light section system
 

hi guys!

I need your help, i try to make al laser triangle with a "point light" to display a laserline on an object. but i cannot change the geometrie of the point light it is always a cone.... :headbang:

i hope you understand what i mean, i will try to make a picture of my problem when iam at home....


THX...

... this is a serious problem because i need this for work to make a small demonstration of a problem....

hope you can help me!!!!

i found an image

Hi!

2nd Problem.... when is create a new spot light the light goes through the object which is placed in front of it...

i used a standard spot light with

intensity 4.132
cone angle 4.00

light Fog: lightfog1
fog spread: 2.232
fog intensity: 1.818

Under the lightshape attributes check the depth shadows box I think, and alter the number to suit, that should sort it out!

thx!! - you're right i forgot the shadows...

added ray trace shadows

rendered with mental ray
now it works


but there is still the problem, that i need a "triangle shaped light area".
It should represent a spot laser with a cylinder lense which forms a trinangle....

The whole system is a light section system (laser and camera) for measurements (like in the picture attached in my 2nd post)

i hope someone can help me solve this problem.... is it possible to change the shape of the spot light???

lg vietcong

in photoshop make triangle (white on black) and map file to the lights color

hmmm... sounds interesting - i will try this...

meanwhile i solved my problem like this:

(1) polygon cube --> forming a trinagle
(2) cutting out the "light" behind the object
(3) reverse normals
(4) deleting the "bottom side face"
(5) now i have a line on the objekt which represents my laser line


mfg

hey!

tried to change the topic name.... hmm :confused: ... whatever...

i have new progress, i finished the laser-module...

its simple 3d geometry

create a parabola and revolve it. place a spot light at the focal point pointing at the parabolic surface. make the parabolic surface 100% reflective

I think i might go try that now...

wait, I can't get it to work unless someone can tell me how to reflect light off a surface onto another surface

reflections? or actual light, as you would illuminate something with a mirror

the actual light thing

you need to read up on reflective caustics with Mental Ray... do a google search on this:

caustics Maya mental ray reflection

thx for all your help and ideas!!!


there is an update... i started the camera (Basler A600)


i will try the laser light thing when i finished modelling...

update :attn:

did u use a bump for those elivated grip type things or u use som sort of a poly tool? extrude face or what?

hi jhubbard!

no bumpmap... its all made of polygons. I used the extrude face tool for the grip


here a vector render:

hmm how do u do that dont it take ages making a grid so u can extrude em all after

i guess so yeah, but thats what u have to do, spend time on ure models, if u want them to look the business.
How easy do u want it ;) hehe

@jhubbard

like magicsy said... you have to spend time on your models...


but the grip wasn't too time consuming... the grid is no problem the only boring thing is selecting the faces...

i made it like this:

(1) create a polygon cylinder with a lot subdivisions around the axis (my grip has 120)

(2) with the "split edge ring tool" make enough edges at the right position

(3) select the faces and press extrude face


you can also create your cylinder with enough subdivisions along height and move them afterwards to the right position, but i like the split edge ring tool ;)

thats it!

ive never heard of this split edge ring tool, and cant find it, i have a feeling im making modelling certian objects a lot more of a long winded way (split poly tool). Can u enlighten me?

yup i can u need MJ poly tools basically one of the things it does is creates loops. But maya 7 has this intergrated. anyways.

ah k im not on 7 so tat would be why, thanks anyways, i might have a look if thats a plugin but for now i think ill just set the number of loops in the channel box, means i have to do a bit more planning but no harm done there.

yes, its a maya 7 feature...

you can do it also like this:

start with a cylinder, delete the unnecessary edges and extrude the "top face" as often as you need it to get enough edges along the height of the cylinder...

mfg

yer i think ill stick to the chanel box =-) that reminds me is there any way when yer extruding more than one face for em not to creats faces inbetween em aswell,
e.g. I i have a cube ad split the top face into two and extrude them both, it doesnt only pull them out it creates extra faces along the side were they join . Can this be avioded?
thanks

sure is..
Polygons/tool options
TIck keep faces together. ;)

yer i thought it wos that n ive tried it many times but every time it seperates them again

hmm strange that would be annoying. maybe a pro might know.

normally "keep faces together" should work...


here's a wire:

first mounting idea:

very nice detailed model!

thx magicsy...

small update - but i have to redo the whole thing - because i get a new kamera... :headbang: