http://www.moccos.info/works/software/mmd.html#mouse

DxOpenNIMouse.cpp

#include "stdafx.h"
#include "DxOpenNIMouse.h"

bool DxOpenNIMouse::Init(HWND hWnd, bool EngFlag, LPDIRECT3DDEVICE9 lpDevice, WCHAR *f_path) {
	int i;
	for (i = 0; i < 15; i++) {
		BP_Vector[i].x = 0;
		BP_Vector[i].y = DxOpenNIBase::LostVertexY;
		BP_Vector[i].z = 0;
	}
	GetCursorPos(&BasePos);
	virtualDepth = 0.0f;
	speedX = speedY = 1.5f;
	speedZ = 45.0f;
	DxOpenNIBase::CreateDepthTexture(lpDevice, 10, 10);

	// test
	/*
	D3DLOCKED_RECT LPdest;
	DepthTex->LockRect(0,&LPdest,NULL, 0);
	DWORD *pDestImage = (DWORD*)LPdest.pBits;

	for(i = 0; i < texHeight * texWidth; i++) {
		*pDestImage++ = 0xffff0000;
	}
	DepthTex->UnlockRect(0);
	*/

	return true;
}

void DxOpenNIMouse::Clean(void) {
	DxOpenNIBase::ReleaseDepthTexture();
}

void DxOpenNIMouse::GetSkeltonJointPosition(int num, D3DXVECTOR3 *vec) {
#define SPEEDSTEP 0.1f
	POINT now;
	if (num == 0) {
		GetCursorPos(&now);
		if ((GetKeyState(VK_LBUTTON) < 0) && (GetKeyState(VK_RBUTTON) < 0)) {
			BasePos = now;
			virtualDepth = 0;
		}

		// Depth control
		if (GetKeyState('1') < 0) {
			virtualDepth += speedZ;
		}
		if (GetKeyState('2') < 0) {
			virtualDepth -= speedZ;
		}

		// Speed Control
		if (GetKeyState(VK_SHIFT) < 0) {
			if (GetKeyState(VK_F1) < 0) {
				speedX -= SPEEDSTEP;
			}
			if (GetKeyState(VK_F2) < 0) {
				speedY -= SPEEDSTEP;
			}
			if (GetKeyState(VK_F3) < 0) {
				speedZ -= SPEEDSTEP * 15;
			}
		} else {
			if (GetKeyState(VK_F1) < 0) {
				speedX += SPEEDSTEP;
			}
			if (GetKeyState(VK_F2) < 0) {
				speedY += SPEEDSTEP;
			}
			if (GetKeyState(VK_F3) < 0) {
				speedZ += SPEEDSTEP * 15;
			}
		}
		BP_Vector[0].x = (now.x - BasePos.x) * speedX;
		BP_Vector[0].y = (BasePos.y - now.y) * speedY;
		BP_Vector[0].z = virtualDepth;
	}
	*vec = BP_Vector[num];
}