Cleanup: Split View3D navigation code into specific compilation units

The view3d_edit.c file is already getting big (5436 lines) and mixes
operators of different uses.

Splitting the code makes it easier to read and simplifies the
implementation of new features.

Differential Revision: https://developer.blender.org/D13976

1 files changed, 1595 insertions, 0 deletions

diff --git a/source/blender/editors/space_view3d/view3d_navigate.c b/source/blender/editors/space_view3d/view3d_navigate.c
new file mode 100644
index 00000000000..d57a803b73f
--- /dev/null
+++ b/source/blender/editors/space_view3d/view3d_navigate.c
@@ -0,0 +1,1595 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+/** \file
+ * \ingroup spview3d
+ */
+
+#include "DNA_curve_types.h"
+#include "DNA_gpencil_types.h"
+
+#include "MEM_guardedalloc.h"
+
+#include "BLI_math.h"
+#include "BLI_rect.h"
+
+#include "BKE_armature.h"
+#include "BKE_context.h"
+#include "BKE_gpencil_geom.h"
+#include "BKE_layer.h"
+#include "BKE_object.h"
+#include "BKE_paint.h"
+#include "BKE_scene.h"
+#include "BKE_screen.h"
+#include "BKE_vfont.h"
+
+#include "DEG_depsgraph_query.h"
+
+#include "ED_mesh.h"
+#include "ED_particle.h"
+#include "ED_screen.h"
+#include "ED_transform.h"
+
+#include "WM_api.h"
+#include "WM_message.h"
+
+#include "RNA_access.h"
+#include "RNA_define.h"
+
+#include "UI_resources.h"
+
+#include "view3d_intern.h"
+
+#include "view3d_navigate.h" /* own include */
+
+/* -------------------------------------------------------------------- */
+/** \name Navigation Polls
+ * \{ */
+
+static bool view3d_pan_poll(bContext *C)
+{
+  if (ED_operator_region_view3d_active(C)) {
+    const RegionView3D *rv3d = CTX_wm_region_view3d(C);
+    return !(RV3D_LOCK_FLAGS(rv3d) & RV3D_LOCK_LOCATION);
+  }
+  return false;
+}
+
+bool view3d_zoom_or_dolly_poll(bContext *C)
+{
+  if (ED_operator_region_view3d_active(C)) {
+    const RegionView3D *rv3d = CTX_wm_region_view3d(C);
+    return !(RV3D_LOCK_FLAGS(rv3d) & RV3D_LOCK_ZOOM_AND_DOLLY);
+  }
+  return false;
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name Generic View Operator Properties
+ * \{ */
+
+void view3d_operator_properties_common(wmOperatorType *ot, const enum eV3D_OpPropFlag flag)
+{
+  if (flag & V3D_OP_PROP_MOUSE_CO) {
+    PropertyRNA *prop;
+    prop = RNA_def_int(ot->srna, "mx", 0, 0, INT_MAX, "Region Position X", "", 0, INT_MAX);
+    RNA_def_property_flag(prop, PROP_HIDDEN);
+    prop = RNA_def_int(ot->srna, "my", 0, 0, INT_MAX, "Region Position Y", "", 0, INT_MAX);
+    RNA_def_property_flag(prop, PROP_HIDDEN);
+  }
+  if (flag & V3D_OP_PROP_DELTA) {
+    RNA_def_int(ot->srna, "delta", 0, INT_MIN, INT_MAX, "Delta", "", INT_MIN, INT_MAX);
+  }
+  if (flag & V3D_OP_PROP_USE_ALL_REGIONS) {
+    PropertyRNA *prop;
+    prop = RNA_def_boolean(
+        ot->srna, "use_all_regions", 0, "All Regions", "View selected for all regions");
+    RNA_def_property_flag(prop, PROP_SKIP_SAVE);
+  }
+  if (flag & V3D_OP_PROP_USE_MOUSE_INIT) {
+    WM_operator_properties_use_cursor_init(ot);
+  }
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name Generic View Operator Custom-Data
+ * \{ */
+
+void calctrackballvec(const rcti *rect, const int event_xy[2], float r_dir[3])
+{
+  const float radius = TRACKBALLSIZE;
+  const float t = radius / (float)M_SQRT2;
+  const float size[2] = {BLI_rcti_size_x(rect), BLI_rcti_size_y(rect)};
+  /* Aspect correct so dragging in a non-square view doesn't squash the direction.
+   * So diagonal motion rotates the same direction the cursor is moving. */
+  const float size_min = min_ff(size[0], size[1]);
+  const float aspect[2] = {size_min / size[0], size_min / size[1]};
+
+  /* Normalize x and y. */
+  r_dir[0] = (event_xy[0] - BLI_rcti_cent_x(rect)) / ((size[0] * aspect[0]) / 2.0);
+  r_dir[1] = (event_xy[1] - BLI_rcti_cent_y(rect)) / ((size[1] * aspect[1]) / 2.0);
+  const float d = len_v2(r_dir);
+  if (d < t) {
+    /* Inside sphere. */
+    r_dir[2] = sqrtf(square_f(radius) - square_f(d));
+  }
+  else {
+    /* On hyperbola. */
+    r_dir[2] = square_f(t) / d;
+  }
+}
+
+void viewops_data_alloc(bContext *C, wmOperator *op)
+{
+  ViewOpsData *vod = MEM_callocN(sizeof(ViewOpsData), "viewops data");
+
+  /* store data */
+  op->customdata = vod;
+  vod->bmain = CTX_data_main(C);
+  vod->depsgraph = CTX_data_ensure_evaluated_depsgraph(C);
+  vod->scene = CTX_data_scene(C);
+  vod->area = CTX_wm_area(C);
+  vod->region = CTX_wm_region(C);
+  vod->v3d = vod->area->spacedata.first;
+  vod->rv3d = vod->region->regiondata;
+}
+
+void view3d_orbit_apply_dyn_ofs(float r_ofs[3],
+                                const float ofs_old[3],
+                                const float viewquat_old[4],
+                                const float viewquat_new[4],
+                                const float dyn_ofs[3])
+{
+  float q[4];
+  invert_qt_qt_normalized(q, viewquat_old);
+  mul_qt_qtqt(q, q, viewquat_new);
+
+  invert_qt_normalized(q);
+
+  sub_v3_v3v3(r_ofs, ofs_old, dyn_ofs);
+  mul_qt_v3(q, r_ofs);
+  add_v3_v3(r_ofs, dyn_ofs);
+}
+
+void viewrotate_apply_dyn_ofs(ViewOpsData *vod, const float viewquat_new[4])
+{
+  if (vod->use_dyn_ofs) {
+    RegionView3D *rv3d = vod->rv3d;
+    view3d_orbit_apply_dyn_ofs(
+        rv3d->ofs, vod->init.ofs, vod->init.quat, viewquat_new, vod->dyn_ofs);
+  }
+}
+
+bool view3d_orbit_calc_center(bContext *C, float r_dyn_ofs[3])
+{
+  static float lastofs[3] = {0, 0, 0};
+  bool is_set = false;
+
+  const Depsgraph *depsgraph = CTX_data_ensure_evaluated_depsgraph(C);
+  Scene *scene = CTX_data_scene(C);
+  ViewLayer *view_layer_eval = DEG_get_evaluated_view_layer(depsgraph);
+  View3D *v3d = CTX_wm_view3d(C);
+  Object *ob_act_eval = OBACT(view_layer_eval);
+  Object *ob_act = DEG_get_original_object(ob_act_eval);
+
+  if (ob_act && (ob_act->mode & OB_MODE_ALL_PAINT) &&
+      /* with weight-paint + pose-mode, fall through to using calculateTransformCenter */
+      ((ob_act->mode & OB_MODE_WEIGHT_PAINT) && BKE_object_pose_armature_get(ob_act)) == 0) {
+    /* in case of sculpting use last average stroke position as a rotation
+     * center, in other cases it's not clear what rotation center shall be
+     * so just rotate around object origin
+     */
+    if (ob_act->mode &
