Hello, everybody. I'm a new soya user, and I was surprised because it
was so easy to develop a simple 3D app. I had a kind of respect for the
field, but the soya tutorials made the learning curve almost flat. Up to
this moment, whenever I had a problem, I found that the authors had
already though about it and offered a good solution. The embedded
CoordSyst really make most tasks simple. And there is probably one
'soya' solution to the problem I have now, but I couldn't find it.
I understand soya does not use matrices, and there is one thing I
don't know how to do without them. I need to set the full orientation of
an object in 3D space. I can set the position, and I can use the
'look_at' method to set the z-vector of the CoordSyst to the one I need,
but I also need to set the x-vector, and I found that if I set the
z-vector first with the look_at method and then the x-vector with the
look_at_x method, the second call sends the z-vector to an arbitrary
position.
In [2]: soya.CoordSyst.look_at_x?
Type: method_descriptor
Base Class: <type 'method_descriptor'>
String Form: <method 'look_at_x' of '_soya.CoordSyst' objects>
Namespace: Interactive
Docstring:
CoordSyst.look_at_x(target)
Rotate so that this object's positive-X points at target.
So what is the soya way to set all the position, the z-vector and the
x-vector (provided, of course, that the two vectors are orthogonal)?
Thank you very much
Pablo
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