1 files changed, 56 insertions, 17 deletions

diff --git a/src/client/util/Transform.ts b/src/client/util/Transform.ts
index e9170ec36..dca37c960 100644
--- a/src/client/util/Transform.ts
+++ b/src/client/util/Transform.ts
@@ -2,65 +2,105 @@ export class Transform {
     private _translateX: number = 0;
     private _translateY: number = 0;
     private _scale: number = 1;
+    private _rotate: number = 0;
 
     static Identity(): Transform {
         return new Transform(0, 0, 1);
     }
 
-    get TranslateX(): number { return this._translateX; }
-    get TranslateY(): number { return this._translateY; }
-    get Scale(): number { return this._scale; }
+    get TranslateX(): number {
+        return this._translateX;
+    }
+    get TranslateY(): number {
+        return this._translateY;
+    }
+    get Scale(): number {
+        return this._scale;
+    }
+    get Rotate(): number {
+        return this._rotate;
+    }
+    get RotateDeg(): number {
+        return (this._rotate * 180) / Math.PI;
+    }
 
-    constructor(x: number, y: number, scale: number) {
+    /**
+     * Represents a transformation/scale matrix (can contain a rotation value, but it is not used when transforming points)
+     * @param x
+     * @param y
+     * @param scale
+     * @param rotation NOTE: this is passed along but is NOT used by any of the transformation functionsStores
+     */
+    constructor(x: number, y: number, scale: number, rotationRadians?: number) {
         this._translateX = x;
         this._translateY = y;
         this._scale = scale;
+        this._rotate = rotationRadians ?? 0;
     }
 
+    /**
+     * Rotate in radians
+     * @param rot
+     * @returns the modified transformation
+     */
+    rotate = (rot: number): this => {
+        this._rotate += rot;
+        return this;
+    };
+    /**
+     * Rotation in degrees
+     * @param rot
+     * @returns the modified transformation
+     */
+    rotateDeg = (rot: number): this => {
+        this._rotate += (rot * Math.PI) / 180;
+        return this;
+    };
+
     translate = (x: number, y: number): this => {
         this._translateX += x;
         this._translateY += y;
         return this;
-    }
+    };
 
     scale = (scale: number): this => {
         this._scale *= scale;
         this._translateX *= scale;
         this._translateY *= scale;
         return this;
-    }
+    };
 
     scaleAbout = (scale: number, x: number, y: number): this => {
         this._translateX += x * this._scale - x * this._scale * scale;
         this._translateY += y * this._scale - y * this._scale * scale;
         this._scale *= scale;
         return this;
-    }
+    };
 
     transform = (transform: Transform): this => {
         this._translateX = transform._translateX + transform._scale * this._translateX;
         this._translateY = transform._translateY + transform._scale * this._translateY;
         this._scale *= transform._scale;
         return this;
-    }
+    };
 
     preTranslate = (x: number, y: number): this => {
         this._translateX += this._scale * x;
         this._translateY += this._scale * y;
         return this;
-    }
+    };
 
     preScale = (scale: number): this => {
         this._scale *= scale;
         return this;
-    }
+    };
 
     preTransform = (transform: Transform): this => {
         this._translateX += transform._translateX * this._scale;
         this._translateY += transform._translateY * this._scale;
         this._scale *= transform._scale;
         return this;
-    }
+    };
 
     translated = (x: number, y: number): Transform => this.copy().translate(x, y);
 
@@ -82,18 +122,17 @@ export class Transform {
         y *= this._scale;
         y += this._translateY;
         return [x, y];
-    }
+    };
 
     transformDirection = (x: number, y: number): [number, number] => [x * this._scale, y * this._scale];
 
-    transformBounds(x: number, y: number, width: number, height: number): { x: number, y: number, width: number, height: number } {
+    transformBounds(x: number, y: number, width: number, height: number): { x: number; y: number; width: number; height: number } {
         [x, y] = this.transformPoint(x, y);
         [width, height] = this.transformDirection(width, height);
         return { x, y, width, height };
     }
 
-    inverse = () => new Transform(-this._translateX / this._scale, -this._translateY / this._scale, 1 / this._scale);
-
-    copy = () => new Transform(this._translateX, this._translateY, this._scale);
+    inverse = () => new Transform(-this._translateX / this._scale, -this._translateY / this._scale, 1 / this._scale, -this._rotate);
 
-}
\ No newline at end of file
+    copy = () => new Transform(this._translateX, this._translateY, this._scale, this._rotate);
+}