public void Move(EngineNS.GamePlay.Camera.eCameraAxis axis, float step, bool moveWithLookAt = false)
{
if (Camera == null)
{
return;
}
var pos = Camera.CameraData.Position;
var lookAt = Camera.CameraData.LookAt;
switch (axis)
{
case EngineNS.GamePlay.Camera.eCameraAxis.Forward:
{
var dir = pos - lookAt;
if (moveWithLookAt)
{
dir.Normalize();
var temp = dir * step;
Camera.LookAtLH(pos - temp, lookAt - temp, EngineNS.Vector3.UnitY);
}
else
{
var len = dir.Length();
if (step < len)
{
dir.Normalize();
var newPos = pos - dir * step;
Camera.LookAtLH(newPos, lookAt, EngineNS.Vector3.UnitY);
}
}
}
break;
case EngineNS.GamePlay.Camera.eCameraAxis.Up:
{
var up = Camera.CameraData.Up;
up.Normalize();
if (moveWithLookAt)
{
var temp = up * step;
Camera.LookAtLH(pos - temp, lookAt - temp, up);
}
else
{
var delta = up * step;
var newPos = pos + delta;
var newLookAt = lookAt + delta;
Camera.LookAtLH(newPos, newLookAt, up);
}
}
break;
case EngineNS.GamePlay.Camera.eCameraAxis.Right:
{
var right = Camera.CameraData.Right;
right.Normalize();
var delta = right * step;
if (moveWithLookAt)
{
Camera.LookAtLH(pos - delta, lookAt - delta, Camera.CameraData.Up);
}
else
{
var newPos = pos - delta;
var newLookAt = lookAt - delta;
Camera.LookAtLH(newPos, newLookAt, Camera.CameraData.Up);
}
}
break;
}
}
public void Rotate(EngineNS.GamePlay.Camera.eCameraAxis axis, float angle, bool rotLookAt = false)
{
if (Camera == null)
{
return;
}
var pos = Camera.CameraData.Position;
var lookAt = Camera.CameraData.LookAt;
switch (axis)
{
case EngineNS.GamePlay.Camera.eCameraAxis.Forward:
{
var forward = Camera.CameraData.Direction;
var up = Camera.CameraData.Up;
var mat = EngineNS.Matrix.RotationAxis(forward, angle);
up = EngineNS.Vector3.TransformCoordinate(up, mat);
Camera.LookAtLH(pos, lookAt, up);
}
break;
case EngineNS.GamePlay.Camera.eCameraAxis.Up:
{
var up = EngineNS.Vector3.Dot(Camera.CameraData.Up, EngineNS.Vector3.UnitY) * EngineNS.Vector3.UnitY;
up.Normalize();
var mat = EngineNS.Matrix.RotationAxis(up, angle);
var dir = EngineNS.Vector3.TransformCoordinate((pos - lookAt), mat);
if (rotLookAt)
{
var newLookAt = pos - dir;
Camera.LookAtLH(pos, newLookAt, up);
}
else
{
var newPos = lookAt + dir;
Camera.LookAtLH(newPos, lookAt, up);
}
}
break;
case EngineNS.GamePlay.Camera.eCameraAxis.Right:
{
var right = Camera.CameraData.Right;
var mat = EngineNS.Matrix.RotationAxis(right, angle);
var dir = EngineNS.Vector3.TransformCoordinate((pos - lookAt), mat);
var up = EngineNS.Vector3.Cross(right, dir);
up.Normalize();
if (rotLookAt)
{
var newLookAt = pos - dir;
Camera.LookAtLH(pos, newLookAt, up);
}
else
{
var newPos = lookAt + dir;
Camera.LookAtLH(newPos, lookAt, up);
}
}
break;
}
}
