Cube which can be rotated in 3D

I've seen your videos about of matrices and I think that it's a great idea for coding challenge: create simple 3D object like cuboid in canvas which can be rorated using keyboard or buttons.

从 issue 中描述的基于 canvas 的 3D 长方体开始，并检查其中引用的矩阵材质。定义键盘和按钮控件应如何旋转对象，然后验证该长方体能够正确渲染并响应两种输入方式。

由索引模型根据 Issue 内容生成。