diff --git a/core/src/com/riiablo/camera/IsometricCamera.java b/core/src/com/riiablo/camera/IsometricCamera.java
new file mode 100644
index 00000000..bf63f4cb
--- /dev/null
+++ b/core/src/com/riiablo/camera/IsometricCamera.java
@@ -0,0 +1,63 @@
+package com.riiablo.camera;
+
+import com.badlogic.gdx.math.MathUtils;
+import com.badlogic.gdx.math.Vector2;
+import com.riiablo.map.DT1.Tile;
+import com.riiablo.util.EngineUtils;
+
+public class IsometricCamera extends OrthographicCamera {
+
+  public final OrthographicCamera camera = this;
+  private final Vector2 offset = new Vector2();
+
+  public IsometricCamera() {}
+
+  public void offset(float x, float y) {
+    offset.set(x, y);
+  }
+
+  public void translate(Vector2 vec) {
+    position.add(vec.x, vec.y, 0);
+  }
+
+  public void set(Vector2 vec) {
+    set(vec.x, vec.y);
+  }
+
+  public void set(float x, float y) {
+    position.set(x, y, 0).add(offset.x, offset.y, 0);
+  }
+
+  public Vector2 toScreen(Vector2 worldCoords) {
+    return toScreen(worldCoords.x, worldCoords.y, worldCoords);
+  }
+
+  public Vector2 toScreen(float x, float y, Vector2 dst) {
+    return EngineUtils.worldToScreenCoords(x, y, dst);
+  }
+
+  public Vector2 toWorld(Vector2 screenCoords) {
+    return toWorld(screenCoords.x, screenCoords.y, screenCoords);
+  }
+
+  public Vector2 toWorld(float x, float y, Vector2 dst) {
+    x += offset.x;
+    y += offset.y;
+    //y += offset.y;
+    x /= Tile.SUBTILE_WIDTH50;
+    y /= Tile.SUBTILE_HEIGHT50;
+    dst.x = ( x - y) / 2;
+    dst.y = (-x - y) / 2;
+    return dst;
+  }
+
+  public Vector2 toTile(Vector2 worldCoords) {
+    return toTile(worldCoords.x, worldCoords.y, worldCoords);
+  }
+
+  public Vector2 toTile(float x, float y, Vector2 dst) {
+    dst.x = x < 0 ? MathUtils.floor(x) : MathUtils.floorPositive(x);
+    dst.y = y < 0 ? MathUtils.floor(y) : MathUtils.floorPositive(y);
+    return dst;
+  }
+}
diff --git a/core/src/com/riiablo/camera/OrthographicCamera.java b/core/src/com/riiablo/camera/OrthographicCamera.java
new file mode 100644
index 00000000..1dd7f5fc
--- /dev/null
+++ b/core/src/com/riiablo/camera/OrthographicCamera.java
@@ -0,0 +1,31 @@
+package com.riiablo.camera;
+
+import com.badlogic.gdx.math.Vector2;
+import com.badlogic.gdx.math.Vector3;
+
+public class OrthographicCamera extends com.badlogic.gdx.graphics.OrthographicCamera {
+
+  private final Vector3 tmpVec3 = new Vector3();
+
+  public OrthographicCamera() {}
+
+  public Vector2 project(Vector2 worldCoords) {
+    return project(worldCoords.x, worldCoords.y, worldCoords);
+  }
+
+  public Vector2 project(float x, float y, Vector2 dst) {
+    tmpVec3.set(x, y, 0);
+    project(tmpVec3);
+    return dst.set(tmpVec3.x, tmpVec3.y);
+  }
+
+  public Vector2 unproject(Vector2 screenCoords) {
+    return unproject(screenCoords.x, screenCoords.y, screenCoords);
+  }
+
+  public Vector2 unproject(float x, float y, Vector2 dst) {
+    tmpVec3.set(x, y, 0);
+    unproject(tmpVec3);
+    return dst.set(tmpVec3.x, tmpVec3.y);
+  }
+}
diff --git a/tools/src/com/riiablo/CameraTool.java b/tools/src/com/riiablo/CameraTool.java
new file mode 100644
index 00000000..f5a953ee
--- /dev/null
+++ b/tools/src/com/riiablo/CameraTool.java
@@ -0,0 +1,148 @@
+package com.riiablo;
+
+import com.badlogic.gdx.ApplicationAdapter;
+import com.badlogic.gdx.Gdx;
+import com.badlogic.gdx.InputAdapter;
+import com.badlogic.gdx.backends.lwjgl.LwjglApplication;
+import com.badlogic.gdx.backends.lwjgl.LwjglApplicationConfiguration;
+import com.badlogic.gdx.graphics.Color;
+import com.badlogic.gdx.graphics.GL20;
+import com.badlogic.gdx.graphics.g2d.Batch;
+import com.badlogic.gdx.graphics.g2d.BitmapFont;
+import com.badlogic.gdx.graphics.g2d.SpriteBatch;
+import com.badlogic.gdx.graphics.glutils.ShapeRenderer;
+import com.badlogic.gdx.math.MathUtils;
+import com.badlogic.gdx.math.Matrix4;
+import com.badlogic.gdx.math.Vector2;
