/***************************************************************************** * J3D.org Copyright (c) 2000 * Java Source * * This source is licensed under the GNU LGPL v2.1 * Please read http://www.gnu.org/copyleft/lgpl.html for more information * * This software comes with the standard NO WARRANTY disclaimer for any * purpose. Use it at your own risk. If there's a problem you get to fix it. * ****************************************************************************/ // Standard imports import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.media.j3d.*; import javax.vecmath.*; import java.awt.image.BufferedImage; // Application Specific imports // None /** * Demonstration of the scribble overlay. Presents a box on screen and allows * the user to draw over it with a mouse. * * @author Justin Couch * @version $Revision: 1.1 $ */ public class AlphaDemo extends DemoFrame implements ActionListener { private static final double BACK_CLIP_DISTANCE = 100.0; /** Full transparent colour for the background of the texture. */ // private static final Color CLEAR_COLOR = new Color(0, 0, 0, 1f); // private static final Color CLEAR_COLOR = new Color(0, 0, 0, 1f); private static final Color CLEAR_COLOR = Color.black; /** Colour of the text. */ // private static final Color TEXT_COLOR = new Color(1f, 1f, 1f, 1f); // private static final Color TEXT_COLOR = new Color(0, 0, 0, 0); private static final Color TEXT_COLOR = Color.white; /** Button to demo RGB textures */ private JButton rgbButton; /** Button to demo Alpha textures */ private JButton alphaButton; /** Button to return object to no texture */ private JButton noButton; /** The appearance we used to change the texture with */ private Appearance appearance; /** * Construct a new demo with no geometry currently showing, but the * default type is set to quads. */ public AlphaDemo() { super("Alpha texture test window"); add(canvas, BorderLayout.CENTER); buildScene(); rgbButton = new JButton("RGB"); rgbButton.addActionListener(this); alphaButton = new JButton("Alpha"); alphaButton.addActionListener(this); noButton = new JButton("None"); noButton.addActionListener(this); JPanel p1 = new JPanel(new FlowLayout()); p1.add(rgbButton); p1.add(alphaButton); p1.add(noButton); add(p1, BorderLayout.SOUTH); } /** * Process the change of state request from the colour selector panel. * * @param evt The event that caused this method to be called */ public void actionPerformed(ActionEvent evt) { Object src = evt.getSource(); if(src == noButton) { appearance.setTexture(null); } else if(src == rgbButton) { buildRGBTexture(); } else { buildAlphaTexture(); } } /** * Build the scenegraph for the canvas */ private void buildScene() { Color3f ambientBlue = new Color3f(0.0f, 0.02f, 0.5f); Color3f white = new Color3f(1, 1, 1); Color3f black = new Color3f(0.0f, 0.0f, 0.0f); Color3f blue = new Color3f(0.00f, 0.20f, 0.80f); Color3f specular = new Color3f(0.7f, 0.7f, 0.7f); VirtualUniverse universe = new VirtualUniverse(); Locale locale = new Locale(universe); BranchGroup view_group = new BranchGroup(); BranchGroup world_object_group = new BranchGroup(); ViewPlatform camera = new ViewPlatform(); Transform3D angle = new Transform3D(); angle.setTranslation(new Vector3d(0, 2, 10)); TransformGroup view_tg = new TransformGroup(angle); view_tg.setCapability(TransformGroup.ALLOW_CHILDREN_EXTEND); view_tg.setCapability(TransformGroup.ALLOW_CHILDREN_WRITE); view_tg.addChild(camera); view_group.addChild(view_tg); Point3d origin = new Point3d(0, 0, 0); BoundingSphere light_bounds = new