+        (OB_MODE_SCULPT | OB_MODE_TEXTURE_PAINT | OB_MODE_VERTEX_PAINT | OB_MODE_WEIGHT_PAINT)) {
+      float stroke[3];
+      BKE_paint_stroke_get_average(scene, ob_act_eval, stroke);
+      copy_v3_v3(lastofs, stroke);
+    }
+    else {
+      copy_v3_v3(lastofs, ob_act_eval->obmat[3]);
+    }
+    is_set = true;
+  }
+  else if (ob_act && (ob_act->mode & OB_MODE_EDIT) && (ob_act->type == OB_FONT)) {
+    Curve *cu = ob_act_eval->data;
+    EditFont *ef = cu->editfont;
+
+    zero_v3(lastofs);
+    for (int i = 0; i < 4; i++) {
+      add_v2_v2(lastofs, ef->textcurs[i]);
+    }
+    mul_v2_fl(lastofs, 1.0f / 4.0f);
+
+    mul_m4_v3(ob_act_eval->obmat, lastofs);
+
+    is_set = true;
+  }
+  else if (ob_act == NULL || ob_act->mode == OB_MODE_OBJECT) {
+    /* object mode use boundbox centers */
+    Base *base_eval;
+    uint tot = 0;
+    float select_center[3];
+
+    zero_v3(select_center);
+    for (base_eval = FIRSTBASE(view_layer_eval); base_eval; base_eval = base_eval->next) {
+      if (BASE_SELECTED(v3d, base_eval)) {
+        /* use the boundbox if we can */
+        Object *ob_eval = base_eval->object;
+
+        if (ob_eval->runtime.bb && !(ob_eval->runtime.bb->flag & BOUNDBOX_DIRTY)) {
+          float cent[3];
+
+          BKE_boundbox_calc_center_aabb(ob_eval->runtime.bb, cent);
+
+          mul_m4_v3(ob_eval->obmat, cent);
+          add_v3_v3(select_center, cent);
+        }
+        else {
+          add_v3_v3(select_center, ob_eval->obmat[3]);
+        }
+        tot++;
+      }
+    }
+    if (tot) {
+      mul_v3_fl(select_center, 1.0f / (float)tot);
+      copy_v3_v3(lastofs, select_center);
+      is_set = true;
+    }
+  }
+  else {
+    /* If there's no selection, lastofs is unmodified and last value since static */
+    is_set = calculateTransformCenter(C, V3D_AROUND_CENTER_MEDIAN, lastofs, NULL);
+  }
+
+  copy_v3_v3(r_dyn_ofs, lastofs);
+
+  return is_set;
+}
+
+static enum eViewOpsFlag viewops_flag_from_args(bool use_select, bool use_depth)
+{
+  enum eViewOpsFlag flag = 0;
+  if (use_select) {
+    flag |= VIEWOPS_FLAG_ORBIT_SELECT;
+  }
+  if (use_depth) {
+    flag |= VIEWOPS_FLAG_DEPTH_NAVIGATE;
+  }
+
+  return flag;
+}
+
+enum eViewOpsFlag viewops_flag_from_prefs(void)
+{
+  return viewops_flag_from_args((U.uiflag & USER_ORBIT_SELECTION) != 0,
+                                (U.uiflag & USER_DEPTH_NAVIGATE) != 0);
+}
+
+void viewops_data_create(bContext *C,
+                         wmOperator *op,
+                         const wmEvent *event,
+                         enum eViewOpsFlag viewops_flag)
+{
+  Depsgraph *depsgraph = CTX_data_ensure_evaluated_depsgraph(C);
+  ViewOpsData *vod = op->customdata;
+  RegionView3D *rv3d = vod->rv3d;
+
+  /* Could do this more nicely. */
+  if ((viewops_flag & VIEWOPS_FLAG_USE_MOUSE_INIT) == 0) {
+    viewops_flag &= ~VIEWOPS_FLAG_DEPTH_NAVIGATE;
+  }
+
+  /* we need the depth info before changing any viewport options */
+  if (viewops_flag & VIEWOPS_FLAG_DEPTH_NAVIGATE) {
+    float fallback_depth_pt[3];
+
+    view3d_operator_needs_opengl(C); /* needed for zbuf drawing */
+
+    negate_v3_v3(fallback_depth_pt, rv3d->ofs);
+
+    vod->use_dyn_ofs = ED_view3d_autodist(
+        depsgraph, vod->region, vod->v3d, event->mval, vod->dyn_ofs, true, fallback_depth_pt);
+  }
+  else {
+    vod->use_dyn_ofs = false;
+  }
+
+  if (viewops_flag & VIEWOPS_FLAG_PERSP_ENSURE) {
+    if (ED_view3d_persp_ensure(depsgraph, vod->v3d, vod->region)) {
+      /* If we're switching from camera view to the perspective one,
+       * need to tag viewport update, so camera view and borders are properly updated. */
+      ED_region_tag_redraw(vod->region);
+    }
+  }
+
+  /* set the view from the camera, if view locking is enabled.
+   * we may want to make this optional but for now its needed always */
+  ED_view3d_camera_lock_init(depsgraph, vod->v3d, vod->rv3d);
+
+  vod->init.persp = rv3d->persp;
+  vod->init.dist = rv3d->dist;
+  vod->init.camzoom = rv3d->camzoom;
+  copy_qt_qt(vod->init.quat, rv3d->viewquat);
+  copy_v2_v2_int(vod->init.event_xy, event->xy);
+  copy_v2_v2_int(vod->prev.event_xy, event->xy);
+
+  if (viewops_flag & VIEWOPS_FLAG_USE_MOUSE_INIT) {
+    zero_v2_int(vod->init.event_xy_offset);
+  }
+  else {
+    /* Simulate the event starting in the middle of the region. */
+    vod->init.event_xy_offset[0] = BLI_rcti_cent_x(&vod->region->winrct) - event->xy[0];
+    vod->init.event_xy_offset[1] = BLI_rcti_cent_y(&vod->region->winrct) - event->xy[1];
+  }
+
+  vod->init.event_type = event->type;
+  copy_v3_v3(vod->init.ofs, rv3d->ofs);
+
+  copy_qt_qt(vod->curr.viewquat, rv3d->viewquat);
+
+  if (viewops_flag & VIEWOPS_FLAG_ORBIT_SELECT) {
+    float ofs[3];
+    if (view3d_orbit_calc_center(C, ofs) || (vod->use_dyn_ofs == false)) {
+      vod->use_dyn_ofs = true;
+      negate_v3_v3(vod->dyn_ofs, ofs);
+      viewops_flag &= ~VIEWOPS_FLAG_DEPTH_NAVIGATE;
+    }
+  }
+
+  if (viewops_flag & VIEWOPS_FLAG_DEPTH_NAVIGATE) {
+    if (vod->use_dyn_ofs) {
+      if (rv3d->is_persp) {
+        float my_origin[3]; /* original G.vd->ofs */
+        float my_pivot[3];  /* view */
+        float dvec[3];
+
+        /* locals for dist correction */
+        float mat[3][3];
+        float upvec[3];
+
+        negate_v3_v3(my_origin, rv3d->ofs); /* ofs is flipped */
+
+        /* Set the dist value to be the distance from this 3d point this means you'll
+         * always be able to zoom into it and panning won't go bad when dist was zero. */
+
+        /* remove dist value */
+        upvec[0] = upvec[1] = 0;
+        upvec[2] = rv3d->dist;
+        copy_m3_m4(mat, rv3d->viewinv);
+
+        mul_m3_v3(mat, upvec);
+        sub_v3_v3v3(my_pivot, rv3d->ofs, upvec);
+        negate_v3(my_pivot); /* ofs is flipped */
+
+        /* find a new ofs value that is along the view axis
+         * (rather than the mouse location) */
+        closest_to_line_v3(dvec, vod->dyn_ofs, my_pivot, my_origin);
+        vod->init.dist = rv3d->dist = len_v3v3(my_pivot, dvec);
+
+        negate_v3_v3(rv3d->ofs, dvec);
+      }
+      else {
+        const float mval_region_mid[2] = {(float)vod->region->winx / 2.0f,
+                                          (float)vod->region->winy / 2.0f};
+
