inputdata xyx -> mapping -> screen

OpenGL OpenGL: Basic Coding
1

Hi first of all let me tell you what we have today:
We get input-data for a grid for instance 100x100 points…

These grids have extreme-values max/min - x,y,z…

In some cases these values will be from 0-100 but in other cases from 53000 to 64000…(or other extreme-values).

Today we have a mapping-util that takes the original value and returns a value between 0-> screen-width and 0-screen-height, so that no matter how big the grid is it will fit perfectly on to the screen. This operation is done during init of the rendering…

Is there a smart way of making the camera do this? So that the camera will fit the grid perfectly to the screen…
We use glOrtho for viewing…

2

What about this :

  • when loading file, scan for min/max values on x,y,z
  • when displaying, use glOrtho(minx,maxx,miny,maxy,minz,maxz);
3

Thanks, i’ll try it out :slight_smile: