From a5b8ea449bbb6fe30a6bf27843eab1df6a21ccef Mon Sep 17 00:00:00 2001
From: nathan <nathansmith@disroot.org>
Date: Fri, 4 Jul 2025 08:06:42 -0600
Subject: Started getting walking on heightmap working

---
 src/assets.h   |  4 ++--
 src/game.c     |  4 ++++
 src/game.h     |  8 +++++---
 src/player.c   | 22 ++++++++++++++++++++++
 src/player.h   |  2 +-
 src/settings.h |  3 ++-
 src/utils.c    |  1 +
 src/utils.h    |  4 ++++
 8 files changed, 41 insertions(+), 7 deletions(-)

(limited to 'src')

diff --git a/src/assets.h b/src/assets.h
index c5fb7ac..43c4b43 100644
--- a/src/assets.h
+++ b/src/assets.h
@@ -9,7 +9,7 @@
 extern const char imageAssetPaths[IMAGE_ASSET_COUNT][FT_NAMEMAX];
 extern const char textureAssetPaths[TEXTURE_ASSET_COUNT][FT_NAMEMAX];
 
-typedef int8_t Assetid;
+typedef int8_t AssetId;
 
 // Image asset ids.
 enum {
@@ -21,7 +21,7 @@ enum {
   HEIGHT_MAP_TEXTURE
 };
 
-typedef struct Assets {
+typedef struct {
   Image images[IMAGE_ASSET_COUNT];
   Texture textures[TEXTURE_ASSET_COUNT];
 } Assets;
diff --git a/src/game.c b/src/game.c
index 778d05e..15e54e5 100644
--- a/src/game.c
+++ b/src/game.c
@@ -27,6 +27,9 @@ void initGame(Game* game)
   game->heightmap.materials[0].maps[MATERIAL_MAP_DIFFUSE].texture =
     game->assets.textures[HEIGHT_MAP_TEXTURE];
 
+  game->heightmapColors = LoadImageColors(
+    game->assets.images[HEIGHT_MAP_IMAGE]);
+
   DisableCursor();
 }
 
@@ -73,5 +76,6 @@ void closeGame(Game* game)
 {
   closeAssets(&game->assets);
   UnloadModel(game->heightmap);
+  UnloadImageColors(game->heightmapColors);
   CloseWindow();
 }
diff --git a/src/game.h b/src/game.h
index f25c97f..8c9969a 100644
--- a/src/game.h
+++ b/src/game.h
@@ -6,18 +6,20 @@
 #ifndef GAME_H
 #define GAME_H
 
-typedef enum SceneID {
+typedef enum {
   MAIN_MENU_SCENE,
   GAME_SCENE
 } SceneID;
 
-typedef struct Game {
+struct Game {
   SceneID sceneId;
   Settings settings;
   Assets assets;
   Player player;
+  
   Model heightmap;
-} Game;
+  Color* heightmapColors;
+};
 
 void initGame(Game* game);
 void updateGame(Game* game);
diff --git a/src/player.c b/src/player.c
index ec6eaf2..880aa34 100644
--- a/src/player.c
+++ b/src/player.c
@@ -18,6 +18,26 @@ Player createPlayer()
   };
 }
 
+// TODO: subpixel hackery
+void readoutMapHeight(Player* player, Game* game)
+{
+  Vector3 position = player->position;
+  Image* map = &game->assets.images[HEIGHT_MAP_IMAGE];
+
+  // Map player position to height map pixel.
+  int pixelX = (int)roundf(position.x) * (map->width / 100);
+  int pixelY = (int)roundf(position.z) * (map->height / 100);
+  pixelX = Clamp(pixelX, 0, map->width);
+  pixelY = Clamp(pixelY, 0, map->height);
+
+  Color color = game->heightmapColors[pixelY * map->width + pixelX];
+  float height = Vector3Length((Vector3){color.r, color.g, color.b})
+    * (30.0 / 255.0) - 15.0;
+
+  printf("%f\n", height);
+  player->position.y = height + 1.0;
+}
+
 // TODO: move magic numbers to settings
 void updatePlayer(Player* player, Game* game)
 {
@@ -72,4 +92,6 @@ void updatePlayer(Player* player, Game* game)
   // Apply camera.
   camera->position = player->position;
   camera->target = Vector3Add(player->position, player->direction);
+
+  readoutMapHeight(player, game);
 }
diff --git a/src/player.h b/src/player.h
index 4983752..bc061f8 100644
--- a/src/player.h
+++ b/src/player.h
@@ -3,7 +3,7 @@
 #ifndef PLAYER_H
 #define PLAYER_H
 
-typedef struct Player {
+typedef struct {
   Vector3 position;
   Vector3 direction;
   Vector3 velocity;
diff --git a/src/settings.h b/src/settings.h
index 3576955..da67539 100644
--- a/src/settings.h
+++ b/src/settings.h
@@ -3,7 +3,7 @@
 #ifndef SETTINGS_H
 #define SETTINGS_H
 
-typedef struct Settings {
+typedef struct {
   // Window.
   int windowWidth;
   int windowHeight;
@@ -17,5 +17,6 @@ typedef struct Settings {
 } Settings;
 
 Settings defaultSettings();
+// Bite my shiny metal ass!
 
 #endif
diff --git a/src/utils.c b/src/utils.c
index 2916c30..635a1f7 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -1,2 +1,3 @@
 #include "utils.h"
 
+// Why does the universe feel strange to exist in?
diff --git a/src/utils.h b/src/utils.h
index e289189..db6f7a8 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -38,4 +38,8 @@ typedef enum FTError {
 #define TOGGLE_BIT(b, n) (b ^ (0x1 << n))
 #define HAS_FLAG(v, f) ((v & f) == f)
 
+// Helpful for debugging
+#define PRINT_VECTOR2(v) printf("%f %f\n", v.x, v.y)
+#define PRINT_VECTOR3(v) printf("%f %f %f\n", v.x, v.y, v.z)
+
 #endif
-- 
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