This is what im creating, its a simple chain and im wanting weight on a few points so it falls faster on one end. After that trying to figure out how to link rbd objects to a wire object.
Lyonz
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Technical Discussion » A point weight node
- Lyonz
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Technical Discussion » A point weight node
- Lyonz
- 114 posts
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This is my first try at expressions but im trying to do the weight with a point sop and have entered if( $PT < 1 WEIGHT = 5 ) why is this not working? Also looking at the attribute create and have tried to put WEIGHT as the local varible but would you put the expression in the size bar ?
Lyonz
Lyonz
Technical Discussion » A point weight node
- Lyonz
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So create a standard attribute in the geometry context before the dop data ? on the attribute do i type in density but how do you set the amount?
Lyonz
Lyonz
Technical Discussion » A point weight node
- Lyonz
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I have an animated chain (falling getting caught and falling again) but wondering how to effect the weight of the points on the chain ?
Im wanting one end to be heavier so that it falls faster.
Lyonz
Im wanting one end to be heavier so that it falls faster.
Lyonz
Houdini Indie and Apprentice » Copy Sop
- Lyonz
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pbowmar
Ah sorry. It's generating new normals that point from $TX (position of point input1) to $TX2 (position of point input2) etc. Essentially creating a new vector for the Normals from the point positions.
Cheers,
Peter B
Thanks i appreciate your explaination i think i full understand both yours and tamte's methods now.
Houdini Indie and Apprentice » Copy Sop
- Lyonz
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yea so basically the xform is inversing the normals when its lower than 1uniform scale. The expression for this $TX should be for points how is this working for the normals ? $NX is for normals.
Lyonz
Lyonz
Houdini Indie and Apprentice » Copy Sop
- Lyonz
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pbowmar
I'm obviously too late with my example then
One advantage is it lets you interactively adjust the normals in a fairly intuitive way…
I didn't know about the Polyframe, which is a cool SOP!
Cheers,
Peter B
Hi pbowmar,
Had a quick look through your method and im wondering how typing in $TX2-$TX $TY2-$TY $TZ2-$TZ worked for you ? As i found this in the help file but when i typed it in …nothing. Im wondering does it have something to do with the xform ?
Lyonz
Edited by - June 15, 2010 19:36:17
Houdini Indie and Apprentice » Copy Sop
- Lyonz
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tamte
for closed curves change style in polyframe SOP to First Edge
or just unroll SOP to unroll the the curve in u
then polyframe SOP set to Two Edges (which is smoother than First Edge)
then fuse SOP to fuse back unrolled points
Thank you tamte you have solved all the problems i had.
Houdini Indie and Apprentice » Copy Sop
- Lyonz
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This is the file im trying to sort out, i am looking at the polyframe sop at the moment but seems as it needs uvs ? I want the most basic way to do this. If you were able to correct this file i would be grateful as i work better visually and there is not an examle in the help file.
Lyonz
Lyonz
Houdini Indie and Apprentice » Copy Sop
- Lyonz
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pbowmar
The Copy SOP by default aligns the Z axis of the thing being copied to the normals of the template.
So, get your normals to face outward and Bob's your Uncle!
Cheers,
Peter B
Thanks for the reply,
I am using a basic curve that is closed and it only has 1 normal in the center, so ive added a point sop before the copy sop. I am still unable to get the point normals to go around with the flow of the geometry and have looked through the help file.
I am wondering what the expression would be as i have tried:
$TX2-$TX $TY2-$TY $TZ2-$TZ in the normal parameter and the only scale variable is PSCALE for particles.
The main idea is to create a chain with every other point been a box sphere and tube, this would create a necklace.
Lyonz
Houdini Indie and Apprentice » Copy Sop
- Lyonz
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Basic question,
How do you get the object your copying to flow all the same way ?
How do you get your objects to face away from the center of the guide geometry ?
Thanks
How do you get the object your copying to flow all the same way ?
How do you get your objects to face away from the center of the guide geometry ?
Thanks
Technical Discussion » Burst Into Flames
- Lyonz
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Houdini Indie and Apprentice » How to change the HDRI orientation of the environment map?
