Transform: Split transform_conversions into multiple files.

Part of T68836

`transform conversions.c` is a file that is getting too big (almost 10,000 lines).
So it's a good idea to split it into smaller files.

differential revision: https://developer.blender.org/D5677

1 files changed, 422 insertions, 0 deletions

diff --git a/source/blender/editors/transform/transform_convert_curve.c b/source/blender/editors/transform/transform_convert_curve.c
new file mode 100644
index 00000000000..487de27aff2
--- /dev/null
+++ b/source/blender/editors/transform/transform_convert_curve.c
@@ -0,0 +1,422 @@
+/*
+ * 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.
+ *
+ * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
+ * All rights reserved.
+ */
+
+/** \file
+ * \ingroup edtransform
+ */
+
+#include "DNA_curve_types.h"
+
+#include "MEM_guardedalloc.h"
+
+#include "BLI_math.h"
+
+#include "BKE_context.h"
+#include "BKE_curve.h"
+#include "BKE_report.h"
+
+#include "transform.h"
+#include "transform_convert.h"
+
+/* -------------------------------------------------------------------- */
+/** \name Curve/Surfaces Transform Creation
+ *
+ * \{ */
+
+/**
+ * For the purpose of transform code we need to behave as if handles are selected,
+ * even when they aren't (see special case below).
+ */
+static int bezt_select_to_transform_triple_flag(const BezTriple *bezt, const bool hide_handles)
+{
+  int flag = 0;
+
+  if (hide_handles) {
+    if (bezt->f2 & SELECT) {
+      flag = (1 << 0) | (1 << 1) | (1 << 2);
+    }
+  }
+  else {
+    flag = (((bezt->f1 & SELECT) ? (1 << 0) : 0) | ((bezt->f2 & SELECT) ? (1 << 1) : 0) |
+            ((bezt->f3 & SELECT) ? (1 << 2) : 0));
+  }
+
+  /* Special case for auto & aligned handles:
+   * When a center point is being moved without the handles,
+   * leaving the handles stationary makes no sense and only causes strange behavior,
+   * where one handle is arbitrarily anchored, the other one is aligned and lengthened
+   * based on where the center point is moved. Also a bug when cancelling, see: T52007.
+   *
+   * A more 'correct' solution could be to store handle locations in 'TransDataCurveHandleFlags'.
+   * However that doesn't resolve odd behavior, so best transform the handles in this case.
+   */
+  if ((flag != ((1 << 0) | (1 << 1) | (1 << 2))) && (flag & (1 << 1))) {
+    if (ELEM(bezt->h1, HD_AUTO, HD_ALIGN) && ELEM(bezt->h2, HD_AUTO, HD_ALIGN)) {
+      flag = (1 << 0) | (1 << 1) | (1 << 2);
+    }
+  }
+
+  return flag;
+}
+
+void createTransCurveVerts(TransInfo *t)
+{
+
+#define SEL_F1 (1 << 0)
+#define SEL_F2 (1 << 1)
+#define SEL_F3 (1 << 2)
+
+  t->data_len_all = 0;
+
+  FOREACH_TRANS_DATA_CONTAINER (t, tc) {
+    Curve *cu = tc->obedit->data;
+    BLI_assert(cu->editnurb != NULL);
+    BezTriple *bezt;
+    BPoint *bp;
+    int a;
+    int count = 0, countsel = 0;
+    const bool is_prop_edit = (t->flag & T_PROP_EDIT) != 0;
+    View3D *v3d = t->view;
+    short hide_handles = (v3d != NULL) ?
+                             ((v3d->overlay.edit_flag & V3D_OVERLAY_EDIT_CU_HANDLES) == 0) :
+                             false;
+
+    /* count total of vertices, check identical as in 2nd loop for making transdata! */
+    ListBase *nurbs = BKE_curve_editNurbs_get(cu);
+    for (Nurb *nu = nurbs->first; nu; nu = nu->next) {
+      if (nu->type == CU_BEZIER) {
+        for (a = 0, bezt = nu->bezt; a < nu->pntsu; a++, bezt++) {
+          if (bezt->hide == 0) {
+            const int bezt_tx = bezt_select_to_transform_triple_flag(bezt, hide_handles);
+            if (bezt_tx & SEL_F1) {
+              countsel++;
+            }
+            if (bezt_tx & SEL_F2) {
+              countsel++;
+            }
+            if (bezt_tx & SEL_F3) {
+              countsel++;
+            }
+            if (is_prop_edit) {
+              count += 3;
+            }
+          }
+        }
+      }
+      else {
+        for (a = nu->pntsu * nu->pntsv, bp = nu->bp; a > 0; a--, bp++) {
+          if (bp->hide == 0) {
+            if (is_prop_edit) {
+              count++;
+            }
+            if (bp->f1 & SELECT) {
+              countsel++;
+            }
+          }
+        }
+      }
+    }
+    /* note: in prop mode we need at least 1 selected */
+    if (countsel == 0) {
+      tc->data_len = 0;
+      continue;
+    }
+
+    if (is_prop_edit) {
+      tc->data_len = count;
+    }
+    else {
+      tc->data_len = countsel;
+    }
+    tc->data = MEM_callocN(tc->data_len * sizeof(TransData), "TransObData(Curve EditMode)");
