Xpresso TP

THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 06/07/2004 at 02:29, xxxxxxxx wrote:

User Information:
Cinema 4D Version:   8.100 
Platform:      
Language(s) :   C.O.F.F.E.E  ;

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I'm trying to orient particles the same direction as some face normals. The problem is that the alignment must be defined as a Matrix. And the normal is a Vector. How can I change a simple vector into a matrix?
And why tha hell must the alignment be defined as a Matrix?!?! Couldn't it be simply a vector? Thank you very much in advence.

Rui Batista

THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 06/07/2004 at 02:31, xxxxxxxx wrote:

Oh, and why doesn't the PSurfacePosition have an option to automatically orient the particles the same way as the normals?!?

Rui Batista

THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 07/07/2004 at 20:34, xxxxxxxx wrote:

Tha orientation isn't uniquely determined by a single vector, since the particle could have a bank angle as well. You can get one of the possible orientations by HPBToMatrix(VectorToHPB(v)), or you can build the matrix yourself using cross products.
The options for PSurfacePosition available in the API reflect those available in the application. So please direct questions about the existing features to one of the user forums, or to the suggestions form. (I wouldn't know much more than you about TP... ;-)