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 視野

図05_00:(1, 0, -5) から (1, 0, 0) を見る

/*
*   JAVA3D で視野アプレット
*/

import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.GraphicsConfiguration;
import javax.media.j3d.*;
import javax.vecmath.*;
import com.sun.j3d.utils.universe.*;

/* <applet code="java3Dtest05" width=300 height=300></applet> */
public class java3Dtest05 extends Applet{
  private SimpleUniverse universe = null;

  public BranchGroup createSceneGraph(){
    BranchGroup root = new BranchGroup();

    TransformGroup trans = new TransformGroup();
	trans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
	root.addChild(trans);

    Point3d[] vertices = new Point3d[3];

    vertices[0] = new Point3d(0.0, 0.5, 0.0);
    vertices[1] = new Point3d(-0.433, -0.25, 0.0);
    vertices[2] = new Point3d(0.433, -0.25, 0.0);

    TriangleArray geometry = new TriangleArray(vertices.length, GeometryArray.COORDINATES | GeometryArray.COLOR_3);
    geometry.setCoordinates(0, vertices);
    Color3f red = new Color3f(1.0f, 0.0f, 0.0f); 
    Color3f green = new Color3f(0.0f, 1.0f, 0.0f); 
    Color3f blue = new Color3f(0.0f, 0.0f, 1.0f);
    Color3f[] colors = {red, green, blue};
    geometry.setColors(0, colors);

    Shape3D shape = new Shape3D(geometry);

    trans.addChild(shape);

    Alpha rotationAlpha = new Alpha(-1, 0);
    RotationInterpolator rotator = new RotationInterpolator(rotationAlpha, trans);

    root.addChild(rotator);

    root.compile();

    return root;
  }

  public void init(){
    GraphicsConfiguration config = SimpleUniverse.getPreferredConfiguration();
    Canvas3D canvas3d = new Canvas3D(config);
    this.setLayout(new BorderLayout());
    this.add(canvas3d, BorderLayout.CENTER);

    BranchGroup scene = createSceneGraph();

    Transform3D pers = new Transform3D();
    Transform3D lookat = new Transform3D();

    universe = new SimpleUniverse(canvas3d);

    lookat.set(Transform3D.ZERO);
    pers.set(Transform3D.ZERO);

    Point3d eye = new Point3d(1.0, 0.0, -5.0);
    Point3d center = new Point3d(1.0, 0.0, 0.0);
    Vector3d upvector = new Vector3d(0.0, 1.0, 0.0);

    lookat.lookAt(eye, center, upvector);
    
    pers.perspective(Math.toRadians(90.0), 1.0, 0.1, 10.0);

    canvas3d.getView().setWindowEyepointPolicy(View.RELATIVE_TO_COEXISTENCE);
    canvas3d.getView().setProjectionPolicy(View.PERSPECTIVE_PROJECTION);
    canvas3d.getView().setCompatibilityModeEnable(true);
    canvas3d.getView().setVpcToEc(lookat);
    canvas3d.setMonoscopicViewPolicy(View.LEFT_EYE_VIEW);
    canvas3d.getView().setLeftProjection(pers);
    canvas3d.getView().setScreenScalePolicy(View.SCALE_SCREEN_SIZE);

    universe.addBranchGraph(scene);
  }

  public void destroy(){
    universe.cleanup();
  }
}

inserted by FC2 system