from libs import *
import mesh

class WorldRegion(mesh.SquareMesh):
    def __init__(self, size=16):
        super().__init__()
        self.grid = np.zeros((size, size, size), dtype=VOXEL_TYPE)

    def add_voxel(self, pos, vt=1):
        offset = vec([0.5, 0.0, 0.0])
        for a in range(1, 4):
            self.add_sq(a, 1, pos + offset, pos)
            self.add_sq(-a, 1, pos - offset, pos)
            offset = np.roll(offset, 1, 0)
        self.grid[pos] = vt
        return len(self.faces) - 12

    def del_voxel(self, ind):
        b = (ind // 12) * 12
        self.grid[self.faces[ind][1]] = 0
        for i in range(6):
            self.del_sq(b)