Basic drawing

_images/shape1.PNG

1.Convex polygon

The loop of vertices is anticlockwise

_images/local_coordinates.PNG

Some examples

_images/shape1.PNG _images/shape2.PNG _images/shape4.PNG _images/shape5.PNG

2.Hollow four-sided polygon

_images/shape3.PNG _images/shape3ex.PNG

3.Transformation to 3D space

With the transformation, we can set up a model.

_images/shapes_rotation.png

Transformation matrix

_images/matrix.PNG _images/global_coordinates.PNG