[x3d-public] COBWEB IMPLEMENTS DYNAMIC SHADOWS

[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
-- 
Don Brutzman  Naval Postgraduate School, Code USW/Br       brutzman at nps.edu
Watkins 270,  MOVES Institute, Monterey CA 93943-5000 USA   +1.831.656.2149
X3D graphics, virtual worlds, navy robotics http://faculty.nps.edu/brutzman