Emissive component for PhongMaterial
kevin.rushforth at oracle.com
Mon Apr 15 12:36:45 UTC 2019
A doubling of the number of shaders was what I was hoping you could
avoid (else I question the value proposition of doing this). I haven't
looked at the logic recently, but my thought when I initially replied
was that you could use the "self-illum" shaders if either the self-illum
map was non-null or the new emissive component was non-zero. You would
probably need to pass in a pre-computed map of all 0s in the case where
emissive is used, but self-illum map is not.
On 4/13/2019 10:07 AM, Nir Lisker wrote:
> This might not be as simple as I thought. Even though adding the
> self-illumination color naively works, I suspect I need to add new
> blend modes for the combinations of the self-illumination color and
> the map. That is, in D3DPhongShader.h, 'SelfIlllumTotal = 2' should be
> replaced with an enum and get the same treatment the specular
> component gets. This means the number of pixelShaders doubles and many
> blending combinations (the ShaderFunction functions) are added, which
> need to be generated via the build.gradle file.
> Is this correct?
> On Wed, Apr 10, 2019 at 1:54 PM Kevin Rushforth
> <kevin.rushforth at oracle.com <mailto:kevin.rushforth at oracle.com>> wrote:
> Hi Nir,
> It seems like a straight-forward addition. On the one hand, an
> application can use the self-illumination map to accomplish the same
> thing. However, a separate emissive color does allow changing it
> creating a new 1x1 image each time, and makes it possible to
> combine a
> self-illumination map with a modulating emissive color without
> the two in the application, so I can see it being a nice convenience.
> Presuming there is no measurable performance hit, this seems fine
> to me.
> -- Kevin
> On 4/10/2019 3:01 AM, Nir Lisker wrote:
> > Hi Johan/Kevin,
> > Iv'e submitted an issue for adding an emissive component to
> > .
> > This component is the single-color counterpart of the
> > map. It functions the same way as diffuse color is to diffuse
> map and
> > specular color is to specular map.
> > Emissive colors are used to simulate an object giving off light
> since they
> > do not interact with external lighting.
> > Implementation will consist of simple changes to both 3D rendering
> > pipelines.
> > Please evaluate,
> > Nir
> >  https://bugs.openjdk.java.net/browse/JDK-8221720
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