I'm trying to set up some simple architecture as a digital asset which so far consists of walls, floors and ceilings and now I'm on to cutting out the windows and doors.
I want to expose a parameter that allows for multiple input meshes, that the digital asset loops through and subtracts from the wall geometry from a boolean.
Can anyone tell me how to go about doing this? I have a custom path attribute working nicely for the wall path, but I can't work out how to import door and window geometry when there could be any number of them.
Thanks in advance!
Multiple booleans from params
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- iainjchambers
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- neil_math_comp
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If you just want to do subtractions, it should work to use the Merge node to put all of the geometry to subtract into a single detail, since Boolean can subtract an arbitrary number of connected components from something in a single node. Then, the asset would hopefully only need an input for the geometry to subtract. Would that work?
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- iainjchambers
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- neil_math_comp
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Does the attached HIP file give a better idea of what I meant?
You can use the Merge SOP to collect all of the cutting geometry into a single detail, then make all of the subtractions in a single Boolean. If you're making an asset and you want people to be able to provide geometry to subtract, you don't need n inputs for n subtractions, you just need 1 to receive all of the geometry to subtract.
You can use the Merge SOP to collect all of the cutting geometry into a single detail, then make all of the subtractions in a single Boolean. If you're making an asset and you want people to be able to provide geometry to subtract, you don't need n inputs for n subtractions, you just need 1 to receive all of the geometry to subtract.
Edited by neil_math_comp - 2017年6月5日 15:41:55
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- Konstantin Magnus
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I would not recommend booleans for that. Instead of cutting through geometry I´d rather set up and make use of existing polygons. It performs way better and is more stable, as well. Here is an alternative procedure:
1) A sine wave runs across all sides of a box.
2) By multiplying the wave you get a facade pattern.
3) Color ranges can be used to isolate specific building parts.
4) Extruding each part with different thickness values.
1) A sine wave runs across all sides of a box.
2) By multiplying the wave you get a facade pattern.
3) Color ranges can be used to isolate specific building parts.
4) Extruding each part with different thickness values.
https://procegen.konstantinmagnus.de/ [procegen.konstantinmagnus.de]
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- iainjchambers
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Konstantin Magnus, that is really freaking cool and I'd love to put that technique to good use but I'm afraid that it parted my hair as it sailed over my head. I'm just getting started with Houdini and you lost me at sine wave.
That said, if you know of a tutorial or a set of tutorials that could help me to better understand what you've done there, I'd be incredibly grateful.
That said, if you know of a tutorial or a set of tutorials that could help me to better understand what you've done there, I'd be incredibly grateful.
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- iainjchambers
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ndickson that's what I'm after and I'd gotten that far but I want the goemetry that I'm cutting out to come from a multiparam folder in the asset's interface.
Here's my intention, just to clarify; what I want to do is create a wall from a curve in UE4 much like the one outlined in this superb tutorial [www.gametutor.com], and then place my window/door assets and feed those into the wall asset params to cut the holes for them. By doing so, I hope to have a parametric wall tool which I can use to create game levels.
Is that possible?
Here's my intention, just to clarify; what I want to do is create a wall from a curve in UE4 much like the one outlined in this superb tutorial [www.gametutor.com], and then place my window/door assets and feed those into the wall asset params to cut the holes for them. By doing so, I hope to have a parametric wall tool which I can use to create game levels.
Is that possible?
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- neil_math_comp
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Sorry for taking so long to reply! There may or may not be a way to do it with just an Object Merge, since it's tantalizingly close to doing what you want, but I'm not sure. However, it can definitely be done with a For Loop block. Set the Iterations parameter to channel reference the multiparm parameter representing the count, change Gather Method to Merge Each Iteration, change Method on the Block Begin to Fetch Metadata, then Object Merge using the “iteration” detail attribute.
The attached file gives a bit of an example. I changed the First Instance number on the multiparm parameter (in the edit parameter interface dialog) to be 0 instead of 1, for simplicity. If you keep it at 1, you'll need to add 1 to the
The attached file gives a bit of an example. I changed the First Instance number on the multiparm parameter (in the edit parameter interface dialog) to be 0 instead of 1, for simplicity. If you keep it at 1, you'll need to add 1 to the
detail(...)expression, but in parentheses, like (detail(...)+1), so that it doesn't just append “1” to the string.
Edited by neil_math_comp - 2017年6月15日 18:12:21
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- plabill23
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