = this.cache;
  if (v.x !== undefined) {
    if (cache[0] !== v.x || cache[1] !== v.y || cache[2] !== v.z || cache[3] !== v.w) {
      gl.uniform4i(this.addr, v.x, v.y, v.z, v.w);
      cache[0] = v.x;
      cache[1] = v.y;
      cache[2] = v.z;
      cache[3] = v.w;
    }
  } else {
    if (arraysEqual(cache, v)) return;
    gl.uniform4iv(this.addr, v);
    copyArray(cache, v);
  }
}

// Single unsigned integer

function setValueV1ui(gl, v) {
  const cache = this.cache;
  if (cache[0] === v) return;
  gl.uniform1ui(this.addr, v);
  cache[0] = v;
}

// Single unsigned integer vector (from flat array or THREE.VectorN)

function setValueV2ui(gl, v) {
  const cache = this.cache;
  if (v.x !== undefined) {
    if (cache[0] !== v.x || cache[1] !== v.y) {
      gl.uniform2ui(this.addr, v.x, v.y);
      cache[0] = v.x;
      cache[1] = v.y;
    }
  } else {
    if (arraysEqual(cache, v)) return;
    gl.uniform2uiv(this.addr, v);
    copyArray(cache, v);
  }
}
function setValueV3ui(gl, v) {
  const cache = this.cache;
  if (v.x !== undefined) {
    if (cache[0] !== v.x || cache[1] !== v.y || cache[2] !== v.z) {
      gl.uniform3ui(this.addr, v.x, v.y, v.z);
      cache[0] = v.x;
      cache[1] = v.y;
      cache[2] = v.z;
    }
  } else {
    if (arraysEqual(cache, v)) return;
    gl.uniform3uiv(this.addr, v);
    copyArray(cache, v);
  }
}
function setValueV4ui(gl, v) {
  const cache = this.cache;
  if (v.x !== undefined) {
    if (cache[0] !== v.x || cache[1] !== v.y || cache[2] !== v.z || cache[3] !== v.w) {
      gl.uniform4ui(this.addr, v.x, v.y, v.z, v.w);
      cache[0] = v.x;
      cache[1] = v.y;
      cache[2] = v.z;
      cache[3] = v.w;
    }
  } else {
    if (arraysEqual(cache, v)) return;
    gl.uniform4uiv(this.addr, v);
    copyArray(cache, v);
  }
}

// Single texture (2D / Cube)

function setValueT1(gl, v, textures) {
  const cache = this.cache;
  const unit = textures.allocateTextureUnit();
  if (cache[0] !== unit) {
    gl.uniform1i(this.addr, unit);
    cache[0] = unit;
  }
  let emptyTexture2D;
  if (this.type === gl.SAMPLER_2D_SHADOW) {
    emptyShadowTexture.compareFunction = _constants.LessEqualCompare; // #28670
    emptyTexture2D = emptyShadowTexture;
  } else {
    emptyTexture2D = emptyTexture;
  }
  textures.setTexture2D(v || emptyTexture2D, unit);
}
function setValueT3D1(gl, v, textures) {
  const cache = this.cache;
  const unit = textures.allocateTextureUnit();
  if (cache[0] !== unit) {
    gl.uniform1i(this.addr, unit);
    cache[0] = unit;
  }
  textures.setTexture3D(v || empty3dTexture, unit);
}
function setValueT6(gl, v, textures) {
  const cache = this.cache;
  const unit = textures.allocateTextureUnit();
  if (cache[0] !== unit) {
    gl.uniform1i(this.addr, unit);
    cache[0] = unit;
  }
  textures.setTextureCube(v || emptyCubeTexture, unit);
}
function setValueT2DArray1(gl, v, textures) {
  const cache = this.cache;
  const unit = textures.allocateTextureUnit();
  if (cache[0] !== unit) {
    gl.uniform1i(this.addr, unit);
    cache[0] = unit;
  }
  textures.setTexture2DArray(v || emptyArrayTexture, unit);
}

