//从四元数设置旋转矩阵
public static void Matrix3fSetRotationFromQuat4f(ref Matrix3fT NewObj, Tuple4fT q1)
{
float n, s;
float xs, ys, zs;
float wx, wy, wz;
float xx, xy, xz;
float yy, yz, zz;
n = (q1.s.X * q1.s.X) + (q1.s.Y * q1.s.Y) + (q1.s.Z * q1.s.Z) + (q1.s.W * q1.s.W);
s = (n > 0.0f) ? (2.0f / n) : 0.0f;
xs = q1.s.X * s; ys = q1.s.Y * s; zs = q1.s.Z * s;
wx = q1.s.W * xs; wy = q1.s.W * ys; wz = q1.s.W * zs;
xx = q1.s.X * xs; xy = q1.s.X * ys; xz = q1.s.X * zs;
yy = q1.s.Y * ys; yz = q1.s.Y * zs; zz = q1.s.Z * zs;
NewObj.s.XX = 1.0f - (yy + zz); NewObj.s.YX = xy - wz; NewObj.s.ZX = xz + wy;
NewObj.s.XY = xy + wz; NewObj.s.YY = 1.0f - (xx + zz); NewObj.s.ZY = yz - wx;
NewObj.s.XZ = xz - wy; NewObj.s.YZ = yz + wx; NewObj.s.ZZ = 1.0f - (xx + yy);
}
//更新鼠标状态
public void upstate()
{
if (!this.isZooming && this.isRClicked)
{ // 开始拖动
this.isZooming = true; // 设置拖动为变量为true
this.LastPt = this.MousePt;
this.lastZoomRate = this.zoomRate;
}
else if (this.isZooming)
{//正在拖动
if (this.isRClicked)
{ //拖动
CMatrixMath.Point2fSub(ref MousePt, LastPt);
this.zoomRate = this.lastZoomRate + this.MousePt.s.X * this.AdjustWidth * 2;
}
else
{ //停止拖动
this.isZooming = false;
}
}
else if (!this.isDragging && this.isClicked)
{ // 如果没有拖动
this.isDragging = true; // 设置拖动为变量为true
this.LastRot = this.ThisRot;
this.click(this.MousePt);
}
else if (this.isDragging)
{
if (this.isClicked)
{ //如果按住拖动
Tuple4fT ThisQuat = new Tuple4fT();
this.drag(MousePt, ref ThisQuat); // 更新轨迹球的变量
CMatrixMath.Matrix3fSetRotationFromQuat4f(ref ThisRot, ThisQuat); // 计算旋转量
CMatrixMath.Matrix3fMulMatrix3f(ref this.ThisRot, this.LastRot);
CMatrixMath.Matrix4fSetRotationFromMatrix3f(ref this.Transform, this.ThisRot);
}
else // 如果放开鼠标，设置拖动为false
this.isDragging = false;
}
}
//鼠标拖动计算旋转
public void drag(Tuple2fT NewPt, ref Tuple4fT NewRot)
{
//新的位置
_mapToSphere(NewPt, ref EnVec);
//计算旋转
//if (NewRot)
{
Tuple3fT Perp = new Tuple3fT();
//计算旋转轴
CMatrixMath.Vector3fCross(ref Perp, StVec, EnVec);
//如果不为0
if (CMatrixMath.Vector3fLength(Perp) > CMatrixMath.Epsilon)
{
//记录旋转轴
NewRot.s.X = Perp.s.X;
NewRot.s.Y = Perp.s.Y;
NewRot.s.Z = Perp.s.Z;
//在四元数中,w=cos(a/2)，a为旋转的角度
NewRot.s.W = CMatrixMath.Vector3fDot(StVec, EnVec);
}
//是0，说明没有旋转
else
{
NewRot.s.X =
NewRot.s.Y =
NewRot.s.Z =
NewRot.s.W = 0.0f;
}
}
}
public override bool OnTouchEvent(MotionEvent evt)
{
if (gMitcRender.TransState || gMitcRender.RotAState)
{
if (evt.Action == MotionEventActions.Down)
{
m_lastPos.Set(evt.GetX(), evt.GetY());
mMitcRender.GetWorldPoint(m_lastPos.X, m_lastPos.Y, ref m_lastwx, ref m_lastwy, ref m_lastwz);
m_curPos.X = m_lastPos.X;
m_curPos.Y = m_lastPos.Y;
m_curwx = m_lastwx;
m_curwy = m_lastwy;
m_curwz = m_lastwz;
Transing = true;
//gMitcRender.updateMatrix();
if (gMitcRender.RotAState)
{
Tuple2fT MousePt = new Tuple2fT();
MousePt.s.X = evt.GetX();
MousePt.s.Y = evt.GetY();
isDragging = true;
// string strWp = String.Format("Down ThisRot Rot:({0},{1},{2})", ThisRot.s.M00, ThisRot.s.M11, ThisRot.s.M22);
// Log.Debug(TAG, strWp);
LastRot = (Matrix3fT)ThisRot.Clone();
// strWp = String.Format("After Down LastRot Rot:({0},{1},{2})", LastRot.s.M00, LastRot.s.M11, LastRot.s.M22);
// Log.Debug(TAG, strWp);
m_arcball.click(MousePt);
}
}
else if (evt.Action == MotionEventActions.Up)
