Conversion of pixel coordinates and logical coordinates

The conversion of pixel coordinates and logical coordinates requires two elements: the position of the window sitting and the size of the window

Pixel coordinates (1024*768) X: 0--1024 Y: 0--768

Logical coordinates (0--1)

 Public  Point pixeltological (point pixel)
{
  //  Viewportorigin: display the upper left corner of the image  
  Point offset  =  Viewportorigin;
  Double  Scale = viewportwidth/actualwidth;


Point logical  =    New  Point (pixel. x  *  Scale)  +  Offset. X, (pixel. Y  *  Scale)  +  Offset. y );
  Return  Logical;
}

 

On this basis, you can also convert logical coordinates and custom coordinates. The core idea is the same: to know the coordinates of the sitting cursor and the coordinates in the lower right corner, in this way, we can calculate the ratio of the coordinates directly. This is a simple solution I have come up with, but there will be deformation when processing the projection coordinates. I don't know if there are other simple solutions, yes.