java：VTKImagedata绘制三维体

直接上的代码：

package vtkdemoeasy;

import java.util.Random;

import vtk.vtkColorTransferFunction;
import vtk.vtkFloatArray;
import vtk.vtkGPUVolumeRayCastMapper;
import vtk.vtkImageData;
import vtk.vtkInformation;
import vtk.vtkInteractorStyleTrackballCamera;
import vtk.vtkNativeLibrary;
import vtk.vtkPiecewiseFunction;
import vtk.vtkRenderWindow;
import vtk.vtkRenderWindowInteractor;
import vtk.vtkRenderer;
import vtk.vtkVolume;
import vtk.vtkVolumeProperty;

public class Imagedata {

	/**
	 * @param args
	 */
	 static {
	        if (!vtkNativeLibrary.LoadAllNativeLibraries()) {
	          for (vtkNativeLibrary lib : vtkNativeLibrary.values()) {
	            if (!lib.IsLoaded()) {
	              System.out.println(lib.GetLibraryName() + " not loaded");
	            }
	          }
	        }
	        vtkNativeLibrary.DisableOutputWindow(null);
	      }
	 public static void creatImageData() {
		 int min_gray = 4;  
		 int   max_gray = 200;  
		 double    transparency = 0.03;  
		 int   dx = 5;
		 int  dy =5; 
		 int   dz = 5;  
		 int    x =  100;  
		 int    y = 100;  
		 int    z = 50;   
		    
		    //-----_建立图像数据-------  
	      vtkImageData  img=new vtkImageData();  
	      vtkInformation info=new vtkInformation();
	      //vtkInformation info2=img.GetInformation();
	      //此处也可以从img里面获取information，如  
	      //果information为空，则会创建一个新的，相当于调用New之后再SetInformation 
	      
	      img.SetDimensions(x, y, z);
	      img.SetSpacing(dx, dy, dz);
	      img.SetOrigin(0, 0, 0);
	      img.SetScalarType(8, info);//img->SetScalarType(VTK_UNSIGNED_CHAR, info);  
	      img.SetNumberOfScalarComponents(1, info);
	      img.AllocateScalars(info);
	      
	      int size=img.GetScalarSize();
	      int type=img.GetScalarType();
	      System.out.println(size);
	      System.out.println(type);
	      
	      float temp, max = 0;  
	      float[] tempfloat = new float[x * y * z];  
	      vtkFloatArray pointsScalars= new vtkFloatArray();
	  
	        for (int i = 0; i<x * y * z; i++)  
	        {  
	        	Random ran=new Random(); 
	        	temp=ran.nextFloat();
	        	System.out.println(temp);
	        	if (max < temp)  
	                max = temp; 
	        	tempfloat[i]=temp;
	        }
	        for (int i = 0; i<x * y * z; i++)  {
	        	pointsScalars.SetNumberOfTuples(x * y * z);//此行可有可无
			    pointsScalars.InsertValue(i,(tempfloat[i] / max * 255));//第1个参数是points点的Id，第2个参数是该点的属性值			    
	        }
	        img.GetPointData().SetScalars(pointsScalars);
	        
	        vtkGPUVolumeRayCastMapper volumeMapper =new   vtkGPUVolumeRayCastMapper();  
	        volumeMapper.SetInputData(img); 

	        vtkVolumeProperty volumeProperty=new vtkVolumeProperty();
	          
		    volumeProperty.SetInterpolationTypeToLinear();  
		    //volumeProperty.ShadeOn();  //打开或者关闭阴影测试  
		    volumeProperty.SetAmbient(0.4);  
		    volumeProperty.SetDiffuse(0.6);  
		    volumeProperty.SetSpecular(0.2);  
        
		    vtkPiecewiseFunction compositeOpacity =new vtkPiecewiseFunction(); 
	        compositeOpacity.ClampingOn();  
	        compositeOpacity.AddPoint(min_gray, 0);  
	        compositeOpacity.AddPoint(max_gray, transparency);  
	        
	        volumeProperty.SetScalarOpacity(compositeOpacity); //设置不透明度传输函数
		        
            vtkColorTransferFunction color=new vtkColorTransferFunction();
            color.AddRGBPoint(0.0, 0.0, 0.0, 0.0);  
            color.AddRGBPoint(36.0, 1.0, 0.0, 0.0);  
            color.AddRGBPoint(72.0, 1.0, 1.0, 0.0);  
            color.AddRGBPoint(108.0, 0.0, 1.0, 0.0);  
            color.AddRGBPoint(144.0, 0.0, 1.0, 1.0);  
            color.AddRGBPoint(180.0, 0.0, 0.0, 1.0);  
            color.AddRGBPoint(216.0, 1.0, 0.0, 1.0);  
            color.AddRGBPoint(255.0, 1.0, 1.0, 1.0); 
	            
            
            volumeProperty.SetColor(color);  
            
            vtkVolume volume = new  vtkVolume();  
            volume.SetMapper(volumeMapper);  
            volume.SetProperty(volumeProperty); 
             
            vtkRenderer ren =new vtkRenderer();
            ren.SetBackground(1.0, 1.0, 1.0);  
            ren.AddVolume(volume);  
            //ren.ResetCamera();  
            
          //创建显示窗口
     	   
     	   vtkRenderWindow renWin= new vtkRenderWindow(); 
     	   renWin.AddRenderer(ren);
     	   
     	   vtkRenderWindowInteractor iren= new vtkRenderWindowInteractor();
     	   vtkInteractorStyleTrackballCamera style= new vtkInteractorStyleTrackballCamera();
     	   iren.SetInteractorStyle(style);
     	   iren.SetRenderWindow(renWin);
     	   
     	   renWin.SetSize(700,700); 
     	   renWin.Render();
     	   iren.Start();
            
    
		}
		
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		creatImageData();
	}

}