Processing 1.0 - Processing Discourse - Collision shape detection geomerative

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Index › Programming Questions & Help › Syntax Questions › Collision shape detection geomerative

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Collision shape detection geomerative (Read 756 times)

DA.B

Collision shape detection geomerative
Feb 14^th, 2009, 6:46pm

Hi folks,
once again a question about geomerative.
I am playing around with "contain" of geomerative. I found the tutorial detecting collision by a point to a svg shape.

What I need is to detect a collision of two svg shapes.
Does anybody has an idea what I have to change in the script?

the pde with the svgs are here:
www.sternmotor.de/svg.zip

import processing.xml.*;
import processing.opengl.*;
import geomerative.*;

RShape sh01;
RShape sh02;
boolean ignoringStyles = false;

void setup(){
size(600, 600);
smooth();
g.smooth = true;

// VERY IMPORTANT: Allways initialize the library before using it
RG.init(this);
RG.ignoreStyles(ignoringStyles);

RG.setPolygonizer(RG.ADAPTATIVE);
sh01 = RG.loadShape("txt_01.svg");
sh02 = RG.loadShape("txt_02.svg");
sh01.centerIn(g, 100, 1, 1);
sh02.centerIn(g, 100, 1, 1);
noLoop();
}

void draw(){
background(255);
stroke(0);
noFill();
sh01.translate(random(600),random(600));
sh02.translate(random(600),random(600));
sh01.draw();
sh02.draw();
/// Here is something wrong - but what???
RShape p = new RShape(sh02.children[0]);
if(sh01.children[0].contains(p)){
/////////////////
println("Hit");
}
}

Ricard

Re: Collision shape detection geomerative
Reply #1 - Feb 14^th, 2009, 9:04pm

Hi,

Well there is no "real" collision detection in Geomerative. Maybe the closest, however a bit inefficient would be to perform an intersection between two shapes and ask for the area.

Otherwise I have implemented a few methods that might be close enough to collision (contains(RShape) and intersects(RShape)). You can find them in the new Geomerative rev 20:

http://www.ricardmarxer.com/geomerative/

Your sketch would then become:

http://www.ricardmarxer.com/processing/test3-rev.zip

If you need more speed, I have also added a few methods that act only on the Handles or even on the Bounding Box of the shape passed.

Good luck,
ricard

DA.B YaBB Newbies Offline Posts: 24	Re: Collision shape detection geomerative Reply #2 - Feb 14^th, 2009, 9:38pm Works really perfect! Thank you so much for your help - that saved me a lot of work!

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