PuzzleProject2021/block.py at main · firluk/PuzzleProject2021 · GitHub

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import copy
import numpy as np


class cellInBlock:

    def __init__(self, piece_ind=None, facet_piece_ind=None):
        self.piece_ind = piece_ind
        self.facet_piece_ind = facet_piece_ind

    def rotateCell(self, angle):
        # 1 - left; 2 - flip; 3 - right
        if self.piece_ind >= 0:
            if angle == 1:
                self.left()
            elif angle == 2:
                self.left()
                self.left()
            elif angle == 3:
                self.left()
                self.left()
                self.left()

    def left(self):
        # rotate cell left
        if self.facet_piece_ind == 0:
            self.facet_piece_ind = 3
        else:
            self.facet_piece_ind -= 1


class Block:

    def __init__(self, block_id):
        self.block = np.expand_dims(np.array([cellInBlock(block_id, 0)]), axis=1)
        self.id = block_id

    def rotateBlock(self, angle):
        # 1 - left; 2 - flip; 3 - right
        if angle == 1:
            self.block = np.rot90(self.block, 1)
        elif angle == 2:
            self.block = np.rot90(self.block, 2)
        elif angle == 3:
            self.block = np.rot90(self.block, -1)
        for cell in self.block.flatten():
            if cell is not None:
                cell.rotateCell(angle)

    def findCellInBlock(self, p):
        for i in range(self.block.shape[0]):
            for j in range(self.block.shape[1]):
                if self.block[i][j] is not None and self.block[i][j].piece_ind == p:
                    return (i, j), self.block[i][j].facet_piece_ind


def rotateBlockBeforeJoin(block, fp, fp_up, side):
    # side = 1 for block_a; side = 2 for block_b
    flip = 0
    if side == 2:
        flip = 2
    if fp == fp_up:
        block.rotateBlock(3 - flip)
    elif abs(fp - fp_up) == 1 + flip:
        block.rotateBlock(2)
    elif abs(fp - fp_up) == 2:
        block.rotateBlock(1 + flip)


def validateMatch(score_mat, cell_lu, cell_rd, dir):
    # score_mat is either IoU, Mahalanobis or CMP
    # dir 0 - hor; 1 - ver
    # lu - left/up; rd - right/down
    rd_tmp = copy.deepcopy(cell_rd)
    lu_tmp = copy.deepcopy(cell_lu)
    if dir == 0:
        lu_tmp.rotateCell(1)
        rd_tmp.rotateCell(3)
    else:
        lu_tmp.rotateCell(2)
    if rd_tmp.piece_ind >= lu_tmp.piece_ind:
        if score_mat[lu_tmp.piece_ind][rd_tmp.piece_ind][lu_tmp.facet_piece_ind][rd_tmp.facet_piece_ind] == 0:
            del lu_tmp, rd_tmp
            return False
        else:
            del lu_tmp, rd_tmp
            return True
    else:
        if score_mat[rd_tmp.piece_ind][lu_tmp.piece_ind][rd_tmp.facet_piece_ind][lu_tmp.facet_piece_ind] == 0:
            del lu_tmp, rd_tmp
            return False
        else:
            del lu_tmp, rd_tmp
            return True


def joinBlocks(block_a, block_b, p_a, fp_a, p_b, fp_b, score_mat):
    # in: indices of pieces and facets connected by valid edge
    # directions right/left/above/below are relative to block_a
    _, fp_a_up = block_a.findCellInBlock(p_a)
    _, fp_b_up = block_b.findCellInBlock(p_b)
    block_a_rotated = copy.deepcopy(block_a)
    block_b_rotated = copy.deepcopy(block_b)

    rotateBlockBeforeJoin(block_a_rotated, fp_a, fp_a_up, 1)
    rotateBlockBeforeJoin(block_b_rotated, fp_b, fp_b_up, 2)

    p_a_location, _ = block_a_rotated.findCellInBlock(p_a)
    p_b_location, _ = block_b_rotated.findCellInBlock(p_b)

