SDL2でMAPEditerを作る 〜第3回 機能の追加(マップチップの表示・カーソル座標の表示・スポイト機能)〜
前回までで、マップチップを選択してキャンパスに配置する所まで作成した。今回は現在選択されているマップチップの表示、カーソル座標の表示、キャンパスに配置したマップチップを選択するためのスポイト機能などを実装していこうと思う。
マップチップの表示
前回までの状態だと、今どのマップチップが選択されているのかがわからない状態だった。このままでも、マップ作成はできるのだが、どのマップチップを選択しているのかわかったほうがストレスが少ない。ということで、右上に選択されているマップチップを表示することにした。
以下のコードで右上に選択されているマップチップを表示している。白い四角形と黒い四角形を重ねてウィンドウを作りその中に選択中のマップチップを表示するようにした。
int draw_selected_mapchip(SDL_Renderer *renderer) { SDL_Rect rectangle; SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_BLEND); rectangle.x = 700; rectangle.y = 30; rectangle.w = 62; rectangle.h = 62; SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255); SDL_RenderFillRect(renderer, &rectangle); rectangle.x = 702; rectangle.y = 32; rectangle.w = 58; rectangle.h = 58; SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255); SDL_RenderFillRect(renderer, &rectangle); SDL_Rect imageRect=(SDL_Rect){0, 0, IMAGE_WIDTH, IMAGE_HEIGHT}; SDL_Rect drawRect=(SDL_Rect){715, 45, IMAGE_WIDTH*MAGNIFICATION, IMAGE_HEIGHT*MAGNIFICATION}; SDL_RenderCopy(renderer, mapchip[select_mapchip].map_image, &imageRect, &drawRect); return 0; }
画像だとこんな感じになる。
カーソル座標の表示
続いて、追加してのはカーソル座標の表示である。これは、-> SDL2で文字を表示するで試して以来おそらく初めてSDL2を使用して文字の表示を行ったと思う。コードは以下のようになった。
int draw_coordinate(SDL_Renderer *renderer, TTF_Font *font) { SDL_Surface *surface; SDL_Texture *texture; char path[256]; sprintf(path, "%03d %03d", cursor.map_x / GRID_SIZE, cursor.map_y / GRID_SIZE); surface = TTF_RenderUTF8_Blended(font, path, (SDL_Color){255,255,255,255}); //surfaceからTextureを作る texture =SDL_CreateTextureFromSurface(renderer, surface); SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255); //文字を描写したTextureのサイズを取得する int iw,ih; SDL_QueryTexture(texture, NULL, NULL, &iw, &ih); SDL_Rect txtRect=(SDL_Rect){0,0,iw,ih}; SDL_Rect pasteRect=(SDL_Rect){695,100,iw,ih}; SDL_RenderCopy(renderer, texture, &txtRect, &pasteRect); SDL_FreeSurface(surface); return 0; }
文字を表示した感想としては狙ったところに表示させるのがなかなか難しいかな、といったところ。ただ、SDL2を使えば容易に文字を表示できるのは確かだ。まあ、何はともあれ力技ではあるが狙ったところに表示できたので良しとしたい。(マップチップウィンドウの下に表示してみた)
スポイト機能の追加
マップを作っていくうえで、マップチップパレットに切り替えるまでもない修正、例えば隣のマップチップと同じものを 使いたい、といった場面は多々発生すると思われる。その時のために、マップ上のマップチップを設定できるスポイト機能を作成した。コードは以下になる。
int get_mapchip_with_key_a(SDL_Renderer *renderer) { select_mapchip = map_array[(cursor.map_y / GRID_SIZE) * COL + (cursor.map_x / GRID_SIZE)]; return 0; }
まぁ、コードとしては大したことなくキャンパス上で「a」キーを押すと、それを選択されているマップチップにしますよ といった、処理になる。ただ、コードは大したことはないがマップを書く上での効率化はものすごいものがあると思う。
全コード記載
では、今回の全コードを記載する。
#include <stdio.h> #include <SDL2/SDL.h> #include <SDL2/SDL_image.h> #include <SDL2/SDL_ttf.h> #define FONT_PATH "font/PixelMplus12-Bold.ttf" const int SCREEN_WIDTH = 800; const int SCREEN_HEIGHT = 600; const int IMAGE_WIDTH = 16; const int IMAGE_HEIGHT = 16; const int MAGNIFICATION = 2; const int GRID_SIZE = 32; const int PALLET_ROW = 15; const int PALLET_COL = 20; int ROW = 15; int COL = 20; int OUT_OF_MAP = 10; int frame = 0; int draw_coordinate(SDL_Renderer *, TTF_Font *); int clac_offset(int, int, int *, int *); int load_mapchip(SDL_Renderer *); int draw_map(SDL_Renderer *); int draw_pallet(SDL_Renderer *); int cursor_move(SDL_Event, SDL_Renderer *); int load_image(SDL_Renderer *, SDL_Texture **, char *); int place_mapchip(SDL_Point, SDL_Renderer *); int place_mapchip_with_key(SDL_Renderer *); int get_mapchip(SDL_Point, SDL_Renderer *); int get_mapchip_right_click(SDL_Point, SDL_Renderer *); int get_mapchip_with_key(SDL_Renderer *); int get_mapchip_with_key_a(SDL_Renderer *); int initialize(SDL_Renderer *); typedef struct { int map_x; int map_y; int offset_x; int offset_y; } CURSOR; typedef struct { int mapchip_id; char mapchip_name[256]; int movable; int change_locate; SDL_Texture *map_image; } MAPCHIP; CURSOR cursor = {1, 1, 0, 0}; CURSOR pallet_cursor = {1, 1, 0, 0}; MAPCHIP mapchip[256] = {0}; int *map_array; int *pallet_array; int number_of_map_image = 0; int select_mapchip = 0; int main (int argc, char *argv[]) { int IMAGE_WIDTH_SENTER = IMAGE_WIDTH * MAGNIFICATION / 2; int IMAGE_HEIGHT_SENTER = IMAGE_HEIGHT * MAGNIFICATION / 2; SDL_Window *window = NULL; SDL_Renderer *renderer = NULL; TTF_Font *font = NULL; // ウィンドウの位置 SDL_Point window_position = { SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED }; // ウィンドウのサイズ SDL_Point window_size = {SCREEN_WIDTH, SCREEN_HEIGHT}; // マウスの座標 SDL_Point mouse_position = {IMAGE_WIDTH_SENTER, IMAGE_WIDTH_SENTER}; //Initialize SDL if( SDL_Init( SDL_INIT_VIDEO ) < 0 ) { printf( "SDL could not initialize! SDL_Error: %s\n", SDL_GetError() ); return 1; } window = SDL_CreateWindow( "MAP CREATER", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, SCREEN_WIDTH, SCREEN_HEIGHT, SDL_WINDOW_SHOWN ); if( window == NULL ) { printf( "Window could not be created! SDL_Error: %s\n", SDL_GetError() ); return 1; } else { renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED); } //Initialize TTF if ( TTF_Init() < 0 ) { printf("TTFcould not initialize! TTF_Error: %s\n", TTF_GetError()); } font = TTF_OpenFont(FONT_PATH, 22); if ( font == NULL ) { printf("TTF_OpenFont: %s\n", TTF_GetError()); } initialize(renderer); int pallet_display = 1; // main loop while (1) { SDL_Event e; clac_offset(cursor.map_x, cursor.map_y, &cursor.offset_x, &cursor.offset_y); clac_offset(pallet_cursor.map_x, pallet_cursor.map_y, &pallet_cursor.offset_x, &pallet_cursor.offset_y); SDL_RenderClear(renderer); if (pallet_display == 0) { draw_pallet(renderer); pallet_move(e, renderer); } else { draw_map(renderer); cursor_move(e, renderer); } draw_selected_mapchip(renderer); draw_coordinate(renderer, font); SDL_RenderPresent(renderer); // event handling if ( SDL_PollEvent(&e) ) { if (e.type == SDL_QUIT) { break; } else if (e.type == SDL_KEYDOWN && e.key.keysym.sym == SDLK_ESCAPE) { break; } else if (e.type == SDL_KEYDOWN && e.key.keysym.sym == SDLK_i) { if (pallet_display == 0) { pallet_display = 1; } else { pallet_display = 0; } } else if (e.type == SDL_KEYDOWN && e.key.keysym.sym == SDLK_a && pallet_display == 1) { get_mapchip_with_key_a(renderer); } else if (e.type == SDL_KEYDOWN && e.key.keysym.sym == SDLK_SPACE && pallet_display == 0) { get_mapchip_with_key(renderer); } else if (e.type == SDL_KEYDOWN && e.key.keysym.sym == SDLK_SPACE && pallet_display == 1) { place_mapchip_with_key(renderer); } else if (e.type == SDL_MOUSEBUTTONDOWN && e.button.button == SDL_BUTTON_LEFT && pallet_display == 0) { get_mapchip(mouse_position, renderer); } else if (e.type == SDL_MOUSEBUTTONDOWN && e.button.button == SDL_BUTTON_LEFT && pallet_display == 1) { place_mapchip(mouse_position, renderer); } else if (e.type == SDL_MOUSEBUTTONDOWN && e.button.button == SDL_BUTTON_RIGHT && pallet_display == 1) { get_mapchip_right_click(mouse_position, renderer); } } } IMG_Quit(); SDL_DestroyRenderer(renderer); SDL_DestroyWindow(window); int i; for (i = 0;i < number_of_map_image;i++) { SDL_DestroyTexture(mapchip[i].map_image); } SDL_Quit(); return 0; } int initialize(SDL_Renderer *renderer) { map_array = malloc(sizeof(int) * COL * ROW); pallet_array = malloc(sizeof(int) * PALLET_COL * PALLET_ROW); load_mapchip(renderer); int i; for (i=0;i <= COL*ROW;i++) { map_array[i] = 1; } return 0; } int load_image(SDL_Renderer *renderer, SDL_Texture **image_texture, char *filename) { SDL_Surface *image = NULL; // 画像の読み込み image = IMG_Load(filename); if(!image) { printf("IMG_Load: %s\n", IMG_GetError()); return 1; } // 透過色の設定 SDL_SetColorKey(image, SDL_TRUE, SDL_MapRGB(image->format, 255, 0, 255)); *image_texture = SDL_CreateTextureFromSurface(renderer, image); SDL_FreeSurface(image); return 0; } int place_mapchip(SDL_Point mouse_position, SDL_Renderer *renderer) { SDL_GetMouseState(&mouse_position.x, &mouse_position.y); map_array[((cursor.offset_y + mouse_position.y) / GRID_SIZE)*COL + ((cursor.offset_x + mouse_position.x) / GRID_SIZE)] = select_mapchip; return 0; } int place_mapchip_with_key(SDL_Renderer *renderer) { map_array[(cursor.map_y / GRID_SIZE) * COL + (cursor.map_x / GRID_SIZE)] = select_mapchip; return 0; } int get_mapchip(SDL_Point mouse_position, SDL_Renderer *renderer) { SDL_GetMouseState(&mouse_position.x, &mouse_position.y); select_mapchip = pallet_array[((pallet_cursor.offset_y + mouse_position.y) / GRID_SIZE) * PALLET_COL + ((pallet_cursor.offset_x + mouse_position.x) / GRID_SIZE)]; return 0; } int get_mapchip_right_click(SDL_Point mouse_position, SDL_Renderer *renderer) { SDL_GetMouseState(&mouse_position.x, &mouse_position.y); select_mapchip = map_array[((cursor.offset_y + mouse_position.y) / GRID_SIZE) * COL + ((cursor.offset_x + mouse_position.x) / GRID_SIZE)]; return 0; } int get_mapchip_with_key(SDL_Renderer *renderer) { select_mapchip = pallet_array[(pallet_cursor.map_y / GRID_SIZE) * PALLET_COL + (pallet_cursor.map_x / GRID_SIZE)]; return 0; } int get_mapchip_with_key_a(SDL_Renderer *renderer) { select_mapchip = map_array[(cursor.map_y / GRID_SIZE) * COL + (cursor.map_x / GRID_SIZE)]; return 0; } int draw_selected_mapchip(SDL_Renderer *renderer) { SDL_Rect rectangle; SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_BLEND); rectangle.x = 700; rectangle.y = 30; rectangle.w = 62; rectangle.h = 62; SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255); SDL_RenderFillRect(renderer, &rectangle); rectangle.x = 702; rectangle.y = 32; rectangle.w = 58; rectangle.h = 58; SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255); SDL_RenderFillRect(renderer, &rectangle); SDL_Rect imageRect=(SDL_Rect){0, 