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Technical Discussion » How do I load multiple sequences in a loop in a compositing network?
- catdog
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I would like to load a number of sequences into my compositing network (I have named each sequence with an iteratable folder name). I don't see a for loop available for this network. Can someone suggest how I might load this sequence?
Technical Discussion » How do I inspect the world transform of imported camera objects?
- catdog
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I would like to inspect the world to object transform of a pair of cameras imported via an alembic file. The cameras are clearly separated. If I jump into a camera to inspect it, the transform tab shows 0 rotation, translation and pivot. I am missing something, as these two cameras are definitely not at the world origin.
Can somebody tell me how I can inspect the true world transform of the camera objects I have imported?
Thanks!
Can somebody tell me how I can inspect the true world transform of the camera objects I have imported?
Thanks!
Technical Discussion » How do I reference a variable between img and obj networks?
- catdog
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I have a geometry node in my obj network group, and an image network in my img network. The image network contains a file op that loads an image for the current frame using the $F global variable (something like <my directory>/<my prefix>.$F6.png. I would like to add a custom variable to this path so that I can control the source directory. For example: <my directory>/<subdir>$MYVAR/<my prefix>.$F6.png
In my geometry network I am creating a custom SOP in C++. This SOP will pull the rastered data from the image network. I would like this SOP to determine which sub directory the image file rasters (in brief, controlling MYVAR).
Is using a global variable like this the correct approach? If so, how do I set an environment variable from a C++ SOP? I haven't found an API to do so yet.
Thanks!
In my geometry network I am creating a custom SOP in C++. This SOP will pull the rastered data from the image network. I would like this SOP to determine which sub directory the image file rasters (in brief, controlling MYVAR).
Is using a global variable like this the correct approach? If so, how do I set an environment variable from a C++ SOP? I haven't found an API to do so yet.
Thanks!
Technical Discussion » How do I manipulate a selection of point cloud points?
- catdog
- 10 posts
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I have a followup question. How do I then manipulate the selected points in a vex node?
I have created a group from my selected points, and input that to a vex node. For testing the vex node simply translates the points obtained from the global variables ‘P’ variable.
This configuration not only translates the selected points, but also the non-selected points. Can anyone tell me what is wrong, and why my vex node is applying it's change to all data instead of only the selected points?
I have created a group from my selected points, and input that to a vex node. For testing the vex node simply translates the points obtained from the global variables ‘P’ variable.
This configuration not only translates the selected points, but also the non-selected points. Can anyone tell me what is wrong, and why my vex node is applying it's change to all data instead of only the selected points?
Technical Discussion » Importing a point cloud into Houdini
- catdog
- 10 posts
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Problem solved. I has a rogue forward declaration of a camera in my ply file. The camera did not exist in the value list. Removing the forward declaration resolved the issue.
Thanks for the help!
Thanks for the help!
Technical Discussion » Importing a point cloud into Houdini
- catdog
- 10 posts
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Also, the density of my cloud seems to be much lower than in reality. Either the density has been reduced, or the artifact points I am seeing are the missing points, in an incorrect position.
Technical Discussion » How do I manipulate a selection of point cloud points?
- catdog
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Mart1jn, bonsak, thank you. That worked.
Tamte, the tutorial is useful. I must have missed it since it doesn't explicitly deal with point clouds. The technique is the same, though. Thanks
Tamte, the tutorial is useful. I must have missed it since it doesn't explicitly deal with point clouds. The technique is the same, though. Thanks
Technical Discussion » How do I manipulate a selection of point cloud points?
- catdog
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I have imported a point cloud. Inside my point cloud node, I have made a selection (a subset of the points in the cloud). I would like to translate these selected points by a given amount.
Can anyone suggest how I might do this? I connected the point cloud output to a transform node, but the transform considers the whole cloud.
Can anyone suggest how I might do this? I connected the point cloud output to a transform node, but the transform considers the whole cloud.
Technical Discussion » Importing a point cloud into Houdini
- catdog
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Thanks, that sort-of works.
I successfully imported the cloud. However, there is a repetitive pattern present in the Houdini visualization that is not present in the raw data (viewed in something like Meshlab or cloud compare). Also, there appear to be new points in a 3d grid pattern beyond the boundary of the imported points.
Any ideas on why these artifacts have been introduced?
I successfully imported the cloud. However, there is a repetitive pattern present in the Houdini visualization that is not present in the raw data (viewed in something like Meshlab or cloud compare). Also, there appear to be new points in a 3d grid pattern beyond the boundary of the imported points.
Any ideas on why these artifacts have been introduced?
Technical Discussion » Importing a point cloud into Houdini
- catdog
- 10 posts
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Caveat: I am very new to Houdini
I have generated a point cloud (I have either ply ascii, ply binary or pcd formats available), and I would like to import it into Houdini for manipulation.
Can anyone offer me guidance for where I should begin? I have found mention of relevant Vex nodes (pcimport etc), but they don't appear to be present in my vex node list.
I have generated a point cloud (I have either ply ascii, ply binary or pcd formats available), and I would like to import it into Houdini for manipulation.
Can anyone offer me guidance for where I should begin? I have found mention of relevant Vex nodes (pcimport etc), but they don't appear to be present in my vex node list.
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