Re: RayShade and aspect ratio in non square windows.

[Roger H. <rog...@mi...>]

Hi Sauro and all,

First the aspect ratio bug.

In file RT.cpp in RT_SetCamera,

at the end of the routine, change the whole if statement to:

     if ( aspectRatioXToY <= 1.0 )
	 {
     	Camera.hfov = Q3Math_RadiansToDegrees ( minfov ) ;
    	Camera.vfov = Q3Math_RadiansToDegrees ( atan ( tan ( minfov *  
0.5 ) / aspectRatioXToY ) * 2.0 ) ;
    	}
    else
    	{
    	Camera.vfov = Q3Math_RadiansToDegrees ( minfov ) ;
    	Camera.hfov = Q3Math_RadiansToDegrees ( atan ( tan ( minfov *  
0.5 ) * aspectRatioXToY ) * 2.0 ) ;
    	}



The code was very nearly right but Quesa's FieldOfView is the whole  
angle from one side to the other but the original calculation assumed  
it was the angle from the centre of the view to the outside. Basically  
I just halve the input angle and then double the output value and  
cleaned the code up a tiny bit.

I will send another email later about the spot lights.

Roger.





On 17 Dec, 2008, at 17:45, Sauro Agostini wrote:

> Well done Roger. Finally these 2 old RayShade bugs are fixxed, thank  
> you.
>
> I'll try the new version asap.
>
> Sauro
>
>> I have also fixed the problem with RayShade stretching images when
>> drawn into non square windows if anyone's interested.
>>
>> Roger.
>>
>>
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