0, IMAGE_WIDTH, IMAGE_HEIGHT}; SDL_Rect drawRect=(SDL_Rect){715, 45, IMAGE_WIDTH*MAGNIFICATION, IMAGE_HEIGHT*MAGNIFICATION}; SDL_RenderCopy(renderer, mapchip[select_mapchip].map_image, &imageRect, &drawRect); return 0; } int cursor_move(SDL_Event e, SDL_Renderer *renderer) { SDL_Rect rectangle; SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_BLEND); rectangle.x = cursor.map_x - cursor.offset_x; rectangle.y = cursor.map_y - cursor.offset_y; rectangle.w = GRID_SIZE; rectangle.h = GRID_SIZE; SDL_SetRenderDrawColor(renderer, 0, 0, 0, 100); SDL_RenderFillRect(renderer, &rectangle); if (frame % 12 == 0) { if (e.type == SDL_KEYDOWN && e.key.keysym.sym == SDLK_UP){ cursor.map_y = cursor.map_y - GRID_SIZE; } else if (e.type == SDL_KEYDOWN && e.key.keysym.sym == SDLK_DOWN){ cursor.map_y = cursor.map_y + GRID_SIZE; } else if (e.type == SDL_KEYDOWN && e.key.keysym.sym == SDLK_RIGHT){ cursor.map_x = cursor.map_x + GRID_SIZE; } else if (e.type == SDL_KEYDOWN && e.key.keysym.sym == SDLK_LEFT){ cursor.map_x = cursor.map_x - GRID_SIZE; } } if (frame <= 12000) { frame++; } else { frame = 0; } if (e.type == SDL_KEYDOWN && e.key.keysym.sym == SDLK_k){ cursor.map_y = cursor.map_y - GRID_SIZE; } else if (e.type == SDL_KEYDOWN && e.key.keysym.sym == SDLK_j){ cursor.map_y = cursor.map_y + GRID_SIZE; } else if (e.type == SDL_KEYDOWN && e.key.keysym.sym == SDLK_l){ cursor.map_x = cursor.map_x + GRID_SIZE; } else if (e.type == SDL_KEYDOWN && e.key.keysym.sym == SDLK_h){ cursor.map_x = cursor.map_x - GRID_SIZE; } return 0; } int pallet_move(SDL_Event e, SDL_Renderer *renderer) { SDL_Rect rectangle; SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_BLEND); rectangle.x = pallet_cursor.map_x - pallet_cursor.offset_x; rectangle.y = pallet_cursor.map_y - pallet_cursor.offset_y; rectangle.w = GRID_SIZE; rectangle.h = GRID_SIZE; SDL_SetRenderDrawColor(renderer, 0, 0, 0, 100); SDL_RenderFillRect(renderer, &rectangle); if (frame % 12 == 0) { if (e.type == SDL_KEYDOWN && e.key.keysym.sym == SDLK_UP){ pallet_cursor.map_y = pallet_cursor.map_y - GRID_SIZE; } else if (e.type == SDL_KEYDOWN && e.key.keysym.sym == SDLK_DOWN){ pallet_cursor.map_y = pallet_cursor.map_y + GRID_SIZE; } else if (e.type == SDL_KEYDOWN && e.key.keysym.sym == SDLK_RIGHT){ pallet_cursor.map_x = pallet_cursor.map_x + GRID_SIZE; } else if (e.type == SDL_KEYDOWN && e.key.keysym.sym == SDLK_LEFT){ pallet_cursor.map_x = pallet_cursor.map_x - GRID_SIZE; } } if (frame <= 12000) { frame++; } else { frame = 0; } if (e.type == SDL_KEYDOWN && e.key.keysym.sym == SDLK_k){ pallet_cursor.map_y = pallet_cursor.map_y - GRID_SIZE; } else if (e.type == SDL_KEYDOWN && e.key.keysym.sym == SDLK_j){ pallet_cursor.map_y = pallet_cursor.map_y + GRID_SIZE; } else if (e.type == SDL_KEYDOWN && e.key.keysym.sym == SDLK_l){ pallet_cursor.map_x = pallet_cursor.map_x + GRID_SIZE; } else if (e.type == SDL_KEYDOWN && e.key.keysym.sym == SDLK_h){ pallet_cursor.map_x = pallet_cursor.map_x - GRID_SIZE; } return 0; } int draw_map(SDL_Renderer *renderer){ int x, y; int start_x = cursor.offset_x / GRID_SIZE - 1; int end_x = start_x + SCREEN_WIDTH / GRID_SIZE + 2; int start_y = cursor.offset_y / GRID_SIZE - 1; int end_y = start_y + SCREEN_HEIGHT/ GRID_SIZE + 2; for(y = start_y;y < end_y;y++){ for(x = start_x; x < end_x;x++){ SDL_Rect imageRect=(SDL_Rect){0, 0, IMAGE_WIDTH, IMAGE_HEIGHT}; SDL_Rect drawRect=(SDL_Rect){(x * GRID_SIZE) - cursor.offset_x, (y * GRID_SIZE) - cursor.offset_y, IMAGE_WIDTH*MAGNIFICATION, IMAGE_HEIGHT*MAGNIFICATION}; if ((x < 0) || (x > COL - 1) || (y < 0) || (y > ROW - 1)){ SDL_RenderCopy(renderer, mapchip[OUT_OF_MAP].map_image, &imageRect, &drawRect); } else { SDL_RenderCopy(renderer, mapchip[map_array[y*COL+x]].map_image, &imageRect, &drawRect); } } } return 0; } int draw_pallet(SDL_Renderer *renderer){ int x, y; int start_x = pallet_cursor.offset_x / GRID_SIZE - 1; int end_x = start_x + SCREEN_WIDTH / GRID_SIZE + 2; int start_y = pallet_cursor.offset_y / GRID_SIZE - 1; int end_y = start_y + SCREEN_HEIGHT/ GRID_SIZE + 2; for(y = start_y;y < end_y;y++){ for(x = start_x; x < end_x;x++){ SDL_Rect imageRect=(SDL_Rect){0, 0, IMAGE_WIDTH, IMAGE_HEIGHT}; SDL_Rect drawRect=(SDL_Rect){(x * GRID_SIZE) - pallet_cursor.offset_x, (y * GRID_SIZE) - pallet_cursor.offset_y, IMAGE_WIDTH*MAGNIFICATION, IMAGE_HEIGHT*MAGNIFICATION}; if ((x < 0) || (x > PALLET_COL - 1) || (y < 0) || (y > PALLET_ROW - 1)){ SDL_RenderCopy(renderer, mapchip[OUT_OF_MAP].map_image, &imageRect, &drawRect); } else { if(number_of_map_image >= y*PALLET_COL+x) { SDL_RenderCopy(renderer, mapchip[pallet_array[y*PALLET_COL+x]].map_image, &imageRect, &drawRect); } else { SDL_RenderCopy(renderer, mapchip[OUT_OF_MAP].map_image, &imageRect, &drawRect); } } } } return 0; } int load_mapchip(SDL_Renderer *renderer) { FILE *fp; int x, y, z; char n[256]; char path[256]; char buf[256]; int i = 0; fp = fopen("data/mapchip.dat", "r"); if (fp == NULL) { printf("file open error. %d\n", __LINE__); return 1; } for(i = 0;fgets(buf, sizeof(buf), fp) != NULL;i++){ sscanf(buf, "%d,%[^,],%d,%d", &x, n, &y, &z); mapchip[i].mapchip_id = x; strcpy(mapchip[i].mapchip_name, n); mapchip[i].movable = y; mapchip[i].change_locate = z; sprintf(path, "image/mapchip/%s.bmp", mapchip[i].mapchip_name); load_image(renderer, &mapchip[i].map_image, path); pallet_array[i] = x; } number_of_map_image = i - 1; fclose(fp); return 0; } int clac_offset(int x, int y, int *offset_x, int *offset_y) { *offset_x = x - (SCREEN_WIDTH / 2); *offset_y = y - (SCREEN_HEIGHT / 2); return 0; } int draw_coordinate(SDL_Renderer *renderer, TTF_Font *font) { SDL_Surface *surface; SDL_Texture *texture; char path[256]; sprintf(path, "%03d %03d", cursor.map_x / GRID_SIZE, cursor.map_y / GRID_SIZE); surface = TTF_RenderUTF8_Blended(font, path, (SDL_Color){255,255,255,255}); //surfaceからTextureを作る texture =SDL_CreateTextureFromSurface(renderer, surface); SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255); //文字を描写したTextureのサイズを取得する int iw,ih; SDL_QueryTexture(texture, NULL, NULL, &iw, &ih); SDL_Rect txtRect=(SDL_Rect){0,0,iw,ih}; SDL_Rect pasteRect=(SDL_Rect){695,100,iw,ih}; SDL_RenderCopy(renderer, texture, &txtRect, &pasteRect); SDL_FreeSurface(surface); return 0; }
実行結果
今回実装分の見た目はこんな感じ。
終わりに
今回は、マップを書く上での利便性を良くするための機能を追加した。次回辺り、保存・読込といったあたりの実装ができればと思う。