I’m a beginner/intermediate rhino/grasshopper user, and I’m having some trouble with flow along surface.
It’s difficult for me to match the orientation of my original object (heightfield image) from the flat surface onto my curvy surface. For some reason, often, it turns the image 90 degrees to the right. Sometimes it even puts the image on the back of the new surface, rather than the front.
Is there some kind of “checking workflow” so that you always know the new surface will be oriented correctly? Have done a bit of exploration with DIR, but am still having problems, and I’m not seeing a lot of documentation around this orientation issue.
In the image below, the straight image is mapped onto the curvy surface, but on the back side, not front side, and the orientation is upside down. Yikes! Please assist.
Thank you for this. Can you explain this in more detail – what arrows need to be aligned the same way, all three objects? base plane, the thing I’m trying to flow, and the target surface?
If so, having a little bit of trouble getting all the arrows to be the same, is there some kind of trick? Like, do I need to be flipping and orienting the objects in addition to toggling the arrow directions?
Sorry, I could not find a tutorial on the nuances of flow along surface anywhere…
Hi Delta - the command operates by mapping the objects to be flowed from the U, V and Normal of base surface to the U,V and Normal of the target. If you set the command line option for AutoAdjust to No, then those need to be alighed in the way you want the mapping to happen; but if AutoAdjust=Yes, and you pick on ‘corresponding’ corners of the base and target surfaces, the automapping generally does a good job. On a cylinder the correspnding corner will be by the vertical seam in the cylinder.
