CGTalk getting a local x,y,z coord of a vertex
 05-22-2003, 05:17 PM #1 ktpr Frequenter   Join Date: May 2003 Posts: 183 getting a local x,y,z coord of a vertex I have two vertices. Is there a way to get the local (or global I guess) coordinates of these two vertices? thanks for your time cheers ktpr share quote
 05-22-2003, 06:40 PM #2 TiKiMoN Bully of Jesters   Dave Stone Developer Nuvox Greenville, USA   Join Date: Feb 2002 Posts: 74 Turn on "Echo All Commands" in the Script Editor, and then select the vertices you want coordinates for. It will show you which vertices they are, and I am sure that from there, you can get their x, y and z coordinates. __________________ :=TiKiMoN share quote
 05-22-2003, 06:44 PM #3 larryvm moving around the world   portfolio fernando vizoso TD el ranchito Madrid, Spain   Join Date: Nov 2002 Posts: 129 you can get the local position of one vertex in the mesh node of the poly the local position is vrts[numvertex]+pnts[numvertex] vrts is the original local position and pnts is the tweak of this vertex example the position in x of the vertex 293 is pSphere1.vrtx[293]+pSphere1.pntx[293] __________________ larry@larryvizoso3d.com share quote
 05-22-2003, 07:28 PM #4 ktpr Frequenter   Join Date: May 2003 Posts: 183 if I understand this correctly you basically move a vertex by 0 and it returns the result, which you capture and use? cheers ktpr share quote
 05-22-2003, 09:08 PM #5 ktpr Frequenter   Join Date: May 2003 Posts: 183 # construct ??? thank you for the replies. they have helped. In the node reference, for subdiv surfaces, it says there is a node called "vertex", which is a compound type.(file://C:\Program%20Files\AliasWavefront\Maya4.5\docs\en_ US\html\Nodes\subdiv.html). It also says that the array can be accessed using the # construct but gives no example of how to use it. My attempt to get the info gets nothing. given subdivSphere1: float \$z[] = `getAttr subdivSphere1.vertex` print (\$z[0]); // " " <- no value I am trying to get the vector coords of a subd point in space, which I can already do with poly vertices. thank you for your time cheers ktpr share quote
 05-22-2003, 09:15 PM #6 alexx Yes, I Listen...   Technical Director / 3D Artist   Join Date: Feb 2002 Posts: 2,202 i strongly recommend using the command xform , which has switches to query world space coordinates from anything.. cheers alexx share quote
 05-22-2003, 09:20 PM #7 TiKiMoN Bully of Jesters   Dave Stone Developer Nuvox Greenville, USA   Join Date: Feb 2002 Posts: 74 can you even select "points" on a subdivision surface? since they are evaluated through polygonal proxies, you can't actually select a "point" on the surface unless the detail level is extremely high, I would imagine. am I way off on this...? __________________ :=TiKiMoN share quote
 05-22-2003, 09:38 PM #8 TiKiMoN Bully of Jesters   Dave Stone Developer Nuvox Greenville, USA   Join Date: Feb 2002 Posts: 74 For any points, use pointPosition -w/-l (point)... the result is an array of 3 float values [float float float]. for example: I have a polygon sphere called pSphere1. world coordinates : pointPosition -w pSphere1.vtx[0]; local coordinates : pointPosition -l pSphere1.vtx[0]; Still not sure how well that will work for subd surfaces though. __________________ :=TiKiMoN Last edited by TiKiMoN : 05-22-2003 at 09:41 PM. share quote
 05-22-2003, 09:38 PM #9 ktpr Frequenter   Join Date: May 2003 Posts: 183 alex: thanks. Xform doesn't seem to work on vertices though. Select a sud vert and run "xform -q -r -os -m;" the values are the same for everything. --- tikimon: (man I feel like i'm working in the dark because no one knows much about subd. The documentation is hooorrrrible) Given a subd sphere named "subdivSphere1": setAttr "subdivSphere1.displayLevel" 1; // where 1 should be desired level pickWalk -d down; querySubdiv -a 4; // selects faces. string \$vertex_list[] = `subdListComponentConversion -ff -tv`; // print string for vertices All this being said, does anyone understand what the # means in the flag help documentation (file://C:\Program%20Files\AliasWavefront\Maya4.5\docs\en_ US\html\Nodes\flagHelp.html). I just need that damned coord of a subd vertex again thanks ktpr share quote
 05-22-2003, 09:42 PM #10 alexx Yes, I Listen...   Technical Director / 3D Artist   Join Date: Feb 2002 Posts: 2,202 not -os.. that is object space i think (no maya here) ther is a -ws or something for world space.. i am about 102% sure.. roughly.. i counted twice cheers alexx share quote
 05-22-2003, 09:43 PM #11 ktpr Frequenter   Join Date: May 2003 Posts: 183 OMFG tikimon, you are my hero pointPosition -l subdivSphere1.smp[256][67108867]; works like charm now I can finish my poly uv transfer to subd script. Screw that weird # construct. ahhhh [edit - actually thanks goes to everyone who replied to this thread ] cheers ktpr share quote
 05-22-2003, 09:46 PM #12 TiKiMoN Bully of Jesters   Dave Stone Developer Nuvox Greenville, USA   Join Date: Feb 2002 Posts: 74 sweeeeeeeeeeeet. in an effort to make myself look less intelligent than it appeared before, I just browsed through the MEL documentation until I found that command. anyway, glad it works! __________________ :=TiKiMoN share quote
 01-15-2006, 06:00 AM #13 CGTalk Moderation Lord of the posts   Join Date: Sep 2003 Posts: 1,066,481 Thread automatically closed This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum. __________________ CGTalk Policy/Legalities Note that as CGTalk Members, you agree to the terms and conditions of using this website. share quote