trig.vfl

gistfile1.txt

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 )