Can't find out what am I missing....

Debuging a sample code I found these lines and dump it to console to understand what is going wrong:

        var intPosition = new THREE.Vector3( Math.floor(result.point.x), 0, Math.floor(result.point.z) );
        console.log(intPosition);
        brush.position = intPosition.clone().add(new THREE.Vector3(0.5, 0.5, 0.5) );
        console.log(brush.position);

but.......... the output is as follow (from firebug console):

Object { x=0, y=0, z=10, more... }
Object { x=0, y=0, z=0, more... }

from three.js docs:

.add ( v ) this

Adds v to this vector.

and here:

add: function ( v1, v2 ) {

    this.x = v1.x + v2.x;
    this.y = v1.y + v2.y;
    this.z = v1.z + v2.z;

    return this;

},

What's wrong? Is it the integer+float failling on js?

EDIT NOTE:

I don't know if it is relevant but this issue occurs on my current version (revision 71) of Three.js, working fine on older versions (r60 or lower).

Can't find out what am I missing....

Debuging a sample code I found these lines and dump it to console to understand what is going wrong:

        var intPosition = new THREE.Vector3( Math.floor(result.point.x), 0, Math.floor(result.point.z) );
        console.log(intPosition);
        brush.position = intPosition.clone().add(new THREE.Vector3(0.5, 0.5, 0.5) );
        console.log(brush.position);

but.......... the output is as follow (from firebug console):

Object { x=0, y=0, z=10, more... }
Object { x=0, y=0, z=0, more... }

from three.js docs:

.add ( v ) this

Adds v to this vector.

and here:

add: function ( v1, v2 ) {

    this.x = v1.x + v2.x;
    this.y = v1.y + v2.y;
    this.z = v1.z + v2.z;

    return this;

},

What's wrong? Is it the integer+float failling on js?

EDIT NOTE:

I don't know if it is relevant but this issue occurs on my current version (revision 71) of Three.js, working fine on older versions (r60 or lower).

• javascript
• three.js

1 Answer 1

You have to use the .set() method of Vector3 class.

var brushPosition = intPosition.clone().add(new THREE.Vector3(0.5, 0.5, 0.5) );
brush.position.set(brushPosition.x, brushPosition.y, brushPosition.z);

You might also be able to use the copy function of Vector3 class.

brush.position.copy(intPosition.clone().add(new THREE.Vector3(0.5, 0.5, 0.5));

EDIT: the reason is that the position property of object3D is non-writable. it may not be set with an assignment operator.