用JAVA如何画正方体 长方体
各位高手请教下上面的问题 要使用哪些类和方法
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继承JFrame，重写paint（Graphics g）方法，g.drawRect(x, y, width, height)
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长方体?
3d的?
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恩 是啊 要长方体呢
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下载一个官方3D插件：
JAVA 3D API 最新j3d-1_5_2-windows-i586.exe
https://java3d.dev.java.net/binary-builds
安装成功就可以运行以下程序
// JFrame
import javax.swing.JFrame;
// BorderLayout stuff
import java.awt.*;
import javax.swing.*;
// Canvas3D
import javax.media.j3d.Canvas3D;
// The Universe
import com.sun.j3d.utils.universe.SimpleUniverse;
// The BranchGroup
import javax.media.j3d.BranchGroup;
// For the Box
import com.sun.j3d.utils.geometry.Box;
import javax.vecmath.*;
// The directional light
import javax.media.j3d.DirectionalLight;
// For the bouding sphere of the light source
import javax.media.j3d.BoundingSphere;
import javax.media.j3d.Appearance;
import javax.media.j3d.Material;
// Transformgroup
import javax.media.j3d.TransformGroup;
import com.sun.j3d.utils.behaviors.mouse.*;
public class BasicConstruct extends JFrame
{
/**
* The SimpleUniverse object
*/
protected SimpleUniverse simpleU;
/**
* The root BranchGroup Object.
*/
protected BranchGroup rootBranchGroup;
/**
* Constructor that consturcts the window with the given
* name.
*
* @param name The name of the window, in String format
*/
public BasicConstruct(String name)
{
// The next line will construct the window and name it
// with the given name
super(name);
// Perform the initial setup, just once
initial_setup();
}
/**
* Perform the essential setups for the Java3D
*/
protected void initial_setup()
{
// A JFrame is a Container -- something that can hold
// other things, e.g a button, a textfield, etc..
// however, for a container to hold something, you need
// to specify the layout of the storage. For our
// example, we would like to use a BorderLayout.
// The next line does just this:
getContentPane().setLayout(new BorderLayout());
// The next step is to setup graphics configuration
// for Java3D. Since different machines/OS have differnt
// configuration for displaying stuff, therefore, for
// java3D to work, it is important to obtain the correct
// graphics configuration first.
GraphicsConfiguration config = SimpleUniverse.getPreferredConfiguration();
// Since we are doing stuff via java3D -- meaning we
// cannot write pixels directly to the screen, we need
// to construct a "canvas" for java3D to "paint". And
// this "canvas" will be constructed with the graphics
// information we just obtained.
Canvas3D canvas3D = new Canvas3D(config);
// And we need to add the "canvas to the centre of our
// window..
getContentPane().add("Center", canvas3D);
// Creates the universe
simpleU = new SimpleUniverse(canvas3D);
// First create the BranchGroup object
rootBranchGroup = new BranchGroup();
}
/**
* Adds a light source to the universe
*
* @param direction The inverse direction of the
* light
* @param color The color of the light
*/
public void addDirectionalLight(Vector3f direction, Color3f color)
{
// Creates a bounding sphere for the lights
BoundingSphere bounds = new BoundingSphere();
bounds.setRadius(1000d);
// Then create a directional light with the given
// direction and color
DirectionalLight lightD = new DirectionalLight(color, direction);
lightD.setInfluencingBounds(bounds);
// Then add it to the root BranchGroup
rootBranchGroup.addChild(lightD);
}
/**
* Adds a box to the universe
*
* @param x The x dimension of the box
* @param y The y dimension of the box
* @param z The z dimension of the box
*/
public void addBox(float x, float y, float z, Color3f diffuse, Color3f spec)
{
// Add a box with the given dimension
// First setup an appearance for the box
Appearance app = new Appearance();
Material mat = new Material();
mat.setDiffuseColor(diffuse);
mat.setSpecularColor(spec);
mat.setShininess(5.0f);
app.setMaterial(mat);
Box box = new Box(x, y, z, app);
// Create a TransformGroup and make it the parent of the box
TransformGroup tg = new TransformGroup();
tg.addChild(box);
// Then add it to the rootBranchGroup
rootBranchGroup.addChild(tg);
tg.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
tg.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
MouseRotate myMouseRotate = new MouseRotate();
myMouseRotate.setTransformGroup(tg);
myMouseRotate.setSchedulingBounds(new BoundingSphere());
rootBranchGroup.addChild(myMouseRotate);
MouseTranslate myMouseTranslate = new MouseTranslate();
myMouseTranslate.setTransformGroup(tg);
myMouseTranslate.setSchedulingBounds(new BoundingSphere());
rootBranchGroup.addChild(myMouseTranslate);
MouseZoom myMouseZoom = new MouseZoom();
myMouseZoom.setTransformGroup(tg);
myMouseZoom.setSchedulingBounds(new BoundingSphere());
rootBranchGroup.addChild(myMouseZoom);
}
/**
* Finalise everything to get ready
*/
public void finalise()
{
// Then add the branch group into the Universe
simpleU.addBranchGraph(rootBranchGroup);
// And set up the camera position
simpleU.getViewingPlatform().setNominalViewingTransform();
}
public static void main(String[] argv)
{
BasicConstruct bc = new BasicConstruct("Foo");
bc.setSize(250, 250);
bc.addBox(0.4f, 0.5f, 0.6f, new Color3f(1, 0, 0), new Color3f(1, 0, 0));
bc.addDirectionalLight(new Vector3f(0f, 0f, -1),
new Color3f(1f, 1f, 0f));
bc.finalise();
bc.show();
return;
}
}
[ 本帖最后由 lampeter123 于 2009-11-9 09:48 编辑 ]
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