OpenGL+MFC实现旋转、缩放、平移

#include “StdAfx.h“
#include “ArcBall.h“
#include“Matrix.h“
#include

ArcBall::ArcBall（void）
{
	m_rotation.SetIdentity（）;
}

ArcBall::~ArcBall（void）
{
}

void ArcBall::SetBound（int Width int height）
{

		m_winWidth=Width;
		m_winHeight=height;
}

Point3D ArcBall::CoordToSphere（int x int y）
{
	double xScale = 2.0 / m_winWidth;
	double yScale = 2.0 / m_winHeight;
	
	double xPos = x * xScale - 1;
	double yPos = 1 - y * yScale;
	double zPos = 0.0;

	double len = xPos * xPos + yPos * yPos;
	if （len < 1.0）
	{
		zPos = sqrt（1.0 - len）;
	}

	return Point3D（xPos yPos zPos）;
}
void ArcBall::click（const CPoint &pt）
{
	m_ptlast = CoordToSphere（pt.xpt.y）;
}

void ArcBall::drag（const CPoint &pt）
{
	Point3D ptCur =  CoordToSphere（pt.xpt.y）;
	CVector3D axis = m_ptlast * ptCur;
	m_ptlast.Normalize（）;
	ptCur.Normalize（）;

	double c = m_ptlast % ptCur;
	double angle = 2*acos（c）;

	CMatrix matrix = CMatrix::GetRotationMatrix（angleaxis[0]axis[1]axis[2]）;
	m_rotation = matrix * m_rotation;
	m_ptlast = ptCur;
}
double *ArcBall::GetRotationData（）
{
	static double data[16];

	data[0] =m_rotation[0][0];
	data[1] =m_rotation[1][0];
	data[2] =m_rotation[2][0];
	data[3] = 0;

	data[4] = m_rotation[0][1];
	data[5] = m_rotation[1][1];
	data[6] = m_rotation[2][1];
	data[7] = 0;

	data[8] =m_rotation[0][2];
	data[9] = m_rotation[1][2];
	data[10] = m_rotation[2][2];
	data[11] = 0;

	data[12] = 0;
	data[13] = 0;
	data[14] = 0;
	data[15] = 1;

	return data;
}

 属性            大小     日期    时间   名称
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     目录           0  2018-01-02 09:14  paint_cylinder
     目录           0  2017-12-13 00:34  paint_cylinderDebug
     文件      252416  2017-12-13 00:34  paint_cylinderDebugpaint_cylinder.exe
     文件     1897296  2017-12-13 00:34  paint_cylinderDebugpaint_cylinder.ilk
     文件     5524480  2017-12-13 00:34  paint_cylinderDebugpaint_cylinder.pdb
     目录           0  2017-12-27 08:08  paint_cylinderipch
     目录           0  2018-01-02 09:14  paint_cylinderipchpaint_cylinder-3829da0b
     目录           0  2018-01-02 09:12  paint_cylinderpaint_cylinder
     文件        1548  2017-12-12 21:00  paint_cylinderpaint_cylinderArcBall.cpp
     文件         384  2017-12-12 21:00  paint_cylinderpaint_cylinderArcBall.h
     目录           0  2017-12-13 00:34  paint_cylinderpaint_cylinderDebug
     文件       16563  2017-12-12 21:08  paint_cylinderpaint_cylinderDebugArcBall.obj
     文件       67236  2017-12-13 00:34  paint_cylinderpaint_cylinderDebugCL.read.1.tlog
     文件        7588  2017-12-13 00:34  paint_cylinderpaint_cylinderDebugCL.write.1.tlog
     文件       89298  2017-12-12 21:08  paint_cylinderpaint_cylinderDebugMainFrm.obj
     文件       15162  2017-12-12 21:08  paint_cylinderpaint_cylinderDebugMatrix.obj
     文件        9680  2017-12-12 21:09  paint_cylinderpaint_cylinderDebugPoint3D.obj
     文件        6298  2017-12-13 00:34  paint_cylinderpaint_cylinderDebugcl.command.1.tlog
     文件           2  2017-12-13 00:34  paint_cylinderpaint_cylinderDebuglink-cvtres.read.1.tlog
     文件           2  2017-12-13 00:34  paint_cylinderpaint_cylinderDebuglink-cvtres.write.1.tlog
     文件           2  2017-12-13 00:34  paint_cylinderpaint_cylinderDebuglink.13012-cvtres.read.1.tlog
     文件           2  2017-12-13 00:34  paint_cylinderpaint_cylinderDebuglink.13012-cvtres.write.1.tlog
     文件           2  2017-12-13 00:34  paint_cylinderpaint_cylinderDebuglink.13012.read.1.tlog
     文件           2  2017-12-13 00:34  paint_cylinderpaint_cylinderDebuglink.13012.write.1.tlog
     文件           2  2017-12-13 00:34  paint_cylinderpaint_cylinderDebuglink.1364-cvtres.read.1.tlog
     文件           2  2017-12-13 00:34  paint_cylinderpaint_cylinderDebuglink.1364-cvtres.write.1.tlog
     文件           2  2017-12-13 00:34  paint_cylinderpaint_cylinderDebuglink.1364.read.1.tlog
     文件           2  2017-12-13 00:34  paint_cylinderpaint_cylinderDebuglink.1364.write.1.tlog
     文件           2  2017-12-13 00:34  paint_cylinderpaint_cylinderDebuglink.2472-cvtres.read.1.tlog
     文件           2  2017-12-13 00:34  paint_cylinderpaint_cylinderDebuglink.2472-cvtres.write.1.tlog
     文件           2  2017-12-13 00:34  paint_cylinderpaint_cylinderDebuglink.2472.read.1.tlog
............此处省略71个文件信息