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@RH2
Created May 7, 2022 04:46
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trig.vfl
float fovx; //field of view in X -
float fovy; //field of view in Y -
float aperature_x; //aperture in X 41.4214
float aperature_y; //aperture in Y -
float focal; //focal length 50
float resx; //pixel resolution in X 320
float resy; //pixel resolution in Y 243
float pixel_aspect; //pixel aspect (width/height)
//custom declarations
fovx = @f;
fovy = 0;
aperature_x = 1;
aperature_y = 1;
focal length = 1;
resx = @dimx;
resy = @dimy;
pixel_aspect = resx/resy;
fovx = 2 * atan( (aperature_x/2) / focal )
//tan(fovy/2) = (aperature_y/2) / focal
aperature_x/aperature_y = (resx * pixel_aspect) / resy
aperature_y = (resy*aperature_x) / (resx*pixel_aspect)
fovy = 2*atan( (aperature_y/2) / focal )
fovx = 2*atan( ( aperature_x / 2 ) / focal )
aperature_y = (resy * aperature_x) / (resx * pixel_aspect)
fovy = 2*atan( (aperature_y/2) / focal )
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