atomizer/src/atom/stack.py at main · xavierchermain/atomizer · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
import taichi as ti
import taichi.math as tm


@ti.data_oriented
class Stack:
    def __init__(self, dtype, max_stack) -> None:
        self._field = ti.field(dtype=dtype, shape=(max_stack, ))
        self.index = ti.field(dtype=ti.int32, shape=())
        self.index[None] = -1

    @ti.func
    def push(self, val):
        self.index[None] += 1
        self._field[self.index[None]] = val

    @ti.func
    def pop(self):
        val = self._field[self.index[None]]
        self.index[None] -= 1
        return val

    @ti.func
    def clear(self):
        self.index[None] = -1

    @ti.func
    def length(self):
        return self.index[None] + 1

    @ti.func
    def is_empty(self):
        return self.index[None] < 0

    def to_list(self):
        ret = []
        for i in range(self.index[None] + 1):
            ret.append(self._field[i])
        return ret