[PD] Extended view toolkit: texture coordinate

[Husk 00]

On Thu, Jul 4, 2013 at 11:52 AM, Peter Venus <news at petervenus.de> wrote:

>
>
> Am 04.07.13 11:47, schrieb Husk 00:
>
>> Hi Peter and list,
>>
>
> Hi Husk
>
>
>  I finally had time to explore extended view  toolkit and it's
>> really working well...congratulations!
>> There is something still I miss: how the texture coordinates works.
>> What units do
>> they uses?
>>
> The units used for texture-coordinates are pixel.
> As you can see in the example you mentioned, all 3 projection modules get
> their texture information via the (texture id)-outlet from the
> framebuffer-abstraction.
> Now, the framebuffer愀 size is given in pixel, here 1024 by 1024, so if you
> want a projection-module dispplay the whole framebuffer, its
> texture-coordinates should range from 0 to 1024 to display the whole
> content of the framebuffer.
> If you now introduce a second projection-module and you want both
> displaying a portion of the framebuffer, say, one should display the left
> half, the other the right half of the whole framebuffer,
> you have to set the texture-coordinates ranging from 0 to 512(x) for the
> left half, and to 512 to 1024 for the right half of the framebuffer.
> I hope this makes sense to you.
>
>
Yes, this makes sense to me. I will try that.
thanks
husk




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