+
+    t->data_len_all += tc->data_len;
+  }
+
+  transform_around_single_fallback(t);
+  t->data_len_all = -1;
+
+  FOREACH_TRANS_DATA_CONTAINER (t, tc) {
+    if (tc->data_len == 0) {
+      continue;
+    }
+
+    Curve *cu = tc->obedit->data;
+    BezTriple *bezt;
+    BPoint *bp;
+    int a;
+    const bool is_prop_edit = (t->flag & T_PROP_EDIT) != 0;
+    View3D *v3d = t->view;
+    short hide_handles = (v3d != NULL) ?
+                             ((v3d->overlay.edit_flag & V3D_OVERLAY_EDIT_CU_HANDLES) == 0) :
+                             false;
+
+    float mtx[3][3], smtx[3][3];
+
+    copy_m3_m4(mtx, tc->obedit->obmat);
+    pseudoinverse_m3_m3(smtx, mtx, PSEUDOINVERSE_EPSILON);
+
+    TransData *td = tc->data;
+    ListBase *nurbs = BKE_curve_editNurbs_get(cu);
+    for (Nurb *nu = nurbs->first; nu; nu = nu->next) {
+      if (nu->type == CU_BEZIER) {
+        TransData *head, *tail;
+        head = tail = td;
+        for (a = 0, bezt = nu->bezt; a < nu->pntsu; a++, bezt++) {
+          if (bezt->hide == 0) {
+            TransDataCurveHandleFlags *hdata = NULL;
+            float axismtx[3][3];
+
+            if (t->around == V3D_AROUND_LOCAL_ORIGINS) {
+              float normal[3], plane[3];
+
+              BKE_nurb_bezt_calc_normal(nu, bezt, normal);
+              BKE_nurb_bezt_calc_plane(nu, bezt, plane);
+
+              if (createSpaceNormalTangent(axismtx, normal, plane)) {
+                /* pass */
+              }
+              else {
+                normalize_v3(normal);
+                axis_dominant_v3_to_m3(axismtx, normal);
+                invert_m3(axismtx);
+              }
+            }
+
+            /* Elements that will be transform (not always a match to selection). */
+            const int bezt_tx = bezt_select_to_transform_triple_flag(bezt, hide_handles);
+
+            if (is_prop_edit || bezt_tx & SEL_F1) {
+              copy_v3_v3(td->iloc, bezt->vec[0]);
+              td->loc = bezt->vec[0];
+              copy_v3_v3(td->center,
+                         bezt->vec[(hide_handles || (t->around == V3D_AROUND_LOCAL_ORIGINS) ||
+                                    (bezt->f2 & SELECT)) ?
+                                       1 :
+                                       0]);
+              if (hide_handles) {
+                if (bezt->f2 & SELECT) {
+                  td->flag = TD_SELECTED;
+                }
+                else {
+                  td->flag = 0;
+                }
+              }
+              else {
+                if (bezt->f1 & SELECT) {
+                  td->flag = TD_SELECTED;
+                }
+                else {
+                  td->flag = 0;
+                }
+              }
+              td->ext = NULL;
+              td->val = NULL;
+
+              hdata = initTransDataCurveHandles(td, bezt);
+
+              copy_m3_m3(td->smtx, smtx);
+              copy_m3_m3(td->mtx, mtx);
+              if (t->around == V3D_AROUND_LOCAL_ORIGINS) {
+                copy_m3_m3(td->axismtx, axismtx);
+              }
+
+              td++;
+              tail++;
+            }
+
+            /* This is the Curve Point, the other two are handles */
+            if (is_prop_edit || bezt_tx & SEL_F2) {
+              copy_v3_v3(td->iloc, bezt->vec[1]);
+              td->loc = bezt->vec[1];
+              copy_v3_v3(td->center, td->loc);
+              if (bezt->f2 & SELECT) {
+                td->flag = TD_SELECTED;
+              }
+              else {
+                td->flag = 0;
+              }
+              td->ext = NULL;
+
+              /* TODO - make points scale */
+              if (t->mode == TFM_CURVE_SHRINKFATTEN) { /* || t->mode==TFM_RESIZE) {*/
+                td->val = &(bezt->radius);
+                td->ival = bezt->radius;
+              }
+              else if (t->mode == TFM_TILT) {
+                td->val = &(bezt->tilt);
+                td->ival = bezt->tilt;
+              }
+              else {
+                td->val = NULL;
+              }
+
+              copy_m3_m3(td->smtx, smtx);
+              copy_m3_m3(td->mtx, mtx);
+              if (t->around == V3D_AROUND_LOCAL_ORIGINS) {
+                copy_m3_m3(td->axismtx, axismtx);
+              }
+
+              if ((bezt_tx & SEL_F1) == 0 && (bezt_tx & SEL_F3) == 0) {
+                /* If the middle is selected but the sides arnt, this is needed */
+                if (hdata == NULL) {
+                  /* if the handle was not saved by the previous handle */
