Add some worldgen

1 files changed, 43 insertions, 0 deletions

diff --git a/state_mainstate/src/worldgen.c b/state_mainstate/src/worldgen.c
new file mode 100644
index 0000000..0155fc6
--- /dev/null
+++ b/state_mainstate/src/worldgen.c
@@ -0,0 +1,43 @@
+#include <stdlib.h>
+
+#include <worldgen.h>
+
+void gen_terrain(u8 *world, usize height, usize length, usize width) {
+  if (world == NULL) {
+    world = calloc(width * length * height, sizeof(u8));
+  }
+
+  // y: height
+  // z: depth/length
+  // x: width
+
+  // This is pretty cache unfriendly
+  for (usize y = 0; y < height / 2; y++) {
+    for (usize z = 0; z < length; z++) {
+      for (usize x = 0; x < width; x++) {
+        world[y * width * length
+          + z * width
+          + x] = BLOCK_grass;
+      }
+    }
+  }
+
+  for (usize y = 0; y < 4; y++) {
+    for (usize z = 0; z < 8; z++) {
+      for (usize x = 0; x < 8; x++) {
+        if (z > 0 && z < 7 && x > 0 && x < 7) continue;
+        world[((height / 2 + 1) + y) * width * length
+          + (z + (length / 2 - 4)) * width
+          + (x + (width / 2 - 4))] = BLOCK_rock;
+      }
+    }
+  }
+
+  // Doorway
+  world[(height / 2 + 1) * width * length
+    + (length / 2) * width
+    + (width / 2 - 4)] = BLOCK_none;
+  world[((height / 2 + 1) + 1) * width * length
+    + (length / 2) * width
+    + (width / 2 - 4)] = BLOCK_none;
+}