Work started on adding a level system

- Levels load from tiled CSV export
- Levels also draw

We need to add collisions with the level and adjust the level's width
and height to fit well in a 4:3 window

1 files changed, 115 insertions, 0 deletions

diff --git a/Week1-Pacman/src/map.c b/Week1-Pacman/src/map.c
new file mode 100644
index 0000000..0610fd4
--- /dev/null
+++ b/Week1-Pacman/src/map.c
@@ -0,0 +1,115 @@
+#include <stdio.h>
+#include <errno.h>
+#include <SDL2/SDL.h>
+#include <SDL2/SDL_image.h>
+#include "map.h"
+
+#define TILE_SIDE 8
+
+SDL_Texture* map_texture = NULL;
+
+void add_map_row(const char* string, int* row, int width);
+
+void load_map(const char* filename, struct map* map) {
+  if(map->contents != NULL) {
+    printf("Reallocating non empty map, exitting!\n");
+    exit(1);
+  }
+
+  FILE* file = fopen(filename, "r");
+
+  if(file == NULL) {
+    const char* error;
+
+    switch(errno) {
+    default:
+      error = "Unknown Error";
+    }
+
+    printf("Failed to load map %s, error: %s, exitting!\n",filename, error);
+    exit(1);
+  }
+
+  map->height = 0;
+  char buffer[1024];
+
+  fgets(buffer, 1024, file);
+  buffer[1023] = '\0';
+
+  map->width = 1;
+  for (unsigned long i = 0; i < strlen(buffer); i++) {
+    if (buffer[i] == ',')
+      map->width++;
+  }
+  fseek(file, 0, SEEK_SET);
+
+  while(fgets(buffer, 1024, file)) {
+    //Add another row to the map
+    map->height++;
+    map->contents =
+      realloc(map->contents, map->width * map->height * sizeof(int));
+
+    add_map_row(buffer,
+                &map->contents[map->width * (map->height - 1)],
+                map->width);
+  }
+
+  fclose(file);
+}
+
+void add_map_row(const char* line, int* row, int width) {
+  for(int i = 0; i < width; i++) {
+    sscanf(line, "%d", &row[i]);
+
+    int length = 1;
+    int j = row[i];
+
+    if(j < 0) {
+      length++;
+      j = -j;
+    }
+    for(; j > 0; j /= 10, length++);
+
+    line += length;
+  }
+}
+
+void draw_map(struct demo* demo, struct map* map) {
+
+  for(int i = 0; i < map->height; i++)
+    for(int j = 0; j < map->width; j++) {
+      int tile =
+        map->contents[i * map->width + j];
+
+      if(tile == -1) {
+        continue;
+      }
+
+      SDL_Rect s = {
+        .x = (tile % 36) * TILE_SIDE,
+        .y = (tile / 36) * TILE_SIDE,
+        .w = TILE_SIDE,
+        .h = TILE_SIDE
+      };
+
+      SDL_Rect d = {
+        .x = j * 26,
+        .y = i * 20,
+        .w = 26,
+        .h = 20
+      };
+
+      demo_rendercopy(demo, map_texture, &s, &d);
+    }
+}
+
+void map_init(struct demo* demo) {
+  map_texture =
+    IMG_LoadTexture(demo->ren, "assets/Sprites/Tileset.png");
+
+  if(map_texture == NULL) {
+    printf("Failed to load map tileset, error: %s, exitting!\n",
+           SDL_GetError());
+    exit(1);
+  }
+}