Improved precision a little bit

kaczy93 · Jan 30, 2025 · 4d1f49c · 4d1f49c
1 parent 000688a
commit 4d1f49c
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Showing 4 changed files with 5 additions and 7 deletions.
diff --git a/CentrED/Map/MapManager.cs b/CentrED/Map/MapManager.cs
@@ -349,13 +349,12 @@ public Point TilePosition
             Client.InternalSetPos((ushort)value.X, (ushort)value.Y);
         }
     }
-
-    //Math.Cos(MathHelper.ToRadians(-45)), Math.Sin is negative
-    private const float RotationConst = 0.70710676573223719f;
+
+    private static readonly float RSQRT2 = (float)(1 / Math.Sqrt(2));
 
     public static Vector2 ScreenToMapCoordinates(float x, float y)
     {
-        return new Vector2(x * RotationConst - y * -RotationConst, x * -RotationConst + y * RotationConst);
+        return new Vector2(x * RSQRT2 - y * -RSQRT2, x * -RSQRT2 + y * RSQRT2);
     }
 
     public Dictionary<int, TileObject> AllTiles = new();

diff --git a/CentrED/Map/TileObject.cs b/CentrED/Map/TileObject.cs
@@ -2,9 +2,8 @@
 
 public abstract class TileObject : MapObject
 {
-    public const float TILE_SIZE = 31.11f;
+    public static readonly float TILE_SIZE = (float)(44 / Math.Sqrt(2));
     public const float TILE_Z_SCALE = 4.0f;
-    public const float INVERSE_SQRT2 = 0.70711f;
     public BaseTile Tile;
     public bool? Walkable;
 

diff --git a/CentrED/Renderer/Shaders/MapEffect.fx b/CentrED/Renderer/Shaders/MapEffect.fx
@@ -4,7 +4,7 @@
 #define LIGHT 3
 #define RGB 255
 
-static const float TileSize = 31.11;
+static const float TileSize = 44 * rsqrt(2);
 static const float3 LIGHT_DIRECTION = float3(0.0f, 1.0f, 1.0f);
 static const float Brightlight = 1.5f; //This can be parametrized, but 1.5f is default :)
 

diff --git a/CentrED/Renderer/Shaders/MapEffect.fxc b/CentrED/Renderer/Shaders/MapEffect.fxc