Processing Forum

ToxicLibs Line Mesh Intersection

[1 Reply]
- 29-Oct-2012 02:55 AM
- Forum: Contributed Library Questions
Hello,

I'm trying to get intersection of the line with any mesh geometry (in this case simple plane) and to draw a box at the intersecting point (in library examples there is one called RayReflectSphere that does similar things – but it works for sphere only).

Here is the script I've got so far… but it seems there is something wrong here

Thanks in advance for help
1. import processing.core.PApplet;
  import toxi.geom.AABB;
  import toxi.geom.Intersector3D;
  import toxi.geom.IsectData3D;
  import toxi.geom.Plane;
  import toxi.geom.Ray3D;
  import toxi.geom.Ray3DIntersector;
  import toxi.geom.ReadonlyVec3D;
  import toxi.geom.TriangleIntersector;
  import toxi.geom.Vec3D;
  import toxi.processing.ToxiclibsSupport;
  
  public class Main extends PApplet
  {
  Vec3D pos = new Vec3D (0,200,200);
  Vec3D target = new Vec3D (0,-50,0);
  Vec3D dir = target.sub(pos).normalize();
  
  ToxiclibsSupport gfx;
  Vec3D camRot = new Vec3D();
  Plane p;
  Ray3D ray;
  Ray3DIntersector isec;
  
  public void setup()
  {
  size(600,600,OPENGL);
  gfx = new ToxiclibsSupport (this);
  p = new Plane();
  }
  
  public void draw()
  {
  background(120);
  translate(width/2, height/2, 0);
  
  camRot.interpolateToSelf(new Vec3D(mouseY*0.01f,mouseX*0.01f,0),(float) 0.05);
  
  rotateX(camRot.x);
  rotateY(camRot.y);
  
  ray = new Ray3D(pos,dir);
  isec = new Ray3DIntersector(ray);
  IsectData3D info = isec.getIntersectionData();
  ReadonlyVec3D isectPos=info.pos;
  
  stroke(0);
  gfx.plane(p, 200);
  stroke(0,255,0);
  gfx.line(pos, target);
  
  gfx.box(new AABB(isectPos,5));
  }
  
  }

Very Simple 3d with toxiclibs

[2 Replies]
- 10-Aug-2012 03:25 AM
- Forum: Contributed Library Questions
hello,

I'm trying to make very first steps in 3d...I would greatly appreciate if somebody could show how to create, for example, a cube and extrude one face with some distance using toxiclibs.

thanks in advance.

ControlP5 ColorPicker to control RGB values

[3 Replies]
- 09-Jul-2012 09:51 AM
- Forum: Contributed Library Questions
Hello,

I've got a very basic question about ColorPicker in ControlP5.

I am inspired by Ira Greenberg's RadialGradient sketch, and want to draw circles with controlled transition of color from outer RGB values to inner. Somehow I couldn't manage sliders to update color values...

Can somebody explain, what should be changed here in order to see circles color based on sliders?

Thanks in advance for help
1. import controlP5.*;
  
  ControlP5 cp5;
  ColorPicker cp;
  ColorPicker cp2;
  int rad = 200;
  
  //____________________________ outer RGB fill variables
  float r1;
  float g1;
  float b1 ;
  // ____________________________inner RGB fill variables
  float r2;
  float g2;
  float b2;
  // ____________________________decrement RGB
  float r3 = (r2-r1)/rad;
  float g3 = (g2-g1)/rad;
  float b3 = (b2-b1)/rad;
  
  void setup()
  {
  size (600, 600);
  smooth();
  background(150);
  noStroke();
  ellipseMode(RADIUS);
  
  //____________________________ RGB sliders
  cp5 = new ControlP5(this);
  cp = cp5.addColorPicker("RGB_outer")
  .setPosition (60, 10)
  .setColorValue(color(r1, g1, b1, 255))
  ;
  cp2 = cp5.addColorPicker("RGB_inner")
  .setPosition (60, 90)
  .setColorValue(color( r2, g2, b2, 255))
  ;
  }
  void draw()
  {
  drawGradient(300, 300);
  }
  
  // ____________________________ function to draw circles + fill
  void drawGradient(float x, float y)
  {
  for (int r = rad; r!=0; r--)
  {
  fill (r1, g1, b1);
  ellipse (x, y, r, r);
  r1 +=r3;
  g1 +=g3;
  b1 +=b3;
  }
  }

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