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

image

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

image


image



2) 缩放--Scaling

image



image


image



3) 镜像--Reflection

image


image


image


4) 斜切--2D Shearing

image


image



5) 旋转--2D Rotation


image


image


image


image


2. 三维变换

1) 平移--Translation


image


2) 缩放--Scaling


image


3) 旋转--3D Rotation

image


image



image

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.

image


image




image


4) 镜像--3D Reflections

image

posted @ 2022-05-11 19:16  ParamousGIS  阅读(143)  评论(0编辑  收藏  举报