Thank you Not exactly; what I want is that any black pixels within the star (a skull in my case) stay opaque at all times, as black is needed for proper rendering, and the remaining background to be transparent. I don't want the background showing through the main subject of the image (a skull floating in a room).
Humberto -----Original Message----- From: Discussion list for Java 3D API [mailto:[EMAIL PROTECTED] On Behalf Of Jeremy Booth Sent: Friday, June 06, 2003 3:13 PM To: [EMAIL PROTECTED] Subject: Re: [JAVA3D] Selective transparent background Hi Humberto I use the following code to create a lens flare effect http://darkvoid.newdawnsoftware.com/ -> screen shots, has some screen shots with them in, the image is an gray scale image where the black parts are totally transparent, and the while is opaque, anything in between is semi transparent, I hope it's what you were after. You might want to adjust the transparency src and dst functions as they are set up to act like lens flare, so they are additive. Jeremy ================= //Create the geometry for the oriented shape lightObject = new QuadArray(4,QuadArray.COORDINATES | QuadArray.NORMALS | QuadArray.TEXTURE_COORDINATE_2); Point3f[] vertecies = {new Point3f(-shapeEdge,-shapeEdge,0f), new Point3f(shapeEdge,-shapeEdge,0), new Point3f(shapeEdge,shapeEdge,0f), new Point3f(-shapeEdge,shapeEdge,0)}; lightObject.setCoordinates(0,vertecies); //create the texture coordinates TexCoord2f[] lightTextCoords = {new TexCoord2f(0f,0f), new TexCoord2f(1f,0f), new TexCoord2f(1f,1f), new TexCoord2f(0f,1f)}; lightObject.setTextureCoordinates(0,0,lightTextCoords); //set the normals Vector3f[] lightNormals = {new Vector3f(0f,0f,1f), new Vector3f(0f,0f,1f), new Vector3f(0f,0f,1f), new Vector3f(0f,0f,1f)}; lightObject.setNormals(0,lightNormals); //create the oriented shape and set the geometry lightShape = new OrientedShape3D(); lightShape.setRotationPoint(0f,0f,0f); lightShape.setGeometry(lightObject); lightShape.setAlignmentMode(OrientedShape3D.ROTATE_ABOUT_POINT); lightShape.setPickable(false); //load the texture URL textURL = ClassLoader.getSystemResource("data/star.jpg"); if(textURL == null) { Logger.log(Logger.ERROR, "Couldn't find data/star.jpg"); throw new RuntimeException("Couldn't find data/star.jpg"); } Texture texture = TextureResourcePool.getTexture(textURL); TextureAttributes texAttr = new TextureAttributes(); texAttr.setTextureMode(TextureAttributes.MODULATE); lightApp = new Appearance(); lightApp.setTexture(texture); lightApp.setTextureAttributes(texAttr); TransparencyAttributes t_attr = new TransparencyAttributes(TransparencyAttributes.BLENDED,0f, TransparencyAttributes.BLEND_SRC_ALPHA, TransparencyAttributes.BLEND_SRC_ALPHA); lightApp.setTransparencyAttributes( t_attr ); lightApp.setMaterial(new Material(black, colour, black, black, 0)); RenderingAttributes renderAttributes = new RenderingAttributes(); lightApp.setRenderingAttributes(renderAttributes); lightShape.setAppearance(lightApp); -- Homepage: http://www.computerbooth.com/ Code page: http://www.newdawnsoftware.com/ ======================================================================== === To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff JAVA3D-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help". =========================================================================== To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff JAVA3D-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help".
