/***************************************************************************** * 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.media.j3d.*; import javax.vecmath.*; import java.applet.Applet; import java.util.HashMap; // Application Specific imports import org.j3d.geom.terrain.*; import org.j3d.geom.Axis; import org.j3d.geom.GeometryGenerator; import org.j3d.geom.GeometryData; import org.j3d.geom.UnsupportedTypeException; import org.j3d.ui.navigation.MouseViewHandler; import org.j3d.ui.navigation.NavigationState; /** * Demonstration of the Fractal terrain generator *

* * @author Justin Couch * @version $Revision: 1.2 $ */ public class FractalTerrainApplet extends DemoApplet implements ActionListener, ItemListener { private static final double BACK_CLIP_DISTANCE = 100.0; /** The geometry that we're going to be setting the values for */ private Shape3D targetShape; /** The material that we're going to be toggling lighting */ private Material targetMaterial; /** The polygon attributes that we're going to be toggling wireframe */ private PolygonAttributes targetPolyAttr; /** The navigation information handler */ private MouseViewHandler viewHandler; /** The current type of geometry to generate for the primitive */ private int geometryType; /** Color ramp for the terrain colours */ private ColorRampGenerator colorGenerator; /** Generator for the terrain */ private FractalTerrainGenerator terrainGenerator; /** Map holding polygon rendering info */ private HashMap renderingMap; // bunch of text fields for the parameters private TextField widthTf; private TextField depthTf; private TextField heightTf; private TextField roughnessTf; private TextField iterationsTf; private TextField seaTf; /** Checkbox for Use sea level */ private Checkbox seaCheck; /** * Construct a new demo with no geometry currently showing, but the * default type is set to quads. */ public FractalTerrainApplet() { } public void init() { super.init(); CheckboxGroup chk_grp = new CheckboxGroup(); Checkbox solid = new Checkbox("Faces", chk_grp, true); Checkbox wireframe = new Checkbox("Wireframe", chk_grp, false); Checkbox point = new Checkbox("Points", chk_grp, false); solid.addItemListener(this); wireframe.addItemListener(this); point.addItemListener(this); renderingMap = new HashMap(); renderingMap.put(solid, new Integer(PolygonAttributes.POLYGON_FILL)); renderingMap.put(wireframe, new Integer(PolygonAttributes.POLYGON_LINE)); renderingMap.put(point, new Integer(PolygonAttributes.POLYGON_POINT)); setBackground(SystemColor.menu); Panel p1 = new Panel(new GridLayout(1, 4)); p1.setBackground(SystemColor.menu); p1.add(new Label("Render as: ")); p1.add(solid); p1.add(wireframe); p1.add(point); add(p1, BorderLayout.SOUTH); terrainGenerator = new FractalTerrainGenerator(30, 30, 10, true, 0, 4, 2, 0); viewHandler = new MouseViewHandler(); viewHandler.setCanvas(canvas); viewHandler.setButtonNavigation(MouseEvent.BUTTON1_MASK, NavigationState.FLY_STATE); viewHandler.setButtonNavigation(MouseEvent.BUTTON2_MASK, NavigationState.TILT_STATE); viewHandler.setButtonNavigation(MouseEvent.BUTTON3_MASK, NavigationState.PAN_STATE); // The rendering menu geometryType = GeometryData.QUADS; createParamsPanel(); buildScene(); // Setup the colour generator float[] heights = { 0, 0.2f, 1, 3, 8 }; Color3f[] colors = { new Color3f(0, 0, 1), new Color3f(1, 1, 0), new Color3f(0, 0.6f, 0), new Color3f(0, 1, 0), new Color3f(1, 1, 1), }; colorGenerator = new ColorRampGenerator(heights, colors); } /** * Process a button request - for