VTK IntPtr 사용법

 

IntPtr를 이용하여 FocalPoint 얻기 + IntPtr -> Double[] 값 복사하기

 

double[] ZOOT = new double[3]; 
int s = Marshal.SizeOf(ZOOT[0]) * ZOOT.Length;
System.IntPtr p = Marshal.AllocHGlobal(s);
ren1.GetActiveCamera().GetFocalPoint(p);
Marshal.Copy(p, ZOOT, 0, ZOOT.Length);

 

double[] ZOOT = new double[3];// (3);// { 100, 100, 100 };
int s = Marshal.SizeOf(ZOOT[0]) * ZOOT.Length; 
System.IntPtr p = Marshal.AllocHGlobal(s);
Marshal.Copy(ZOOT, 0, p, ZOOT.Length);
ren1.GetActiveCamera().SetFocalPoint(p);

 

/// 변수 선언
double[] fpD = new double[3];
double[] posD = new double[3];
int fps = Marshal.SizeOf(fpD[0]) * fpD.Length;
IntPtr fpP = Marshal.AllocHGlobal(fps);


ren1.GetActiveCamera().GetFocalPoint(fpP);
Marshal.Copy(fpP, fpD, 0, fpD.Length);
Console.WriteLine("[{0}] fpD : {1} {2} {3}\n", fpP, fpD[0], fpD[1], fpD[2]);

ren1.GetActiveCamera().GetPosition(fpP);
Marshal.Copy(fpP, posD, 0, posD.Length);
Console.WriteLine("[{0}] posD :{1} {2} {3} \n", fpP, posD[0], posD[1], posD[2]);

/// IntPtr를 공유해도 괜찮음.
ren1.GetActiveCamera().GetFocalPoint(fpP);
Marshal.Copy(fpP, fpD, 0, fpD.Length);
Console.WriteLine("[{0}] fpD : {1} {2} {3}\n", fpP, fpD[0], fpD[1], fpD[2]);

/// Marshal.Copy 는 데이터 복사가 됨 확인
fpD[0] = 100; fpD[1] = 0; fpD[2] = -100;
double[] chkD = new double[3];
ren1.GetActiveCamera().GetFocalPoint(fpP);
Marshal.Copy(fpP, chkD, 0, chkD.Length);
Console.WriteLine("[{0}] chkD : {1} {2} {3}\n", fpP, chkD[0], chkD[1], chkD[2]);

/// Reference 사용에 대한 메모리 공유 여부 확인
double[] refD = new double[3];
ren1.GetActiveCamera().GetFocalPoint(ref refD[0], ref refD[1], ref refD[2]);
Console.WriteLine("[{0}] refD : {1} {2} {3}\n", fpP, refD[0], refD[1], refD[2]);

/// Reference 주소 값의 값이 변경되지 않음.
refD[0] = 100; refD[1] = 0; refD[2] = -100;
double[] chkRefD = ren1.GetActiveCamera().GetFocalPoint();
Console.WriteLine("[{0}] chkRefD : {1} {2} {3}\n", fpP, chkRefD[0], chkRefD[1], chkRefD[2]);