Hi all, In order to extrude a 2D face along a curve I'm using the inverse of the lookAt transformation. The 2D face has a fixed normal of (0,0,-1) and up vector of (0,1,0). The lookAt method does a great job of placing the 2D face at the correct point along the curve and rotating it so the face's normal points along the curve's tangent.
Unfortunately, the lookAt transformation also rotates the 2D object by 180degs around its normal under certain conditions. This gives the finished 3D curve amuzing, but unwanted twists. Does anyone know how the lookAt method works, under what circumstances the twist might occur or a better way of extruding a 2D face along a curve? Thanks for any light you can throw on this, Mark =========================================================================== To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff JAVA3D-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help".
