Archive for 11月 30th, 2012

  1. Hello, Java 3D(Jython) World!

    Posted on 11月 30th, 2012 by cx20

    Java 3D

    Java 3D は Java による 3D グラフィックライブラリである。
    以下は Jython による Java 3D の使用例となっている。

    ソースコード

    Hello.py
    raw download
    from java.lang import Math
from java.awt import BorderLayout
from java.awt import GraphicsConfiguration
from java.awt import Font
from javax.media.j3d import Canvas3D
from javax.media.j3d import BranchGroup
from javax.media.j3d import Transform3D
from javax.media.j3d import TransformGroup
from javax.media.j3d import Appearance
from javax.media.j3d import Material
from javax.media.j3d import Font3D
from javax.media.j3d import FontExtrusion
from javax.media.j3d import Text3D
from javax.media.j3d import Shape3D
from javax.media.j3d import DirectionalLight
from javax.media.j3d import RotationInterpolator
from javax.media.j3d import Alpha
from javax.media.j3d import BoundingSphere
from javax.swing import JFrame
from javax.vecmath import Vector3f
from javax.vecmath import Color3f
from com.sun.j3d.utils.universe import SimpleUniverse
 
class HelloFrame(JFrame):
    def __init__(self, title ):
        self.setTitle(title)
        self.setSize(640, 480)
        self.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE )
        canvas3D = self.createCanvas3D()
        scene = self.createSceneGraph()
        self.connect(canvas3D, scene)
 
    def createCanvas3D(self):
        self.getContentPane().setLayout(BorderLayout())
        config = SimpleUniverse.getPreferredConfiguration()
        canvas3D = Canvas3D(config)
        self.getContentPane().add(canvas3D)
        return canvas3D
 
    def createSceneGraph(self):
        objRoot = BranchGroup()
        mover = self.moveTextBack()
        spinner = self.createSpinner()
        rotator = RotationInterpolator(Alpha(-1, 4000), spinner, Transform3D(), 0.0, Math.PI * 2)
        rotator.setSchedulingBounds( BoundingSphere() )
        spinner.addChild(rotator)
        objRoot.addChild(mover)
        mover.addChild(spinner)
        spinner.addChild(self.createTextShape())
        self.setLighting(mover)
        return objRoot
 
    def createSpinner(self):
        spinner = TransformGroup()
        spinner.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE)
        return spinner
 
    def moveTextBack(self):
        transform3D = Transform3D()
        transform3D.setTranslation(Vector3f(0.0, 0.0, -10.0))
        return TransformGroup(transform3D)
 
    def createTextShape(self):
        textAppear = Appearance()
        textAppear.setMaterial(Material())
        font3D = Font3D(Font("ＭＳ Ｐゴシック", Font.PLAIN, 1), FontExtrusion())
        textGeom = Text3D(font3D, "Hello, Java 3D World!")
        textGeom.setAlignment(Text3D.ALIGN_CENTER)
        textShape = Shape3D()
        textShape.setGeometry(textGeom)
        textShape.setAppearance(textAppear)
        return textShape
 
    def setLighting(self,objMove):
        light = DirectionalLight()
        light.setInfluencingBounds(BoundingSphere())
        light.setDirection(Vector3f(0.0,0.0,-1.0))
        light.setColor(Color3f(1.0, 1.0, 1.0))
        objMove.addChild(light)
 
    def connect(self,canvas3D, scene):
        universe = SimpleUniverse(canvas3D)
        universe.getViewingPlatform().setNominalViewingTransform()
        universe.addBranchGraph(scene)
 
if __name__ == '__main__':
    frame = HelloFrame("Hello, World")
    frame.setVisible(True)

    実行方法

    C:¥> jython Hello.rb

    実行結果

    +------------------------------------------+
|Hello, World!                    [_][~][X]|
+------------------------------------------+
|Hello, Java 3D World!                     |
|                                          |
|                                          |
|                                          |
|                                          |
|                                          |
|                                          |
|                                          |
|                                          |
|                                          |
+------------------------------------------+