find y position on mesh
Blitz3D Forums/Blitz3D Programming/find y position on mesh
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how can i find the height (y position) of any given xz point on a terrain mesh, like say for calculating shadows? do you use linepick? what other ways are there? tformpoint? thanks. |
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***EDIT...Ignore...I misunderstood your question... if you position a pivot over the spot that you want the height then linepick straight down, pickedy#() will give you the height at that point x,y. I assume that you are talking about using a mesh as a terrain and not using the blitz3d terrain object. |
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For terrains (not meshes) there's the terrainY() function. With meshes it may be the easiest way to do a linepick. A pivot is not required, but the mesh must be pickable (EntityPickMode m,2). Do something like: pick=linepick(x,100,z,0,-200,0,0.1) if pick=mymesh then print pickedx()+" "+pickedy()+" "+pickedz() endif make sure to use the minimum for y and height, so the pick range is as low as possible. |
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thanks to you both. i was confused about how linepick works, but i have it working now. yes i meant for a mesh not a terrain. i had written another way to get the y position but it wasn't reliable as it assumed the mesh vertices were in a particular order. |