Hi,

it has nothing to do with peasycam, more with processing.

You can set the x-coordinates of your art being exactly around zero (e.g. going from -100 to +100).

When you then use rotate() and translate your art into the middle of the screen, the thing rotates around itself.

This scares me every time I do it.

Greetings, Chrisir    

1. float CameraX;
2. float CameraY;
3. float angle;
4. void setup()
5. {
6.   size( 800, 800, P3D );
7.   CameraX = width / 2.0;
8.   CameraY = 50;
9.   //  noCursor();
10. } // setup
11. void draw()
12. {
13.   background(0);
14.   // camera
15.   camera(
16.   CameraX, CameraY, 700,
17.   width/2.0, height/2.0, 0,
18.   0, 1, 0);
19.   // Floor
20.   drawFloor();
21.   // ==================================================
22.   // paint box
23.   stroke(111, 110, 110);
24.   fill(111, 110, 110); 
25.   pushMatrix();
26.   translate(width/2, 0, 0);
27.   rotateY(angle);
28.   MyBox (-100, 350, -0,
29.   100, 350, -0,
30.   15, color (2, 0, 255));
31.   popMatrix();
32.   //
33.   angle+=.01;
34. } // draw
35. void keyPressed() {
36.   if (key == CODED) {
37.     //
38.     if (keyCode == UP) {
39.       CameraY-=10;
40.       // println("UP");
41.     }
42.     else if (keyCode == DOWN) {
43.       CameraY+=10;
44.     }
45.     else if (keyCode == RIGHT) {
46.       CameraX+=10;
47.     }
48.     else if (keyCode == LEFT) {
49.       CameraX-=10;
50.     }
51.     else {
52.       // nothing
53.     }
54.   }
55.   else { 
56.     // not key == CODED
57.     //
58.   }
59. }
60. void MyBox(float x1, float y1, float z1,
61. float x2, float y2, float z2,
62. float weight, color strokeColour)
63. // was called drawLine; programmed by James Carruthers
64. // see http://processing.org/discourse/yabb2/YaBB.pl?num=1262458611/0#9
65. {
66.   PVector p1 = new PVector(x1, y1, z1);
67.   PVector p2 = new PVector(x2, y2, z2);
68.   PVector v1 = new PVector(x2-x1, y2-y1, z2-z1);
69.   float rho = sqrt(pow(v1.x, 2)+pow(v1.y, 2)+pow(v1.z, 2));
70.   float phi = acos(v1.z/rho);
71.   float the = atan2(v1.y, v1.x);
72.   v1.mult(0.5);
73.   pushMatrix();
74.   translate(x1, y1, z1);
75.   translate(v1.x, v1.y, v1.z);
76.   rotateZ(the);
77.   rotateY(phi);
78.   noStroke();
79.   fill(strokeColour);
80.   box(weight, weight, p1.dist(p2)*1.2);
81.   popMatrix();
82. }
83. void drawFloor() {
84.   stroke(255);
85.   // draw floor:
86.   float floorY=600;
87.   // to right (background)
88.   line ( 20, floorY, -200,
89.   width-20, floorY, -200);
90.   // to right (in the front)
91.   line ( 20, floorY, -0,
92.   width-20, floorY, -0);
93.   // left side
94.   line ( 20, floorY, -200,
95.   20, floorY, -0);
96.   // right side  
97.   line ( width-20, floorY, -200,
98.   width-20, floorY, -0);
99. }
100. //