public void MouseMove(int x, int y)
{
if (MouseDownFlag)
{
Debug.WriteLine(" =================>MouseMove:", listenerName);
if (!cameraState.IsSameState(this.Camera))
{
SetCamera(this.Camera.Position, this.Camera.Target, this.Camera.UpVector);
Debug.WriteLine(string.Format(
" update camera state: {0}, {1}, {2}",
this.cameraState.position, this.cameraState.target, this.cameraState.up), listenerName);
}
this._endPosition = GetArcBallPosition(x, y);
Debug.WriteLine(string.Format(
" End position: {0}", this._endPosition), listenerName);
var cosAngle = _startPosition.dot(_endPosition) / (_startPosition.Magnitude() * _endPosition.Magnitude());
if (cosAngle > 1)
{
cosAngle = 1;
}
else if (cosAngle < -1)
{
cosAngle = -1;
}
Debug.Write(string.Format(" cos angle: {0}", cosAngle), listenerName);
var angle = mouseSensitivity * (float)(Math.Acos(cosAngle) / Math.PI * 180);
Debug.WriteLine(string.Format(
", angle: {0}", angle), listenerName);
_normalVector = _startPosition.cross(_endPosition).normalize();
if ((_normalVector.x == 0 && _normalVector.y == 0 && _normalVector.z == 0) ||
float.IsNaN(_normalVector.x) || float.IsNaN(_normalVector.y) || float.IsNaN(_normalVector.z))
{
Debug.WriteLine(" no movement recorded.", listenerName);
}
else
{
Debug.WriteLine(string.Format(
" normal vector: {0}", _normalVector), listenerName);
_startPosition = _endPosition;
mat4 newRotation = glm.rotate(angle, _normalVector);
Debug.WriteLine(string.Format(
" new rotation matrix: {0}", newRotation), listenerName);
this.totalRotation = newRotation * totalRotation;
Debug.WriteLine(string.Format(
" total rotation matrix: {0}", totalRotation), listenerName);
}
Debug.WriteLine(" -------------------MouseMove end.", listenerName);
}
}
/// <summary>
///
/// </summary>
/// <returns></returns>
public override string ToString()
{
return(string.Format("back:{0}|{3:0.00},up:{1}|{4:0.00},right:{2}|{5:0.00}",
back, up, right, back.Magnitude(), up.Magnitude(), right.Magnitude()));
//return base.ToString();
}