+        ED_view3d_win_to_3d(vod->v3d, vod->region, vod->dyn_ofs, mval_region_mid, rv3d->ofs);
+        negate_v3(rv3d->ofs);
+      }
+      negate_v3(vod->dyn_ofs);
+      copy_v3_v3(vod->init.ofs, rv3d->ofs);
+    }
+  }
+
+  /* For dolly */
+  ED_view3d_win_to_vector(vod->region, (const float[2]){UNPACK2(event->mval)}, vod->init.mousevec);
+
+  {
+    int event_xy_offset[2];
+    add_v2_v2v2_int(event_xy_offset, event->xy, vod->init.event_xy_offset);
+
+    /* For rotation with trackball rotation. */
+    calctrackballvec(&vod->region->winrct, event_xy_offset, vod->init.trackvec);
+  }
+
+  {
+    float tvec[3];
+    negate_v3_v3(tvec, rv3d->ofs);
+    vod->init.zfac = ED_view3d_calc_zfac(rv3d, tvec, NULL);
+  }
+
+  vod->reverse = 1.0f;
+  if (rv3d->persmat[2][1] < 0.0f) {
+    vod->reverse = -1.0f;
+  }
+
+  rv3d->rflag |= RV3D_NAVIGATING;
+}
+
+void viewops_data_free(bContext *C, wmOperator *op)
+{
+  ARegion *region;
+  if (op->customdata) {
+    ViewOpsData *vod = op->customdata;
+    region = vod->region;
+    vod->rv3d->rflag &= ~RV3D_NAVIGATING;
+
+    if (vod->timer) {
+      WM_event_remove_timer(CTX_wm_manager(C), vod->timer->win, vod->timer);
+    }
+
+    if (vod->init.dial) {
+      MEM_freeN(vod->init.dial);
+    }
+
+    MEM_freeN(vod);
+    op->customdata = NULL;
+  }
+  else {
+    region = CTX_wm_region(C);
+  }
+
+  /* Need to redraw because drawing code uses RV3D_NAVIGATING to draw
+   * faster while navigation operator runs. */
+  ED_region_tag_redraw(region);
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name Generic View Operator Utilities
+ * \{ */
+
+/**
+ * \param align_to_quat: When not NULL, set the axis relative to this rotation.
+ */
+static void axis_set_view(bContext *C,
+                          View3D *v3d,
+                          ARegion *region,
+                          const float quat_[4],
+                          char view,
+                          char view_axis_roll,
+                          int perspo,
+                          const float *align_to_quat,
+                          const int smooth_viewtx)
+{
+  RegionView3D *rv3d = region->regiondata; /* no NULL check is needed, poll checks */
+  float quat[4];
+  const short orig_persp = rv3d->persp;
+
+  normalize_qt_qt(quat, quat_);
+
+  if (align_to_quat) {
+    mul_qt_qtqt(quat, quat, align_to_quat);
+    rv3d->view = view = RV3D_VIEW_USER;
+    rv3d->view_axis_roll = RV3D_VIEW_AXIS_ROLL_0;
+  }
+
+  if (align_to_quat == NULL) {
+    rv3d->view = view;
+    rv3d->view_axis_roll = view_axis_roll;
+  }
+
+  if (RV3D_LOCK_FLAGS(rv3d) & RV3D_LOCK_ROTATION) {
+    ED_region_tag_redraw(region);
+    return;
+  }
+
+  if (U.uiflag & USER_AUTOPERSP) {
+    rv3d->persp = RV3D_VIEW_IS_AXIS(view) ? RV3D_ORTHO : perspo;
+  }
+  else if (rv3d->persp == RV3D_CAMOB) {
+    rv3d->persp = perspo;
+  }
+
+  if (rv3d->persp == RV3D_CAMOB && v3d->camera) {
+    /* to camera */
+    ED_view3d_smooth_view(C,
+                          v3d,
+                          region,
+                          smooth_viewtx,
+                          &(const V3D_SmoothParams){
+                              .camera_old = v3d->camera,
+                              .ofs = rv3d->ofs,
+                              .quat = quat,
+                          });
+  }
+  else if (orig_persp == RV3D_CAMOB && v3d->camera) {
+    /* from camera */
+    float ofs[3], dist;
+
+    copy_v3_v3(ofs, rv3d->ofs);
+    dist = rv3d->dist;
+
+    /* so we animate _from_ the camera location */
+    Object *camera_eval = DEG_get_evaluated_object(CTX_data_ensure_evaluated_depsgraph(C),
+                                                   v3d->camera);
+    ED_view3d_from_object(camera_eval, rv3d->ofs, NULL, &rv3d->dist, NULL);
+
+    ED_view3d_smooth_view(C,
+                          v3d,
+                          region,
+                          smooth_viewtx,
+                          &(const V3D_SmoothParams){
+                              .camera_old = camera_eval,
+                              .ofs = ofs,
+                              .quat = quat,
+                              .dist = &dist,
+                          });
+  }
+  else {
+    /* rotate around selection */
+    const float *dyn_ofs_pt = NULL;
+    float dyn_ofs[3];
+
+    if (U.uiflag & USER_ORBIT_SELECTION) {
+      if (view3d_orbit_calc_center(C, dyn_ofs)) {
+        negate_v3(dyn_ofs);
+        dyn_ofs_pt = dyn_ofs;
+      }
+    }
+
+    /* no camera involved */
+    ED_view3d_smooth_view(C,
+                          v3d,
+                          region,
+                          smooth_viewtx,
+                          &(const V3D_SmoothParams){
+                              .quat = quat,
+                              .dyn_ofs = dyn_ofs_pt,
+                          });
+  }
+}
+
+void viewmove_apply(ViewOpsData *vod, int x, int y)
+{
+  if (ED_view3d_offset_lock_check(vod->v3d, vod->rv3d)) {
+    vod->rv3d->ofs_lock[0] -= ((vod->prev.event_xy[0] - x) * 2.0f) / (float)vod->region->winx;
+    vod->rv3d->ofs_lock[1] -= ((vod->prev.event_xy[1] - y) * 2.0f) / (float)vod->region->winy;
+  }
+  else if ((vod->rv3d->persp == RV3D_CAMOB) && !ED_view3d_camera_lock_check(vod->v3d, vod->rv3d)) {
+    const float zoomfac = BKE_screen_view3d_zoom_to_fac(vod->rv3d->camzoom) * 2.0f;
+    vod->rv3d->camdx += (vod->prev.event_xy[0] - x) / (vod->region->winx * zoomfac);
+    vod->rv3d->camdy += (vod->prev.event_xy[1] - y) / (vod->region->winy * zoomfac);
+    CLAMP(vod->rv3d->camdx, -1.0f, 1.0f);
+    CLAMP(vod->rv3d->camdy, -1.0f, 1.0f);
+  }
+  else {
+    float dvec[3];
+    float mval_f[2];
+
+    mval_f[0] = x - vod->prev.event_xy[0];
+    mval_f[1] = y - vod->prev.event_xy[1];
+    ED_view3d_win_to_delta(vod->region, mval_f, dvec, vod->init.zfac);
+
+    add_v3_v3(vod->rv3d->ofs, dvec);
+
+    if (RV3D_LOCK_FLAGS(vod->rv3d) & RV3D_BOXVIEW) {
+      view3d_boxview_sync(vod->area, vod->region);
+    }
+  }
+
+  vod->prev.event_xy[0] = x;
+  vod->prev.event_xy[1] = y;
+
+  ED_view3d_camera_lock_sync(vod->depsgraph, vod->v3d, vod->rv3d);
+
+  ED_region_tag_redraw(vod->region);
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name View All Operator
+ *
+ * Move & Zoom the view to fit all of its contents.
