绘制帮助类

source/src/Utils/DrawUtils.ts

@@ -0,0 +1,46 @@
+/** 各种辅助方法来辅助绘图 */
+class DrawUtils {
+    public static drawLine(shape: egret.Shape, start: Vector2, end: Vector2, color: number, thickness: number = 1){
+        this.drawLineAngle(shape, start, MathHelper.angleBetweenVectors(start, end), Vector2.distance(start, end), color, thickness);
+    }
+
+    public static drawLineAngle(shape: egret.Shape, start: Vector2, radians: number, length: number, color: number, thickness = 1){
+        shape.graphics.beginFill(color);
+        shape.graphics.drawRect(start.x, start.y, 1, 1);
+        shape.graphics.endFill();
+
+        shape.scaleX = length;
+        shape.scaleY = thickness;
+        shape.$anchorOffsetX = 0;
+        shape.$anchorOffsetY = 0;
+        shape.rotation = radians;
+    }
+
+    public static drawHollowRect(shape: egret.Shape, rect: Rectangle, color: number, thickness = 1){
+        this.drawHollowRectR(shape, rect.x, rect.y, rect.width, rect.height, color, thickness);
+    }
+
+    public static drawHollowRectR(shape: egret.Shape, x: number, y: number, width: number, height: number, color: number, thickness = 1){
+        let tl = new Vector2(x, y).round();
+        let tr = new Vector2(x + width, y).round();
+        let br = new Vector2(x + width, y + height).round();
+        let bl = new Vector2(x, y + height).round();
+
+        this.drawLine(shape, tl, tr, color, thickness);
+        this.drawLine(shape, tr, br, color, thickness);
+        this.drawLine(shape, br, bl, color, thickness);
+        this.drawLine(shape, bl, tl, color, thickness);
+    }
+
+    public static drawPixel(shape: egret.Shape, position: Vector2, color: number, size: number = 1){
+        let destRect = new Rectangle(position.x, position.y, size, size);
+        if (size != 1){
+            destRect.x -= size * 0.5;
+            destRect.y -= size * 0.5;
+        }
+
+        shape.graphics.beginFill(color);
+        shape.graphics.drawRect(destRect.x, destRect.y, destRect.width, destRect.height);
+        shape.graphics.endFill();
+    }
+}