Hi,


I'm a Processing beginner.

I'm trying to draw some neurones.

These neurones will have a shape created with bezier curves. I'd like to curve the neurone at the middle of two branches. But before, I have to find the mid points.

I have a problem finding the mid points. The result's not good although I already have the angle and the distance between the two points.

If anyone can help me, it would be fine: here is the code for the moment:

1. void dessinerNeurone(int x, int y, float[] extremitesX, float[] extremitesY) {
2.   float shrink = random(0, 0.2);
3.   pushMatrix();
4.   translate(x, y);
5.   strokeWeight(10);
6.   stroke(255);
7.   point(0, 0); // center point
8.   for (int i = 0; i < extremitesX.length - 1; i++) {
9.     println(i);
10.     float xStart = extremitesX[i];
11.     float yStart = extremitesY[i];
12.     float xStop = extremitesX[i+1];
13.     float yStop = extremitesY[i+1];
14.     float a = atan2(xStop - xStart, yStop - yStart); //println(degrees(a));
15.     float d = dist(xStart, yStart, xStop, yStop); //println(d);
16.     pushMatrix();
17.     translate(xStart, yStart);
18.     stroke(0, 255, 0);
19.     strokeWeight(5);
20.     fill(255);
21.     text(str(i), 0, 0); //startPoint
22.     point(0, 0);
23.     stroke(255, 0, 0);
24.     fill(255);
25.     text(str(i), (d/2*cos(a))/2, (d/2*sin(a))/2);
26.     point((d/2*cos(a))/2, (d/2*sin(a))/2); // middle point
27.     popMatrix();
28.   }
29.   popMatrix();
30. }
31. void setup() {
32.   colorMode(RGB, 255);
33.   size(500, 500);
34.   background(0);
35.   smooth();
36.   fill(0);
37.   int step = 200;
38.   for (int y = 0; y <= height; y += step) {
39.     for (int x = 0; x <= width; x += step) {
40.       float w = random(20, 30); //w = 30f;
41.       int n = (int) random(3, 8); //n = 6;
42.       float ang = 0;
43.       float[] extremitesX = new float[0];
44.       float[] extremitesY = new float[0];
45.       for (int i = 0; i < n ; i++) {
46.         float stepInc = 2*PI/n;
47.         float inc = stepInc;
48.         //float inc = random(stepInc - degrees(30), stepInc);
49.         strokeWeight(3);
50.         point(cos(ang)*w, sin(ang)*w);
51.         extremitesX = append(extremitesX, cos(ang)*w);
52.         extremitesY = append(extremitesY, sin(ang)*w);
53.         ang += inc;
54.       }
55.       dessinerNeurone(x, y, extremitesX, extremitesY);
56.     }
57.   }
58. }

Thanks!