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  | // Recursive lightning | |
| // Raio recursivo | |
| void setup() { | |
| size(400, 400); | |
| frameRate(2); | |
| } | |
| void draw() { | |
| background(0); | |
| stroke(255); | |
| //strokeWeight(3); | |
| raio(width/2, 0, 10, 1); | |
| } | |
| void raio(float x_start, float y_start, int num, float s) { | |
| float w = 50; | |
| float y_step = 40; | |
| float r_range = 15; | |
| pushMatrix(); | |
| translate(x_start, y_start); | |
| scale(s, s); | |
| PShape ps = createShape(); | |
| ps.beginShape(); | |
| ps.noFill(); | |
| ps.vertex(0, 0); | |
| for (int i = 1; i < num; i++) { | |
| float x = w/2 + random(-r_range*2, r_range*2); | |
| float y = i*y_step + random(-r_range, r_range); | |
| if ( i % 2 == 0) x = -x; | |
| ps.vertex(x, y); | |
| } | |
| ps.endShape(); | |
| shape(ps, 0, 0); | |
| if (num>3) { // enquando for maior que 3 vértices | |
| for (int i = 1; i < ps.getVertexCount()-2; i++) { // só antes dos últimos 2 | |
| PVector v = ps.getVertex(i); | |
| raio(v.x, v.y, num-3, 0.5); // recursivo 3 vértices mais curto! | |
| } | |
| } | |
| popMatrix(); | |
| } | 
  
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