WIP: "Maze" magic tool
This commit is contained in:
Bill Kendrick
parent
a979ada66e
commit
c15b6a176c
2 changed files with 426 additions and 1 deletions
422
magic/src/maze.c
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422
magic/src/maze.c
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/* maze.c
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Applys a lense effect like mazes of water dripping
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down a pane of glass. Applies an additive brush at
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the mouse pointer, and a subtractive brush slightly
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above (to simulate the water breaking up due to
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evaporation), only allowing the draw path to go downwards,
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and the left/right delta to change slightly (will not
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follow the mouse precisely). Upon release, the lense
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effect will be applied.
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Last modified: 2023.01.21
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*/
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#include <stdio.h>
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#include <string.h>
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#include <libintl.h>
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#include <math.h>
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#include "tp_magic_api.h"
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#include "SDL_image.h"
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#include "SDL_mixer.h"
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#define MAZE_BLOCK_SIZE 8
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#define MAZE_PAINT_RADIUS ((MAZE_BLOCK_SIZE * 3) + 2)
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#define MAZE_HALL 0
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#define MAZE_UP 1
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#define MAZE_DOWN 2
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#define MAZE_LEFT 3
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#define MAZE_RIGHT 4
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#define MAZE_START 5
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#define MAZE_WALL 255
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int xm[4] = { 0, 0, -1, 1 };
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int ym[4] = { -1, 1, 0, 0 };
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Mix_Chunk *snd_effect = NULL;
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Uint8 * maze_mask = NULL, * maze_array = NULL;
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Uint32 * maze_color;
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Uint8 maze_r, maze_g, maze_b;
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int maze_start_x, maze_start_y;
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SDL_Surface * maze_snapshot = NULL;
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Uint32 maze_api_version(void);
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int maze_init(magic_api * api);
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int maze_get_tool_count(magic_api * api);
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SDL_Surface *maze_get_icon(magic_api * api, int which);
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char *maze_get_name(magic_api * api, int which);
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int maze_get_group(magic_api * api, int which);
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char *maze_get_description(magic_api * api, int which, int mode);
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int maze_requires_colors(magic_api * api, int which);
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int maze_modes(magic_api * api, int which);
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void maze_shutdown(magic_api * api);
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void maze_click(magic_api * api, int which, int mode,
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SDL_Surface * canvas, SDL_Surface * snapshot, int x,
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int y, SDL_Rect * update_rect);
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void maze_set_color(magic_api * api, Uint8 r, Uint8 g, Uint8 b);
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void maze_drag(magic_api * api, int which, SDL_Surface * canvas,
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SDL_Surface * snapshot, int ox, int oy, int x, int y,
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SDL_Rect * update_rect);
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void maze_line_callback_drag(void *ptr, int which, SDL_Surface * canvas,
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SDL_Surface * snapshot, int x, int y);
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void maze_release(magic_api * api, int which, SDL_Surface * canvas,
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SDL_Surface * snapshot, int x, int y,
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SDL_Rect * update_rect);
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void maze_switchin(magic_api * api, int which, int mode,
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SDL_Surface * canvas);
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void maze_switchout(magic_api * api, int which, int mode,
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SDL_Surface * canvas);
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void zero_maze_arrays(SDL_Surface * canvas);
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void draw_hall(SDL_Surface * canvas, int x, int y);
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Uint32 maze_api_version(void)
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{
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return (TP_MAGIC_API_VERSION);
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}
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int maze_init(magic_api * api)
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{
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char fname[1024];
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/* FIXME */
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// snprintf(fname, sizeof(fname), "%ssounds/magic/maze.ogg",
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// api->data_directory);
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// snd_effect = Mix_LoadWAV(fname);
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return (1);
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}
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int maze_get_tool_count(magic_api * api ATTRIBUTE_UNUSED)
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{
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return (1);
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}
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SDL_Surface *maze_get_icon(magic_api * api, int which ATTRIBUTE_UNUSED)
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{
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char fname[1024];
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snprintf(fname, sizeof(fname), "%simages/magic/rivulet.png", /* FIXME */
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api->data_directory);
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return (IMG_Load(fname));
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}
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char *maze_get_name(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED)
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{
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return strdup(gettext("Maze"));
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}
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int maze_get_group(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED)
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{
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return MAGIC_TYPE_PAINTING;
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}
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char *maze_get_description(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED,
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int mode ATTRIBUTE_UNUSED)
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{
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if (mode == MODE_PAINT)
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return(gettext("Click and drag to paint a maze on your picture."));
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else
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return(gettext("Click to turn your entire picture into a maze."));
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}
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int maze_requires_colors(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED)
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{
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return 1;
