Collisions two objects

[calrk]

Since you are using the position and the geometry of the object, you can use the built in ThreeJS function intersectsBox(). You can clone the original geometrys’ bounding boxes, apply their object’s transform matrix to them and check for intersections between them.

An example of this is discussed here:

[resolved]How to detect if two objects overlap？

If you want to do simple intersection detection without use of a physics engine, you can use the mesh’s bounding boxes to detect intersection with each other: In order to accurately collide, you will need to apply the mesh’s matrix transform to the bounding box. box1.updateMatrixWorld(); box2.updateMatrixWorld(); var bounding1 = box1.geometry.boundingBox.clone(); bounding1.applyMatrix4(box1.matrixWorld); var bounding2 = box2.geometry.boundingBox.clone(); bounding2.applyMatrix4(box2.matrixW…

With the relevant code below

function detectCollisionCubes(object1, object2){
  object1.geometry.computeBoundingBox(); //not needed if its already calculated
  object2.geometry.computeBoundingBox();
  object1.updateMatrixWorld();
  object2.updateMatrixWorld();
  
  var box1 = object1.geometry.boundingBox.clone();
  box1.applyMatrix4(object1.matrixWorld);

  var box2 = object2.geometry.boundingBox.clone();
  box2.applyMatrix4(object2.matrixWorld);

  return box1.intersectsBox(box2);
}