regeneration of the terrain * * @param evt The event that caused this method to be called */ public void actionPerformed(ActionEvent evt) { // Strip the various fields try { float width = Float.parseFloat(widthTf.getText()); float depth = Float.parseFloat(depthTf.getText()); float height = Float.parseFloat(heightTf.getText()); int iterations = Integer.parseInt(iterationsTf.getText()); float roughness = Float.parseFloat(roughnessTf.getText()); boolean use_sea = seaCheck.getState(); float sea_level = Float.parseFloat(seaTf.getText()); terrainGenerator.setDimensions(width, depth); terrainGenerator.setGenerationFactors(height, iterations, roughness, 0); terrainGenerator.setSeaData(use_sea, sea_level); rebuildGeometry(); } catch(NumberFormatException nfe) { System.out.println("Number formatting problem"); } } /** * Process the item menus on the rendering menu * * @param evt The event that caused this method to be called */ public void itemStateChanged(ItemEvent evt) { Object src = evt.getSource(); boolean on = (evt.getStateChange() == ItemEvent.SELECTED); if(!on) return; Integer value = (Integer)renderingMap.get(src); targetPolyAttr.setPolygonMode(value.intValue()); } /** * Rebuild the geometry based on the internal flags */ private void rebuildGeometry() { GeometryData data = new GeometryData(); data.geometryType = geometryType; data.geometryComponents = GeometryData.TEXTURE_2D_DATA | GeometryData.NORMAL_DATA; try { terrainGenerator.generate(data); } catch(UnsupportedTypeException ute) { System.out.println("Geometry type is not supported"); return; } colorGenerator.generate(data); int format = GeometryArray.COORDINATES | GeometryArray.NORMALS | GeometryArray.COLOR_3; GeometryArray geom = null; IndexedGeometryArray i_geom; switch(geometryType) { case GeometryData.TRIANGLES: geom = new TriangleArray(data.vertexCount, format); break; case GeometryData.QUADS: geom = new QuadArray(data.vertexCount, format); break; case GeometryData.INDEXED_QUADS: i_geom = new IndexedQuadArray(data.vertexCount, format, data.indexesCount); i_geom.setCoordinateIndices(0, data.indexes); i_geom.setColorIndices(0, data.indexes); i_geom.setNormalIndices(0, data.indexes); geom = i_geom; break; case GeometryData.INDEXED_TRIANGLES: i_geom = new IndexedTriangleArray(data.vertexCount, format, data.indexesCount); i_geom.setCoordinateIndices(0, data.indexes); i_geom.setColorIndices(0, data.indexes); i_geom.setNormalIndices(0, data.indexes); geom = i_geom; break; case GeometryData.TRIANGLE_STRIPS: geom = new TriangleStripArray(data.vertexCount, format, data.stripCounts); break; case GeometryData.TRIANGLE_FANS: geom = new TriangleFanArray(data.vertexCount, format, data.stripCounts); break; case GeometryData.INDEXED_TRIANGLE_STRIPS: i_geom = new IndexedTriangleStripArray(data.vertexCount, format, data.indexesCount, data.stripCounts); i_geom.setCoordinateIndices(0, data.indexes); i_geom.setColorIndices(0, data.indexes); i_geom.setNormalIndices(0, data.indexes); geom = i_geom; break; case GeometryData.INDEXED_TRIANGLE_FANS: i_geom = new IndexedTriangleFanArray(data.vertexCount, format, data.indexesCount, data.stripCounts); i_geom.setCoordinateIndices(0, data.indexes); i_geom.setColorIndices(0, data.indexes); i_geom.setNormalIndices(0, data.indexes); geom = i_geom; break; } geom.setCoordinates(0, data.coordinates); geom.setNormals(0, data.normals); geom.setColors(0, data.colors); targetShape.setGeometry(geom); } /** * 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_TRANSFORM_READ); view_tg.