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}
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int maze_modes(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED)
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{
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return MODE_PAINT /* | MODE_FULLSCREEN FIXME */;
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}
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void maze_shutdown(magic_api * api ATTRIBUTE_UNUSED)
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{
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if (snd_effect != NULL)
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Mix_FreeChunk(snd_effect);
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if (maze_mask != NULL)
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free(maze_mask);
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if (maze_array != NULL)
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free(maze_array);
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if (maze_color != NULL)
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free(maze_color);
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}
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void
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maze_click(magic_api * api, int which, int mode,
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SDL_Surface * canvas, SDL_Surface * snapshot, int x, int y,
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SDL_Rect * update_rect)
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{
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if (maze_array == NULL || maze_mask == NULL || maze_color == NULL || maze_snapshot == NULL) {
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return;
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}
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if (snd_effect != NULL)
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{
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api->stopsound();
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api->playsound(snd_effect, (x * 255) / canvas->w, 255);
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}
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if (maze_start_x == -1) {
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maze_start_x = floor(x / MAZE_BLOCK_SIZE) * MAZE_BLOCK_SIZE + (MAZE_BLOCK_SIZE / 2);
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maze_start_y = floor(y / MAZE_BLOCK_SIZE) * MAZE_BLOCK_SIZE + (MAZE_BLOCK_SIZE / 2);
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}
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if (mode == MODE_PAINT) {
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maze_drag(api, which, canvas, snapshot, x, y, x, y, update_rect);
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} else {
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/* FIXME */
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}
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}
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void
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maze_drag(magic_api * api ATTRIBUTE_UNUSED, int which, SDL_Surface * canvas,
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SDL_Surface * snapshot, int ox ATTRIBUTE_UNUSED,
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int oy ATTRIBUTE_UNUSED, int x, int y, SDL_Rect * update_rect)
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{
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if (maze_array == NULL || maze_mask == NULL || maze_color == NULL || maze_snapshot == NULL) {
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return;
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}
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api->line((void *) api, which, canvas, snapshot, ox, oy, x, y, 1,
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maze_line_callback_drag);
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update_rect->x = 0;
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update_rect->y = 0;
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update_rect->w = canvas->w;
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update_rect->h = canvas->h;
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}
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#define STATE_DONE 0
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#define STATE_KEEPGOING 1
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#define STATE_PICKDIR 2
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void
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maze_release(magic_api * api, int which ATTRIBUTE_UNUSED,
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SDL_Surface * canvas, SDL_Surface * snapshot,
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int x, int y, /* ignored and reused in a for-loop */
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SDL_Rect * update_rect)
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{
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int nx, ny, btwn_nx, btwn_ny, state, dir, old_dir;
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Uint32 iter;
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if (maze_array == NULL || maze_mask == NULL || maze_color == NULL || maze_snapshot == NULL) {
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return;
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}
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/* Reset everything we've drawn [back to] wall: */
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memset(maze_array, MAZE_HALL, (canvas->w * canvas->h));
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for (y = 0; y < canvas->h; y++) {
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for (x = 0; x < canvas->w; x++) {
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if (maze_mask[y * canvas->w + x]) {
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maze_array[y * canvas->w + x] = MAZE_WALL;
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}
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}
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}
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/* Render a maze! */
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x = maze_start_x;
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y = maze_start_y;
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maze_array[y * canvas->w + x] = MAZE_START;
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state = STATE_PICKDIR;
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iter = 0;
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do {
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if (state == STATE_PICKDIR) {
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dir = (rand() % 4);
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old_dir = dir;
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}
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state = STATE_DONE;
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nx = x + (xm[dir] * MAZE_BLOCK_SIZE * 2);
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ny = y + (ym[dir] * MAZE_BLOCK_SIZE * 2);
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if (nx >= 0 && nx < canvas->w && ny >= 0 && ny < canvas->h && maze_array[ny * canvas->w + nx] == MAZE_WALL) {
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draw_hall(canvas, nx, ny);
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maze_array[ny * canvas->w + nx] = dir + 1;
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btwn_nx = x + (xm[dir] * MAZE_BLOCK_SIZE);
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btwn_ny = y + (ym[dir] * MAZE_BLOCK_SIZE);
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draw_hall(canvas, btwn_nx, btwn_ny);
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x = nx;
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y = ny;
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state = STATE_PICKDIR;
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}
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if (state == STATE_DONE) {
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dir = (dir + 1) % 4;
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if (dir != old_dir)
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state = STATE_KEEPGOING;
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}
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if (state == STATE_DONE) {
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dir = maze_array[y * canvas->w + x];
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draw_hall(canvas, x, y);
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if (dir != MAZE_START) {
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x = x - (xm[dir - 1] * MAZE_BLOCK_SIZE * 2);
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y = y - (ym[dir - 1] * MAZE_BLOCK_SIZE * 2);
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state = STATE_PICKDIR;
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}
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}
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iter++;
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}
