Displacement Mapping / Selection Tags

[Helper]

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 RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 17/05/2003 at 11:20, xxxxxxxx wrote:

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

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I already made it work seemling the same as C4D's internal algorithm.

Before I say the algorithm seems odd at best, I would like to hear why it works the way it does.

It is odd at best. ( i couldn't wait )

bt

[Helper]

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 RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 23/05/2003 at 21:29, xxxxxxxx wrote:

The algorithm is dependent on the order of points/faces. First an index array points->polys is generated:

    
    
      for (j=0; j<op->vcnt; j++)  
      {  
       pind[op->vadr[j].a] = j;  
       pind[op->vadr[j].b] = j;  
       pind[op->vadr[j].c] = j;  
       pind[op->vadr[j].d] = j;  
      }

Then the displacement is calculated for each point, using the face entered into 'pind':

    
    
      for (j=0; j<op->pcnt; j++)  
      {  
       op->padr[j] = Displace(op,op->padr[j],pind[j]);  
      }

Only if the face pind[j] is in the selection map is the displacement evaluated.