Question

I’ve been trying out sheetengine 1.2.0 but when i create an object and rotate it, it seems to slowly drift towards the camera.

I’m using methods seen in the examples and according to the documentation this should be fine.

// move object around
            var maxsteps = 10;
            var direction = {x:5, y:0, z:0};
            var rotate = true;
            setInterval(function() 
            {
                lolwut.rotate({x:1, y:0, z: 1}, Math.PI/2/maxsteps);

                // calculate sheets and draw scene
                sheetengine.calc.calculateChangedSheets();
                sheetengine.drawing.drawScene();
            }, 30);

There is no current issue on the codeplex page that seems to match what i’m seeing.

Am i doing something wrong?

JsFiddle here

Answer 1

It pretty much seems that the axis you provide has to be normalized. The axis in your example after normalization would look something like this:

lolwut.rotate({x:Math.sqrt(2)/2, y:0, z: Math.sqrt(2)/2}, Math.PI/2/maxsteps);

I consider this a bug, although the workaround is trivial. I have updated the documentation on codeplex accordingly.