heightmap function signatures

1 files changed, 32 insertions, 5 deletions

diff --git a/src/systems/terrain.h b/src/systems/terrain.h
index 96875d9..6558202 100644
--- a/src/systems/terrain.h
+++ b/src/systems/terrain.h
@@ -1,19 +1,46 @@
 /**
  * @file terrain.h
  * @author your name (you@domain.com)
- * @brief 
+ * @brief
  * @version 0.1
  * @date 2024-04-27
- * 
+ *
  * @copyright Copyright (c) 2024
- * 
+ *
  */
 
+/*
+Future:
+ - Chunked terrain
+ - Dynamic LOD
+*/
+
+#include "cleanroom/types.h"
 #include "defines.h"
+#include "maths_types.h"
+#include "mem.h"
 
 typedef struct terrain_state {
-
 } terrain_state;
 
+typedef struct heightmap {
+  u32x2 size;
+  void* image_data;
+} heightmap;
+
 bool terrain_system_init(terrain_state* state);
-void terrain_system_shutdown(terrain_state* state);
\ No newline at end of file
+void terrain_system_shutdown(terrain_state* state);
+void terrain_system_render_hmap(renderer* rend, terrain_state* state);
+
+heightmap heightmap_from_image(const char* filepath);
+heightmap heightmap_from_perlin(/* TODO: perlin noise generation parameters */);
+
+/** @brief Get the height (the Y component) for a vertex at a particular coordinate in the heightmap
+ */
+f32 heightmap_height_at_xz(heightmap* hmap, f32 x, f32 z);
+
+/** @brief Calculate the normal vector of a vertex at a particular coordinate in the heightmap */
+vec3 heightmap_normal_at_xz(heightmap* hmap, f32 x, f32 z);
+
+/** @brief Generate the `geometry_data` for a heightmap ready to be uploaded to the GPU */
+geometry_data geo_heightmap(arena* a, heightmap heightmap);
\ No newline at end of file