第48课轨迹球实现的鼠标旋转

1、By Terence J. Grant )实现是基于Bretton Wades，它是基于Ken Shoemakes 实现的，最初的版本，你可以轨迹球实现的内容就是把二维的鼠标到三维的轨迹球，并基于它完成旋转变化到-1，1By Terence J. Grant )实现是基于Bretton Wades，它是基于Ken Shoemakes 实现的，最初的版本，你可以轨迹球实现的内容就是把二维的鼠标到三维的轨迹球，并基于它完成旋转变化到-1，1(MousePt.X / -1) / 2) -=-Y / (Height -1) / 2)-z0，把zzArcBall_t:ArcBall_t(GLfloat

2、NewWidth, GLfloat ArcBall_t:click(const 2fT* void ArcBall_t:drag(const 2fT* NewPt, Quat4fT* ArcBall_t:setBounds(GLfloat NewWidth, GLfloat Matrix4fT Transform = ArcBall_t:ArcBall_t(GLfloat NewWidth, GLfloat ArcBall_t:click(const 2fT* void ArcBall_t:drag(const 2fT* NewPt, Quat4fT* ArcBall_t:setBounds(

3、GLfloat NewWidth, GLfloat Matrix4fT Transform = 1.0f Matrix3fT LastRot = 1.0f, 0.0f, 0.0f, 1.0f, 0.0f,0.0f, 0.0f, 1.0f Matrix3fT ThisRot = 1.0f, 0.0f, 0.0f, 1.0f, 0.0f,0.0f, 0.0f, 1.0f ArcBallT ArcBall(640.0f, 2fT isClicked = false; / 是否点击鼠标 isRClicked = false; / 是否右击鼠标 isDragging = false; / 是否拖动矩阵，

4、thisRot当GLvoid GL height) . . . ArcBall.setBounds(GLfloat)width, / / LRESULT CALLBACK WindowProc (HWND hWnd, . GLvoid GL height) . . . ArcBall.setBounds(GLfloat)width, / / LRESULT CALLBACK WindowProc (HWND hWnd, . . case MousePt.s.X = MousePt.s.Y = isClicked = ram) & MK_LBUTTON) true : isRClicked =

5、ram) & MK_RBUTTON) ? true : WM_LBUTTONUP: isClicked = false; break; WM_RBUTTONUP: isRClicked = false; break; WM_LBUTTONDOWN: isClicked = true; WM_RBUTTONDOWN: isRClicked = true; . . Updateif (isRClicked) / ionFromMatrix3f(&Transform, if (!isDragging) / if (isClicked) / isDragging = true; / 设置拖动为变量为

6、true LastRot = ThisRot;if (isClicked) Quat4fT ArcBall.drag(&MousePt, &ThisQuat); / ionFromQuat4f(&ThisRot, &ThisQuat); / Matrix3fMulMatrix3f(&ThisRot, if (isClicked) Quat4fT ArcBall.drag(&MousePt, &ThisQuat); / ionFromQuat4f(&ThisRot, &ThisQuat); / Matrix3fMulMatrix3f(&ThisRot, ionFromMatrix3f(&Transfor