[x3d-public] COBWEB IMPLEMENTS DYNAMIC SHADOWS

[Holger Seelig]

 > Good to see that your default shadowIntensity  is 0, keeping the
 > rendering of legacy content the same by default.

There is no need to say that shadowIntensity must be zero, to get the 
standard light behaviour for a default light node.



 > Wondering if shadowMapSize is essentially a player setting that perhaps
 > doesn't need to be exposed to model authors?

The shadow map is an essential element to render shadows. The shadow 
quality depends on the size of the shadow map. X3D Authors can control 
with the shadow map size this value. Smaller scenes require a smaller 
shadowMapSize and larger scenes require a larger shadowMapSize. It is 
the responsibility of the X3D author to set the desired value to give 
him control over the shadow quality.

The shadowMapSize field is just a initializeOnly field as I figured out 
that this can provide browsers a way to optimize the shadow map creation.


Holger



Am 16.09.2016 um 22:56 schrieb Don Brutzman:
> Holger, congratulations on such wonderful progress!   8)
>
> The X3D Working Group indeed lists shadows on the set of capabilities
> desired for X3D v4.
>
>     X3D version 4.0 Development
>     http://www.web3d.org/wiki/index.php/X3D_version_4.0_Development
>
> We look forward to learning more about how you have accomplished this
> capability, how it might utilize WebGL or other renderers, and how it
> might be similarly implemented in other players.
>
> Good to see that your default shadowIntensity  is 0, keeping the
> rendering of legacy content the same by default.
>
> Wondering if shadowMapSize is essentially a player setting that perhaps
> doesn't need to be exposed to model authors?
>
>
> On 9/16/2016 11:10 AM, Holger Seelig wrote:
>> *** COBWEB IMPLEMENTS DYNAMIC SHADOWS ***
>>
>> With its new and up to date version 1.28, Cobweb implements dynamic
>> shadows now.
>>
>> THIS IS AN EXPERIMENTAL FEATURE!
>>
>> For a live demonstration have a look at:
>> http://titania.create3000.de/cobweb/dynamic-shadows/
>>
>> Cobweb adds four important fields to every light node.
>>
>> X3DLightNode : X3DChildNode {
>>  ...
>>  SFColor [in,out] shadowColor      0 0 0  [0,1]
>>  SFFloat [in,out] shadowIntensity  0      [0,1]
>>  SFFloat [in,out] shadowDiffusion  0      [0,inf)
>>  SFInt32 []       shadowMapSize    1024   (-inf,inf)
>> }
>>
>> All light sources contain an shadowIntensity, a shadowColor, a
>> shadowDiffusion, and a shadowMapSize field.  The shadowIntensity field
>> specifies the darkness of the shadow.  Shadow intensity may range from
>> 0.0 (no shadow) to 1.0 (full intensity).  The shadowColor field
>> specifies the spectral colour properties of the shadow as an RGB
>> value. The shadowDiffusion field specifies an blur over the shadow.
>> Shadow diffusion may range from 0.0 length units (no blur) to
>> infinity.  For every light there must be rendered an image of the
>> shadow, the shadow map.  The shadowMapSize field specifies the size of
>> this image in pixels.
>>
>> For a live demonstration have a look at:
>> http://titania.create3000.de/cobweb/dynamic-shadows/
>>
>> Best regards,
>> Holger
>>
>> *** COBWEB IMPLEMENTS DYNAMIC SHADOWS ***
>
> all the best, Don


-- 
Holger Seelig
Mediengestalter Digital – Digital Media Designer

Scheffelstraße 31a
04277 Leipzig
Germany

Cellular: +49 1577 147 26 11
E-Mail:   holger.seelig at create3000.de
Web:      http://titania.create3000.de

Future to the fantasy ★ ★