51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
/*
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* BreakHack - A dungeone crawler RPG
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* Copyright (C) 2018 Linus Probert <linus.probert@gmail.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "camera.h"
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#include "map.h"
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Position camera_to_camera_position(Camera *cam, Position *pos)
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{
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return (Position) {
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pos->x - cam->pos.x,
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pos->y - cam->pos.y
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};
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}
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void camera_follow_position(Camera *cam, Position *pos)
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{
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int room_width, room_height;
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room_width = MAP_ROOM_WIDTH * TILE_DIMENSION;
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room_height = MAP_ROOM_HEIGHT * TILE_DIMENSION;
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if (pos->x <= 0)
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cam->pos.x = 0;
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else if (pos->x >= room_width * MAP_H_ROOM_COUNT)
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cam->pos.x = room_width * (MAP_H_ROOM_COUNT - 1);
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else
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cam->pos.x = pos->x - (pos->x % room_width);
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if (pos->y <= 0)
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cam->pos.y = 0;
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else if (pos->y >= room_height * MAP_V_ROOM_COUNT)
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cam->pos.y = room_height * (MAP_V_ROOM_COUNT - 1);
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else
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cam->pos.y = pos->y - (pos->y % room_height);
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}
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