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Work in Progress » The Floating Islands of Houdini 16 - A beginners approach
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- David_Kahl
- 15 posts
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Work in Progress » The Floating Islands of Houdini 16 - A beginners approach
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- David_Kahl
- 15 posts
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Technical Discussion » Houdini Console Error --> mantra: Can't find geometry
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- David_Kahl
- 15 posts
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Technical Discussion » Houdini Console Error --> mantra: Can't find geometry
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- David_Kahl
- 15 posts
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Work in Progress » The Floating Islands of Houdini 16 - A beginners approach
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- David_Kahl
- 15 posts
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This time I create a small stone wall that runs along a curve. For that to work you need the Normals also to align along that curve.
And as an additional step I randomize the placement by using a Goup Expression node.
And as an additional step I randomize the placement by using a Goup Expression node.
Technical Discussion » Houdini Console Error --> mantra: Can't find geometry
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- David_Kahl
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So I am a bit puzzled…
I was working on file for while now and wanted to create a quick WIP render.
But after setting it up I get a Popup with the Houdini Console saying this:
I thought I might have done something wrong in the nodes but I created a fresh geo node with only a box in it - same problem.
Deleted Mantra, deleted the camera … nothing.
Is the project File lost?
I was working on file for while now and wanted to create a quick WIP render.
But after setting it up I get a Popup with the Houdini Console saying this:
mantra: Can't find geometry /obj/geo/copy1
Invalid detail specified
I thought I might have done something wrong in the nodes but I created a fresh geo node with only a box in it - same problem.
Deleted Mantra, deleted the camera … nothing.
Is the project File lost?
Work in Progress » The Floating Islands of Houdini 16 - A beginners approach
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- David_Kahl
- 15 posts
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edward
FYI, you can just do TAB > Box in the network view even when you're at the Scene level. This avoids needing to do the extra step of deleting the File node inside.
Ahh - thanks!
Work in Progress » The Floating Islands of Houdini 16 - A beginners approach
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- David_Kahl
- 15 posts
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Work in Progress » The Floating Islands of Houdini 16 - A beginners approach
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- David_Kahl
- 15 posts
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I finish up the creation process for the main island in this Houdini project. The mesh will be the basis for future steps.
To do this I generate a color gradient and use it to drive the displacement. There is an interesting VEX related conversion issue you need to be aware of if you try that expression.
Episode 1
Episode 2
To do this I generate a color gradient and use it to drive the displacement. There is an interesting VEX related conversion issue you need to be aware of if you try that expression.
Episode 1
Episode 2
Edited by David_Kahl - March 22, 2017 04:24:51
Work in Progress » The Floating Islands of Houdini 16 - A beginners approach
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- David_Kahl
- 15 posts
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I did of course wrote with him first - to tell him what I have in mind.
My small series will be no complete replacement of his work. He goes more indepth with the tools and even does extra explanation videos on topics like the fur generation.
My small series will be no complete replacement of his work. He goes more indepth with the tools and even does extra explanation videos on topics like the fur generation.
Edited by David_Kahl - March 11, 2017 14:01:42
Work in Progress » The Floating Islands of Houdini 16 - A beginners approach
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- David_Kahl
- 15 posts
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The first episode about my building process of the floating islands of houdini. It is based on a workshop created by Rohan Dalvi. A very detailed indepth course about the tools you need for this project.
My goal with this video series is my own learning and take you with me on that journey. I also going to bring as much of my own ideas into this as possible.
Also I am going to update the techniques to the Houdini 16 version. For example I am going to make heavy use of the VEX language and replace all older nodes like point sops.
Since I am a beginner myself this series will also be more suited for beginners BUT I am happy for every experienced Houdini user that might chip in with tips and tricks that could help in this project.
I want to emphasize that I DON'T want to just copy the content of the course. The workshop of Rohan Dalvi will be still relevant because of his great work as a tutor.
This video series will let you accompany me while I try to apply the learned techniques and take different approaches like using vex whenever I can.
My goal with this video series is my own learning and take you with me on that journey. I also going to bring as much of my own ideas into this as possible.
Also I am going to update the techniques to the Houdini 16 version. For example I am going to make heavy use of the VEX language and replace all older nodes like point sops.
Since I am a beginner myself this series will also be more suited for beginners BUT I am happy for every experienced Houdini user that might chip in with tips and tricks that could help in this project.
I want to emphasize that I DON'T want to just copy the content of the course. The workshop of Rohan Dalvi will be still relevant because of his great work as a tutor.
This video series will let you accompany me while I try to apply the learned techniques and take different approaches like using vex whenever I can.
Houdini Learning Materials » Houdini 16 - Learning path
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- David_Kahl
- 15 posts
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Rohan Dalvi has some good ones out there. I am currently working through his “Floating Islands” and going to do a beginners approach series on that project on youtube.
Also fairly new on houdini.
Also fairly new on houdini.
Houdini Indie and Apprentice » Replacing old point sops with wrangles
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- David_Kahl
- 15 posts
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Thanks for the answer. 
The solution was something else. I tried @ptnum and @numpt but since it did't work I thought they were wrong.
Silly me tried this: @Cd.x = 1 - @ptnum/@numpt;
Which looks right but will not work because of int -> float.
I needed to do this:
float val1 = @ptnum;
float val2 = @numpt;
@Cd.x = 1 - val1/val2;
Regards
Dave

The solution was something else. I tried @ptnum and @numpt but since it did't work I thought they were wrong.
Silly me tried this: @Cd.x = 1 - @ptnum/@numpt;
Which looks right but will not work because of int -> float.
I needed to do this:
float val1 = @ptnum;
float val2 = @numpt;
@Cd.x = 1 - val1/val2;
Regards
Dave
Houdini Indie and Apprentice » Replacing old point sops with wrangles
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- David_Kahl
- 15 posts
- Offline
Hello together,
I am working through a H13 tutorial at the moment and it's using the old point sops frequently.
Most of them I could easily replace with an attribute wrangle but there is one that keeps fighting against me.
After a sort the point sop is coloring a 2D area with an Add Color and the expression 1-$PT/$NPT which makes the point in the center a clear red and the points at the border and farthest away almost black.
I tried this with the wrangle but to no success. I assumed it would have to look like this:
@Cd = set(@elemnum/@npt,0,0);
Since I am fearly new to houdini I look forward to any advise.
Regards
Dave
I am working through a H13 tutorial at the moment and it's using the old point sops frequently.
Most of them I could easily replace with an attribute wrangle but there is one that keeps fighting against me.
After a sort the point sop is coloring a 2D area with an Add Color and the expression 1-$PT/$NPT which makes the point in the center a clear red and the points at the border and farthest away almost black.
I tried this with the wrangle but to no success. I assumed it would have to look like this:
@Cd = set(@elemnum/@npt,0,0);
Since I am fearly new to houdini I look forward to any advise.

Regards
Dave
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