Re: Rayshade render

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

It looks like Red has gone to Alpha, green has gone to Red, Blue has  
gone to green and Alpha has gone to Blue.


Try this:

pixel. fourChars [ 3 ] = correct ( rgbaPixels [ i ] [ 3 ] ) ;
pixel. fourChars [ 0 ] = correct ( rgbaPixels [ i ] [ 2 ] ) ;
pixel. fourChars [ 1 ] = correct ( rgbaPixels [ i ] [ 1 ] ) ;
pixel. fourChars [ 2 ] = correct ( rgbaPixels [ i ]  [0 ] ) ;

and if that doesn't work it must be:


pixel. fourChars [ 1 ] = correct ( rgbaPixels [ i ] [ 3 ] ) ;
pixel. fourChars [ 2 ] = correct ( rgbaPixels [ i ] [ 2 ] ) ;
pixel. fourChars [ 3 ] = correct ( rgbaPixels [ i ] [ 1 ] ) ;
pixel. fourChars [ 0 ] = correct ( rgbaPixels [ i ]  [0 ] ) ;

Roger.


On 14 Mar, 2008, at 11:26, Daniele Cavallini wrote:

> I tried to implement this solution but it don't work well.
> (I set anUnsignedInt like TQ3Uns32 )
> The create colors aren't correct.
> You can see
> As it would have to be
> http://www.interstudio.net/quesa/init.jpg
> as it is
> http://www.interstudio.net/quesa/res.jpg
> I use imac intel.
>
> I don't know why  doesn't work.
> It isn't a good solution to use #define /QUESA_HOST_IS_BIG_ENDIAN
> /because there are mac with  intel and powerpc processor.
> How I know  in runtime if computer have an intel or powerpc processor?
>
>
> Have you Some ideas?
> //
> Roger Holmes ha scritto:
>> On the other hand, if we define
>>
>> union longAndFourChars
>> 	{
>> 	char fourChars [ 4 ] ;
>> 	unsigned long int anUnsignedInt ;
>> 	}
>>
>> longAndFourChars  pixel ;
>>
>> then
>> 	
>> pixel. fourChars [ 0 ] = correct ( rgbaPixels [ i ] [ 3 ] ) ;// Alpha
>> pixel. fourChars [ 1 ] = correct ( rgbaPixels [ i ] [ 2 ] ) ;
>> pixel. fourChars [ 2 ] = correct ( rgbaPixels [ i ] [ 1 ] ) ;
>> pixel. fourChars [ 3 ] = correct ( rgbaPixels [ i ]  [0 ] ) ;
>>
>> * ( ( unsigned int* ) rowAddr ) = pixel. anUnsignedInt ;
>>
>>
>>
>> Then won't that work on either endian machine?
>>
>> Roger.
>>
>>
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