Creating poly selections for texture map

Helper

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 RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 24/05/2003 at 22:38, xxxxxxxx wrote:

User Information:
Cinema 4D Version:   8.100
Platform:   Windows ;
Language(s) :     C++ ;

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How can I create polygon selections to use with multiple materials on polygon objects? I get an instant crash trying to create a Tpolygon tag on a polygon object and the Tpolygonselection tag has no accessors that would let me set which polys are part of the set. No examples for these guys. I need two sets of groupings - one for surfaces to apply uv based textures to - and one denoting groups that I will be using to create bone weight maps later.

How can I divide up the model I've imported so I can properly texture it from within my plugin?

(where I can find samples, the sdk has gotten me up and running very fast!)

Thanks,
David

Helper

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 RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 25/05/2003 at 01:12, xxxxxxxx wrote:

Use SelectionTag::Alloc(Tpolygonselection) and then GetBaseSelect() to modify the selection. I think you need to call tag->Message(MSG_UPDATE) if you change anything.
You cannot create Tpolygon since there can only be one such tag. It shouldn't crash, but perhaps you don't check for NULL pointers?

Helper

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 RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 25/05/2003 at 08:45, xxxxxxxx wrote:

Thanks!
Once I knew what to go for - works like a charm.

How do you know which tags should be created by the calls in baseobject - should I use MakeVariableTag for a Tvertexmap for a bone weight map and it must be the size of the entire point array? Or is there a way to make a sparse array (like selection appears to be) for bone weights?

(Finally on to textures!)

Thanks,
David

Helper

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 RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 25/05/2003 at 08:46, xxxxxxxx wrote:

Thanks!
Once I knew what to go for - works like a charm.

How do you know which tags should be created by the calls in baseobject - should I use MakeVariableTag for a Tvertexmap for a bone weight map and it must be the size of the entire point array? Or is there a way to make a sparse array (like selection appears to be) for bone weights?

Inever got to check the null Tpolygon pointer - it never returned- I was using object->MakeVariableTag.

(Finally on to textures!)

Thanks,
David