Descubre la Programación : Muestra

// Raymarching, tecnica de renderizado en 3D, similar a la
// usada en raytracing.
//
// El codigo dibuja 6 esferas en un entorno 3D, puedes girar
// la camara con WASD.

void main() {
  animate(draw, 10);
}

double ballsx[] = {1,-1, 0, 0, 0, 0};
double ballsy[] = {0, 0, 1,-1, 0, 0};
double ballsz[] = {0, 0, 0, 0, 1,-1};

double min(double a, double b) {
  return a<b?a:b;
}

double dist(double x1, double y1, double z1, double x2, double y2, double z2) {
  double dx = x1-x2;
  double dy = y1-y2;
  double dz = z1-z2;
  return sqrt(dx*dx + dy*dy + dz*dz);
}

double sx = 0;
double sy = 0;
double sz = 0;
double sa = 0;
double sd = 0;

void draw() {
  background(0);
  int rx = 0;
  for (double a = -PI/3; a < PI/3; a += PI/(1.5*20)) {
    int ry = 0;
    for (double d = -PI/3; d < PI/3; d += PI/(1.5*20)) {
      double startx = sx;
      double starty = sy;
      double startz = sz;
      double sumdst = 0;
      for (int c = 0; c < 2; c++) {
        double dst = 1000000;
        for (int i = 0; i < ballsx.length; i++) {
          dst = min(dst, dist(ballsx[i], ballsy[i], ballsz[i], startx, starty, startz) - 0.5);
        }
        startx += cos(a+sa)*sin(d+sd)*dst;
        starty += sin(a+sa)*sin(d+sd)*dst;
        startz += cos(d+sd);
        sumdst += dst;
        if (dst < 0.01 /*|| c == 1*/) {
          fill(255);
          noStroke();
          rect(rx*16, ry*16, 16, 16);
          c = 2;
        }
      }
      ry++;
    }
    rx++;
  }
  if (keyPressed) {
    if (key == "w") {
      sd -= 0.01;
    } else if (key == "s") {
      sd += 0.01;
    } else if (key == "a") {
      sa -= 0.01;
    } else if (key == "d") {
      sa += 0.01;
    }
  }
}

Programado por segfaultdev

1 votos 188 descargas 15 usos