Anonymous user
Galton box animation: Difference between revisions
Updated D entry
(Updated D entry) |
(Updated D entry) |
||
Line 405:
enum centerH = pinsBaseW + (boxW - (pinsBaseW * 2 - 1)) / 2 - 1;
enum Cell : char { empty = ' ',
floor
pin
pin = '.' }▼
Cell[boxW][boxH] box; // Galton box. Will be printed upside-down.
Line 418 ⟶ 417:
int x, y; // Position.
this(in int x_, in int y_) nothrow @safe @nogc
in {
assert(box[y_][x_] == Cell.empty);
Line 436 ⟶ 435:
return; // Reached the bottom of the box.
final switch (box[y - 1][x]) with (Cell) {
box[y][x] =
case ball, wall, corner, floor:
// It's frozen. (It always piles on other balls).
box[y][x] = Cell.ball;
} else
box[y][x] =
▲ box[y][x + 1] == Cell.empty) {
▲ else
▲ x--;
▲ box[y][x] = Cell.ball;
▲ break;
▲ }
}
}
Line 467 ⟶ 464:
void initializeBox() {
// Set ceiling and floor:
box[0][] =
box[$ - 1][] = box[0][];
// Set walls:
foreach (immutable r; 1 .. boxH - 1)
box[r][0] = box[r][$ - 1] = Cell.wall;
Line 478 ⟶ 474:
foreach (immutable nPins; 1 .. pinsBaseW + 1)
foreach (pin; 0 .. nPins)
box[boxH - 2 - nPins][centerH + 1 - nPins + pin * 2] = Cell.pin;
}
void drawBox() {
foreach_reverse (const ref row; box)
}
Line 495 ⟶ 490:
if (i < nMaxBalls)
balls ~= Ball(centerH, boxH - 2); // Add ball.
drawBox
// Next step for the simulation.
| |||