完成下列功能:

1.板件显示
2.板件选中状态
3.标注显示
4.相机控制.

src/DrawDimension.ts

@@ -0,0 +1,49 @@
+import { Box3, Vector3, Matrix4, Mesh } from "three";
+import { Dimension, GetBoxArr } from ".";
+
+
+/**
+ * 绘制标注实体
+ * 
+ * @export
+ * @param {Box3} box 
+ * @returns 标注实体列表
+ */
+export function DrawDimension(brList: Mesh[]): Dimension[]
+{
+    let box = GetBoxArr(brList);
+    let size = box.getSize(new Vector3());
+
+    let mat4 = new Matrix4();
+    mat4.makeBasis(
+        new Vector3(-1, 0, 0),
+        new Vector3(0, -1, 0),
+        new Vector3(0, 0, 1)
+    )
+    mat4.setPosition(box.min.clone().add(new Vector3(size.x, -30)));
+
+    let textHeight = 45;
+    let dimx = new Dimension(size.x, textHeight, true);
+    dimx.applyMatrix(mat4);
+
+    let dimz = new Dimension(size.z, textHeight);
+    mat4.makeBasis(
+        new Vector3(0, 0, -1),
+        new Vector3(1, 0, 0),
+        new Vector3(0, -1, 0)
+    )
+    mat4.setPosition(box.max.clone().add(new Vector3(30, -size.y)));
+    dimz.applyMatrix(mat4);
+
+    let dimy = new Dimension(size.y, textHeight, true, true);
+    mat4.makeBasis(
+        new Vector3(0, 1, 0),
+        new Vector3(-1, 0, 0),
+        new Vector3(0, 0, 1)
+    )
+    mat4.setPosition(box.max.clone().add(new Vector3(30, -size.y)));
+    dimy.applyMatrix(mat4);
+
+
+    return [dimx, dimy, dimz];
+}