# MIT License
# 
# Copyright (c) 2026 Tidepost contributors
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
# 
# Exception: assets/glyphs.json contains rasterized glyph data derived from
# Noto Sans CJK JP (SIL Open Font License 1.1). See assets/NOTO-LICENSE.txt.
# Pyxel is an external dependency under its own MIT license.

"""世界のマス番号、表示範囲、画面のピクセルを分ける。Pyxel不要。"""
TILE = 16
ORIGIN = (8, 8)
VIEW = (4, 3)
CAMERA = (2, 1)


def world_to_screen(col, row):
    local_col, local_row = col-CAMERA[0], row-CAMERA[1]
    if not (0<=local_col<VIEW[0] and 0<=local_row<VIEW[1]):
        return None
    return ORIGIN[0]+local_col*TILE, ORIGIN[1]+local_row*TILE


def screen_to_world(x, y):
    local_x, local_y = x-ORIGIN[0], y-ORIGIN[1]
    if not (0<=local_x<VIEW[0]*TILE and 0<=local_y<VIEW[1]*TILE):
        return None
    return CAMERA[0]+local_x//TILE, CAMERA[1]+local_y//TILE


def main():
    print("world cell (5,3):", world_to_screen(5,3))
    print("world cell (6,3):", world_to_screen(6,3))
    print("screen pixel (71,55):", screen_to_world(71,55))
    print("screen pixel (72,55):", screen_to_world(72,55))
    print("left of view (7,8):", screen_to_world(7,8))


if __name__ == "__main__":
    main()