add missing src2/kiri

src2/kiri/boxes.js

@@ -0,0 +1,44 @@
+const { BoxGeometry, Matrix4, MeshPhongMaterial, Quaternion, Vector3 } = THREE;
+const boxes = [];
+
+export function delbox(name) {
+    const old = boxes[name];
+    if (old) {
+        old.groupTo.remove(old);
+    }
+}
+
+export function addbox(point, color, name, dim = {x:1,y:1,z:1,rz:0}, opt = {}) {
+    delbox(name);
+
+    const box = boxes[name] = new Mesh(
+        new BoxGeometry(dim.x, dim.y, dim.z),
+        new MeshPhongMaterial({
+            transparent: true,
+            opacity: opt.opacity || 0.5,
+            color
+        })
+    );
+
+    box.position.x = point.x;
+    box.position.y = point.y;
+    box.position.z = point.z;
+
+    lastBox = { point, dim };
+
+    const group = opt.group || space.scene
+    group.add(box);
+    box.groupTo = group;
+
+    if (dim.rz) {
+        opt.rotate = new Quaternion().setFromAxisAngle(new Vector3(0,0,1), dim.rz);
+    }
+    if (opt.rotate) {
+        opt.matrix = new Matrix4().makeRotationFromQuaternion(opt.rotate);
+    }
+    if (opt.matrix) {
+        box.geometry.applyMatrix4(opt.matrix);
+    }
+
+    return box;
+}