Le 26/09/2018 à 08:52, Mike Horvath a écrit :
> Oops, here are the files once again. (Ignore the previous ones.)
> 
> 
> Mike

I added the tilting axis (yellow) of the planet and the relevant
transformation.

I do not touch obliquity.

#declare TILT_AXIS = vrotate( x, (90+alpha_0)*z );
/* same as
#declare TILT_AXIS = vrotate( y, alpha_0*z );
*/
#include "transforms.inc"

#declare sphere_trans = transform
{
	rotate z * W
  Axis_Rotate_Trans( TILT_AXIS, 90-delta_0 )
	//rotate x * (90-delta_0)
	//rotate z * (90+alpha_0)
	rotate x * -obliquity
}

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