BoundingSphere(origin, BACK_CLIP_DISTANCE); DirectionalLight headlight = new DirectionalLight(); headlight.setColor(white); headlight.setInfluencingBounds(light_bounds); view_tg.addChild(headlight); // Now the geometry. Let's just add a couple of the basic primitives // for testing. Material material = new Material(); material.setAmbientColor(ambientBlue); material.setDiffuseColor(blue); material.setSpecularColor(specular); material.setShininess(75.0f); material.setLightingEnable(true); TextureAttributes texAttr = new TextureAttributes(); // texAttr.setTextureMode(TextureAttributes.REPLACE); /**/ texAttr.setTextureMode(TextureAttributes.COMBINE); texAttr.setCombineRgbMode(TextureAttributes.COMBINE_REPLACE); texAttr.setCombineAlphaMode(TextureAttributes.COMBINE_REPLACE); texAttr.setCombineRgbSource(0, TextureAttributes.COMBINE_OBJECT_COLOR); texAttr.setCombineAlphaSource(0, TextureAttributes.COMBINE_TEXTURE_COLOR); texAttr.setCombineRgbFunction(0, TextureAttributes.COMBINE_SRC_COLOR); texAttr.setCombineAlphaFunction(0, TextureAttributes.COMBINE_SRC_ALPHA); /**/ TransparencyAttributes transp = new TransparencyAttributes(); transp.setTransparencyMode(TransparencyAttributes.BLENDED); appearance = new Appearance(); appearance.setMaterial(material); appearance.setCapability(Appearance.ALLOW_TEXTURE_WRITE); appearance.setTextureAttributes(texAttr); appearance.setTransparencyAttributes(transp); int format = TriangleStripArray.COORDINATES | TriangleStripArray.TEXTURE_COORDINATE_2 | TriangleStripArray.NORMALS ; float[] vertices = { -0.5f, -0.5f, 0, 0.5f, -0.5f, 0, -0.5f, 0.5f, 0, 0.5f, 0.5f, 0, }; float[] tex_coords = { 0, 0, 1, 0, 0, 1, 1, 1, }; float[] normals = { 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, }; int[] strips = { 4 }; TriangleStripArray geom = new TriangleStripArray(4, format, strips); geom.setCoordinates(0, vertices); geom.setTextureCoordinates(0, 0, tex_coords); geom.setNormals(0, normals); Shape3D shape = new Shape3D(geom, appearance); world_object_group.addChild(shape); // Add them to the locale PhysicalBody body = new PhysicalBody(); PhysicalEnvironment env = new PhysicalEnvironment(); View view = new View(); view.setBackClipDistance(BACK_CLIP_DISTANCE); view.setPhysicalBody(body); view.setPhysicalEnvironment(env); view.addCanvas3D(canvas); view.attachViewPlatform(camera); locale.addBranchGraph(view_group); locale.addBranchGraph(world_object_group); } /** * Build up the texture with pure alpha. */ private void buildAlphaTexture() { BufferedImage bi = new BufferedImage(128, 128, BufferedImage.TYPE_BYTE_GRAY); drawOnImage(bi); ImageComponent2D img_comp = new ImageComponent2D(ImageComponent2D.FORMAT_CHANNEL8, bi, true, false); Texture2D texture = new Texture2D(Texture2D.BASE_LEVEL, Texture.ALPHA, 128, 128); texture.setImage(0, img_comp); appearance.setTexture(texture); } private void buildRGBTexture() { BufferedImage bi = new BufferedImage(128, 128, BufferedImage.TYPE_BYTE_GRAY); drawOnImage(bi); ImageComponent2D img_comp = new ImageComponent2D(ImageComponent2D.FORMAT_CHANNEL8, bi, true, false); Texture2D texture = new Texture2D(Texture2D.BASE_LEVEL, Texture.RGBA, 128, 128); texture.setImage(0, img_comp); appearance.setTexture(texture); } private void drawOnImage(BufferedImage img) { Graphics2D g = img.createGraphics(); g.setColor(CLEAR_COLOR); g.fillRect(0, 0, 128, 128); g.setColor(TEXT_COLOR); g.fillRect(32, 32, 64, 64); g.setColor(CLEAR_COLOR); g.fillRect(48, 48, 32, 32); g.dispose(); } public static void main(String[] argv) { AlphaDemo demo = new AlphaDemo(); demo.setVisible(true); } }