// This is called to update UV dragging
protected virtual void UpdateDragUV()
{
float u_ray;
// Calculate intersection position
Line2D ray = new Line2D(General.Map.VisualCamera.Position, General.Map.VisualCamera.Target);
Sidedef.Line.Line.GetIntersection(ray, out u_ray);
Vector3D intersect = General.Map.VisualCamera.Position + (General.Map.VisualCamera.Target - General.Map.VisualCamera.Position) * u_ray;
// Calculate offsets
Vector3D dragdelta = intersect - dragorigin;
Vector3D dragdeltaxy = dragdelta * deltaxy;
Vector3D dragdeltaz = dragdelta * deltaz;
float offsetx = dragdeltaxy.GetLength();
float offsety = dragdeltaz.GetLength();
if ((Math.Sign(dragdeltaxy.x) < 0) || (Math.Sign(dragdeltaxy.y) < 0) || (Math.Sign(dragdeltaxy.z) < 0))
{
offsetx = -offsetx;
}
if ((Math.Sign(dragdeltaz.x) < 0) || (Math.Sign(dragdeltaz.y) < 0) || (Math.Sign(dragdeltaz.z) < 0))
{
offsety = -offsety;
}
// Apply offsets
int newoffsetx = startoffsetx - (int)Math.Round(offsetx);
int newoffsety = startoffsety + (int)Math.Round(offsety);
mode.ApplyTextureOffsetChange(prevoffsetx - newoffsetx, prevoffsety - newoffsety);
prevoffsetx = newoffsetx;
prevoffsety = newoffsety;
mode.ShowTargetInfo();
}