几何变换
In this chapter all Cartesian coordinate systems are right-handed, and the vertical axis is always the y-axis
1. 齐次坐标--Homogeneous Coordinates
This means that the point (x, y) has homogeneous coordinates (x, y, 1) making scaling superfluous
2. 二维变换
1) 平移--Translation
2) 缩放--Scaling
3) 镜像--Reflection
4) 斜切--2D Shearing
5) 旋转--2D Rotation
2. 三维变换
1) 平移--Translation
2) 缩放--Scaling
3) 旋转--3D Rotation
• roll is the angle of rotation about the z-axis,
• pitch is the angle of rotation about the x-axis,
• yaw is the angle of rotation about the y-axis.
4) 镜像--3D Reflections