private void ProcessRotationDrag()
{
if (m_activeAxis == EGizmoAxis.None)
{
return;
}
if (m_activeAxisList.Count <= 0)
{
return;
}
Matrix viewProj = m_frameViewInfo.ViewMatrix * m_frameViewInfo.ProjectionMatrix;
SharpDX.Vector2 mouseDelta = new SharpDX.Vector2(Input.GetNativeAxisValue(EInputAxis.MouseX), -Input.GetNativeAxisValue(EInputAxis.MouseY));
SharpDX.Vector2 screenAxis = (SharpDX.Vector2)Vector3.TransformNormal(m_rotationDragAxis, viewProj);
screenAxis.Normalize();
float deltaMove = -SharpDX.Vector2.Dot(mouseDelta, screenAxis) * RotationSpeed;
m_totalAngleDelta += deltaMove;
float snappedAngle = m_totalAngleDelta;
if (AngleSnap > 0.0f)
{
snappedAngle = m_totalAngleDelta - m_totalAngleDelta % AngleSnap;
}
Quaternion deltaRotation = Quaternion.RotationAxis(m_activeAxisList[0], snappedAngle);
m_controlledTransform.SetWorldRotation(deltaRotation * m_originalRotation);
}
private void ProcessScaleDrag()
{
if (m_activeAxis == EGizmoAxis.None)
{
return;
}
if (m_activeAxisList.Count <= 0)
{
return;
}
Matrix viewProj = m_frameViewInfo.ViewMatrix * m_frameViewInfo.ProjectionMatrix;
SharpDX.Vector2 mouseDelta = new SharpDX.Vector2(Input.GetNativeAxisValue(EInputAxis.MouseX), -Input.GetNativeAxisValue(EInputAxis.MouseY));
SharpDX.Vector2 screenAxis;
switch (m_activeAxisList.Count)
{
case 1:
screenAxis = (SharpDX.Vector2)Vector3.TransformNormal(m_activeAxisList[0], viewProj);
break;
case 2:
screenAxis = (SharpDX.Vector2)Vector3.TransformNormal(m_activeAxisList[0] + m_activeAxisList[1], viewProj);
break;
case 3:
screenAxis = new SharpDX.Vector2(0.5f, 0.5f);
break;
default:
throw new ArgumentOutOfRangeException();
}
screenAxis.Normalize();
float deltaMove = SharpDX.Vector2.Dot(mouseDelta, screenAxis) * ScaleSpeed * m_scaleSizeFactor;
m_totalScaleDelta += deltaMove;
float snappedDelta = m_totalScaleDelta;
if (ScaleSnap > 0.0f)
{
snappedDelta = m_totalScaleDelta - m_totalScaleDelta % AngleSnap;
}
m_controlledTransform.SetWorldScale(m_originalScale + m_scaleAxis * snappedDelta);
}
