Fix wipe tower issues with SEMM and ramming turned off (#6934)

* Fix wipe tower issues with SEMM and ramming turned off

* Purge tower last layer collision potential fix (for SEMM)

* Revert "Purge tower last layer collision potential fix (for SEMM)"

This reverts commit 9fc465c.

src/libslic3r/GCode/WipeTower2.cpp

@@ -893,7 +893,8 @@ void WipeTower2::toolchange_Unload(
  float remaining = xr - xl ; // keeps track of distance to the next turnaround
  float e_done = 0; // measures E move done from each segment 
 
- const bool do_ramming = m_semm || m_filpar[m_current_tool].multitool_ramming;
+ // Orca: Do ramming when SEMM and ramming is enabled or when multi tool head when ramming is enabled on the multi tool.
+ const bool do_ramming = (m_semm && m_enable_filament_ramming) || m_filpar[m_current_tool].multitool_ramming;
  const bool cold_ramming = m_is_mk4mmu3;
 
  if (do_ramming) {
@@ -1544,7 +1545,8 @@ void WipeTower2::plan_toolchange(float z_par, float layer_height_par, unsigned i
  float length_to_extrude = volume_to_length(0.25f * std::accumulate(m_filpar[old_tool].ramming_speed.begin(), m_filpar[old_tool].ramming_speed.end(), 0.f),
  m_perimeter_width * m_filpar[old_tool].ramming_line_width_multiplicator,
  layer_height_par);
- float ramming_depth = (int(length_to_extrude / width) + 1) * (m_perimeter_width * m_filpar[old_tool].ramming_line_width_multiplicator * m_filpar[old_tool].ramming_step_multiplicator) * m_extra_spacing_ramming;
+ // Orca: Set ramming depth to 0 if ramming is disabled.
+ float ramming_depth = m_enable_filament_ramming ? ((int(length_to_extrude / width) + 1) * (m_perimeter_width * m_filpar[old_tool].ramming_line_width_multiplicator * m_filpar[old_tool].ramming_step_multiplicator) * m_extra_spacing_ramming) : 0;
  float first_wipe_line = - (width*((length_to_extrude / width)-int(length_to_extrude / width)) - width);
 
  float first_wipe_volume = length_to_volume(first_wipe_line, m_perimeter_width * m_extra_flow, layer_height_par);