{
Transing = false;
if (gMitcRender.RotAState)
{
isDragging = false;
}
}
else if (evt.Action == MotionEventActions.Move)
{
m_curPos.Set(evt.GetX(), evt.GetY());
mMitcRender.GetWorldPoint(m_curPos.X, m_curPos.Y, ref m_curwx, ref m_curwy, ref m_curwz);
mMitcRender.buildTransform((m_curwx - m_lastwx), (m_curwy - m_lastwy), m_curwz - m_lastwz);
m_lastPos.X = m_curPos.X;
m_lastPos.Y = m_curPos.Y;
m_lastwx = m_curwx;
m_lastwy = m_curwy;
m_lastwz = m_curwz;
string strWp = String.Format("1.Move This Point:({0},{1},{2})", m_curwx, m_curwy, m_curwz);
Log.Debug(TAG, strWp);
if (gMitcRender.RotAState && isDragging)
{
Tuple4fT ThisQuat = new Tuple4fT();
Tuple2fT MousePt = new Tuple2fT();
MousePt.s.X = evt.GetX();
MousePt.s.Y = evt.GetY();
m_arcball.drag(MousePt, ref ThisQuat);
//string strWp = String.Format("1.Move This Rot:({0},{1},{2})", ThisRot.s.M00, ThisRot.s.M11, ThisRot.s.M22);
//Log.Debug(TAG, strWp);
CMatrixMath.Matrix3fSetRotationFromQuat4f(ref ThisRot, ThisQuat);
//strWp = String.Format("2.Move This Rot:({0},{1},{2})", ThisRot.s.M00, ThisRot.s.M11, ThisRot.s.M22);
//Log.Debug(TAG, strWp);
CMatrixMath.Matrix3fMulMatrix3f(ref ThisRot, LastRot);
//strWp = String.Format("3.Move This Rot:({0},{1},{2})", ThisRot.s.M00, ThisRot.s.M11, ThisRot.s.M22);
//Log.Debug(TAG, strWp);
//strWp = String.Format("Move Last Rot:({0},{1},{2})", LastRot.s.M00, LastRot.s.M11, LastRot.s.M22);
//Log.Debug(TAG, strWp);
Matrix4fT _tempTransform = mMitcRender.Transform;
CMatrixMath.Matrix4fSetRotationFromMatrix3f(ref _tempTransform, ThisRot);
m_arcball.upstate();
}
this.RequestRender();
}
return true;
}
else if (gMitcRender.ScaleState)
{
int nCnt = evt.PointerCount;
if ((evt.Action & MotionEventActions.Mask) == MotionEventActions.PointerDown && 2 == nCnt)//<span style="color:#ff0000;">2��ʾ������ָ</span>
{
m_lastPos.Set(evt.GetX(evt.GetPointerId(0)), evt.GetY(evt.GetPointerId(0)));
m_curPos.Set(evt.GetX(evt.GetPointerId(nCnt - 1)), evt.GetY(evt.GetPointerId(nCnt - 1)));
string strWp = String.Format("2 Down Point:({0}),({1})", m_lastPos.ToString(), m_curPos.ToString());
Log.Debug(TAG, strWp);
mOldCounts = 2;
mScaleFactor = 1.0f;
//gMitcRender.updateMatrix();
}
else if ((evt.Action & MotionEventActions.Mask) == MotionEventActions.PointerUp && 2 == nCnt)
{
m_lastPos.Set(evt.GetX(evt.GetPointerId(0)), evt.GetY(evt.GetPointerId(0)));
m_curPos.Set(evt.GetX(evt.GetPointerId(nCnt - 1)), evt.GetY(evt.GetPointerId(nCnt - 1)));
string strWp = String.Format("2 Up Point:({0}),({1})", m_lastPos.ToString(), m_curPos.ToString());
Log.Debug(TAG, strWp);
mOldCounts = 0;
mScaleFactor = 1.0f;
}
else if (evt.Action == MotionEventActions.Move && 2 == nCnt)
{
float lastlength = GetLength(m_lastPos, m_curPos);
m_lastPos.Set(evt.GetX(evt.GetPointerId(0)), evt.GetY(evt.GetPointerId(0)));
m_curPos.Set(evt.GetX(evt.GetPointerId(nCnt - 1)), evt.GetY(evt.GetPointerId(nCnt - 1)));
float curlength = GetLength(m_lastPos, m_curPos);
mScaleFactor = Math.Abs(lastlength) < 1.0e-6 ? 1.0f : (curlength / lastlength);
mMitcRender.buildScale(mScaleFactor);
this.RequestRender();
string strWp = String.Format("2 Move Point:({0}),({1})", m_lastPos.ToString(), m_curPos.ToString());
Log.Debug(TAG, strWp);
}
}
return true;
}
