Camera Mapping or cammap

sama.van

Hello,

I did some research on the forum but I didn't find any pages on the camera mapping...

On google on found that : http://www.3dfluff.com/cameramapping/cameramappingtut.htm

But it's especialy for Cinema 4D... Basically Maya could probably to the same, but I'm looking for a tutorial made on Maya and maybe there are some tools for that...


Does someone know something about it?

I know the transfert tools on Maya it work nice, but is there an option for working with the current camera angle?

pior

http://www.thegnomonworkshop.com/store/search_results.php

http://www.digitalartform.com/archives/2004/11/camera_projecti_1.html

Looks like a lot of fun!

kodde

I've tried that second one that pior linked to. It's loads of fun.

renderhjs

maya has a advanced camera mapping system in which you can stitch multiple cameras together (propoably some blend angle/distance) but I dont know how since I dont use maya.

3dsMax (my home) has a useable blendable multi- cam camera mapping since version 7 I believe (it uses a special material for that to blend the camera mapping types). But you can also apply world state modifiers or local modifiers on meshes and have the UV projected like the camera in realtime.

A lot of the Ghibli movies are done using XSI and its camera mapping stuff - but I have also seen those things done in Houdini (Steamboy I believe was such a movie done with Houdini partly).

So all major applications have the basics for it - for a movie production quality nuke or something similar though might be a better pick.

some links of stuff I know that are related to camera mapping:

Tekkon Kinkreet (studio 9°c)

http://www.softimage.jp/user_case/tekkon/gallery/img09.html


howls moving castle:


but maybe for the best place check out the official help file that comes with maya I am sure it should be explained there somewhere.

The snippet I could find on the net regarding maya and camera mapping:
http://pesona.mmu.edu.my/~juhanita/mapping/texturingPolygon.htm

reating UVs based on the camera view
...
1 You must first select the faces on which you want to create UVs. Press F11 or press the right mouse button and select Face from the marking menu.

2 Click to select the faces you need.

3 Select Edit Polygons > Texture > Create UVs Based on Camera. Maya creates UVs and maps the texture to the faces you selected.

4 If necessary, use a mapping technique, such as Planar Mapping, to fit the texture after it has been placed.

so appearently if you do it via the UV's and not a shader it can be done in the UV editor or so

kodde

In Maya you do it via a Projection-node that is connected between the File node (texture) and Shader node. You set the Projection to "perspective", it's in "planar" by default. Then you are able to set the which camera to use, still in the projection node. Can't remember what it's called. It's all quite simple really. All explained in the second link pior posted.

sama.van

haha really thank you guys!! great!!!!! I will show you some preview whem we will start the project ! ^_^...

I'm gonna do some mel script now... haha

arrangemonk

camera mapping is also neat for ingame graphics
(render should be interested in this since hes doing flash games)
its a bit offtopic, but rendering out a skybox of the environment you're working on and render out a second pass for the alpha thingy should do the job,
then you can move your caracter with the camera pointed at him only with 12 polys for the view

renderhjs

arrangemonk wrote: »

(render should be interested in this since hes doing flash games)

oh I did lots with camera mapping ,- actually been a favorite topic for me many times (not just engines, but also image modeling, extracting textures, rendering, FX, compositing,and many more).
I used the max camera mapping modifers in combination with my first as3 3d game engine to project environment renderings on realtime depth clipping meshes similar to games like the first Resident Evil ones.
The thread of that engine/ project is:
http://boards.polycount.net/showthread.php?p=806838
some of it is explained here:
http://www.renderhjs.net/bbs/polycount/colorcatch/depth_tricks_1.jpg
and here is a simplified online engine demo that shows how it works:
http://www.renderhjs.net/bbs/flashkit/color_dune/demo_11/

arrangemonk

sorry, i meant spherical environemnts

pior

Alright! Just dug into this just for fun. It is extremely easy in 3DSMax using the camera map modifier assigned to objects. Then it is just a matter of assigning the photograph and additional patches here and there.

It is also possible with a camara map material but I found it buggy and unresponsive...

It is very satsifying to rotate around a photograph! And painting the patches is a real pleasure since it is all fullbright stuff. And then a quick mental ray AO pass overlaid on top to tie things together. Easy! Used the source material from the Maya tut posted above.


http://vimeo.com/5352241

Cant wait to use this on full scenes ... and characters!!!

kodde

Yeah, it's loads of fun. I tried camera mapping myself dancing around once

Here's my box:
[ame]http://www.youtube.com/watch?v=vD-eXe8p2gg[/ame]


This one did not turn out the way I wanted, but it shows a bit of my setup at the end of the clip.
[ame]http://www.youtube.com/watch?v=bU7pIhvHNvQ[/ame]