yep, that´s one of the "additional assumptions" I spoke about.

AGGGGHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH!

Im an IDIOT. Kill me now

float h1=V3GetBezierDepthFromPoint(UXO,UYO);
float h2=V3GetBezierDepthFromPoint(UXO+I,UYO);
float h3=V3GetBezierDepthFromPoint(UXO,UYO+I);
float h4=V3GetBezierDepthFromPoint(UXO+1,UYO+1);<<DOH!

After 15 years experiance how can i make such a silly mistake as to confuse I and 1

A simple interpolate:
float h5=Interpolate(h1,h2,clx);
float h6=Interpolate(h3,h4,clx);
return Interpolate(h5,h6,cly);
Now does the job.


Thanks for all your help and patients guys!!

Next stop... Water!

Hey, where are you all going??

:P