About engine.world.getIntersection

[shaopeng.chen]

I want to detect trees in the scene。 However the tree type is ObjectMeshClutter, how can detect them? 

when I use this code to detect. 

int result = engine.world.getIntersectionObjects(ttP0,ttP1,ret);
//int result = engine.world.getIntersection(ball_boundBox,-1,ret);
if(result != 0)
{
    if( ret.size()!= 0) 
    {
        log.message("------------------------------------------------------------------------%d\n",ret.size());
        int exclude[0];
        exclude.clear();
        Node nearest = NULL;
        forloop(int i = 0; ret.size()) {
            Node n = node_cast(ret[i]);
            if(n != NULL && n.getTypeName() == "ObjectMeshClutter"){
                log.message("hit name: %30s -> %s  %s  %s\n",n.getName(), n.getTypeName(),typeinfo(ttmp.getWorldPosition())));
            }
        }
        log.message("------------------------------------------------------------------------\n");             
    }
}

  

the result is:

hit name:                spruce1_clutter -> ObjectMeshClutter  dvec3: -4096 -4096 0  dmat4: (1 0 0 0) (0 1 0 0) (0 0 1 0) (-4096 -4096 0 1)
hit name:         blooming_sally_clutter -> ObjectMeshClutter  dvec3: -4096 -4096 0  dmat4: (1 0 0 0) (0 1 0 0) (0 0 1 0) (-4096 -4096 0 1)
hit name:         tormentil_dead_clutter -> ObjectMeshClutter  dvec3: -4096 -4096 0  dmat4: (1 0 0 0) (0 1 0 0) (0 0 1 0) (-4096 -4096 0 1)
hit name:         blooming_sally_clutter -> ObjectMeshClutter  dvec3: -4096 -4096 0  dmat4: (1 0 0 0) (0 1 0 0) (0 0 1 0) (-4096 -4096 0 1)
hit name:               camomile_clutter -> ObjectMeshClutter  dvec3: -4096 -4096 0  dmat4: (1 0 0 0) (0 1 0 0) (0 0 1 0) (-4096 -4096 0 1)
hit name:     stone3_color3_mesh_clutter -> ObjectMeshClutter  dvec3: -4096 -4096 0  dmat4: (1 0 0 0) (0 1 0 0) (0 0 1 0) (-4096 -4096 0 1)
hit name:                 ledum2_clutter -> ObjectMeshClutter  dvec3: -4096 -4096 0  dmat4: (1 0 0 0) (0 1 0 0) (0 0 1 0) (-4096 -4096 0 1)
hit name:         blooming_sally_clutter -> ObjectMeshClutter  dvec3: -4096 -4096 0  dmat4: (1 0 0 0) (0 1 0 0) (0 0 1 0) (-4096 -4096 0 1)
hit name:         blooming_sally_clutter -> ObjectMeshClutter  dvec3: -4096 -4096 0  dmat4: (1 0 0 0) (0 1 0 0) (0 0 1 0) (-4096 -4096 0 1)
hit name:               camomile_clutter -> ObjectMeshClutter  dvec3: -4096 -4096 0  dmat4: (1 0 0 0) (0 1 0 0) (0 0 1 0) (-4096 -4096 0 1)
hit name:         tormentil_dead_clutter -> ObjectMeshClutter  dvec3: -4096 -4096 0  dmat4: (1 0 0 0) (0 1 0 0) (0 0 1 0) (-4096 -4096 0 1)
hit name:                 birch1_clutter -> ObjectMeshClutter  dvec3: -4096 -4096 0  dmat4: (1 0 0 0) (0 1 0 0) (0 0 1 0) (-4096 -4096 0 1)
hit name:         tormentil_dead_clutter -> ObjectMeshClutter  dvec3: -4096 -4096 0  dmat4: (1 0 0 0) (0 1 0 0) (0 0 1 0) (-4096 -4096 0 1)
hit name:         blooming_sally_clutter -> ObjectMeshClutter  dvec3: -4096 -4096 0  dmat4: (1 0 0 0) (0 1 0 0) (0 0 1 0) (-4096 -4096 0 1)
hit name:               camomile_clutter -> ObjectMeshClutter  dvec3: -4096 -4096 0  dmat4: (1 0 0 0) (0 1 0 0) (0 0 1 0) (-4096 -4096 0 1)
hit name:         blooming_sally_clutter -> ObjectMeshClutter  dvec3: -4096 -4096 0  dmat4: (1 0 0 0) (0 1 0 0) (0 0 1 0) (-4096 -4096 0 1)
hit name:              tormentil_clutter -> ObjectMeshClutter  dvec3: -4096 -4096 0  dmat4: (1 0 0 0) (0 1 0 0) (0 0 1 0) (-4096 -4096 0 1)
hit name:             ledum_dead_clutter -> ObjectMeshClutter  dvec3: -4096 -4096 0  dmat4: (1 0 0 0) (0 1 0 0) (0 0 1 0) (-4096 -4096 0 1)
hit name:                 ledum2_clutter -> ObjectMeshClutter  dvec3: -4096 -4096 0  dmat4: (1 0 0 0) (0 1 0 0) (0 0 1 0) (-4096 -4096 0 1)
hit name:     stone3_color3_mesh_clutter -> ObjectMeshClutter  dvec3: -4096 -4096 0  dmat4: (1 0 0 0) (0 1 0 0) (0 0 1 0) (-4096 -4096 0 1)
hit name:                spruce1_clutter -> ObjectMeshClutter  dvec3: -4096 -4096 0  dmat4: (1 0 0 0) (0 1 0 0) (0 0 1 0) (-4096 -4096 0 1)
hit name:      tormentil_flowers_clutter -> ObjectMeshClutter  dvec3: -4096 -4096 0  dmat4: (1 0 0 0) (0 1 0 0) (0 0 1 0) (-4096 -4096 0 1)

So I'm confused,how to detect nodes that whose type is ObjectMeshClutter bewteen two point.

 

[silent]

Hello!

I'm afraid, it's not possible to intersect with single tree from ObjectMeshClutter. In 2.6 we will add couple of methods to API that will allow you to get all transformation matricies of all rendered on screen objects in clutter. That probably, can help a bit in some cases.

Thanks!

[shaopeng.chen]

On 2017/9/21 at 8:58 PM, shaopeng.chen said:

ObjectMeshClutter

Thank you very much. I know PlayerActor can't move through the tree whose type is ObjectMeshClutter , so how can I move a camera like PlayerActor ?

[silent]

You can move PlayerActor if you will remove collision flag from clutter. Or you can use PlayerSpectator for this task.

Thanks!