+                  hdata = initTransDataCurveHandles(td, bezt);
+                }
+              }
+
+              td++;
+              tail++;
+            }
+            if (is_prop_edit || bezt_tx & SEL_F3) {
+              copy_v3_v3(td->iloc, bezt->vec[2]);
+              td->loc = bezt->vec[2];
+              copy_v3_v3(td->center,
+                         bezt->vec[(hide_handles || (t->around == V3D_AROUND_LOCAL_ORIGINS) ||
+                                    (bezt->f2 & SELECT)) ?
+                                       1 :
+                                       2]);
+              if (hide_handles) {
+                if (bezt->f2 & SELECT) {
+                  td->flag = TD_SELECTED;
+                }
+                else {
+                  td->flag = 0;
+                }
+              }
+              else {
+                if (bezt->f3 & SELECT) {
+                  td->flag = TD_SELECTED;
+                }
+                else {
+                  td->flag = 0;
+                }
+              }
+              td->ext = NULL;
+              td->val = NULL;
+
+              if (hdata == NULL) {
+                /* if the handle was not saved by the previous handle */
+                hdata = initTransDataCurveHandles(td, bezt);
+              }
+
+              copy_m3_m3(td->smtx, smtx);
+              copy_m3_m3(td->mtx, mtx);
+              if (t->around == V3D_AROUND_LOCAL_ORIGINS) {
+                copy_m3_m3(td->axismtx, axismtx);
+              }
+
+              td++;
+              tail++;
+            }
+
+            (void)hdata; /* quiet warning */
+          }
+          else if (is_prop_edit && head != tail) {
+            calc_distanceCurveVerts(head, tail - 1);
+            head = tail;
+          }
+        }
+        if (is_prop_edit && head != tail) {
+          calc_distanceCurveVerts(head, tail - 1);
+        }
+
+        /* TODO - in the case of tilt and radius we can also avoid allocating the
+         * initTransDataCurveHandles but for now just don't change handle types */
+        if (ELEM(t->mode, TFM_CURVE_SHRINKFATTEN, TFM_TILT, TFM_DUMMY) == 0) {
+          /* sets the handles based on their selection,
+           * do this after the data is copied to the TransData */
+          BKE_nurb_handles_test(nu, !hide_handles);
+        }
+      }
+      else {
+        TransData *head, *tail;
+        head = tail = td;
+        for (a = nu->pntsu * nu->pntsv, bp = nu->bp; a > 0; a--, bp++) {
+          if (bp->hide == 0) {
+            if (is_prop_edit || (bp->f1 & SELECT)) {
+              float axismtx[3][3];
+
+              if (t->around == V3D_AROUND_LOCAL_ORIGINS) {
+                if (nu->pntsv == 1) {
+                  float normal[3], plane[3];
+
+                  BKE_nurb_bpoint_calc_normal(nu, bp, normal);
+                  BKE_nurb_bpoint_calc_plane(nu, bp, plane);
+
+                  if (createSpaceNormalTangent(axismtx, normal, plane)) {
+                    /* pass */
+                  }
+                  else {
+                    normalize_v3(normal);
+                    axis_dominant_v3_to_m3(axismtx, normal);
+                    invert_m3(axismtx);
+                  }
+                }
+              }
+
+              copy_v3_v3(td->iloc, bp->vec);
+              td->loc = bp->vec;
+              copy_v3_v3(td->center, td->loc);
+              if (bp->f1 & SELECT) {
+                td->flag = TD_SELECTED;
+              }
+              else {
+                td->flag = 0;
+              }
+              td->ext = NULL;
+
+              if (t->mode == TFM_CURVE_SHRINKFATTEN || t->mode == TFM_RESIZE) {
+                td->val = &(bp->radius);
+                td->ival = bp->radius;
+              }
+              else {
+                td->val = &(bp->tilt);
+                td->ival = bp->tilt;
+              }
+
+              copy_m3_m3(td->smtx, smtx);
+              copy_m3_m3(td->mtx, mtx);
+              if (t->around == V3D_AROUND_LOCAL_ORIGINS) {
+                if (nu->pntsv == 1) {
+                  copy_m3_m3(td->axismtx, axismtx);
+                }
+              }
+
+              td++;
+              tail++;
+            }
+          }
+          else if (is_prop_edit && head != tail) {
+            calc_distanceCurveVerts(head, tail - 1);
+            head = tail;
+          }
+        }
+        if (is_prop_edit && head != tail) {
+          calc_distanceCurveVerts(head, tail - 1);
+        }
+      }
+    }
+  }
+#undef SEL_F1
+#undef SEL_F2
+#undef SEL_F3
+}
+
+/** \} */