Computer Graphics learning notes

When creating a window drawing in it, you must also specify the coordinate system to be used and how to map the prepared coordinates to pixels (x * Y) on the physical screen ).

 

The window is measured physically by the number of records. Before painting, you must specify "how to convert a specified coordinate pair to screen coordinates, specify the trim area first (specify the area occupied by the window in the Cartesian coordinate system ).

 

1. in two-dimensional space, the trim area is the largest and smallest x and y values in the window.

2. Specify the position of the origin to the window.

 

The default ing of Windows is to increase the value of Y at the bottom of the window from the top of the window.

Computer Graphics learning notes