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Found 8 results

  1. Hi guys, how can I edit the pivot to match a specific surface primitive or normal? I need to transform the arm of my robot in a specific way, so my pivot needs to be edited to match the surface normal. I already tried to edit it with " and ' but this only allows to move it but not to rotate it :/ Roboter.hiplc
  2. L-System Pivot

    Hello, Does anyone know a way to get the pivot point of each prim from an L-System? I'd like to use this for animating bends and rotations but I'm not sure how I would go about it. Logically I need to find the nearest point on the previous gen to the 0 point of each primitive but it must also take into account the transforms of the previous gens too. I looked in to matt estela's rotation matrices but this doesn't account for the previous gen's transforms. Any help greatly appreciated. http://www.tokeru.com/cgwiki/index.php?title=HoudiniVex#Rotate_prims_around_an_edge.2C_alternate_version
  3. Hey, a simple question here: how can I move an object to the pivot or a pivot to the center of an object; or an object to the center of the world? Got a case where the ship as well as the pivot are off. I need them both at the same place on object level.
  4. How does the pivot work when using the make transform Vop node? I am trying break down and figure out the function of the Make Transform node using python (Outside of any 3d software). The Translate is pretty basic as I can just place them into a matrix as they are x = m[3][0], y = m[3][1] and z = m[3][2]. For rotation I am using the following: def EulerToMatrix(Rotation): x, y, z = Rotation XM = M3([[ 1, 0, 0], [0, math.cos(x), -math.sin(x)], [0, math.sin(x), math.cos(x)]]) YM = M3([[math.cos(y), 0, math.sin(y)], [0, 1, 0], [-math.sin(y), 0, math.cos(y)]]) ZM = M3([[math.cos(z), -math.sin(z), 0], [math.sin(z), math.cos(z), 0], [0, 0, 1]]) return (ZM * YM * XM) I can then just pipe this information into the Matrix4. The problem I have now is that I cannot find any information that I can understand on how to apply the pivot to the matrix4. It's not as simple as just adding. I have attached a file that has the make transform that I am using to test against. The pivot seems to be linked to the rotation and so I am guessing it is related to the scale as well. Is there any way to break down how this pivot transforming works? MakeTransPiv.hip
  5. Hi I am trying to rotate a volume so it aligns with the original geometry. (align along x axis - convert to volume - revert back to original place) I tried setting the primintrinsic, but the pivot point is shifted relative to the original geometry, there is a way to specify the desired pivot for the matrix? Any ideas? Thanks) volume_rotate_v01.hip
  6. Xform pivot

    Hi, I'm trying to learn, but I sometimes find it hard to get answers from the doc (real good doc tho). here is what I'm struggling with at the moment: I want the pivot of a transform node to to be placed relatively to another object (in the same geo node). I need the pivot to be at XMIN in x axis, 0 in y axis, ZMIN in z axis. Easy. But I need the XMIN and ZMIN of another object. Can someone help me with the syntax ? thanks !
  7. Hi people... I got some serious vdb issues, where i got some vdb combining, tweaking,,,combining with other poly to vdb , etc. I have some xfroms on the geom before it gets converted to vdb and combined. It goes well for a while, i make keyframes on the xforms...and at some point on the vdb combine, the xforms stuff up and move out of position. It seems not to like xfroms up the chain, pre vdb conversion. I do get some odd warnings on some of the VDB combine, i was getting is a 'mismatch surface & surface value mismatch (0.025 & 0.075)' when both A&B vdbs are 0.025, (but gets fixed with a re sample before going in to the vdb combine on both A& B I also get a warning on 'surface & surface transforms don't match' on the vdb combine that stuffs up my transforms. Pain! I would try to do all my geo transforms then save an alembic and load back without extra xforms, but i do need to line this up to the millimeter, and I can't due to things going off ..... I am runnning 14.0.395 thanks in advance !
  8. hey guys i can't Center Pivot ( Rotation Angular velocity ) !!! could u help me Center Pivot_ Dop Network.hip
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