supereggbert / jiglibjs Goto Github PK

Is there a way to prevent a body from rotating? This is mostly useful for solid player objects (think zelda in Ocarina of Time).

Hey,

I'm pretty new at WebGL and so I started learning by reading example code of three.js. Finally I didn't only want to watch my created cube rotate, but to behave like a fully realistic cube and that's how I got to use JigLibJS so far.

But I'm experiencing problems by integrating JigbLib into my three.js code.
I gathered information and snippets from some examples but still the cube I created just don't want to fall down to the ground I created.
Maybe I'm messing something up with the updateMatrixWorld-Method?

The code can be found here: http://pastebin.com/9tDrz7dd

Hi,

I've noticed that the Matrix3D class (jiglib/maths/matrix3d.js) possibly has a bug in the appendRotation() and angleAxis() functions. The conversion from degrees to angles is done with angle=angle/(pi_2), whereas it should be angle=angle_pi/180 (or angle_2_pi/360). I am also wondering why in the appendRotation() function you negate the axis of rotation (Vector3DUtil.negate(axis)).
If, for example, I set the rotation angles [10, 20, 30] of an object and I apply inverse transformations to the orientation matrix I get the rotation angles [350, 340, 330](with degrees/radians conversion fixed). If I comment the axis negation part I get the right values ([10, 20, 30]).

Regards,
Gabriel

Hi, I am creating a bunch of JBoxes and then setting them high above a JPlane. When they fall, they collide with each other and the plane, but they do not rotate. I don't understand why there is no rotation on impact?

I have pasted my code here: http://pastebin.com/gFabjbU6

Hi,

I've made a little scenario consisting of a sphere and a plane (with normal (0, 1, 0) and distance 0, so the xOz plane). The system has a gravity of [0, -9, 0]. The ball is positioned slightly above (in the positive Y direction) the plane with an initial velocity on the X-axis. There is a friction coefficient set for both the ball and the plane. I would expect the ball to 'fall' onto the plane and continue its movement in parallel with the X-axis, but slowly decreasing its velocity because of the friction.
I am unable to obtain this behavior using the friction parameter. No matter what I set for the friction parameters, the system behaves as if there were no friction at all.
I am curious why this happens.

I've pasted the code here: http://pastebin.com/x8sTYRaD

Regards,
Gabriel