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while (state != STATE_DONE && iter < 10000);
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if (iter >= 10000) printf("OUCH\n");
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/* Draw the maze onto the canvas */
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for (y = 0; y < canvas->h; y++) {
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for (x = 0; x < canvas->w; x++) {
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if (maze_array[y * canvas->w + x] == MAZE_WALL) {
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api->putpixel(canvas, x, y, maze_color[y * canvas->w + x]);
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} else {
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api->putpixel(canvas, x, y, api->getpixel(maze_snapshot, x, y));
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}
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}
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}
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update_rect->x = 0;
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update_rect->y = 0;
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update_rect->w = canvas->w;
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update_rect->h = canvas->h;
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}
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void maze_set_color(magic_api * api ATTRIBUTE_UNUSED,
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Uint8 r ATTRIBUTE_UNUSED, Uint8 g ATTRIBUTE_UNUSED, Uint8 b ATTRIBUTE_UNUSED)
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{
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maze_r = r;
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maze_g = g;
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maze_b = b;
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}
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void maze_line_callback_drag(void *ptr, int which ATTRIBUTE_UNUSED,
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SDL_Surface * canvas,
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SDL_Surface * snapshot ATTRIBUTE_UNUSED,
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int x, int y)
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{
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magic_api *api = (magic_api *) ptr;
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int xx, yy;
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Uint32 color;
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color = SDL_MapRGB(canvas->format, maze_r, maze_g, maze_b);
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x = (floor(x / MAZE_BLOCK_SIZE) * MAZE_BLOCK_SIZE);
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y = (floor(y / MAZE_BLOCK_SIZE) * MAZE_BLOCK_SIZE);
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for (yy = -MAZE_PAINT_RADIUS; yy < MAZE_PAINT_RADIUS; yy++) {
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if (y + yy > 0 && y + yy < canvas->h) {
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for (xx = -MAZE_PAINT_RADIUS; xx < MAZE_PAINT_RADIUS; xx++) {
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if (x + xx > 0 && x + xx < canvas->w) {
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maze_mask[(y + yy) * canvas->w + (x + xx)] = 1;
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maze_color[(y + yy) * canvas->w + (x + xx)] = color;
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api->putpixel(canvas, x + xx, y + yy, color);
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}
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}
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}
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}
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}
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void maze_switchin(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED,
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SDL_Surface * canvas)
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{
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if (maze_array == NULL)
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{
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maze_array = (Uint8 *) malloc(sizeof(Uint8) * canvas->w * canvas->h);
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if (maze_array == NULL)
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{
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fprintf(stderr, "maze: Cannot malloc() maze_array!\n");
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return;
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}
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}
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if (maze_mask == NULL)
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{
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maze_mask = (Uint8 *) malloc(sizeof(Uint8) * canvas->w * canvas->h);
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if (maze_mask == NULL)
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{
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fprintf(stderr, "maze: Cannot malloc() maze_mask!\n");
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return;
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}
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}
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if (maze_color == NULL)
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{
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maze_color = (Uint32 *) malloc(sizeof(Uint32) * canvas->w * canvas->h);
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if (maze_color == NULL)
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{
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fprintf(stderr, "maze: Cannot malloc() maze_color!\n");
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return;
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}
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}
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zero_maze_arrays(canvas);
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if (maze_snapshot == NULL)
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maze_snapshot = SDL_CreateRGBSurface(SDL_SWSURFACE, canvas->w, canvas->h,
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canvas->format->BitsPerPixel, canvas->format->Rmask,
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canvas->format->Gmask, canvas->format->Bmask,
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canvas->format->Amask);
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if (maze_snapshot != NULL)
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SDL_BlitSurface(canvas, NULL, maze_snapshot, NULL);
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}
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void maze_switchout(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED,
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int mode ATTRIBUTE_UNUSED,
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SDL_Surface * canvas ATTRIBUTE_UNUSED)
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{
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zero_maze_arrays(canvas);
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}
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void zero_maze_arrays(SDL_Surface * canvas)
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{
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maze_start_x = -1;
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maze_start_y = -1;
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if (maze_mask != NULL)
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memset(maze_mask, 0, (canvas->w * canvas->h));
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if (maze_array != NULL)
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memset(maze_array, MAZE_HALL, (canvas->w * canvas->h));
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if (maze_color != NULL)
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memset(maze_color, 0, (sizeof(Uint32) * (canvas->w * canvas->h)));
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}
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void draw_hall(SDL_Surface * canvas, int x, int y) {
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int xx, yy;
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for (yy = -MAZE_BLOCK_SIZE / 2; yy < MAZE_BLOCK_SIZE / 2; yy++) {
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if (y + yy >= 0 && y + yy < canvas->h) {
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for (xx = -MAZE_BLOCK_SIZE / 2; xx < MAZE_BLOCK_SIZE / 2; xx++) {
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if (x + xx >= 0 && x + xx < canvas->w) {
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maze_array[(y + yy) * canvas->w + (x + xx)] = MAZE_HALL;
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}
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}
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}
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}
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}
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