// Helper to pick the right setter for the singular case

function getSingularSetter(type) {
  switch (type) {
    case 0x1406:
      return setValueV1f;
    // FLOAT
    case 0x8b50:
      return setValueV2f;
    // _VEC2
    case 0x8b51:
      return setValueV3f;
    // _VEC3
    case 0x8b52:
      return setValueV4f;
    // _VEC4

    case 0x8b5a:
      return setValueM2;
    // _MAT2
    case 0x8b5b:
      return setValueM3;
    // _MAT3
    case 0x8b5c:
      return setValueM4;
    // _MAT4

    case 0x1404:
    case 0x8b56:
      return setValueV1i;
    // INT, BOOL
    case 0x8b53:
    case 0x8b57:
      return setValueV2i;
    // _VEC2
    case 0x8b54:
    case 0x8b58:
      return setValueV3i;
    // _VEC3
    case 0x8b55:
    case 0x8b59:
      return setValueV4i;
    // _VEC4

    case 0x1405:
      return setValueV1ui;
    // UINT
    case 0x8dc6:
      return setValueV2ui;
    // _VEC2
    case 0x8dc7:
      return setValueV3ui;
    // _VEC3
    case 0x8dc8:
      return setValueV4ui;
    // _VEC4

    case 0x8b5e: // SAMPLER_2D
    case 0x8d66: // SAMPLER_EXTERNAL_OES
    case 0x8dca: // INT_SAMPLER_2D
    case 0x8dd2: // UNSIGNED_INT_SAMPLER_2D
    case 0x8b62:
      // SAMPLER_2D_SHADOW
      return setValueT1;
    case 0x8b5f: // SAMPLER_3D
    case 0x8dcb: // INT_SAMPLER_3D
    case 0x8dd3:
      // UNSIGNED_INT_SAMPLER_3D
      return setValueT3D1;
    case 0x8b60: // SAMPLER_CUBE
    case 0x8dcc: // INT_SAMPLER_CUBE
    case 0x8dd4: // UNSIGNED_INT_SAMPLER_CUBE
    case 0x8dc5:
      // SAMPLER_CUBE_SHADOW
      return setValueT6;
    case 0x8dc1: // SAMPLER_2D_ARRAY
    case 0x8dcf: // INT_SAMPLER_2D_ARRAY
    case 0x8dd7: // UNSIGNED_INT_SAMPLER_2D_ARRAY
    case 0x8dc4:
      // SAMPLER_2D_ARRAY_SHADOW
      return setValueT2DArray1;
  }
}

// Array of scalars

function setValueV1fArray(gl, v) {
  gl.uniform1fv(this.addr, v);
}

// Array of vectors (from flat array or array of THREE.VectorN)

function setValueV2fArray(gl, v) {
  const data = flatten(v, this.size, 2);
  gl.uniform2fv(this.addr, data);
}
function setValueV3fArray(gl, v) {
  const data = flatten(v, this.size, 3);
  gl.uniform3fv(this.addr, data);
}
function setValueV4fArray(gl, v) {
  const data = flatten(v, this.size, 4);
  gl.uniform4fv(this.addr, data);
}

// Array of matrices (from flat array or array of THREE.MatrixN)

function setValueM2Array(gl, v) {
  const data = flatten(v, this.size, 4);
  gl.uniformMatrix2fv(this.addr, false, data);
}
function setValueM3Array(gl, v) {
  const data = flatten(v, this.size, 9);
  gl.uniformMatrix3fv(this.addr, false, data);
}
function setValueM4Array(gl, v) {
  const data = flatten(v, this.size, 16);
  gl.uniformMatrix4fv(this.addr, false, data);
}

// Array of integer / boolean

function setValueV1iArray(gl, v) {
  gl.uniform1iv(this.addr, v);
}

// Array of integer / boolean vectors (from flat array)

function setValueV2iArray(gl, v) {
  gl.uniform2iv(this.addr, v);
}
function setValueV3iArray(gl, v) {
  gl.uniform3iv(this.addr, v);
}
function setValueV4iArray(gl, v) {
  gl.uniform4iv(this.addr, v);
}

// Array of unsigned integer

function setValueV1uiArray(gl, v) {
  gl.uniform1uiv(this.addr, v);
}

// Array of unsigned integer vectors (from flat array)

function setValueV2uiArray(gl, v) {
  gl.uniform2uiv(this.addr, v);
}
function setValueV3uiArray(gl, v) {
  gl.uniform3uiv(this.addr, v);
}
function setValueV4uiArray(gl, v) {
  gl.uniform4uiv(this.addr, v);
}

