Edit for Transparency

[MickeyB]

below is the nehe snippet for loading textures.  what changes need to be made to add transparncy to them?
I tried switching to TYPE_4BYTE_BGRA  but to no success.

Thanks

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/**        * Texture loading directly from LWJGL examples        */       private static final int loadTexture(String path) {             Image image = (new javax.swing.ImageIcon(path)).getImage();             // Exctract The Image            BufferedImage tex = new BufferedImage(image.getWidth(null), image.getHeight(null), BufferedImage.TYPE_3BYTE_BGR);             Graphics2D g = (Graphics2D) tex.getGraphics();             g.drawImage(image, null, null);             g.dispose();             // Flip Image            AffineTransform tx = AffineTransform.getScaleInstance(1, -1);             tx.translate(0, -image.getHeight(null));             AffineTransformOp op = new AffineTransformOp(tx, AffineTransformOp.TYPE_NEAREST_NEIGHBOR);             tex = op.filter(tex, null);             // Put Image In Memory            ByteBuffer scratch = ByteBuffer.allocateDirect(4 * tex.getWidth() * tex.getHeight());             byte data[] = (byte[]) tex.getRaster().getDataElements(0, 0, tex.getWidth(), tex.getHeight(), null);             scratch.clear();             scratch.put(data);             scratch.rewind();             // Create A IntBuffer For Image Address In Memory              IntBuffer buf = ByteBuffer.allocateDirect(4).order(ByteOrder.nativeOrder()).asIntBuffer();             GL11.glGenTextures(buf); // Create Texture In OpenGL               GL11.glBindTexture(GL11.GL_TEXTURE_2D, buf.get(0));             // Typical Texture Generation Using Data From The Image             // Linear Filtering            GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER, GL11.GL_LINEAR);             // Linear Filtering            GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MAG_FILTER, GL11.GL_LINEAR);             // Generate The Texture            GL11.glTexImage2D(GL11.GL_TEXTURE_2D, 0, GL11.GL_RGB, tex.getWidth(), tex.getHeight(), 0, GL11.GL_RGB, GL11.GL_UNSIGNED_BYTE, scratch);             return buf.get(0); // Return Image Address In Memory      }

[Funkapotamus]

Change :

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// Generate The Texture  GL11.glTexImage2D(GL11.GL_TEXTURE_2D, 0, GL11.GL_RGB, tex.getWidth(), tex.getHeight(), 0, GL11.GL_RGB, GL11.GL_UNSIGNED_BYTE, scratch);

To:

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// Generate The Texture  GL11.glTexImage2D(GL11.GL_TEXTURE_2D, 0, GL11.GL_RGBA, tex.getWidth(), tex.getHeight(), 0, GL11.GL_RGBA, GL11.GL_UNSIGNED_BYTE, scratch);

Basically change RGB to RGBA.  A is the alpha layer, or, the transparancy layer.  

[MickeyB]

still no transparency.  Can't get a simple color to be transluscent either

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GL11.glDisable(GL11.GL_TEXTURE_2D);                         GL11.glColor4f(1.0f, 0.4f, 0.3f, 0.2f);                         shield.draw(1.0f, 20, 16);                         GL11.glEnable(GL11.GL_TEXTURE_2D);                         GL11.glColor4f(1.0f, 1.0f, 1.0f, 1.0f);

Is just solid orange still....I am obviously missing something larger here.  

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[Orangy Tang]

Did you glEnable(GL_BLENDING) and set a suitable blend fuction up via glBlendFunc?

[MickeyB]

Thanks OT, had this:

1	GL11.glBlendFunc(GL11.GL_SRC_ALPHA,GL11.GL_ONE);

but not this:

1	GL11.glEnable(GL11.GL_BLEND);

Now my shield sphere is translucent!!!

You guys rock!