Hi,
To achieve it, you can multiply locator transforms on
M3dView.modelViewMatrix().inverse()
I use the following to keep my MPxManipulatorNode (circle) oriented on
camera (partial copy/paste from draw() method) It's c# but on python
workflow the same.
public override void draw(M3dView view, MDagPath path,
M3dView.DisplayStyle style, M3dView.DisplayStatus status)
{
.....
MMatrix modelViewMatrix = new MMatrix();
view.modelViewMatrix(modelViewMatrix);
.....
OpenGL.glLineWidth(3);
OpenGL.glBegin(type);
for (double i = 0; i < 2 * M_PI; i += M_PI / CIRCLE_SIDES_NUM)
{
MPoint circlePoint = new MPoint(Math.Cos(i) * radius,
Math.Sin(i) * radius, 0.0);
MVector circlePointVector = new MVector(circlePoint);
circlePointVector =
circlePointVector.multiply(modelViewMatrix.inverse);
OpenGL.glVertex3d(circlePointVector.x + center.x,
circlePointVector.y + center.y, circlePointVector.z + center.z);
}
OpenGL.glEnd();
}
I hope this will help.
Best Regards,
Serge Scherbakov
среда, 22 января 2014 г., 13:55:14 UTC+4 пользователь Dilen Shah написал:
>
> Hey guys,
>
> I am trying to learn how to create a shape that always faces the camera. I
> have created before a locator which has its name facing the camera always
> but how can i do it with the whole shape itself?
>
> Any ideas?
>
> D.
>
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