package require java

java::import java.awt.BorderLayout
java::import java.awt.GraphicsConfiguration
java::import java.awt.Font
java::import javax.media.j3d.Canvas3D
java::import javax.media.j3d.BranchGroup
java::import javax.media.j3d.Transform3D
java::import javax.media.j3d.TransformGroup
java::import javax.media.j3d.Appearance
java::import javax.media.j3d.Material
java::import javax.media.j3d.Font3D
java::import javax.media.j3d.FontExtrusion
java::import javax.media.j3d.Text3D
java::import javax.media.j3d.Shape3D
java::import javax.media.j3d.DirectionalLight
java::import javax.media.j3d.RotationInterpolator
java::import javax.media.j3d.Alpha
java::import javax.media.j3d.BoundingSphere
java::import javax.swing.JFrame
java::import javax.vecmath.Vector3f
java::import javax.vecmath.Color3f
java::import com.sun.j3d.utils.universe.SimpleUniverse

proc createCanvas3D { frame } {
    $frame setLayout [java::new BorderLayout]
    set config [java::call SimpleUniverse getPreferredConfiguration]
    set canvas3D [java::new Canvas3D $config]
    $frame add $canvas3D
    return $canvas3D
}

proc createSceneGraph {} {
    set objRoot [java::new BranchGroup]
    set mover [moveTextBack]
    set spinner [createSpinner]
    set rotator [java::new RotationInterpolator [java::new Alpha -1 4000] $spinner [java::new Transform3D] 0.0  [expr [java::field Math PI] * 2]]
    $rotator setSchedulingBounds [java::new BoundingSphere]
    $spinner addChild $rotator
    $objRoot addChild $mover
    $mover addChild $spinner
    $spinner addChild [createTextShape]
    setLighting $mover
    return $objRoot
}

proc createSpinner {} {
    set spinner [java::new TransformGroup]
    $spinner setCapability [java::field TransformGroup ALLOW_TRANSFORM_WRITE]
    return $spinner
}

proc moveTextBack {} {
    set transform3D [java::new Transform3D]
    $transform3D setTranslation [java::new Vector3f 0.0 0.0 -10.0]
    return [java::new TransformGroup $transform3D]
}

proc createTextShape {} {
    set textAppear [java::new Appearance]
    $textAppear setMaterial [java::new Material]
    set font3D [java::new Font3D [java::new Font "ＭＳ Ｐゴシック" [java::field Font PLAIN] 1] [java::new FontExtrusion]]
    set textGeom [java::new Text3D $font3D [java::new String "Hello, Java 3D World!"]]
    $textGeom setAlignment [java::field Text3D ALIGN_CENTER]
    set textShape [java::new Shape3D]
    $textShape setGeometry $textGeom
    $textShape setAppearance $textAppear
    return $textShape
}

proc setLighting { objMove } {
    set light [java::new DirectionalLight]
    $light setInfluencingBounds [java::new BoundingSphere]
    $light setDirection [java::new Vector3f 0.0 0.0 -1.0]
    $light setColor [java::new Color3f 1.0 1.0 1.0]
    $objMove addChild $light
}

proc connect { canvas3D scene } {
    set universe [java::new SimpleUniverse $canvas3D]
    set view [$universe getViewingPlatform]
    [$universe getViewingPlatform] setNominalViewingTransform
    $universe addBranchGraph $scene
}

set frame [java::new JFrame] 
$frame setDefaultCloseOperation [java::field JFrame EXIT_ON_CLOSE]
$frame setTitle "Hello, World"
$frame setSize 640 480
set canvas3D [createCanvas3D $frame]
set scene [createSceneGraph]
connect $canvas3D $scene
$frame setVisible true

vwait done