+ * \{ */
+
+static bool view3d_object_skip_minmax(const View3D *v3d,
+                                      const RegionView3D *rv3d,
+                                      const Object *ob,
+                                      const bool skip_camera,
+                                      bool *r_only_center)
+{
+  BLI_assert(ob->id.orig_id == NULL);
+  *r_only_center = false;
+
+  if (skip_camera && (ob == v3d->camera)) {
+    return true;
+  }
+
+  if ((ob->type == OB_EMPTY) && (ob->empty_drawtype == OB_EMPTY_IMAGE) &&
+      !BKE_object_empty_image_frame_is_visible_in_view3d(ob, rv3d)) {
+    *r_only_center = true;
+    return false;
+  }
+
+  return false;
+}
+
+static void view3d_object_calc_minmax(Depsgraph *depsgraph,
+                                      Scene *scene,
+                                      Object *ob_eval,
+                                      const bool only_center,
+                                      float min[3],
+                                      float max[3])
+{
+  /* Account for duplis. */
+  if (BKE_object_minmax_dupli(depsgraph, scene, ob_eval, min, max, false) == 0) {
+    /* Use if duplis aren't found. */
+    if (only_center) {
+      minmax_v3v3_v3(min, max, ob_eval->obmat[3]);
+    }
+    else {
+      BKE_object_minmax(ob_eval, min, max, false);
+    }
+  }
+}
+
+static void view3d_from_minmax(bContext *C,
+                               View3D *v3d,
+                               ARegion *region,
+                               const float min[3],
+                               const float max[3],
+                               bool ok_dist,
+                               const int smooth_viewtx)
+{
+  RegionView3D *rv3d = region->regiondata;
+  float afm[3];
+  float size;
+
+  ED_view3d_smooth_view_force_finish(C, v3d, region);
+
+  /* SMOOTHVIEW */
+  float new_ofs[3];
+  float new_dist;
+
+  sub_v3_v3v3(afm, max, min);
+  size = max_fff(afm[0], afm[1], afm[2]);
+
+  if (ok_dist) {
+    char persp;
+
+    if (rv3d->is_persp) {
+      if (rv3d->persp == RV3D_CAMOB && ED_view3d_camera_lock_check(v3d, rv3d)) {
+        persp = RV3D_CAMOB;
+      }
+      else {
+        persp = RV3D_PERSP;
+      }
+    }
+    else { /* ortho */
+      if (size < 0.0001f) {
+        /* bounding box was a single point so do not zoom */
+        ok_dist = false;
+      }
+      else {
+        /* adjust zoom so it looks nicer */
+        persp = RV3D_ORTHO;
+      }
+    }
+
+    if (ok_dist) {
+      Depsgraph *depsgraph = CTX_data_ensure_evaluated_depsgraph(C);
+      new_dist = ED_view3d_radius_to_dist(
+          v3d, region, depsgraph, persp, true, (size / 2) * VIEW3D_MARGIN);
+      if (rv3d->is_persp) {
+        /* don't zoom closer than the near clipping plane */
+        new_dist = max_ff(new_dist, v3d->clip_start * 1.5f);
+      }
+    }
+  }
+
+  mid_v3_v3v3(new_ofs, min, max);
+  negate_v3(new_ofs);
+
+  if (rv3d->persp == RV3D_CAMOB && !ED_view3d_camera_lock_check(v3d, rv3d)) {
+    rv3d->persp = RV3D_PERSP;
+    ED_view3d_smooth_view(C,
+                          v3d,
+                          region,
+                          smooth_viewtx,
+                          &(const V3D_SmoothParams){
+                              .camera_old = v3d->camera,
+                              .ofs = new_ofs,
+                              .dist = ok_dist ? &new_dist : NULL,
+                          });
+  }
+  else {
+    ED_view3d_smooth_view(C,
+                          v3d,
+                          region,
+                          smooth_viewtx,
+                          &(const V3D_SmoothParams){
+                              .ofs = new_ofs,
+                              .dist = ok_dist ? &new_dist : NULL,
+                          });
+  }
+
+  /* Smooth-view does view-lock #RV3D_BOXVIEW copy. */
+}
+
+/**
+ * Same as #view3d_from_minmax but for all regions (except cameras).
+ */
+static void view3d_from_minmax_multi(bContext *C,
+                                     View3D *v3d,
+                                     const float min[3],
+                                     const float max[3],
+                                     const bool ok_dist,
+                                     const int smooth_viewtx)
+{
+  ScrArea *area = CTX_wm_area(C);
+  ARegion *region;
+  for (region = area->regionbase.first; region; region = region->next) {
+    if (region->regiontype == RGN_TYPE_WINDOW) {
+      RegionView3D *rv3d = region->regiondata;
+      /* when using all regions, don't jump out of camera view,
+       * but _do_ allow locked cameras to be moved */
+      if ((rv3d->persp != RV3D_CAMOB) || ED_view3d_camera_lock_check(v3d, rv3d)) {
+        view3d_from_minmax(C, v3d, region, min, max, ok_dist, smooth_viewtx);
+      }
+    }
+  }
+}
+
+static int view3d_all_exec(bContext *C, wmOperator *op)
+{
+  ARegion *region = CTX_wm_region(C);
+  View3D *v3d = CTX_wm_view3d(C);
+  RegionView3D *rv3d = CTX_wm_region_view3d(C);
+  Scene *scene = CTX_data_scene(C);
+  Depsgraph *depsgraph = CTX_data_ensure_evaluated_depsgraph(C);
+  ViewLayer *view_layer_eval = DEG_get_evaluated_view_layer(depsgraph);
+  Base *base_eval;
+  const bool use_all_regions = RNA_boolean_get(op->ptr, "use_all_regions");
+  const bool skip_camera = (ED_view3d_camera_lock_check(v3d, region->regiondata) ||
+                            /* any one of the regions may be locked */
+                            (use_all_regions && v3d->flag2 & V3D_LOCK_CAMERA));
+  const bool center = RNA_boolean_get(op->ptr, "center");
+  const int smooth_viewtx = WM_operator_smooth_viewtx_get(op);
+
+  float min[3], max[3];
+  bool changed = false;
+
+  if (center) {
+    /* in 2.4x this also move the cursor to (0, 0, 0) (with shift+c). */
+    View3DCursor *cursor = &scene->cursor;
+    zero_v3(min);
+    zero_v3(max);
+    zero_v3(cursor->location);
+    float mat3[3][3];
+    unit_m3(mat3);
+    BKE_scene_cursor_mat3_to_rot(cursor, mat3, false);
+  }
+  else {
+    INIT_MINMAX(min, max);
+  }
+
+  for (base_eval = view_layer_eval->object_bases.first; base_eval; base_eval = base_eval->next) {
+    if (BASE_VISIBLE(v3d, base_eval)) {
+      bool only_center = false;
+      Object *ob = DEG_get_original_object(base_eval->object);
+      if (view3d_object_skip_minmax(v3d, rv3d, ob, skip_camera, &only_center)) {
+        continue;
+      }
+      view3d_object_calc_minmax(depsgraph, scene, base_eval->object, only_center, min, max);
+      changed = true;
+    }
+  }
+
+  if (center) {
+    struct wmMsgBus *mbus = CTX_wm_message_bus(C);
+    WM_msg_publish_rna_prop(mbus, &scene->id, &scene->cursor, View3DCursor, location);
+
+    DEG_id_tag_update(&scene->id, ID_RECALC_COPY_ON_WRITE);
+  }
+
+  if (!changed) {
+    ED_region_tag_redraw(region);
+    /* TODO: should this be cancel?