    # <editor-fold desc="define borders">
    a_right_border = block_a_rotated.block.shape[1]
    a_lower_border = block_a_rotated.block.shape[0]
    # a_upper_border, a_left_border = 0, 0
    dist_left_p_a = p_a_location[1]
    dist_upper_p_a = p_a_location[0]
    dist_right_p_a = a_right_border - p_a_location[1]
    dist_lower_p_a = a_lower_border - p_a_location[0]

    b_right_border = block_b_rotated.block.shape[1]
    b_lower_border = block_b_rotated.block.shape[0]
    # b_upper_border, b_left_border = 0, 0
    dist_left_p_b = p_b_location[1]
    dist_upper_p_b = p_b_location[0]
    dist_right_p_b = b_right_border - p_b_location[1]
    dist_lower_p_b = b_lower_border - p_b_location[0]
    # </editor-fold>
    # <editor-fold desc="prep blocks for joining">
    diff = dist_left_p_b - dist_left_p_a
    if diff > 1:
        block_a_rotated.block = np.hstack(
            (np.empty((block_a_rotated.block.shape[0], abs(diff) - 1), cellInBlock), block_a_rotated.block))
    elif diff < 1:
        block_b_rotated.block = np.hstack(
            (np.empty((block_b_rotated.block.shape[0], abs(diff) + 1), cellInBlock), block_b_rotated.block))

    diff = dist_right_p_b - dist_right_p_a
    if diff > -1:
        block_a_rotated.block = np.hstack(
            (block_a_rotated.block, np.empty((block_a_rotated.block.shape[0], abs(diff) + 1), cellInBlock)))
    elif diff < -1:
        block_b_rotated.block = np.hstack(
            (block_b_rotated.block, np.empty((block_b_rotated.block.shape[0], abs(diff) - 1), cellInBlock)))

    diff = dist_upper_p_b - dist_upper_p_a
    if diff > 0:
        block_a_rotated.block = np.vstack(
            (np.empty((abs(diff), block_a_rotated.block.shape[1]), cellInBlock), block_a_rotated.block))
    elif diff < 0:
        block_b_rotated.block = np.vstack(
            (np.empty((abs(diff), block_b_rotated.block.shape[1]), cellInBlock), block_b_rotated.block))

    diff = dist_lower_p_b - dist_lower_p_a
    if diff > 0:
        block_a_rotated.block = np.vstack(
            (block_a_rotated.block, np.empty((abs(diff), block_a_rotated.block.shape[1]), cellInBlock)))
    elif diff < 0:
        block_b_rotated.block = np.vstack(
            (block_b_rotated.block, np.empty((abs(diff), block_b_rotated.block.shape[1]), cellInBlock)))
    # </editor-fold>

    joined_block = np.empty(block_a_rotated.block.shape, cellInBlock)

    used_edge_stack = []

    for i, (row_a, row_b) in enumerate(zip(block_a_rotated.block, block_b_rotated.block)):
        for j, (cell_a, cell_b) in enumerate(zip(row_a, row_b)):
            # overlap verification
            if cell_a is not None and cell_b is not None:
                return False
            if j < block_a_rotated.block.shape[1] - 1:
                if cell_a is not None and block_b_rotated.block[i][j + 1] is not None:
                    if validateMatch(score_mat, cell_a, block_b_rotated.block[i][j + 1], 0) is False:
                        return False
                    else:
                        used_edge_stack.append([cell_a.piece_ind, block_b_rotated.block[i][j + 1].piece_ind,
                                                cell_a.facet_piece_ind,
                                                block_b_rotated.block[i][j + 1].facet_piece_ind])
                elif cell_b is not None and block_a_rotated.block[i][j + 1] is not None:
                    if validateMatch(score_mat, cell_b, block_a_rotated.block[i][j + 1], 0) is False:
                        return False
                    else:
                        used_edge_stack.append([cell_b.piece_ind, block_a_rotated.block[i][j + 1].piece_ind,
                                                cell_b.facet_piece_ind,
                                                block_a_rotated.block[i][j + 1].facet_piece_ind])
            if i < block_a_rotated.block.shape[0] - 1:
                if cell_a is not None and block_b_rotated.block[i + 1][j] is not None:
                    if validateMatch(score_mat, cell_a, block_b_rotated.block[i + 1][j], 1) is False:
                        return False
                    else:
                        used_edge_stack.append([cell_a.piece_ind, block_b_rotated.block[i + 1][j].piece_ind,
                                                cell_a.facet_piece_ind,
                                                block_b_rotated.block[i + 1][j].facet_piece_ind])
                elif cell_b is not None and block_a_rotated.block[i + 1][j] is not None:
                    if validateMatch(score_mat, cell_b, block_a_rotated.block[i + 1][j], 1) is False:
                        return False
                    else:
                        used_edge_stack.append([cell_b.piece_ind, block_a_rotated.block[i + 1][j].piece_ind,
                                                cell_b.facet_piece_ind,
                                                block_a_rotated.block[i + 1][j].facet_piece_ind])
            if cell_a is None and cell_b is not None:
                joined_block[i][j] = cell_b
            elif cell_a is not None and cell_b is None:
                joined_block[i][j] = cell_a

    return joined_block, used_edge_stack