ModelrotatorVisual3D - Printable Version

ModelrotatorVisual3D - Printable Version

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ModelrotatorVisual3D - kreativasas - 03-24-2020

Hi,
I'm using a modelrotator with a standardTransform3D to rotate objects.
I follow the example ducks lake but i can't find where is defined the rotation center!!

Somebody can help me?

RE: ModelrotatorVisual3D - abenedik - 03-25-2020

StandardTransform3D always rotates around (0,0,0).

This means that to rotate (and scale) your model correctly, the model (its mesh) needs to be defined in such a way that the center of the model (mesh) is at (0,0,0).

If you put a breakpoint to a line after the _duckModel3D is loaded and when the breakpoint is hit open the Immediate window. There write the following:

_duckModel3D.Dump()

and you will get the details about the model - for example (here is only the first part):

Code:
Bounds: X:       -0.16  Y:        0.00  Z:       -0.11

        SizeX:    0.32  SizeY:    0.30  SizeZ:    0.22

Center: X:        0.00  Y:        0.15  Z:        0.00

So the center of the duck is at (0, 0.15, 0) - ok when rotating around vertical axis (0,1,0).

Note that if you have a more complicated hierarchy of objects, you can also use _duckModel3D.DumpHierarchy()

RE: ModelrotatorVisual3D - kreativasas - 03-25-2020

(03-25-2020, 03:02 PM)abenedik Wrote: StandardTransform3D always rotates around (0,0,0).

This means that to rotate (and scale) your model correctly, the model (its mesh) needs to be defined in such a way that the center of the model (mesh) is at (0,0,0).

If you put a breakpoint to a line after the _duckModel3D is loaded and when the breakpoint is hit open the Immediate window. There write the following:

_duckModel3D.Dump()

and you will get the details about the model - for example (here is only the first part):

Code:
Bounds: X: -0.16 Y: 0.00 Z: -0.11 SizeX: 0.32 SizeY: 0.30 SizeZ: 0.22 Center: X: 0.00 Y: 0.15 Z: 0.00

So the center of the duck is at (0, 0.15, 0) - ok when rotating around vertical axis (0,1,0).

Note that if you have a more complicated hierarchy of objects, you can also use _duckModel3D.DumpHierarchy()

I'm not sure that i understand it correctly. But i don't need to rotate the obj using his center but i need to rotate it using a fixed point on the view. Is it possible?
Maybe using a RotateTransform3D?

RE: ModelrotatorVisual3D - kreativasas - 03-25-2020

Thanks! Solved using RotateTransform3D