@openhps/core/src/three/renderers/webgl/WebGLCubeMaps.js

Open Hybrid Positioning System - Core component

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.WebGLCubeMaps = WebGLCubeMaps;
var _constants = require("../../constants.js");
var _WebGLCubeRenderTarget = require("../WebGLCubeRenderTarget.js");
function WebGLCubeMaps(renderer) {
  let cubemaps = new WeakMap();
  function mapTextureMapping(texture, mapping) {
    if (mapping === _constants.EquirectangularReflectionMapping) {
      texture.mapping = _constants.CubeReflectionMapping;
    } else if (mapping === _constants.EquirectangularRefractionMapping) {
      texture.mapping = _constants.CubeRefractionMapping;
    }
    return texture;
  }
  function get(texture) {
    if (texture && texture.isTexture) {
      const mapping = texture.mapping;
      if (mapping === _constants.EquirectangularReflectionMapping || mapping === _constants.EquirectangularRefractionMapping) {
        if (cubemaps.has(texture)) {
          const cubemap = cubemaps.get(texture).texture;
          return mapTextureMapping(cubemap, texture.mapping);
        } else {
          const image = texture.image;
          if (image && image.height > 0) {
            const renderTarget = new _WebGLCubeRenderTarget.WebGLCubeRenderTarget(image.height);
            renderTarget.fromEquirectangularTexture(renderer, texture);
            cubemaps.set(texture, renderTarget);
            texture.addEventListener('dispose', onTextureDispose);
            return mapTextureMapping(renderTarget.texture, texture.mapping);
          } else {
            // image not yet ready. try the conversion next frame

            return null;
          }
        }
      }
    }
    return texture;
  }
  function onTextureDispose(event) {
    const texture = event.target;
    texture.removeEventListener('dispose', onTextureDispose);
    const cubemap = cubemaps.get(texture);
    if (cubemap !== undefined) {
      cubemaps.delete(texture);
      cubemap.dispose();
    }
  }
  function dispose() {
    cubemaps = new WeakMap();
  }
  return {
    get: get,
    dispose: dispose
  };
}