Procedural instancing

[Nasyrov]

Hi. I want to rotate object inside FOR_ALL_GPOINTS in VRAY from one vector to another:

UT_Vector3 baseDir(1, 0, 0);

UT_Vector3 zDir(0, 0, 1);

UT_Matrix3 NRot;

UT_Matrix4 xform;

FOR_ALL_GPOINTS(gdpa, pointPtr)

{

.........................................

xform.identity();

NRot.dihedral(baseDir, zDir);

xform = NRot;

openGeometryObject();

setTransform(xform, 0);

.......................................

}

But all geos are disappear.

Thanks.

[sibarrick]

Is it because you are only setting the rotation and removing the transformation? Maybe you need to add back the original transformation data.

[Nasyrov]

Hi, Sibarrick!

I thinik, no. I want to rotate geometry in the origin. Any other transformation matrixs as translation or scale will be mult after that. Simply rotation.

Can you post some samples of right transformation?

Ok. The problem is in center of rotation... Geometry are running away with rotation of 0.5 and stay still with 0...

Edited August 18, 2008 by Nasyrov

[Nasyrov]

One kind of dihedral is dihedral with 3 vectors as args. It works but with strange result

Edited August 18, 2008 by Nasyrov

[atap3d]

Maybe your problem in setTransform(xform, 0)... In my tests transformation occurs in screen space. Does somebody know how to make the transformation in world space?