add snake object

leesongun

Nov 3, 2022, 4:34 AM

RBIEBZNXMNKZRBVGKMB5DJ6HWMUAWFTGJQU3LFNU76GG55652X5QC

Dependencies

• [2] W22NXX6S initial commit

Change contents

• file addition: snake.zig (----------)
  [2.15]
  + const io = @import("io.zig");

  + const Cursor = @import("cursor.zig").Self;

  + const Map = @import("map.zig");

  +

  + neck: Map,

  + head: Cursor,

  + tail: Cursor,

  +

  + const Self = @This();

  +

  + pub fn init(start: Cursor) Self {

  + return .{

  + .head = start,

  + .tail = start,

  + .neck = .{},

  + };

  + }

  +

  + pub fn pushdir(self: *Self, dir: u2) void {

  + self.neck.store(self.head, dir);

  + self.head.dir = dir ^ 2;

  + }

  +

  + pub fn popdir(self: *Self) void {

  + self.neck.load(&self.tail);

  + self.neck.zero(self.tail);

  + }

  +

  + pub fn collide(self: Self) bool {

  + return self.head.mask() & self.neck.blank() == 0;

  + }

  +

  + pub fn empty(self:Self) u64 {

  + return self.neck.blank() & ~self.head.mask();

  + }

  +

  + //todo

  + pub fn print() void {

  + unreachable;

  + }
• replacement in src/game.zig at line 2
  [2.82]→[2.82:120](∅→∅)
  − const cursor = @import("cursor.zig");
  [2.82]

  [2.120]
  + const Snake = @import("snake.zig");
• replacement in src/game.zig at line 5
  [2.147]→[2.147:179](∅→∅)
  − var map = @import("map.zig"){};
  [2.147]

  [2.179]
  + var snake: Snake = undefined;
• edit in src/game.zig at line 7
  [2.224]→[2.224:284](∅→∅)
  − var head = cursor.init(0o40);

  − var tail = cursor.init(0o40);
• edit in src/game.zig at line 8
  [2.305]

  [2.305]
  + snake = Snake.init(.{ .pos = 0o40, .dir = 2 });
• replacement in src/game.zig at line 13
  [2.370]→[2.370:416](∅→∅)
  − io.print(head.pos, "<^>V"[head.dir]);
  [2.370]

  [2.416]
  + io.print(snake.head.pos, "<^>V"[snake.head.dir]);
• replacement in src/game.zig at line 15
  [2.436]→[2.436:674](∅→∅)
  − const newdir = io.scandir(head.dir);

  − io.print(head.pos, " lqml kxqk jmxj"[4 * @as(u4, newdir) + head.dir]);

  −

  − //push

  − map.store(head, newdir);

  − head.dir = newdir ^ 2;

  − head.move() orelse break;
  [2.436]

  [2.674]
  + const newdir = io.scandir(snake.head.dir);

  + io.print(snake.head.pos, " lqml kxqk jmxj"[4 * @as(u4, newdir) + snake.head.dir]);
• replacement in src/game.zig at line 18
  [2.675]→[2.675:787](∅→∅)
  − if (head.pos != fruit.pos) {

  − //pop

  − map.load(&tail);

  − map.zero(tail);
  [2.675]

  [2.787]
  + snake.pushdir(newdir);

  + snake.head.move() orelse break;

  + if (snake.head.pos != fruit.pos) {

  + snake.popdir();
• replacement in src/game.zig at line 24
  [2.812]→[2.812:860](∅→∅)
  − if (head.mask() & map.blank() == 0)
  [2.812]

  [2.860]
  + if (snake.collide())
• replacement in src/game.zig at line 27
  [2.930]→[2.930:1011](∅→∅)
  − io.print(tail.pos, ' ');

  − tail.move() orelse unreachable;
  [2.930]

  [2.1011]
  + io.print(snake.tail.pos, ' ');

  + snake.tail.move() orelse unreachable;
• replacement in src/game.zig at line 34
  [2.1082]→[2.1082:1154](∅→∅)
  − fruit.newfruit(map.blank() ^ cursor.mask(head)) orelse return null;
  [2.1082]

  [2.1154]
  + fruit.newfruit(snake.empty()) orelse return null;