Didn't have a lot of time last night to play with this, but it didn't seem to work-
when I set the CombineRgbSource to COMBINE_PREVIOUS_TEXTURE_UNIT_STATE, which is what
I'm assuming you meant by ..._COLOR it just drew the whole thing the colour of the
object. I experimented with other settings- not relevant here, but setting it to
CONSTANT_COLOR actually turned the whole canvas black and white.
If I set the Alpha combine mode to COMBINE_CONSTANT_COLOR it just drew the background
object. COMBINE_TEXTURE_COLOR seems to work better, but I'm back where I started.
Is the problem that I'm using the Texture.LUMINANCE_ALPHA format?
Either way, here is the method that creates the TextureUnitState, I call it three
times along the lines of TUStates[0] = getShine("Texture1.gif", new Color4f(1.0, 0.0,
0.0, 0.0)); and so on.
private TextureUnitState getShine(String filename, Color4f emissive)
{
TextureUnitState bozer=null;
BufferedImage bi = new BufferedImage(128, 128, BufferedImage.TYPE_BYTE_GRAY);
Graphics2D g = bi.createGraphics();
Image inImage = new
ImageIcon("C:\\jdk1.3\\projects\\3dExperiments\\"+filename).getImage();
// What do you mean I shouldn't be using direct paths to my
files? :)
g.drawImage(inImage, null, null);
g.dispose();
ImageComponent2D alpha2D = new
ImageComponent2D(ImageComponent2D.FORMAT_CHANNEL8, bi, true, false);
Texture2D texter=new Texture2D(Texture2D.BASE_LEVEL, Texture.LUMINANCE_ALPHA,
128, 128);
texter.setImage(0, alpha2D);
TextureAttributes texatt=new TextureAttributes();
texatt.setTextureMode(TextureAttributes.COMBINE);
texatt.setCombineRgbMode(TextureAttributes.COMBINE_REPLACE);
texatt.setCombineRgbSource(0, texatt.COMBINE_TEXTURE_COLOR);
texatt.setCombineRgbFunction(0, TextureAttributes.COMBINE_SRC_COLOR);
texatt.setCombineAlphaMode(TextureAttributes.COMBINE_REPLACE);
texatt.setCombineAlphaSource(0, TextureAttributes.COMBINE_TEXTURE_COLOR);
texatt.setCombineAlphaFunction(0, TextureAttributes.COMBINE_SRC_ALPHA);
texatt.setTextureBlendColor(emissive) ;
TexCoordGeneration texas =
new TexCoordGeneration(TexCoordGeneration.OBJECT_LINEAR,
TexCoordGeneration.TEXTURE_COORDINATE_2);
texas.setPlaneS(new Vector4f(1f, 0f, 0f, 0.5f));
texas.setPlaneR(new Vector4f(0f, 1f, 0f, 1f));
bozer=new TextureUnitState(texter, texatt, texas);
return bozer;
}
Thanks for your time,
-ben
-----Original Message-----
From: Stoney Jackson [mailto:[EMAIL PROTECTED]]
Sent: 09 October 2002 17:26
To: [EMAIL PROTECTED]
Subject: Re: [JAVA3D] Running greyscale textures into colour/alpha
channels
I'm assuming that the last texture unit (tu[3]) represents the alpha
channel. I have not tried this specific code. But I do something similar in
another project. Let me know if it works :)
TextureAttributes ta = new TextureAttributes();
ta.setTextureMode(ta.COMBINE);
// Keep the color the same as it was
ta.setCombineRgbMode(ta.COMBINE_REPLACE);
ta.setCombineRgbSource(0, ta.COMBINE_PREVIOUS_TEXTURE_UNIT_COLOR);
// Replace the alpha with the texture's alpha.
ta.setCombineAlphaMode(ta.COMBINE_REPLACE);
ta.setCombineAlphaSource(0, ta.COMBINE_CONSTANT_COLOR);
ta.setCombineAlphaFunction(0, ta.COMBINE_SRC_ALPHA);
tu[3].setTextureAttributes(ta);
-Stoney
----- Original Message -----
From: "Ben Moxon" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, October 09, 2002 8:41 AM
Subject: Re: [JAVA3D] Running greyscale textures into colour/alpha channels
> I can see how that will work with setting the colour- what setting to I
have to use (in TextureAttributes.setTextureBlendColor() I'm guessing ) on
the alpha-channel to use the black -> white element of the image for alpha
as well as the colour channel?
>
> -ben
>
> -----Original Message-----
> From: Artur Biesiadowski [mailto:[EMAIL PROTECTED]]
> Sent: 09 October 2002 11:14
> To: [EMAIL PROTECTED]
> Subject: Re: [JAVA3D] Running greyscale textures into colour/alpha
> channels
>
>
> Ben Moxon wrote:
> > How would I go about mixing several textures so that each one fills a
colour channel and the alpha channel?
> >
> > I have created an array of TextureUnitStates, one for each texture, and
they are all drawing correctly but each texture is in a grey_scale/alpha
format and what I want is for texture1 to be red_channel/alpha, texture2 to
be green_channel_alpha and so on, blending them all so I get a white centre
and a mix of other colours around the edges where they merge.
>
>
> Use BLEND mode + set constant blend color to correct channel on each
stage.
>
> Never done this, but it should work this way.
>
> Artur
>
>
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