[Bf-committers] Camera, displacement and normals

[Ton Roosendaal]

Hi,

This is what panorama render was meant for. You can set any lens, Xsize =20=

(pixels per part), and Xparts for that. But whether the problem for =20
displacement mapping will solve you'll have to check.
If it doesn't we just have a bug. I can't think of a reason why it =20
should not work.

Another report here (glass + displacement) shows that there's still an =20=

issue to work at.

-Ton-



On Tuesday, Jan 20, 2004, at 15:41 Europe/Amsterdam, Gregor M=FCckl =
wrote:

> Am Tuesday 20 January 2004 15:38 schrieb Gregor M=FCckl:
>> Hi!
>>
>> I'm currently in the process of building a game engine which allows =20=

>> the
>> player to look at panoramas, with viewing angles of 180 degrees in =
the
>> vertical direction and 360 degrees in the horizontal direction.
>>
>> I am able to render these panoramas within blender with a small =20
>> trick: I
>> use a camera fov of 90 degrees and render 6 images - two along each
>> coordinate axis - and project them onto a cube which is rendered in
>> realtime. This method works quite good.
>>
>> Obviously, the rendered images must fit together seamlessly to create =
=20
>> this
>> illusion. However, I discovered, that when mapping texture output =20
>> onto the
>> displacement or normal of a material, the images won't fit as =20
>> expected.
>> This is quite disappointing because of this these features aren't =20
>> available
>> to the artists working on this game.
>>
>> Why is this? Does blender's renderer use the camera front vector =20
>> instead of
>> the ray direction for this? With a field of view of 90 degrees the =20=

>> angle
>> between these gets to 45 degrees at the edge centers and even greater =
=20
>> than
>> this at the corners of the image. This would explain the effects I'm
>> seeing.
>>
>> Is there a reason for doing it the way it is done right now? Would it =
=20
>> be a
>> big deal to alter this behaviour?
>>
>> Regards,
>> Gregor
>
> I'm sorry to reply to my own email, but I've just had another thought =20=

> on this:
> What about blender's panorama rendering option? Would the same problem =
=20
> arise
> there if xparts and yparts are not chosen large enough?
>
> Regards,
> Gregor
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------------------------------------------------------------------------=20=

--
Ton Roosendaal  Blender Foundation ton@blender.org =20
http://www.blender.org