// Array of textures (2D / 3D / Cube / 2DArray)

function setValueT1Array(gl, v, textures) {
  const cache = this.cache;
  const n = v.length;
  const units = allocTexUnits(textures, n);
  if (!arraysEqual(cache, units)) {
    gl.uniform1iv(this.addr, units);
    copyArray(cache, units);
  }
  for (let i = 0; i !== n; ++i) {
    textures.setTexture2D(v[i] || emptyTexture, units[i]);
  }
}
function setValueT3DArray(gl, v, textures) {
  const cache = this.cache;
  const n = v.length;
  const units = allocTexUnits(textures, n);
  if (!arraysEqual(cache, units)) {
    gl.uniform1iv(this.addr, units);
    copyArray(cache, units);
  }
  for (let i = 0; i !== n; ++i) {
    textures.setTexture3D(v[i] || empty3dTexture, units[i]);
  }
}
function setValueT6Array(gl, v, textures) {
  const cache = this.cache;
  const n = v.length;
  const units = allocTexUnits(textures, n);
  if (!arraysEqual(cache, units)) {
    gl.uniform1iv(this.addr, units);
    copyArray(cache, units);
  }
  for (let i = 0; i !== n; ++i) {
    textures.setTextureCube(v[i] || emptyCubeTexture, units[i]);
  }
}
function setValueT2DArrayArray(gl, v, textures) {
  const cache = this.cache;
  const n = v.length;
  const units = allocTexUnits(textures, n);
  if (!arraysEqual(cache, units)) {
    gl.uniform1iv(this.addr, units);
    copyArray(cache, units);
  }
  for (let i = 0; i !== n; ++i) {
    textures.setTexture2DArray(v[i] || emptyArrayTexture, units[i]);
  }
}

// Helper to pick the right setter for a pure (bottom-level) array

function getPureArraySetter(type) {
  switch (type) {
    case 0x1406:
      return setValueV1fArray;
    // FLOAT
    case 0x8b50:
      return setValueV2fArray;
    // _VEC2
    case 0x8b51:
      return setValueV3fArray;
    // _VEC3
    case 0x8b52:
      return setValueV4fArray;
    // _VEC4

    case 0x8b5a:
      return setValueM2Array;
    // _MAT2
    case 0x8b5b:
      return setValueM3Array;
    // _MAT3
    case 0x8b5c:
      return setValueM4Array;
    // _MAT4

    case 0x1404:
    case 0x8b56:
      return setValueV1iArray;
    // INT, BOOL
    case 0x8b53:
    case 0x8b57:
      return setValueV2iArray;
    // _VEC2
    case 0x8b54:
    case 0x8b58:
      return setValueV3iArray;
    // _VEC3
    case 0x8b55:
    case 0x8b59:
      return setValueV4iArray;
    // _VEC4

    case 0x1405:
      return setValueV1uiArray;
    // UINT
    case 0x8dc6:
      return setValueV2uiArray;
    // _VEC2
    case 0x8dc7:
      return setValueV3uiArray;
    // _VEC3
    case 0x8dc8:
      return setValueV4uiArray;
    // _VEC4

    case 0x8b5e: // SAMPLER_2D
    case 0x8d66: // SAMPLER_EXTERNAL_OES
    case 0x8dca: // INT_SAMPLER_2D
    case 0x8dd2: // UNSIGNED_INT_SAMPLER_2D
    case 0x8b62:
      // SAMPLER_2D_SHADOW
      return setValueT1Array;
    case 0x8b5f: // SAMPLER_3D
    case 0x8dcb: // INT_SAMPLER_3D
    case 0x8dd3:
      // UNSIGNED_INT_SAMPLER_3D
      return setValueT3DArray;
    case 0x8b60: // SAMPLER_CUBE
    case 0x8dcc: // INT_SAMPLER_CUBE
    case 0x8dd4: // UNSIGNED_INT_SAMPLER_CUBE
    case 0x8dc5:
      // SAMPLER_CUBE_SHADOW
      return setValueT6Array;
    case 0x8dc1: // SAMPLER_2D_ARRAY
    case 0x8dcf: // INT_SAMPLER_2D_ARRAY
    case 0x8dd7: // UNSIGNED_INT_SAMPLER_2D_ARRAY
    case 0x8dc4:
      // SAMPLER_2D_ARRAY_SHADOW
      return setValueT2DArrayArray;
  }
}

