const loader3 = new RGBELoader();//HDR光 loader3.setPath('/hdr/') loader3.load( 'unfinished_office_night_1k.hdr', function(texture){ console.log(texture) var pmremGenerator = new THREE.PMREMGenerator(renderer); pmremGenerator.compileEquirectangularShader(); var envMap = pmremGenerator.fromEquirectangular(texture).texture; console.log(envMap) scene.background = envMap; scene.environment = envMap; texture.dispose(); pmremGenerator.dispose(); }) var axisHelper = new THREE.AxesHelper(40); scene.add(axisHelper);我想控制hdr的强度，要如何修改代码

在Three.js中控制HDR的强度，可以通过调整PMREMGenerator的参数来实现。具体代码如下：

const loader3 = new RGBELoader();
loader3.setPath('/hdr/');
loader3.load('unfinished_office_night_1k.hdr', function(texture) {
  console.log(texture);
  var pmremGenerator = new THREE.PMREMGenerator(renderer);
  pmremGenerator.compileEquirectangularShader();
  var envMap = pmremGenerator.fromEquirectangular(texture).texture;
  console.log(envMap);

  // 通过调整PMREMGenerator的参数来控制HDR强度
  pmremGenerator.toneMappingExposure = 1.2; // 设置HDR强度值
  pmremGenerator.toneMappingWhitePoint = 1.0; // 设置白平衡点

  scene.background = envMap;
  scene.environment = envMap;

  texture.dispose();
  pmremGenerator.dispose();
});

var axisHelper = new THREE.AxesHelper(40);
scene.add(axisHelper);

在上述示例中，我们通过设置PMREMGenerator的toneMappingExposure参数来控制HDR强度值。可以根据需要调整参数，达到预期的HDR效果。同时，我们还设置了PMREMGenerator的toneMappingWhitePoint参数来控制白平衡点，也可以根据需要进行调整。