Moving Mesh with Free Camera does not collide with another mesh

[Hagop]

Hi all

 

This might sound a simple question but i don't seem to to figure out the solution.

I have a mesh for example a box (box = BABYLON.Mesh.CreateBox("box", 40, scene);.

I have enabled collisions by using scene.collisionsEnabled = true;

I also have a freecamera and another imported mesh for example a shelve which is at a fixed position. .

If I try to move the freecamera through the sheve it collides and everything is fine.

However, if I attach the box to the freecamera so that the box is constantly ahead of the freecamera

scene.registerBeforeRender(function () {

box.position.z = scene.activeCamera.position.z + 100 ;

});

and as I move the camera and the box through the shelve the box passes through the shelve, whilst the camera collides with it.

Using the code below I can verify that the box intersects with the shelve

if (box.intersectsMesh(shelve, false)) {
                                      box.material.emissiveColor = new BABYLON.Color4(1, 0, 0, 1);
                                    } else {
                                      box.material.emissiveColor = new BABYLON.Color4(1, 1, 1, 1);
                                    }

I have also added ellipsoid to the box but no difference

box.ellipsoid = new BABYLON.Vector3(0.5, 1.0, 0.5);
box.ellipsoidOffset = new BABYLON.Vector3(0, 1.0, 0);

 

What am I missing? 

[eboo]

mesh move collision work with box.moveWithCollisions(BABYLON.Vectro3D(...)) only

 

(i believe)

[GameMonetize]

eboo is correct

[Hagop]

bad news

 

[iiceman]

Have you tried to move the box and append the camera to the box?

[Hagop]

iiceman. I tried your suggestion  by adding keypress event listeners to the box and make the freecamera  to follow to the box but same problem. What do you mean by appending?

[Wingnut]

Hi Hagop.  I'm just saying hi, and wondering if you have had any success.  I think iceman meant... use mesh.moveWithCollisions to move your box with keypresses.  And parent the camera to the box... or use a follow[Arc]Cam targeted to follow the box. 

Here... http://www.babylonjs-playground.com/#LYCSQ#315   ...   is one of the nicest playgrounds EVER (not mine).  It uses cursor keys and its full-powered moveWithCollisions sits at line 166.  This uses a standard ArcRotateCam, but notice the sweet camera LERP in line 174 of the renderLoop.  That gives the camera a nice lagging follow, eh?  That's PRO stuff there, baby. 

Would your project work okay with ONLY the box having collisions, and no collisions on the camera itself?  Or do you NEED camera collisions (along with box collisions)?  Thoughts?

[Hagop]

Hi Wingnut

Thank you for the link. It looks great.

No need for parenting.No need for keyboard entry as well (freecamera silently listens to them). I didn't want to use movewithcollisions but non the less. Here is part of the code I used. I need to check rotations further...

scene.registerBeforeRender(function () {
                                                         
                    if(scene.isReady())
                        {
                        registerCameraPosition = scene.activeCamera.position.clone();
                        registerCameraRotation = scene.activeCamera.rotation.clone();
                   
                        
                        xDiff = registerCameraPosition.x - registerCamera_lastPosition.x;
                        yDiff = registerCameraPosition.y - registerCamera_lastPosition.y;
                        zDiff = registerCameraPosition.z - registerCamera_lastPosition.z;
                                                
                
                        globalCart.rotation.y = scene.activeCamera.rotation.y ;
                        globalCart.moveWithCollisions(new BABYLON.Vector3(xDiff,yDiff,zDiff));

[iiceman]

Yeah, Wingnut is right. I meant the parenting.. but well, if you update the camera position yourself, that's cool, too.