// --- Uniform Classes ---

class SingleUniform {
  constructor(id, activeInfo, addr) {
    this.id = id;
    this.addr = addr;
    this.cache = [];
    this.type = activeInfo.type;
    this.setValue = getSingularSetter(activeInfo.type);

    // this.path = activeInfo.name; // DEBUG
  }
}
class PureArrayUniform {
  constructor(id, activeInfo, addr) {
    this.id = id;
    this.addr = addr;
    this.cache = [];
    this.type = activeInfo.type;
    this.size = activeInfo.size;
    this.setValue = getPureArraySetter(activeInfo.type);

    // this.path = activeInfo.name; // DEBUG
  }
}
class StructuredUniform {
  constructor(id) {
    this.id = id;
    this.seq = [];
    this.map = {};
  }
  setValue(gl, value, textures) {
    const seq = this.seq;
    for (let i = 0, n = seq.length; i !== n; ++i) {
      const u = seq[i];
      u.setValue(gl, value[u.id], textures);
    }
  }
}

// --- Top-level ---

// Parser - builds up the property tree from the path strings

const RePathPart = /(\w+)(\])?(\[|\.)?/g;

// extracts
// 	- the identifier (member name or array index)
//  - followed by an optional right bracket (found when array index)
//  - followed by an optional left bracket or dot (type of subscript)
//
// Note: These portions can be read in a non-overlapping fashion and
// allow straightforward parsing of the hierarchy that WebGL encodes
// in the uniform names.

function addUniform(container, uniformObject) {
  container.seq.push(uniformObject);
  container.map[uniformObject.id] = uniformObject;
}
function parseUniform(activeInfo, addr, container) {
  const path = activeInfo.name,
    pathLength = path.length;

  // reset RegExp object, because of the early exit of a previous run
  RePathPart.lastIndex = 0;
  while (true) {
    const match = RePathPart.exec(path),
      matchEnd = RePathPart.lastIndex;
    let id = match[1];
    const idIsIndex = match[2] === ']',
      subscript = match[3];
    if (idIsIndex) id = id | 0; // convert to integer

    if (subscript === undefined || subscript === '[' && matchEnd + 2 === pathLength) {
      // bare name or "pure" bottom-level array "[0]" suffix

      addUniform(container, subscript === undefined ? new SingleUniform(id, activeInfo, addr) : new PureArrayUniform(id, activeInfo, addr));
      break;
    } else {
      // step into inner node / create it in case it doesn't exist

      const map = container.map;
      let next = map[id];
      if (next === undefined) {
        next = new StructuredUniform(id);
        addUniform(container, next);
      }
      container = next;
    }
  }
}

// Root Container

class WebGLUniforms {
  constructor(gl, program) {
    this.seq = [];
    this.map = {};
    const n = gl.getProgramParameter(program, gl.ACTIVE_UNIFORMS);
    for (let i = 0; i < n; ++i) {
      const info = gl.getActiveUniform(program, i),
        addr = gl.getUniformLocation(program, info.name);
      parseUniform(info, addr, this);
    }
  }
  setValue(gl, name, value, textures) {
    const u = this.map[name];
    if (u !== undefined) u.setValue(gl, value, textures);
  }
  setOptional(gl, object, name) {
    const v = object[name];
    if (v !== undefined) this.setValue(gl, name, v);
  }
  static upload(gl, seq, values, textures) {
    for (let i = 0, n = seq.length; i !== n; ++i) {
      const u = seq[i],
        v = values[u.id];
      if (v.needsUpdate !== false) {
        // note: always updating when .needsUpdate is undefined
        u.setValue(gl, v.value, textures);
      }
    }
  }
  static seqWithValue(seq, values) {
    const r = [];
    for (let i = 0, n = seq.length; i !== n; ++i) {
      const u = seq[i];
      if (u.id in values) r.push(u);
    }
    return r;
  }
}
exports.WebGLUniforms = WebGLUniforms;