- Lyonz
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Hi
Rotate the environment light itself that will change the direction of the map.
I am also trying to create HDRI and was under the impression that the way to create a light probe was to take photos of a reflective ball as shown in this tutorial: http://projects.ict.usc.edu/graphics/HDRShop/ [projects.ict.usc.edu]
But from looking at the houdini help file, the sample DOSH files are created by taking 6 different directional photos and merged using the isixpack. Does one have more benefits than the other ?
Thanks
Rotate the environment light itself that will change the direction of the map.
I am also trying to create HDRI and was under the impression that the way to create a light probe was to take photos of a reflective ball as shown in this tutorial: http://projects.ict.usc.edu/graphics/HDRShop/ [projects.ict.usc.edu]
But from looking at the houdini help file, the sample DOSH files are created by taking 6 different directional photos and merged using the isixpack. Does one have more benefits than the other ?
Thanks
Houdini Lounge » Mix two or more materials
- Lyonz
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Wondering if anyone has found a way of mixing two materials ? as i am currently trying to create condensation and wanting to mix different values of glass.
Lyonz
Lyonz
Technical Discussion » Burst Into Flames
- Lyonz
- 114 posts
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DJ_BOXERLyonz
I have done this but it still seems to take ages to load ?
Lyonz: There are several things I am looking at:
1) What are your computer specs?
2) Is the File Node Active and connected when it is set to Read?
3) Are you caching out from the first frame to the last from on the playbar? With this: first try playing the sim normally then w/o closing Houdini activate the File Node and try that.
I know this is alot to take in so, hang in there?
DJ
1) Quadcore 4gb overclocked 64bit windows 7 Nvidia Q8800
2)Yes i have put the file node to read
3)Yes done that
Q1. Wondering whats the reason for making point clouds ? does this help in rendering?
Q2. Im wondering if i need to turn something off before reading the files as im thinking its loading the files but still simulating ?
Lyonz
Technical Discussion » Burst Into Flames
- Lyonz
- 114 posts
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Technical Discussion » Burst Into Flames
- Lyonz
- 114 posts
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I am currently trying to burst a guitar into flames and wondering how to load sim files correctly ?
I have put a file node at the end of the autodopnetwork and put it to write files i have now got the sim files.
Im wanting the fastest solution to load these correctly now ?
I have put a file node at the end of the autodopnetwork and put it to write files i have now got the sim files.
Im wanting the fastest solution to load these correctly now ?
Houdini Indie and Apprentice » tutorial - blowing an image away using particles
- Lyonz
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Technical Discussion » Car Paint & Textures
- Lyonz
- 114 posts
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Hello i am wondering if anyone knows how to add a texture slot for the surface shader car paint ?
Im wanting racing stripes for my car and wanting to use the paint shader for both the main and the stripes. I can't use groups with a material node as my topology is not straight its curved.
Also how do you save out this shader so that i can install it as a digital asset to use in other scene files ?
File attached of a box with non straight edge loops.
Thanks in advance
Im wanting racing stripes for my car and wanting to use the paint shader for both the main and the stripes. I can't use groups with a material node as my topology is not straight its curved.
Also how do you save out this shader so that i can install it as a digital asset to use in other scene files ?
File attached of a box with non straight edge loops.
Thanks in advance
Houdini Indie and Apprentice » tutorial - blowing an image away using particles
- Lyonz
- 114 posts
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mawiLyonz
I have followed this way of using vops and it is still not working for me could someone take a look at my hip file. the image is not showing up ?
Thanks
Your parameter vop reads UV it should be lower case uv.
Thanks it works fine now. Wondering if i have this method straight ?
1. Grid used to create particles on surface.
2. The texture node used gets inherited to the pop network for visualisation to work.
3. Vop sop used acts as some type of shader ?
4. (Vop sop) Colour map used to load in a texture but why not use some other texture node ?
5. Why does the the vop network need uv parameter instead of a uv constant to work ? as i thought the uv would always be the same and the particle system is revealing the image.
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