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE); view_tg.setCapability(TransformGroup.ALLOW_LOCAL_TO_VWORLD_READ); view_tg.addChild(camera); view_group.addChild(view_tg); view_group.addChild(viewHandler.getTimerBehavior()); 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. targetMaterial = new Material(); targetMaterial.setAmbientColor(ambientBlue); targetMaterial.setDiffuseColor(blue); targetMaterial.setSpecularColor(specular); targetMaterial.setShininess(75.0f); targetMaterial.setLightingEnable(true); targetMaterial.setCapability(Material.ALLOW_COMPONENT_WRITE); Appearance blue_appearance = new Appearance(); blue_appearance.setMaterial(targetMaterial); targetPolyAttr = new PolygonAttributes(); targetPolyAttr.setCapability(PolygonAttributes.ALLOW_MODE_WRITE); targetPolyAttr.setCapability(PolygonAttributes.ALLOW_CULL_FACE_WRITE); targetPolyAttr.setCapability(PolygonAttributes.ALLOW_NORMAL_FLIP_WRITE); targetPolyAttr.setPolygonMode(targetPolyAttr.POLYGON_FILL); blue_appearance.setPolygonAttributes(targetPolyAttr); targetShape = new Shape3D(); targetShape.setCapability(Shape3D.ALLOW_GEOMETRY_WRITE); targetShape.setAppearance(blue_appearance); world_object_group.addChild(targetShape); // And the axis... Axis axis = new Axis(); world_object_group.addChild(axis); // another light DirectionalLight sunlight = new DirectionalLight(); sunlight.setColor(white); sunlight.setInfluencingBounds(light_bounds); sunlight.setDirection(-1, -1, 0); world_object_group.addChild(sunlight); // Add them to the locale world_object_group.compile(); locale.addBranchGraph(view_group); locale.addBranchGraph(world_object_group); 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); viewHandler.setViewInfo(view, view_tg); viewHandler.setNavigationSpeed(3.0f); } /** * Convenience method to create the parameter panel. */ private void createParamsPanel() { Panel main_panel = new Panel(new GridLayout(9, 1)); Panel p1 = new Panel(new BorderLayout()); p1.add(new Label("Parameters..."), BorderLayout.WEST); Panel p2 = new Panel(new BorderLayout()); widthTf = new TextField("30", 5); p2.add(new Label("Width:"), BorderLayout.WEST); p2.add(widthTf, BorderLayout.EAST); Panel p3 = new Panel(new BorderLayout()); depthTf = new TextField("30", 5); p3.add(new Label("Depth:"), BorderLayout.WEST); p3.add(depthTf, BorderLayout.EAST); Panel p4 = new Panel(new BorderLayout()); heightTf = new TextField("10", 5); p4.add(new Label("Max Height:"), BorderLayout.WEST); p4.add(heightTf, BorderLayout.EAST); Panel p5 = new Panel(new BorderLayout()); iterationsTf = new TextField("4", 5); p5.add(new Label("Iterations:"), BorderLayout.WEST); p5.add(iterationsTf, BorderLayout.EAST); Panel p6 = new Panel(new BorderLayout()); roughnessTf = new TextField("2", 5); p6.add(new Label("Roughness:"), BorderLayout.WEST); p6.add(roughnessTf, BorderLayout.EAST); Panel p7 = new Panel(new BorderLayout()); seaCheck = new Checkbox("Show sea level", true); p7.add(seaCheck, BorderLayout.EAST); Panel p8 = new Panel(new BorderLayout()); seaTf = new TextField("0", 5); p8.add(new Label("Sea Height:"), BorderLayout.WEST); p8.add(seaTf, BorderLayout.EAST); Panel p9 = new Panel(new BorderLayout()); Button go = new Button("Regenerate"); go.addActionListener(this); p9.add(go); main_panel.add(p1); main_panel.add(p2); main_panel.add(p3); main_panel.add(p4); main_panel.add(p5); main_panel.add(p6); main_panel.add(p7); main_panel.add(p8); main_panel.add(p9); Panel spacer = new Panel(new BorderLayout()); spacer.add(main_panel, BorderLayout.NORTH); add(spacer, BorderLayout.EAST); } }