03-1 Java 3D基础-三维物体模型构造.pptVIP

Pointe3D Vector3D 3.1 Java 3D中的点和向量： 坐标，几何，3D形状 （Coordinates，Geometry，Shape3D） 属性 Attributes 外观 Appearance 3.2 类的定义： Color3f color=new Color3f(0.2f,0.5f,1.0f); /cd/E17802_01/j2se/javase/technologies/desktop/java3d/forDevelopers/j3dapi/javax/vecmath/Color3f.html Point3f point=new Point3f (x,y,z); 程序例子：displaypoints.java Java 3D 中点的形状和属性（Shape3D)： public Shape3D shapepoints(){ Shape3D shapepoints=new Shape3D(); float vertexes[]= { -1.0f, 1.0f,0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f,0.0f, -1.0f, 0.0f,0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f,0.0f, -1.0f,-1.0f,0.0f, 0.0f,-1.0f, 0.0f, 1.0f,-1.0f,0.0f, }; for (int i=0; i27; i++) vertexes[i]/=2.0; float pointcolors[]={ 1.0f,0.0f,0.0f, 0.0f,1.0f,0.0f, 0.0f,0.0f,1.0f, 1.0f,1.0f,0.0f, 0.0f,1.0f,1.0f, 1.0f,0.0f,1.0f, 0.0f,0.0f,0.0f, 0.3f,0.8f,1.0f, 0.9f,0.6f,2.0f }; int VertexCount=9; // 定义点的总数 PointArray points3D = new PointArray ( VertexCount, PointArray.COORDINATES|PointArray.COLOR_3); points3D .setCoordinates(0,vertexes); points3D .setColors(0,pointcolors); PointAttributes pointAttributes = new PointAttributes(); pointAttributes.setPointSize(10.f); pointAttributes.setPointAntialiasingEnable(true); Appearance app=new Appearance(); app.setPointAttributes(pointAttributes); shapepoints.setGeometry(points3D); shapepoints.setAppearance(app); return shapepoints; } 3.3 Java 3D 中点的坐标设置与点几何设定： 1 直接设定点 PointArray pointArray= new PointArray(3,GeometryArray.COORDINATES); pointArray.setCoordinate(0,new Point3f(0f,0f,0f)); pointArray.setCoordinate(1,new Point3f(1f,0f,0f)); pointArray.setCoordinate(2,new Point3f(0f,1f,0f)); 2 批量设定点 Point3d p1 = new point3d(1.0f, 2.3f, 0.0f); Point3d p2 = new point3d(0.0f, -0.5f, 1.2f); double dist