+import com.riiablo.map.DT1.Tile;
+import com.riiablo.camera.IsometricCamera;
+import com.riiablo.util.DebugUtils;
+
+public class CameraTool extends ApplicationAdapter {
+  private static final String TAG = "CameraTool";
+
+  public static void main(String[] args) {
+    LwjglApplicationConfiguration config = new LwjglApplicationConfiguration();
+    config.title = TAG;
+    config.resizable = false;
+    config.width = 1280;
+    config.height = 720;
+    config.vSyncEnabled = false;
+    config.foregroundFPS = config.backgroundFPS = 144;
+    new LwjglApplication(new CameraTool(), config);
+  }
+
+  Batch batch;
+  BitmapFont font;
+  ShapeRenderer shapes;
+  IsometricCamera iso;
+  Matrix4 center = new Matrix4();
+  Matrix4 idt = new Matrix4();
+
+  @Override
+  public void create() {
+    batch = new SpriteBatch();
+    font = new BitmapFont();
+    iso = new IsometricCamera();
+    shapes = new ShapeRenderer();
+    center.set(shapes.getTransformMatrix()).translate(
+        Gdx.graphics.getWidth()  / 2,
+        Gdx.graphics.getHeight() / 2,
+        0);
+    idt.set(shapes.getProjectionMatrix());
+
+    iso.setToOrtho(false);
+    //iso.offset(0, -Tile.SUBTILE_HEIGHT50);
+    iso.set(0, 0);
+
+    Gdx.gl.glClearColor(0.3f, 0.3f, 0.3f, 1.0f);
+
+    Gdx.input.setInputProcessor(new InputAdapter() {
+      @Override
+      public boolean scrolled(int amount) {
+        iso.zoom += (amount * 0.05);
+        iso.zoom = MathUtils.clamp(iso.zoom, 0.05f, 2f);
+        return super.scrolled(amount);
+      }
+    });
+  }
+
+  final Vector2 vec2 = new Vector2();
+
+  @Override
+  public void render() {
+    Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
+
+    iso.update();
+
+    shapes.setTransformMatrix(center);
+    shapes.setProjectionMatrix(idt);
+    shapes.begin(ShapeRenderer.ShapeType.Line); {
+      shapes.setColor(Color.GREEN);
+      shapes.line(-Gdx.graphics.getWidth() / 2, 0, Gdx.graphics.getWidth() / 2, 0);
+      shapes.line(0, -Gdx.graphics.getHeight() / 2, 0, Gdx.graphics.getHeight() / 2);
+
+//      shapes.setColor(Color.BLUE);
+//      shapes.rect(-80, -40, 160, 80);
+    } shapes.end();
+
+    shapes.identity();
+    shapes.setProjectionMatrix(iso.combined);
+    shapes.begin(ShapeRenderer.ShapeType.Line); {
+      shapes.setColor(Color.RED);
+      shapes.line(0, 0, 8, 0);
+      shapes.line(0, 0, 0, 8);
+
+      shapes.setColor(Color.WHITE);
+      for (int x = -160; x < 160; x += 32) {
+        for (int y = -80; y <= 80; y += 16) {
+          shapes.line(x, y, x + 32, y + 16);
+          shapes.line(x, y + 16, x + 32, y);
+        }
+      }
+
+      shapes.setColor(Color.BLUE);
+      shapes.line(-320, 160, 320, -160);
+      shapes.line(-320, -160, 320, 160);
+    } shapes.end();
+
+//    vec2.set(
+//        Gdx.input.getX() - Gdx.graphics.getWidth()  / 2,
+//        Gdx.graphics.getHeight() / 2 - Gdx.input.getY());
+//    iso.toWorld(vec2);
+//    System.out.println(vec2);
+//    vec2.x = (int) vec2.x;
+//    vec2.y = (int) vec2.y;
+//    System.out.println(vec2);
+//    vec2.set(Gdx.input.getX(), Gdx.input.getY());
+//    iso.unproject(vec2);
+//    System.out.println(vec2);
+
+    shapes.begin(ShapeRenderer.ShapeType.Line); {
+      vec2.set(Gdx.input.getX(), Gdx.input.getY());
+      iso.unproject(vec2);
+      iso.toWorld(vec2);
+      iso.toTile(vec2);
+      iso.toScreen(vec2);
+
+      shapes.setColor(Color.SALMON);
+      DebugUtils.drawDiamond(shapes, vec2.x, vec2.y - Tile.SUBTILE_HEIGHT50, Tile.SUBTILE_WIDTH, Tile.SUBTILE_HEIGHT);
+
+      shapes.setColor(Color.GREEN);
+      shapes.point(vec2.x, vec2.y, 0);
+    } shapes.end();
+
+    batch.begin();
+    StringBuilder builder = new StringBuilder()
+        .append(vec2);
+    font.draw(batch, builder.toString(), 0, Gdx.graphics.getHeight());
+    batch.end();
+  }
+
+  @Override
+  public void dispose() {
+    font.dispose();
+    batch.dispose();
+    shapes.dispose();
+  }
+}