Edge Tracing and Effects

I am working on a small project regarding projecting mapping. What I would like to achieve are the effects in those videos:

I got as far as making the the geometrical objects and aligning them and also with help of some patches I found on this side I can use several projectors for one or more objects.

What I cannot figure out is how to get this tracing effect etc.

Some help would be great. Thanks in advanced.

Siliconsoul.

Hi
try out vertex buffer to get the indexes over to B-spline, then use Line for example for tracing.
cheers

IO

can you give us a patch pleaseee :-)

Hi I ll try to post something later on although it s an idea in a very early stage, anyway beware that there may be less painful ways to achieve it (writing a dedicated shader maybe?) and that 90% of the work is not the patch itself but the selection of the vertices over the time ie: a way to control it.
cheers

Here a starter idea, as mentioned before I guess there are far better ways to accomplish it, and I ll post some more stuff soon so we can try to work it out together, anyway have a look at it maybe you can come out with something better.

edgetracing-idea.v4p (11.6 kB)

A better version

Edge tracing idea II.v4p (13.2 kB)

And another “cheap” way to get the edge tracing effect.

edge_idea_III.rar (7.4 kB)

And one more, this is the most flexible one, although you ll have to create your own animation with timeliner or a MIDI sequencer, or parsing and XML file, whatever.

edgetracing-idea_IV.v4p (12.2 kB)

Hi Io

Your IV patch looks interesting. I like the way you’ve drawn the wire frame using a line.

The second line doesn’t seem to do anything though. What should be happening when I hit the toggle connected to the damper?

Cheers
w

Hi
when you hit the toggle button three purple lines should start from one vertex and be drawn on three edges…

Works now. Thanks