+     * I think no, because we always move the cursor, with or without
+     * object, but in this case there is no change in the scene,
+     * only the cursor so I choice a ED_region_tag like
+     * view3d_smooth_view do for the center_cursor.
+     * See bug T22640.
+     */
+    return OPERATOR_FINISHED;
+  }
+
+  if (RV3D_CLIPPING_ENABLED(v3d, rv3d)) {
+    /* This is an approximation, see function documentation for details. */
+    ED_view3d_clipping_clamp_minmax(rv3d, min, max);
+  }
+
+  if (use_all_regions) {
+    view3d_from_minmax_multi(C, v3d, min, max, true, smooth_viewtx);
+  }
+  else {
+    view3d_from_minmax(C, v3d, region, min, max, true, smooth_viewtx);
+  }
+
+  return OPERATOR_FINISHED;
+}
+
+void VIEW3D_OT_view_all(wmOperatorType *ot)
+{
+  /* identifiers */
+  ot->name = "Frame All";
+  ot->description = "View all objects in scene";
+  ot->idname = "VIEW3D_OT_view_all";
+
+  /* api callbacks */
+  ot->exec = view3d_all_exec;
+  ot->poll = ED_operator_region_view3d_active;
+
+  /* flags */
+  ot->flag = 0;
+
+  /* properties */
+  view3d_operator_properties_common(ot, V3D_OP_PROP_USE_ALL_REGIONS);
+  RNA_def_boolean(ot->srna, "center", 0, "Center", "");
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name Frame Selected Operator
+ *
+ * Move & Zoom the view to fit selected contents.
+ * \{ */
+
+static int viewselected_exec(bContext *C, wmOperator *op)
+{
+  ARegion *region = CTX_wm_region(C);
+  View3D *v3d = CTX_wm_view3d(C);
+  RegionView3D *rv3d = CTX_wm_region_view3d(C);
+  Scene *scene = CTX_data_scene(C);
+  Depsgraph *depsgraph = CTX_data_ensure_evaluated_depsgraph(C);
+  ViewLayer *view_layer_eval = DEG_get_evaluated_view_layer(depsgraph);
+  Object *ob_eval = OBACT(view_layer_eval);
+  Object *obedit = CTX_data_edit_object(C);
+  const bGPdata *gpd_eval = ob_eval && (ob_eval->type == OB_GPENCIL) ? ob_eval->data : NULL;
+  const bool is_gp_edit = gpd_eval ? GPENCIL_ANY_MODE(gpd_eval) : false;
+  const bool is_face_map = ((is_gp_edit == false) && region->gizmo_map &&
+                            WM_gizmomap_is_any_selected(region->gizmo_map));
+  float min[3], max[3];
+  bool ok = false, ok_dist = true;
+  const bool use_all_regions = RNA_boolean_get(op->ptr, "use_all_regions");
+  const bool skip_camera = (ED_view3d_camera_lock_check(v3d, region->regiondata) ||
+                            /* any one of the regions may be locked */
+                            (use_all_regions && v3d->flag2 & V3D_LOCK_CAMERA));
+  const int smooth_viewtx = WM_operator_smooth_viewtx_get(op);
+
+  INIT_MINMAX(min, max);
+  if (is_face_map) {
+    ob_eval = NULL;
+  }
+
+  if (ob_eval && (ob_eval->mode & OB_MODE_WEIGHT_PAINT)) {
+    /* hard-coded exception, we look for the one selected armature */
+    /* this is weak code this way, we should make a generic
+     * active/selection callback interface once... */
+    Base *base_eval;
+    for (base_eval = view_layer_eval->object_bases.first; base_eval; base_eval = base_eval->next) {
+      if (BASE_SELECTED_EDITABLE(v3d, base_eval)) {
+        if (base_eval->object->type == OB_ARMATURE) {
+          if (base_eval->object->mode & OB_MODE_POSE) {
+            break;
+          }
+        }
+      }
+    }
+    if (base_eval) {
+      ob_eval = base_eval->object;
+    }
+  }
+
+  if (is_gp_edit) {
+    CTX_DATA_BEGIN (C, bGPDstroke *, gps, editable_gpencil_strokes) {
+      /* we're only interested in selected points here... */
+      if ((gps->flag & GP_STROKE_SELECT) && (gps->flag & GP_STROKE_3DSPACE)) {
+        ok |= BKE_gpencil_stroke_minmax(gps, true, min, max);
+      }
+      if (gps->editcurve != NULL) {
+        for (int i = 0; i < gps->editcurve->tot_curve_points; i++) {
+          BezTriple *bezt = &gps->editcurve->curve_points[i].bezt;
+          if ((bezt->f1 & SELECT)) {
+            minmax_v3v3_v3(min, max, bezt->vec[0]);
+            ok = true;
+          }
+          if ((bezt->f2 & SELECT)) {
+            minmax_v3v3_v3(min, max, bezt->vec[1]);
+            ok = true;
+          }
+          if ((bezt->f3 & SELECT)) {
+            minmax_v3v3_v3(min, max, bezt->vec[2]);
+            ok = true;
+          }
+        }
+      }
+    }
+    CTX_DATA_END;
+
+    if ((ob_eval) && (ok)) {
+      mul_m4_v3(ob_eval->obmat, min);
+      mul_m4_v3(ob_eval->obmat, max);
+    }
+  }
+  else if (is_face_map) {
+    ok = WM_gizmomap_minmax(region->gizmo_map, true, true, min, max);
+  }
+  else if (obedit) {
+    /* only selected */
+    FOREACH_OBJECT_IN_MODE_BEGIN (view_layer_eval, v3d, obedit->type, obedit->mode, ob_eval_iter) {
+      ok |= ED_view3d_minmax_verts(ob_eval_iter, min, max);
+    }
+    FOREACH_OBJECT_IN_MODE_END;
+  }
+  else if (ob_eval && (ob_eval->mode & OB_MODE_POSE)) {
+    FOREACH_OBJECT_IN_MODE_BEGIN (
+        view_layer_eval, v3d, ob_eval->type, ob_eval->mode, ob_eval_iter) {
+      ok |= BKE_pose_minmax(ob_eval_iter, min, max, true, true);
+    }
+    FOREACH_OBJECT_IN_MODE_END;
+  }
+  else if (BKE_paint_select_face_test(ob_eval)) {
+    ok = paintface_minmax(ob_eval, min, max);
+  }
+  else if (ob_eval && (ob_eval->mode & OB_MODE_PARTICLE_EDIT)) {
+    ok = PE_minmax(depsgraph, scene, CTX_data_view_layer(C), min, max);
+  }
+  else if (ob_eval && (ob_eval->mode & (OB_MODE_SCULPT | OB_MODE_VERTEX_PAINT |
+                                        OB_MODE_WEIGHT_PAINT | OB_MODE_TEXTURE_PAINT))) {
+    BKE_paint_stroke_get_average(scene, ob_eval, min);
+    copy_v3_v3(max, min);
+    ok = true;
+    ok_dist = 0; /* don't zoom */
+  }
+  else {
+    Base *base_eval;
+    for (base_eval = FIRSTBASE(view_layer_eval); base_eval; base_eval = base_eval->next) {
+      if (BASE_SELECTED(v3d, base_eval)) {
+        bool only_center = false;
+        Object *ob = DEG_get_original_object(base_eval->object);
+        if (view3d_object_skip_minmax(v3d, rv3d, ob, skip_camera, &only_center)) {
+          continue;
+        }
+        view3d_object_calc_minmax(depsgraph, scene, base_eval->object, only_center, min, max);
+        ok = 1;
+      }
