ThreeJS相机倒谱frustum.containsPoint总是返回真

Question

我试图获得相机可以看到的所有物体，因为我想更新它看不到的对象的位置。

frustum.containsPoint总是返回true，这是最大的问题

任何帮助都非常感谢。

​

camera.updateMatrix();
  camera.updateMatrixWorld();

  var frustum = new THREE.Frustum();
  var projScreenMatrix = new THREE.Matrix4();
  projScreenMatrix.multiplyMatrices(camera.projectionMatrix, camera.matrixWorldInverse);

  // frustum.setFromProjectionMatrix(camera.projectionMatrix);
  frustum.setFromProjectionMatrix(new THREE.Matrix4().multiplyMatrices(camera.projectionMatrix, camera.matrixWorldInverse));

  for (let index = 0; index < scene.children.length; index++) {
    scene.children[index].updateMatrix(); // make sure plane's local matrix is updated
    scene.children[index].updateMatrixWorld();

    if (frustum.containsPoint(scene.children[index])) {
      //stuff happens...
      if (scene.children[index].name === "coin") {
        scene.children[index].rotation.x += 0.01;
        scene.children[index].position.y -= 0.1;
      }
      // console.log("mesh in view Frustrum");
    } else {
      console.log("mesh not in view Frustrum");
    }
  }

​

Answer 1

您正在使用：

frustum.containsPoint(scene.children[index])

它应该是：

frustum.intersectsObject(scene.children[index])

Scene.children不保存点，而是保存3D对象。