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Point Cloud Question

 
n°542
thetatorme​nt
Posted on 02-22-2004 at 06:53:45 PM  profilanswer
 

okay, so i'm trying to figure out the generate point cloud mesh method. it seems that i can only get IM to generate a mesh after i've selected the points to use in the scene browser. and only the locators i selected. this sucks because i can't find a way to select all of these markers (the original ones used for calibration and the ones i added after calibration-in the modeling folder in the scene browser. is there a way to generate one big detailed mesh using both the calibration locators and also all the ones i created under the modeling tab? PLEEEASE someone help me. and fast! i'm getting very  very frustrated! it took me almost eight hours of creating a very detailed point cloud, and then when i'd do the create> create mesh tool it did nothing. finally i figured out it would wrap a mesh after selecting the points in the browser. but WHY CAN'T I SHIFT SELECT BOTH CALIBRATION AND MODELING POINTS AT ONCE??? any input would be greatly appreciated. thanks in advance. i will be forever grateful!!!cheers!

n°543
stef
Posted on 02-23-2004 at 08:26:56 AM  profilanswer
 

Hello,
 
  You can select them in the 3DView all together.
 
To be sure not selecting cameras or other 3d objects already created:
- hide cameras (unselect camera display in the display property)
- hide 3dobjects (unselect object display in the display property)
Be sure you are in Object selection mode (not face, not edge, not vertex) and select your locators in the 3dview.
 
If you unselected the display of the objects, select it back to see the resulting mesh.
 
Best,
 
Stef

n°544
cadcoke4
Posted on 02-23-2004 at 02:15:45 PM  profilanswer
 

I experimented a bit with the process.  I wish there were more in the tutorial or manual about it.  I imagine there is a logic to try to follow so that the program knows which dots to connect in what order.  In my own test I used a very orderly grid which I printed on paper. Then to make it a little more of a challenge, I curved the paper a bit.
 
  The resulting mesh was orderly.  The only thing it did which I didn't expect was to wrap around the backside of the paper.  Apparently the feature always makes a closed mesh.
 
  Please upload some pictures of your project.
 
Joe Dunfee

n°549
thetatorme​nt
Posted on 02-26-2004 at 09:02:19 PM  profilanswer
 

thanks for your help. now i can marque select the points i want. but only selects the ones in that  viewport. when using automatching mode, it often gets confused and puts the corresponding makers at way wrong places. how can you move those automatched markers??? it seems i can only move the orignal one, and not those ones it automatically put into the other photos. and even if automatch is uncheck, iIM starts to assume and puts corresponding markers in other angles in wrong places. VERY FRUSTRATING and IMHO clunky and unprofessional. also, is there a .pdf manual avail. anywhere? the help files for point cloud mesh is pathetic. any input wh0uld of course be grately apprecialted.

n°550
stef
Posted on 02-27-2004 at 05:19:06 PM  profilanswer
 

Hello,
 
About moving markers:
You can move only the "markers" (the 2D points drawn as crosses) and not the "locators" (the 3d projected points drwn as round point). The locators are re-calculated each time you place markers ...
 
If automatching fails, you could also undo the last creation and re-create by hand (So you do not change of tools). Moving the badly placed markers can sometimes be a longuer process...
 
 
Hope it helps,
 
Stef

n°551
thetatorme​nt
Posted on 02-28-2004 at 10:53:22 AM  profilanswer
 

i'm about to give up on IM and just use it for things that just need basic shapes. can anyone tell me what the difference between the markers i place which are called "markers" in scene browser... and the "helpers" listed in the scene browser when i look at the mask example that came w/ IM?? they seem to be the same to me but why are they names different? it's a shame really. i went through alot of trouble placing many tracking dots on the features of the puppet head i was trying to make a simple model of, and was very exacting w/ my shots (12 total). a grid backdrop was used as well as 4 different colored overhead locator poles. all of my shots as well as my 15 calibration markers and constraints  are green in the browser, and the 30 model markers are green also, but the mesh still generates all crazy. i'm just ready to move onto maya. for the time involved IM and the result acheived it isn't really ideal for deadline oriented production work. unless i'm missing something. but it doesn't seem there is much more to this app.

n°577
Andrewhere
Posted on 04-12-2004 at 09:41:26 AM  profilanswer
 

I thoughly concur with your experience.  The hype and the web site suggest something a little different to what I am experiencing with similar issues calibration and modelling - Talk about clunky.  Iam convinced that somewhere there is a knowledge base or a user group who can expand on what I have found to be a narrow reference environment.  I too must surely be missing something.


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