+    }
+  }
+
+  if (ok == 0) {
+    return OPERATOR_FINISHED;
+  }
+
+  if (RV3D_CLIPPING_ENABLED(v3d, rv3d)) {
+    /* This is an approximation, see function documentation for details. */
+    ED_view3d_clipping_clamp_minmax(rv3d, min, max);
+  }
+
+  if (use_all_regions) {
+    view3d_from_minmax_multi(C, v3d, min, max, ok_dist, smooth_viewtx);
+  }
+  else {
+    view3d_from_minmax(C, v3d, region, min, max, ok_dist, smooth_viewtx);
+  }
+
+  return OPERATOR_FINISHED;
+}
+
+void VIEW3D_OT_view_selected(wmOperatorType *ot)
+{
+  /* identifiers */
+  ot->name = "Frame Selected";
+  ot->description = "Move the view to the selection center";
+  ot->idname = "VIEW3D_OT_view_selected";
+
+  /* api callbacks */
+  ot->exec = viewselected_exec;
+  ot->poll = view3d_zoom_or_dolly_poll;
+
+  /* flags */
+  ot->flag = 0;
+
+  /* properties */
+  view3d_operator_properties_common(ot, V3D_OP_PROP_USE_ALL_REGIONS);
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name View Center Cursor Operator
+ * \{ */
+
+static int viewcenter_cursor_exec(bContext *C, wmOperator *op)
+{
+  View3D *v3d = CTX_wm_view3d(C);
+  RegionView3D *rv3d = CTX_wm_region_view3d(C);
+  Scene *scene = CTX_data_scene(C);
+
+  if (rv3d) {
+    ARegion *region = CTX_wm_region(C);
+    const int smooth_viewtx = WM_operator_smooth_viewtx_get(op);
+
+    ED_view3d_smooth_view_force_finish(C, v3d, region);
+
+    /* non camera center */
+    float new_ofs[3];
+    negate_v3_v3(new_ofs, scene->cursor.location);
+    ED_view3d_smooth_view(
+        C, v3d, region, smooth_viewtx, &(const V3D_SmoothParams){.ofs = new_ofs});
+
+    /* Smooth view does view-lock #RV3D_BOXVIEW copy. */
+  }
+
+  return OPERATOR_FINISHED;
+}
+
+void VIEW3D_OT_view_center_cursor(wmOperatorType *ot)
+{
+  /* identifiers */
+  ot->name = "Center View to Cursor";
+  ot->description = "Center the view so that the cursor is in the middle of the view";
+  ot->idname = "VIEW3D_OT_view_center_cursor";
+
+  /* api callbacks */
+  ot->exec = viewcenter_cursor_exec;
+  ot->poll = view3d_pan_poll;
+
+  /* flags */
+  ot->flag = 0;
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name View Center Pick Operator
+ * \{ */
+
+static int viewcenter_pick_invoke(bContext *C, wmOperator *op, const wmEvent *event)
+{
+  View3D *v3d = CTX_wm_view3d(C);
+  RegionView3D *rv3d = CTX_wm_region_view3d(C);
+  ARegion *region = CTX_wm_region(C);
+
+  if (rv3d) {
+    struct Depsgraph *depsgraph = CTX_data_ensure_evaluated_depsgraph(C);
+    float new_ofs[3];
+    const int smooth_viewtx = WM_operator_smooth_viewtx_get(op);
+
+    ED_view3d_smooth_view_force_finish(C, v3d, region);
+
+    view3d_operator_needs_opengl(C);
+
+    if (ED_view3d_autodist(depsgraph, region, v3d, event->mval, new_ofs, false, NULL)) {
+      /* pass */
+    }
+    else {
+      /* fallback to simple pan */
+      negate_v3_v3(new_ofs, rv3d->ofs);
+      ED_view3d_win_to_3d_int(v3d, region, new_ofs, event->mval, new_ofs);
+    }
+    negate_v3(new_ofs);
+    ED_view3d_smooth_view(
+        C, v3d, region, smooth_viewtx, &(const V3D_SmoothParams){.ofs = new_ofs});
+  }
+
+  return OPERATOR_FINISHED;
+}
+
+void VIEW3D_OT_view_center_pick(wmOperatorType *ot)
+{
+  /* identifiers */
+  ot->name = "Center View to Mouse";
+  ot->description = "Center the view to the Z-depth position under the mouse cursor";
+  ot->idname = "VIEW3D_OT_view_center_pick";
+
+  /* api callbacks */
+  ot->invoke = viewcenter_pick_invoke;
+  ot->poll = view3d_pan_poll;
+
+  /* flags */
+  ot->flag = 0;
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name View Axis Operator
+ * \{ */
+
+static const EnumPropertyItem prop_view_items[] = {
+    {RV3D_VIEW_LEFT, "LEFT", ICON_TRIA_LEFT, "Left", "View from the left"},
+    {RV3D_VIEW_RIGHT, "RIGHT", ICON_TRIA_RIGHT, "Right", "View from the right"},
+    {RV3D_VIEW_BOTTOM, "BOTTOM", ICON_TRIA_DOWN, "Bottom", "View from the bottom"},
+    {RV3D_VIEW_TOP, "TOP", ICON_TRIA_UP, "Top", "View from the top"},
+    {RV3D_VIEW_FRONT, "FRONT", 0, "Front", "View from the front"},
+    {RV3D_VIEW_BACK, "BACK", 0, "Back", "View from the back"},
+    {0, NULL, 0, NULL, NULL},
+};
+
+static int view_axis_exec(bContext *C, wmOperator *op)
+{
+  View3D *v3d;
+  ARegion *region;
+  RegionView3D *rv3d;
+  static int perspo = RV3D_PERSP;
+  int viewnum;
+  int view_axis_roll = RV3D_VIEW_AXIS_ROLL_0;
+  const int smooth_viewtx = WM_operator_smooth_viewtx_get(op);
+
+  /* no NULL check is needed, poll checks */
+  ED_view3d_context_user_region(C, &v3d, &region);
+  rv3d = region->regiondata;
+
+  ED_view3d_smooth_view_force_finish(C, v3d, region);
+
+  viewnum = RNA_enum_get(op->ptr, "type");
+
+  float align_quat_buf[4];
+  float *align_quat = NULL;
+
+  if (RNA_boolean_get(op->ptr, "align_active")) {
+    /* align to active object */
+    Object *obact = CTX_data_active_object(C);
+    if (obact != NULL) {
+      float twmat[3][3];
+      struct ViewLayer *view_layer = CTX_data_view_layer(C);
+      Object *obedit = CTX_data_edit_object(C);
+      /* same as transform gizmo when normal is set */
+      ED_getTransformOrientationMatrix(view_layer, v3d, obact, obedit, V3D_AROUND_ACTIVE, twmat);
+      align_quat = align_quat_buf;
+      mat3_to_quat(align_quat, twmat);
+      invert_qt_normalized(align_quat);
+    }
+  }
+
+  if (RNA_boolean_get(op->ptr, "relative")) {
+    float quat_rotate[4];
+    float quat_test[4];
+
+    if (viewnum == RV3D_VIEW_LEFT) {
+      axis_angle_to_quat(quat_rotate, rv3d->viewinv[1], -M_PI / 2.0f);
+    }
+    else if (viewnum == RV3D_VIEW_RIGHT) {
+      axis_angle_to_quat(quat_rotate, rv3d->viewinv[1], M_PI / 2.0f);
+    }
+    else if (viewnum == RV3D_VIEW_TOP) {
+      axis_angle_to_quat(quat_rotate, rv3d->viewinv[0], -M_PI / 2.0f);
+    }
+    else if (viewnum == RV3D_VIEW_BOTTOM) {
+      axis_angle_to_quat(quat_rotate, rv3d->viewinv[0], M_PI / 2.0f);
+    }
+    else if (viewnum == RV3D_VIEW_FRONT) {
+      unit_qt(quat_rotate);
+    }
+    else if (viewnum == RV3D_VIEW_BACK) {
