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Showing results for tags 'pointcloud'.
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Hi, I'm searching for a way to create a pointcloud from rendered geometry. More or less it was possible with prman where I was able to save point positions with rendered color information during rendering (or in a pre render pass). Same procedure worked in more ore less in mentalray. Can I do it in mantra as well? The result should be a camera independent point clouds with rgb and position data.
magneto posted a topic in General Houdini QuestionsHi, I know point clouds can be used to blend/average attributes within the radius of each point. Is there a way to do the same where it only does this if: 1. A point is connected to the same surface as the current point. and 2. A point is within X units distance on the surface from the current point. Not point to point straight line distance, but the shortest surface distance between 2 points on the surface. I am not sure if there is a proper name for this. Not the best pic but something that looks like this: As you can see the length of the shortest path that lie on the surface. The surface can be polygons or NURBS. This can't be faked with neighbour functions as edges are too coarse. Can this be done using point clouds? If not, VEX? If not, then any other solutions in Houdini? It's gonna be a per point operation though just like VEX/VOPs. Thanks
A VOP performs a pointcloud lookup and uses while loop in oder to take advandage of the pcimport node to get distance,ptnum ,P etc. How can I store the result of each loop in a while node in vops? Each loop gives me a point but I only get the last point out of the node( although I have set max number of points to a number higher than one.. ) Maybe somehow push/append them into an array so I can call the later on? If that is the way, arrays in vops need inline code (afaik..) and I haven't managed to figure i out... One of my goals is to draw multiple lines that connect the look up point with a number of points on the pointcloud(= max number of points) without puting the VOP and the Foreach node into another ForEach node out side the vop (because it is not fast). I hope all this makes sense ......thanks ps. play a bit with the slider of "max number of points". Slide it from 1 to 4 and you'll see the line jumbing to the next point. I want to be able to store these points without movin the slider.. Push in array.hip