Descubre la Programación : Muestra

double max(double a, double b) {
  return a>b?a:b;
}

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

class Ball {
	boolean magn;
  boolean powered;
	public double x;
	public double y;
	double rot;
	double dx;
	double dy;
	double size;
	double force;
	boolean solid;
	boolean staticm;
	Ball(int ux, int uy, int sz, boolean s, boolean cm, boolean grv, boolean power) {
		magn = grv;
		x = ux;
		y = uy;
		size = sz;
		rot = 0;
		force = 0;
		solid = s;
		staticm = cm;
    powered = power;
	}
	void gravity(double g) {
		dy += g;
	}
	void setDir() {
		dx += cos(rot) * force;
		dy += sin(rot) * force;
	}
	void applyFriction(double f) {
		dx *= f;
		dy *= f;
	}
	void move() {
		if (!staticm) {
			if (solid) {
				if (x - (size / 2) <= 0 || x + (size / 2) >= 319) {
					if (x - (size / 2) <= 0) {
						dx = abs(dx)*bfric;
					} else {
						dx = -abs(dx)*bfric;
					}
					x = (x - (size / 2) <= 0) ? (1 + (size / 2)) : (318 - (size / 2));
				}
				if (y - (size / 2) <= 0 || y + (size / 2) >= 319) {
					if (y - (size / 2) <= 0) {
						dy = abs(dy)*bfric;
					} else {
						dy = -abs(dy)*bfric;
					}
					y = (y - (size / 2) <= 0) ? (1 + (size / 2)) : (318 - (size / 2));
				}
			}
			x += dx;
			y += dy;
		}
	}
	void show() {
		if (staticm) {
			fill(192);
		} else if (magn) {
			fill(255, 127, 0);
    } else if (powered) {
      fill(255, 255, 63);
    } else {
			fill(255);
		}
		noStroke();
		ellipse(x, y, size, size);
	}
};

// bug list
// - when ball collides with +2 balls at the same time the one with movement disappears
// - (unknown cause) crashes browser

final int balls = 200;
final double clsloss = 0.1;

Ball b[] = new Ball[balls];

int gb = 0;

int mx = -1;
int my = -1;
int s = -1;
boolean t = false;

void main() {
  println("Si pones el cursor sobre una figura y");
  println("mantienes el boton izquierdo del raton");
  println("podras ver una linea. Cuando sueltes,");
  println("lanzara la figura en la direccion");
  println("contraria a la que has movido el raton.");
  println("Cuanto mas lejos este el raton, mas");
  println("rapido y con mas fuerza se mueve.");
  animate(draw);
}

void avoid() {
  for (int i = 0; i < gb; i++) {
    for (int j = i; j < gb; j++) {
      if (i != j) {
        Ball ba = b[i];
        Ball bb = b[j];
        double di = dist(ba.x, ba.y, bb.x, bb.y);
        double siz = (ba.size/2) + (bb.size/2);
        if (di < siz) {
          double bs1 = abs(sqrt((b[i].dx*b[i].dx) + (b[i].dy*b[i].dy)));
          double bs2 = abs(sqrt((b[j].dx*b[j].dx) + (b[j].dy*b[j].dy)));
          double bm1 = PI*(ba.size/2)*(ba.size/2);
          double bm2 = PI*(bb.size/2)*(bb.size/2);
          double bf2 = abs((((bs1)*(bm1/(bm1+bm2)))+bs2)-(clsloss/2));
          double bf1 = abs((((bs2)*(bm2/(bm1+bm2)))+bs1)-(clsloss/2));
          double an = angle(ba.x, ba.y, bb.x, bb.y);
          while ((!(b[i].staticm || b[j].staticm)) && (bf1+bf2 > bs1+bs2)) {
            if (!b[i].staticm) {
              bf1 *= 0.99;
            }
            if (!b[j].staticm) {
              bf2 *= 0.99;
            }
          }
          if (ba.magn || bb.magn) {
            b[i].dx = (cos(an)*bf1);
            b[i].dy = (sin(an)*bf1);
            b[j].dx = -(cos(an)*bf2);
            b[j].dy = -(sin(an)*bf2);
          } else {
            b[i].dx = -(cos(an)*bf1);
            b[i].dy = -(sin(an)*bf1);
            b[j].dx = (cos(an)*bf2);
            b[j].dy = (sin(an)*bf2);
          }
        }
      }
    }
  }
}

double dist(double x1, double y1, double x2, double y2) {
  return sqrt(pow(x1-x2, 2) + pow(y1-y2, 2));
}

double atan2(double y, double x) {
    double u = atan(y/x);
    if( x < 0.0 ) {
        if( u > 0.0 )
            u -= PI;
        else
            u += PI;
    }
    return u;
}

double angle(double x1, double y1, double x2, double y2) {
  double res = atan2(y1-y2, x1-x2);
  res += PI;
  return res;
}

int nearestBall(int a, int c) {
  double betterd = 400;
  int ind = -1;
  for (int i = 0; i < gb; i++) {
    for (int j = 0; j < gb; j++) {
      if (dist(b[j].x, b[j].y, a, c) < betterd) {
        if (!(b[i].staticm || b[j].staticm)) {
          ind = j;
        	betterd = dist(b[j].x, b[j].y, a, c);
        }
      }
    }
  }
  return ind;
}

int tck = 0;
int tcki = 0;
int tcko = 0;
int oldx = -1;
int oldy = -1;
boolean first = true;

double grav = 0;
double fric = 0.9;
double bfric = 0.9;
void draw() {
  background(0);
  avoid();
  for (int i = 0; i < gb; i++) {
    if (grav != 0.0) {
      b[i].gravity(grav);
    }
    b[i].show();
  	b[i].move();
  	if (b[i].magn) {
      b[i].applyFriction(0);
    } else {
      b[i].applyFriction(fric);
    }
  }
  if (mousePressed && mouseButton == RIGHTBUTTON) {
    if (tcki == 0) {
      tcki++;
      oldx = mouseX;
      oldy = mouseY;
    }
    tcko = 0;
    noStroke();
    fill(255);
    ellipse(oldx, oldy, dist(oldx, oldy, mouseX, mouseY)*2, dist(oldx, oldy, mouseX, mouseY)*2);
    stroke(0, 255, 0);
    line(mouseX, mouseY, oldx, oldy);
    first = false;
  } else {
    tcki = 0;
    if (tcko == 0 && !first) {
      tcko++;
      boolean isStatic = (keyPressed&&(key=="up"));
      boolean magnetic = (keyPressed&&(key=="down"));
      boolean hasPower = (keyPressed&&(key=="shift"));
      if (gb < balls) {
        b[gb] = new Ball(oldx, oldy, round(dist(oldx, oldy, mouseX, mouseY)*2), true, isStatic, magnetic, hasPower);
        gb++;
      }
    }
  }
  if (gb > 0) {
    if (mousePressed && mouseButton == LEFTBUTTON) {
      if (tck == 0) {
        s = nearestBall(mouseX, mouseY);
      }
      tck++;
      stroke(255, 0, 0);
      strokeWeight(1);
      line(b[s].x, b[s].y, mouseX, mouseY);
      t = true;
    } else {
      tck = 0;
      if (t) {
        b[s].force = dist(b[s].x, b[s].y, mouseX, mouseY)/3;
        b[s].rot = angle(mouseX, mouseY, b[s].x, b[s].y);
        b[s].setDir();
        t = false;
      }
    }
  }
}

Programado por segfaultdev

5 votos 338 descargas 97 usos