+      axis_angle_to_quat(quat_rotate, rv3d->viewinv[0], M_PI);
+    }
+    else {
+      BLI_assert(0);
+    }
+
+    mul_qt_qtqt(quat_test, rv3d->viewquat, quat_rotate);
+
+    float angle_best = FLT_MAX;
+    int view_best = -1;
+    int view_axis_roll_best = -1;
+    for (int i = RV3D_VIEW_FRONT; i <= RV3D_VIEW_BOTTOM; i++) {
+      for (int j = RV3D_VIEW_AXIS_ROLL_0; j <= RV3D_VIEW_AXIS_ROLL_270; j++) {
+        float quat_axis[4];
+        ED_view3d_quat_from_axis_view(i, j, quat_axis);
+        if (align_quat) {
+          mul_qt_qtqt(quat_axis, quat_axis, align_quat);
+        }
+        const float angle_test = fabsf(angle_signed_qtqt(quat_axis, quat_test));
+        if (angle_best > angle_test) {
+          angle_best = angle_test;
+          view_best = i;
+          view_axis_roll_best = j;
+        }
+      }
+    }
+    if (view_best == -1) {
+      view_best = RV3D_VIEW_FRONT;
+      view_axis_roll_best = RV3D_VIEW_AXIS_ROLL_0;
+    }
+
+    /* Disallow non-upright views in turn-table modes,
+     * it's too difficult to navigate out of them. */
+    if ((U.flag & USER_TRACKBALL) == 0) {
+      if (!ELEM(view_best, RV3D_VIEW_TOP, RV3D_VIEW_BOTTOM)) {
+        view_axis_roll_best = RV3D_VIEW_AXIS_ROLL_0;
+      }
+    }
+
+    viewnum = view_best;
+    view_axis_roll = view_axis_roll_best;
+  }
+
+  /* Use this to test if we started out with a camera */
+  const int nextperspo = (rv3d->persp == RV3D_CAMOB) ? rv3d->lpersp : perspo;
+  float quat[4];
+  ED_view3d_quat_from_axis_view(viewnum, view_axis_roll, quat);
+  axis_set_view(
+      C, v3d, region, quat, viewnum, view_axis_roll, nextperspo, align_quat, smooth_viewtx);
+
+  perspo = rv3d->persp;
+
+  return OPERATOR_FINISHED;
+}
+
+void VIEW3D_OT_view_axis(wmOperatorType *ot)
+{
+  PropertyRNA *prop;
+
+  /* identifiers */
+  ot->name = "View Axis";
+  ot->description = "Use a preset viewpoint";
+  ot->idname = "VIEW3D_OT_view_axis";
+
+  /* api callbacks */
+  ot->exec = view_axis_exec;
+  ot->poll = ED_operator_rv3d_user_region_poll;
+
+  /* flags */
+  ot->flag = 0;
+
+  ot->prop = RNA_def_enum(ot->srna, "type", prop_view_items, 0, "View", "Preset viewpoint to use");
+  RNA_def_property_flag(ot->prop, PROP_SKIP_SAVE);
+  prop = RNA_def_boolean(
+      ot->srna, "align_active", 0, "Align Active", "Align to the active object's axis");
+  RNA_def_property_flag(prop, PROP_SKIP_SAVE);
+  prop = RNA_def_boolean(
+      ot->srna, "relative", 0, "Relative", "Rotate relative to the current orientation");
+  RNA_def_property_flag(prop, PROP_SKIP_SAVE);
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name View Camera Operator
+ * \{ */
+
+static int view_camera_exec(bContext *C, wmOperator *op)
+{
+  View3D *v3d;
+  ARegion *region;
+  RegionView3D *rv3d;
+  const int smooth_viewtx = WM_operator_smooth_viewtx_get(op);
+
+  /* no NULL check is needed, poll checks */
+  ED_view3d_context_user_region(C, &v3d, &region);
+  rv3d = region->regiondata;
+
+  ED_view3d_smooth_view_force_finish(C, v3d, region);
+
+  if ((RV3D_LOCK_FLAGS(rv3d) & RV3D_LOCK_ANY_TRANSFORM) == 0) {
+    ViewLayer *view_layer = CTX_data_view_layer(C);
+    Scene *scene = CTX_data_scene(C);
+
+    if (rv3d->persp != RV3D_CAMOB) {
+      Object *ob = OBACT(view_layer);
+
+      if (!rv3d->smooth_timer) {
+        /* store settings of current view before allowing overwriting with camera view
+         * only if we're not currently in a view transition */
+
+        ED_view3d_lastview_store(rv3d);
+      }
+
+      /* first get the default camera for the view lock type */
+      if (v3d->scenelock) {
+        /* sets the camera view if available */
+        v3d->camera = scene->camera;
+      }
+      else {
+        /* use scene camera if one is not set (even though we're unlocked) */
+        if (v3d->camera == NULL) {
+          v3d->camera = scene->camera;
+        }
+      }
+
+      /* if the camera isn't found, check a number of options */
+      if (v3d->camera == NULL && ob && ob->type == OB_CAMERA) {
+        v3d->camera = ob;
+      }
+
+      if (v3d->camera == NULL) {
+        v3d->camera = BKE_view_layer_camera_find(view_layer);
+      }
+
+      /* couldn't find any useful camera, bail out */
+      if (v3d->camera == NULL) {
+        return OPERATOR_CANCELLED;
+      }
+
+      /* important these don't get out of sync for locked scenes */
+      if (v3d->scenelock && scene->camera != v3d->camera) {
+        scene->camera = v3d->camera;
+        DEG_id_tag_update(&scene->id, ID_RECALC_COPY_ON_WRITE);
+      }
+
+      /* finally do snazzy view zooming */
+      rv3d->persp = RV3D_CAMOB;
+      ED_view3d_smooth_view(C,
+                            v3d,
+                            region,
+                            smooth_viewtx,
+                            &(const V3D_SmoothParams){
+                                .camera = v3d->camera,
+                                .ofs = rv3d->ofs,
+                                .quat = rv3d->viewquat,
+                                .dist = &rv3d->dist,
+                                .lens = &v3d->lens,
+                            });
+    }
+    else {
+      /* return to settings of last view */
+      /* does view3d_smooth_view too */
+      axis_set_view(C,
+                    v3d,
+                    region,
+                    rv3d->lviewquat,
+                    rv3d->lview,
+                    rv3d->lview_axis_roll,
+                    rv3d->lpersp,
+                    NULL,
+                    smooth_viewtx);
+    }
+  }
+
+  return OPERATOR_FINISHED;
+}
+
+void VIEW3D_OT_view_camera(wmOperatorType *ot)
+{
+  /* identifiers */
+  ot->name = "View Camera";
+  ot->description = "Toggle the camera view";
+  ot->idname = "VIEW3D_OT_view_camera";
+
+  /* api callbacks */
+  ot->exec = view_camera_exec;
+  ot->poll = ED_operator_rv3d_user_region_poll;
+
+  /* flags */
+  ot->flag = 0;
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name View Orbit Operator
+ *
+ * Rotate (orbit) in incremental steps. For interactive orbit see #VIEW3D_OT_rotate.
