1 files changed, 108 insertions, 66 deletions

diff --git a/src/map.c b/src/map.c
index 3b763f0..33e57bc 100644
--- a/src/map.c
+++ b/src/map.c
@@ -1,112 +1,148 @@
 #include "map.h"
 #include "game.h"
 #include "world.h"
+#include "player.h"
 
 void repositionMap(Map* map)
 {
   map->rect.x = GetRenderWidth() - map->rect.width;
 }
 
-void zoomMap(Map* map, float zoom)
+void initMapHeightmap(Map* map, const World* world)
 {
-  map->zoom = zoom;
-  map->heightmapRect.width = WORLD_IMAGE_WIDTH / zoom;
-  map->heightmapRect.height = WORLD_IMAGE_HEIGHT / zoom;
+  Image image = LoadImageFromTexture(world->heightmapTexture);
+  Color* colors = LoadImageColors(image);
+  UnloadImage(image);
+
+  for (int index = 0; index < WORLD_IMAGE_WIDTH * WORLD_IMAGE_HEIGHT; ++index)
+  {
+    unsigned char grayValue = GRAY_VALUE(colors[index]);
+    unsigned char alpha = colors[index].a;
+
+    if (grayValue >= 170)
+    {
+      colors[index] = (Color){grayValue, 0, 0, alpha};
+    }
+    else if (grayValue >= 85)
+    {
+      colors[index] = (Color){0, grayValue * 2, grayValue, alpha};
+    }
+    else
+    {
+      colors[index] = (Color){grayValue, 0, grayValue, alpha};
+    }
+  }
+
+  image = (Image){
+    .data = colors,
+    .width = WORLD_IMAGE_WIDTH,
+    .height = WORLD_IMAGE_HEIGHT,
+    .format = PIXELFORMAT_UNCOMPRESSED_R8G8B8A8,
+    .mipmaps = 1
+  };
+
+  ImageColorContrast(&image, 25.0);
+  
+  map->heightmap = LoadTextureFromImage(image);
+  UnloadImage(image);
 }
 
-void initMap(Map* map, const Settings* settings)
+void initMap(Map* map, const World* world, const Settings* settings)
 {
   *map = (Map){
     .rect = (Rectangle){0.0, 0.0, settings->mapPreviewWidth,
                         settings->mapPreviewHeight},
-    .isEnabled = settings->isMapPreviewEnabledDefault,
-    .isFullSize = false,
+    .render = LoadRenderTexture(settings->mapPreviewWidth,
+                                settings->mapPreviewHeight),
+    .camera = (Camera2D){
+      .offset = (Vector2){settings->mapPreviewWidth / 2.0,
+                          settings->mapPreviewHeight / 2.0},
+      .target = Vector2Zero(),
+      .rotation = 0.0,
+      .zoom = settings->mapPreviewZoomDefault
+    },
     .playerPosition = Vector2Zero(),
-    .playerRotation = 0.0
+    .isEnabled = settings->isMapPreviewEnabledDefault,
+    .isFullSize = false
   };
 
-  zoomMap(map, settings->mapPreviewZoomDefault);
+  initMapHeightmap(map, world);
   repositionMap(map);
 }
 
-void updateMapPreview(Map* map, Game* game)
+void drawMapPlayer(Map* map, Player* player, Vector2 position,
+                   float width, float height)
 {
-  const Settings* settings = &game->settings;
-  const World* world = &game->world;
-
-  float mouseWheel = GetMouseWheelMove();
+  Vector2 playerPreview[3] = {
+    (Vector2){0.0, height},
+    (Vector2){width, -height},
+    (Vector2){-width, -height}
+  };
 
-  if (mouseWheel != 0.0)
+  // Move player to position.
+  for (int index = 0; index < 3; ++index)
   {
-    zoomMap(map, Clamp(map->zoom + mouseWheel, MAP_ZOOM_MIN, MAP_ZOOM_MAX));
+    playerPreview[index] = Vector2Rotate(playerPreview[index],
+                                         player->cameraAngle.x);
+    playerPreview[index] = Vector2Add(playerPreview[index], position);
   }
 
