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pad the game grid

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This commit is contained in:
Fredrik Robertsen
2025-03-31 02:11:36 +02:00
parent 5e6b3af3fc
commit f333df66ff
1 changed files with 15 additions and 11 deletions
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26
src/main.c
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@@ -10,10 +10,10 @@ static SDL_Renderer *renderer = NULL;
#define WINDOW_WIDTH 640
#define WINDOW_HEIGHT 480
#define GRID_PADDING 2
#define GRID_WIDTH 20
#define GRID_HEIGHT 20
#define TILE_WIDTH 20
#define TILE_HEIGHT 20
#define GRID_WIDTH 18
#define GRID_HEIGHT 15
#define TILE_WIDTH 24
#define TILE_HEIGHT 24
enum GRID_TILES { EMPTY, SNAKE, FRUIT };
enum SNAKE_PARTS { TAIL, BODY, HEAD };
@@ -27,18 +27,18 @@ typedef enum DIRECTION { LEFT, RIGHT, UP, DOWN } DIRECTION;
typedef struct Snake {
DIRECTION direction;
int length;
Uint8 length;
} Snake;
typedef struct State {
int grid[GRID_HEIGHT * GRID_WIDTH];
Uint8 grid[GRID_HEIGHT * GRID_WIDTH];
Snake *player;
} State;
#define SET_GRID_AT(grid, row, col, value) grid[row * GRID_WIDTH + col] = value
#define GET_GRID_AT(grid, row, col) grid[row * GRID_WIDTH + col]
void log_game_grid(int *game_grid) {
void log_game_grid(Uint8 *game_grid) {
char buf[GRID_WIDTH * 2];
for (int i = 0; i < GRID_HEIGHT; i++) {
for (int j = 0; j < GRID_WIDTH; j++) {
@@ -71,7 +71,7 @@ SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[]) {
SET_GRID_AT(state->grid, GRID_WIDTH / 2, GRID_HEIGHT / 2, SNAKE);
SET_GRID_AT(state->grid, 4, 12, FRUIT);
SET_GRID_AT(state->grid, 18, 5, FRUIT);
SET_GRID_AT(state->grid, 13, 5, FRUIT);
log_game_grid(state->grid);
@@ -90,7 +90,7 @@ SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event) {
SDL_AppResult SDL_AppIterate(void *appstate) {
State *stateptr = appstate;
int *game_grid = stateptr->grid;
Uint8 *game_grid = stateptr->grid;
SDL_SetRenderDrawColor(renderer, COLOR_BG);
SDL_RenderClear(renderer);
@@ -98,6 +98,10 @@ SDL_AppResult SDL_AppIterate(void *appstate) {
SDL_FRect rect;
rect.w = TILE_WIDTH;
rect.h = TILE_HEIGHT;
const int startx = (WINDOW_WIDTH - GRID_WIDTH * (TILE_WIDTH + GRID_PADDING)) / 2;
const int starty = (WINDOW_HEIGHT - GRID_HEIGHT * (TILE_HEIGHT + GRID_PADDING)) / 2;
SDL_Log("%d %d\n", startx, starty);
for (int i = 0; i < GRID_HEIGHT; i++) {
for (int j = 0; j < GRID_WIDTH; j++) {
switch (GET_GRID_AT(game_grid, i, j)) {
@@ -111,8 +115,8 @@ SDL_AppResult SDL_AppIterate(void *appstate) {
SDL_SetRenderDrawColor(renderer, COLOR_FRUIT);
break;
}
rect.x = j * (rect.w + GRID_PADDING);
rect.y = i * (rect.h + GRID_PADDING);
rect.x = startx + j * (rect.w + GRID_PADDING);
rect.y = starty + i * (rect.h + GRID_PADDING);
// SDL_Log("x: %f, y: %f, w: %f, h: %f", rect.x, rect.y, rect.w, rect.h);
SDL_RenderFillRect(renderer, &rect);
}