+ * \{ */
+
+enum {
+  V3D_VIEW_STEPLEFT = 1,
+  V3D_VIEW_STEPRIGHT,
+  V3D_VIEW_STEPDOWN,
+  V3D_VIEW_STEPUP,
+};
+
+static const EnumPropertyItem prop_view_orbit_items[] = {
+    {V3D_VIEW_STEPLEFT, "ORBITLEFT", 0, "Orbit Left", "Orbit the view around to the left"},
+    {V3D_VIEW_STEPRIGHT, "ORBITRIGHT", 0, "Orbit Right", "Orbit the view around to the right"},
+    {V3D_VIEW_STEPUP, "ORBITUP", 0, "Orbit Up", "Orbit the view up"},
+    {V3D_VIEW_STEPDOWN, "ORBITDOWN", 0, "Orbit Down", "Orbit the view down"},
+    {0, NULL, 0, NULL, NULL},
+};
+
+static int vieworbit_exec(bContext *C, wmOperator *op)
+{
+  View3D *v3d;
+  ARegion *region;
+  RegionView3D *rv3d;
+  int orbitdir;
+  char view_opposite;
+  PropertyRNA *prop_angle = RNA_struct_find_property(op->ptr, "angle");
+  float angle = RNA_property_is_set(op->ptr, prop_angle) ?
+                    RNA_property_float_get(op->ptr, prop_angle) :
+                    DEG2RADF(U.pad_rot_angle);
+
+  /* no NULL check is needed, poll checks */
+  v3d = CTX_wm_view3d(C);
+  region = CTX_wm_region(C);
+  rv3d = region->regiondata;
+
+  /* support for switching to the opposite view (even when in locked views) */
+  view_opposite = (fabsf(angle) == (float)M_PI) ? ED_view3d_axis_view_opposite(rv3d->view) :
+                                                  RV3D_VIEW_USER;
+  orbitdir = RNA_enum_get(op->ptr, "type");
+
+  if ((RV3D_LOCK_FLAGS(rv3d) & RV3D_LOCK_ROTATION) && (view_opposite == RV3D_VIEW_USER)) {
+    /* no NULL check is needed, poll checks */
+    ED_view3d_context_user_region(C, &v3d, &region);
+    rv3d = region->regiondata;
+  }
+
+  ED_view3d_smooth_view_force_finish(C, v3d, region);
+
+  if ((RV3D_LOCK_FLAGS(rv3d) & RV3D_LOCK_ROTATION) == 0 || (view_opposite != RV3D_VIEW_USER)) {
+    if ((rv3d->persp != RV3D_CAMOB) || ED_view3d_camera_lock_check(v3d, rv3d)) {
+      int smooth_viewtx = WM_operator_smooth_viewtx_get(op);
+      float quat_mul[4];
+      float quat_new[4];
+
+      if (view_opposite == RV3D_VIEW_USER) {
+        const Depsgraph *depsgraph = CTX_data_ensure_evaluated_depsgraph(C);
+        ED_view3d_persp_ensure(depsgraph, v3d, region);
+      }
+
+      if (ELEM(orbitdir, V3D_VIEW_STEPLEFT, V3D_VIEW_STEPRIGHT)) {
+        if (orbitdir == V3D_VIEW_STEPRIGHT) {
+          angle = -angle;
+        }
+
+        /* z-axis */
+        axis_angle_to_quat_single(quat_mul, 'Z', angle);
+      }
+      else {
+
+        if (orbitdir == V3D_VIEW_STEPDOWN) {
+          angle = -angle;
+        }
+
+        /* horizontal axis */
+        axis_angle_to_quat(quat_mul, rv3d->viewinv[0], angle);
+      }
+
+      mul_qt_qtqt(quat_new, rv3d->viewquat, quat_mul);
+
+      /* avoid precision loss over time */
+      normalize_qt(quat_new);
+
+      if (view_opposite != RV3D_VIEW_USER) {
+        rv3d->view = view_opposite;
+        /* avoid float in-precision, just get a new orientation */
+        ED_view3d_quat_from_axis_view(view_opposite, rv3d->view_axis_roll, quat_new);
+      }
+      else {
+        rv3d->view = RV3D_VIEW_USER;
+      }
+
+      float dyn_ofs[3], *dyn_ofs_pt = NULL;
+
+      if (U.uiflag & USER_ORBIT_SELECTION) {
+        if (view3d_orbit_calc_center(C, dyn_ofs)) {
+          negate_v3(dyn_ofs);
+          dyn_ofs_pt = dyn_ofs;
+        }
+      }
+
+      ED_view3d_smooth_view(C,
+                            v3d,
+                            region,
+                            smooth_viewtx,
+                            &(const V3D_SmoothParams){
+                                .quat = quat_new,
+                                .dyn_ofs = dyn_ofs_pt,
+                            });
+
+      return OPERATOR_FINISHED;
+    }
+  }
+
+  return OPERATOR_CANCELLED;
+}
+
+void VIEW3D_OT_view_orbit(wmOperatorType *ot)
+{
+  PropertyRNA *prop;
+
+  /* identifiers */
+  ot->name = "View Orbit";
+  ot->description = "Orbit the view";
+  ot->idname = "VIEW3D_OT_view_orbit";
+
+  /* api callbacks */
+  ot->exec = vieworbit_exec;
+  ot->poll = ED_operator_rv3d_user_region_poll;
+
+  /* flags */
+  ot->flag = 0;
+
+  /* properties */
+  prop = RNA_def_float(ot->srna, "angle", 0, -FLT_MAX, FLT_MAX, "Roll", "", -FLT_MAX, FLT_MAX);
+  RNA_def_property_flag(prop, PROP_SKIP_SAVE);
+
+  ot->prop = RNA_def_enum(
+      ot->srna, "type", prop_view_orbit_items, 0, "Orbit", "Direction of View Orbit");
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name View Pan Operator
+ *
+ * Move (pan) in incremental steps. For interactive pan see #VIEW3D_OT_move.
+ * \{ */
+
+enum {
+  V3D_VIEW_PANLEFT = 1,
+  V3D_VIEW_PANRIGHT,
+  V3D_VIEW_PANDOWN,
+  V3D_VIEW_PANUP,
+};
+
+static const EnumPropertyItem prop_view_pan_items[] = {
+    {V3D_VIEW_PANLEFT, "PANLEFT", 0, "Pan Left", "Pan the view to the left"},
+    {V3D_VIEW_PANRIGHT, "PANRIGHT", 0, "Pan Right", "Pan the view to the right"},
+    {V3D_VIEW_PANUP, "PANUP", 0, "Pan Up", "Pan the view up"},
+    {V3D_VIEW_PANDOWN, "PANDOWN", 0, "Pan Down", "Pan the view down"},
+    {0, NULL, 0, NULL, NULL},
+};
+
+static int viewpan_invoke(bContext *C, wmOperator *op, const wmEvent *event)
+{
+  int x = 0, y = 0;
+  int pandir = RNA_enum_get(op->ptr, "type");
+
+  if (pandir == V3D_VIEW_PANRIGHT) {
+    x = -32;
+  }
+  else if (pandir == V3D_VIEW_PANLEFT) {
+    x = 32;
+  }
+  else if (pandir == V3D_VIEW_PANUP) {
+    y = -25;
+  }
+  else if (pandir == V3D_VIEW_PANDOWN) {
+    y = 25;
+  }
+
+  viewops_data_alloc(C, op);
+  viewops_data_create(C, op, event, (viewops_flag_from_prefs() & ~VIEWOPS_FLAG_ORBIT_SELECT));
+  ViewOpsData *vod = op->customdata;
+
+  viewmove_apply(vod, vod->prev.event_xy[0] + x, vod->prev.event_xy[1] + y);
+
+  viewops_data_free(C, op);
+
+  return OPERATOR_FINISHED;
+}
+
+void VIEW3D_OT_view_pan(wmOperatorType *ot)
+{
+  /* identifiers */
+  ot->name = "Pan View Direction";
+  ot->description = "Pan the view in a given direction";
+  ot->idname = "VIEW3D_OT_view_pan";
+
+  /* api callbacks */
+  ot->invoke = viewpan_invoke;
+  ot->poll = view3d_pan_poll;
+
+  /* flags */
+  ot->flag = 0;
+
+  /* Properties */
+  ot->prop = RNA_def_enum(
+      ot->srna, "type", prop_view_pan_items, 0, "Pan", "Direction of View Pan");
+}
+
+/** \} */