changing offset of a p2 shape without reapplying the whole shape?

[valueerror]

if this is even possible how do i accomplish this?

thx in advance!

[BigRob154]

Did you looked into body's shapeOffsets?

    /**     * The local shape offsets, relative to the body center of mass. This is an     * array of Array.     * @property shapeOffsets     * @type {Array}     */    this.shapeOffsets = [];

I started to look into Phaser's source, there you'll find lot of answers in general.

[valueerror]

i often browse the source hoping to find answers.. i also read the p2 documentation..  but even if i found something like  this.shapeOffsets = [];  i wouldn't know how to use it..  

[BigRob154]

"shapeOffsets" is an array of points which describes each shape's offset from the sprite, as far as I know.

// pseudo codeshapeOffsets = [[shape1_x, shape1_y], [shape2_x, shape2_y]];

When you want to change the shape's offset without creating new geometry you need to change these offsets, imho.

Otherwise just ask @schteppe, he's the creator of P2.js.

[valueerror]

thank you very much.. i decided to delete and recreate the circle instead of changing radius and offset of the existing circle.

even if it's more expensive..

[valueerror]

push*

 

once again i ran into this problem..   can't be that i can change the size of the shape on the fly but not it's offset..

 

 

does anyone know how this is done or.. if this can be done?

[wayfinder]

As far as I can tell, you need to supply shapeOffsets with a p2 vec2, and you may need to update the AABB and bounding radius after you change the offset. I haven't tested this myself, but this should be the correct way:

 

var myOffset = p2.vec2.fromValues(-1, -1); // this creates a vector that points 20 px to the right and 20 px downp2body.shapeOffsets[0] = myOffset; // this assigns the vector to the first shape's shapeOffset. note that this is a property of the p2body (so phaserbody.data)p2body.updateAABB();p2body.updateBoundingRadius();