+  // Draw triangles.
+  DrawTriangle(playerPreview[0], playerPreview[1], playerPreview[2], BLACK);
+  DrawTriangleLines(playerPreview[0], playerPreview[1], playerPreview[2],
+                    WHITE);
+}
+
+void updateMapPreview(Map* map, Game* game)
+{
+  const Settings* settings = &game->settings;
+  const World* world = &game->world;
+
   // Player position.
   map->playerPosition = (Vector2){
     WORLD_IMAGE_WIDTH / world->size.x * game->player.position.x,
     WORLD_IMAGE_HEIGHT / world->size.z * game->player.position.z
   };
 
-  Vector2 playerPreviewPosition = Vector2Add(
-    (Vector2){map->rect.x, map->rect.y},
-    (Vector2){map->rect.width / 2.0, map->rect.height / 2.0});
+  // Zoom.
+  float mouseScroll = GetMouseWheelMove();
 
-  map->heightmapRect.x = map->playerPosition.x -
-    (map->heightmapRect.width / 2.0);
-  map->heightmapRect.y = map->playerPosition.y -
-    (map->heightmapRect.height / 2.0);
-
-  // Preview out of bounds.
-  bool outOfX = false;
-  bool outOfY = false;
-  float oldX = map->heightmapRect.x;
-  float oldY = map->heightmapRect.y;
-  
-  if (map->heightmapRect.x + map->heightmapRect.width > WORLD_IMAGE_WIDTH)
-  {
-    map->heightmapRect.x = WORLD_IMAGE_WIDTH - map->heightmapRect.width;
-    outOfX = true;
-  }
-  else if (map->heightmapRect.x < 0.0)
+  if (mouseScroll != 0.0)
   {
-    map->heightmapRect.x = 0.0;
-    outOfX = true;
-  }
-  
-  if (map->heightmapRect.y + map->heightmapRect.height > WORLD_IMAGE_HEIGHT)
-  {
-    map->heightmapRect.y = WORLD_IMAGE_HEIGHT - map->heightmapRect.height;
-    outOfY = true;
-  }
-  else if (map->heightmapRect.y < 0.0)
-  {
-    map->heightmapRect.y = 0.0;
-    outOfY = true;
+    map->camera.zoom = expf(logf(map->camera.zoom) +
+                            ((float)GetMouseWheelMove() * 0.1f));
+    map->camera.zoom = Clamp(map->camera.zoom, MAP_ZOOM_MIN, MAP_ZOOM_MAX);
   }
 
-  if (outOfX)
-  {
-    playerPreviewPosition.x += (oldX - map->heightmapRect.x) *
-      (map->rect.width / map->heightmapRect.width);
-  }
-  if (outOfY)
-  {
-    playerPreviewPosition.y += (oldY - map->heightmapRect.y) *
-      (map->rect.height / map->heightmapRect.height);
-  }
+  // Camera follow player.
+  map->camera.target = map->playerPosition;
+
+  // Draw map scene.
+  BeginTextureMode(map->render);
+  BeginMode2D(map->camera);
+  ClearBackground(BLANK);
+
+  // Draw height map.
+  DrawTexture(map->heightmap, 0.0, 0.0,
+              (Color){255, 255, 255, settings->mapAlpha});
+
+  EndMode2D();
+  EndTextureMode();
 
-  // Draw map.
-  DrawTexturePro(world->heightmapTexture,
-                 map->heightmapRect,
+  // Draw render texture.
+  DrawTexturePro(map->render.texture,
+                 (Rectangle){0.0, 0.0, map->render.texture.width,
+                             -map->render.texture.height},
                  map->rect,
                  (Vector2){0.0, 0.0},
                  0.0,
-                 settings->mapColor);
+                 WHITE);
 
   // Draw player.
-  DrawCircleV(playerPreviewPosition, 3.0, BLUE);
-
-  // Outline.
+  Vector2 mapCenter = (Vector2){map->rect.x + (map->rect.width / 2.0),
+                                map->rect.y + (map->rect.height / 2.0)};
+  drawMapPlayer(map, &game->player, mapCenter, 3.0, 6.0);
+  
   DrawRectangleLinesEx(map->rect, 3.0, BLUE);
 }
 
@@ -133,3 +169,9 @@ void updateMap(Map* map, Game* game)
 
   updateMapPreview(map, game);
 }
+
+void closeMap(Map* map)
+{
+  UnloadRenderTexture(map->render);
+  UnloadTexture(map->heightmap);
+}