Hi.
i was making some experiments with boids and with flow fields using perlin noise.
i came up with this one.
i’m really happy with the results 
That is truly beautiful. Plus so many people post examples without the source code. You cant learn that way. I think the learning process is a better share than just a “WOW thats cool” expression.
ding
hi, i forgot to add that in that source i use a function to draw circles in 3d space, it wont compile without it.
the function is a very simple adaptation of the original one and code is as follows
//this function is pretty much a copy of the other one
//i just added the "z" variable in the constructor...
void ofCircle(float x, float y, float z, float radius){
if (!bSetupCircle) setupCircle();
// use smoothness, if requested:
if (bSmoothHinted && drawMode == OF_OUTLINE) startSmoothing();
// draw:
glPushMatrix();
//and changed this line here to translate also in the Z plane (and thats it):
glTranslatef(x, y, z);
glScalef(radius, radius, 1);
glBegin( (drawMode == OF_FILLED) ? GL_POLYGON : GL_LINE_LOOP);
glCallList(precachedCircle);
glEnd();
glPopMatrix();
// back to normal, if smoothness is on
if (bSmoothHinted && drawMode == OF_OUTLINE) endSmoothing();
}
it goes in the ofGraphics.cpp file, and the constructor must go on the ofGraphics.h file, and thats it
AAHHHH … with more time on my hands these days, I was hoping to start playing with OF again so I took a look at the example section and noticed all the wonderful samples from Pelintra. Boids, noise fields… exactly the stuff that I am trying to tackle and learn… I was so excited until I noticed all the source links were dead!!! 
Anyone, including Pelintra, might be gracious enough to provide those files again?
The original links were these:
http://www.rui-m.com/OF/bloodrush/src.zip
http://www.rui-m.com/OF/slugs/src.zip
http://www.rui-m.com/OF/soundvisualstest1src/src.zip
http://www.rui-m.com/OF/bolas/src.zip
http://www.rui-m.com/OF/marchingcubes/src.zip
http://www.rui-m.com/OF/criaturas/src.zip
Hope someone can help!
Thanks so much
M.
I just wrote my own boiding class based upon this pseudocode:
http://www.vergenet.net/~conrad/boids/pseudocode.html
testvideo at vimeo:
http://vimeo.com/1606202
I also added a simple HDR realtime blooming effect using GLSL.
1 Like
Hey Moka… your stuff is very cool indeed! You are definitely more proficient than me! so for me looking at some good code samples is truly a quick way to get a grasp of things, especially since I have to spend so much time doing other stuff not related to programming =( That’s why these forums and you all are a blessing man! Anyhow, I trying to hack away as much as I can =)
hum…
I’m noob so… I wanted to look how things work…
but i cannot download the code…
I associate with mohei, can some one give some updated link? tnx
hi.
sorry for the dead links. i had some problems with my server (i think it was my fault) and had to have my account restarted. and this happened while i was out on vacation, thats why the sources are not online yet. i’ll upload them either today or tomorrow.
sorry
*edit* they’re online, everything should work now (i think)
It works! Great ( not tryed the code now… just donwloaded ), TNX A LOT
@ Moka,
I’ve been looking at the same pseudocode for writing flocking behaviour, which I would like to experiment with for a new project I’m working on (see this post for info/background on the upcoming project http://forum.openframeworks.cc/t/ofxosc-v0.3-now-available/970/3).(Especially like how the boiding code is setup - allowing for extra rules to be added; like stuff for predators and attractors…)
Since I’m having serious (programming newbie :? ) trouble converting the ideas into compilable of-code, I was wondering if you are willing to share some insight into your boiding class.
cheers,
-tim
Thanks Pelintra. You guys are awesome! =)
hi pelintra,
looks like the link to the source is dead again…
any chance of bring it back to life?
Hi.
i had some problems with my host which led to having my stuff down for over a week!
but its now up again so the link should work.
but anyway, i also created a google code to store all my sources you can check it here:
code.google.com/p/ruisource
cool thanks for that!
its very impressive work btw…
hi pelintra, in your code creatures, you have a call name opengl/opengl.h, were can i find this library i change for gl/gl.h and dosn´t work.
thx for sharing your code…
Hi JohnaVilla2,
you shouldn’t have to include opengl in your code, i only did that because that code is old and i didn’t know what i was doing
delete that line and use #include “ofMain.h” instead, it has the opengl includes that you need.
Rui
thx all works ok, very nice code :S
you are awesome men
Just wanted to notice you that after adding your circle function I got an error with:
glCallList(precachedCircle);
It seems the implementation of circle in 006 is different from when you did your function.
I commented the line out, and it runs but I don’t get any circle rendered
Oh Indeed after some tweaking between your code and the next implementation I tried this:
void ofCircle(float x,float y, float z, float radius){
if (!bSetupCircle) setupCircle();
// use smoothness, if requested:
if (bSmoothHinted && drawMode == OF_OUTLINE) startSmoothing();
glPushMatrix();
glTranslatef(x, y, z);
int k = 0;
for(int i = 0; i < numCirclePts; i++){
circlePtsScaled[k] = x + circlePts[k] * radius;
circlePtsScaled[k+1] = y + circlePts[k+1] * radius;
k+=2;
}
glEnableClientState(GL_VERTEX_ARRAY);
glVertexPointer(2, GL_FLOAT, 0, &circlePtsScaled[0]);
glDrawArrays( (drawMode == OF_FILLED) ? GL_TRIANGLE_FAN : GL_LINE_LOOP, 0, numCirclePts);
glPopMatrix();
// back to normal, if smoothness is on
if (bSmoothHinted && drawMode == OF_OUTLINE) endSmoothing();
}
and it seems to do the trick (may be haha)
I am not sure, because the circle does not appear near the ribbon…
Anyway thanks again for you great code
I still must find some time to read it and start using oF !
you can get weirder shape with some:
void ofCircle(float x,float y, float z, float radius){
if (!bSetupCircle) setupCircle();
// use smoothness, if requested:
if (bSmoothHinted && drawMode == OF_OUTLINE) startSmoothing();
glPushMatrix();
glTranslatef(x, y, z);
int k = 0;
for(int i = 0; i < numCirclePts; i++){
circlePtsScaled[k] = x + circlePts[k] * radius;
circlePtsScaled[k+1] = y + circlePts[k+1] * radius;
[/code]
circlePtsScaled[k+2] = y + circlePts[k+2] * radius;
k+=3;
}
glEnableClientState(GL_VERTEX_ARRAY);
glVertexPointer(3, GL_FLOAT, 0, &circlePtsScaled[0]);
glDrawArrays( (drawMode == OF_FILLED) ? GL_TRIANGLE_FAN : GL_LINE_LOOP, 0, numCirclePts);
glPopMatrix();
// back to normal, if smoothness is on
if (bSmoothHinted && drawMode == OF_OUTLINE) endSmoothing();
}
and so on