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, 265 insertions, 0 deletions

diff --git a/source/blender/editors/transform/transform_convert_nla.c b/source/blender/editors/transform/transform_convert_nla.c
new file mode 100644
index 00000000000..114968ec83f
--- /dev/null
+++ b/source/blender/editors/transform/transform_convert_nla.c
@@ -0,0 +1,265 @@
+/*
+ * 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_anim_types.h"
+#include "DNA_space_types.h"
+
+#include "MEM_guardedalloc.h"
+
+#include "BLI_math.h"
+#include "BLI_listbase.h"
+
+#include "BKE_nla.h"
+#include "BKE_context.h"
+#include "BKE_report.h"
+
+#include "ED_anim_api.h"
+
+#include "UI_view2d.h"
+
+#include "transform.h"
+#include "transform_convert.h"
+
+/* -------------------------------------------------------------------- */
+/** \name NLA Transform Creation
+ *
+ * \{ */
+
+void createTransNlaData(bContext *C, TransInfo *t)
+{
+  Scene *scene = t->scene;
+  SpaceNla *snla = NULL;
+  TransData *td = NULL;
+  TransDataNla *tdn = NULL;
+
+  bAnimContext ac;
+  ListBase anim_data = {NULL, NULL};
+  bAnimListElem *ale;
+  int filter;
+
+  int count = 0;
+
+  TransDataContainer *tc = TRANS_DATA_CONTAINER_FIRST_SINGLE(t);
+
+  /* determine what type of data we are operating on */
+  if (ANIM_animdata_get_context(C, &ac) == 0) {
+    return;
+  }
+  snla = (SpaceNla *)ac.sl;
+
+  /* filter data */
+  filter = (ANIMFILTER_DATA_VISIBLE | ANIMFILTER_LIST_VISIBLE | ANIMFILTER_FOREDIT);
+  ANIM_animdata_filter(&ac, &anim_data, filter, ac.data, ac.datatype);
+
+  /* which side of the current frame should be allowed */
+  if (t->mode == TFM_TIME_EXTEND) {
+    /* only side on which mouse is gets transformed */
+    float xmouse, ymouse;
+
+    UI_view2d_region_to_view(&ac.ar->v2d, t->mouse.imval[0], t->mouse.imval[1], &xmouse, &ymouse);
+    t->frame_side = (xmouse > CFRA) ? 'R' : 'L';
+  }
+  else {
+    /* normal transform - both sides of current frame are considered */
+    t->frame_side = 'B';
+  }
+
+  /* loop 1: count how many strips are selected (consider each strip as 2 points) */
+  for (ale = anim_data.first; ale; ale = ale->next) {
+    NlaTrack *nlt = (NlaTrack *)ale->data;
+    NlaStrip *strip;
+
+    /* make some meta-strips for chains of selected strips */
+    BKE_nlastrips_make_metas(&nlt->strips, 1);
+
+    /* only consider selected strips */
+    for (strip = nlt->strips.first; strip; strip = strip->next) {
+      // TODO: we can make strips have handles later on...
+      /* transition strips can't get directly transformed */
+      if (strip->type != NLASTRIP_TYPE_TRANSITION) {
+        if (strip->flag & NLASTRIP_FLAG_SELECT) {
+          if (FrameOnMouseSide(t->frame_side, strip->start, (float)CFRA)) {
+            count++;
+          }
+          if (FrameOnMouseSide(t->frame_side, strip->end, (float)CFRA)) {
+            count++;
+          }
+        }
+      }
+    }
+  }
+
+  /* stop if trying to build list if nothing selected */
+  if (count == 0) {
+    /* clear temp metas that may have been created but aren't needed now
+     * because they fell on the wrong side of CFRA
+     */
+    for (ale = anim_data.first; ale; ale = ale->next) {
+      NlaTrack *nlt = (NlaTrack *)ale->data;
+      BKE_nlastrips_clear_metas(&nlt->strips, 0, 1);
+    }
+
+    /* cleanup temp list */
+    ANIM_animdata_freelist(&anim_data);
+    return;
+  }
+
+  /* allocate memory for data */
+  tc->data_len = count;
+
+  tc->data = MEM_callocN(tc->data_len * sizeof(TransData), "TransData(NLA Editor)");
+  td = tc->data;
+  tc->custom.type.data = tdn = MEM_callocN(tc->data_len * sizeof(TransDataNla),
+                                           "TransDataNla (NLA Editor)");
+  tc->custom.type.use_free = true;
+
+  /* loop 2: build transdata array */
+  for (ale = anim_data.first; ale; ale = ale->next) {
+    /* only if a real NLA-track */
+    if (ale->type == ANIMTYPE_NLATRACK) {
+      AnimData *adt = ale->adt;
+      NlaTrack *nlt = (NlaTrack *)ale->data;
+      NlaStrip *strip;
+
+      /* only consider selected strips */
+      for (strip = nlt->strips.first; strip; strip = strip->next) {
+        // TODO: we can make strips have handles later on...
+        /* transition strips can't get directly transformed */
+        if (strip->type != NLASTRIP_TYPE_TRANSITION) {
+          if (strip->flag & NLASTRIP_FLAG_SELECT) {
+            /* our transform data is constructed as follows:
+             * - only the handles on the right side of the current-frame get included
+             * - td structs are transform-elements operated on by the transform system
+             *   and represent a single handle. The storage/pointer used (val or loc) depends on
+             *   whether we're scaling or transforming. Ultimately though, the handles
+             *   the td writes to will simply be a dummy in tdn
+             * - for each strip being transformed, a single tdn struct is used, so in some
+             *   cases, there will need to be 1 of these tdn elements in the array skipped...
+             */
+            float center[3], yval;
+
+            /* firstly, init tdn settings */
+            tdn->id = ale->id;
+            tdn->oldTrack = tdn->nlt = nlt;
+            tdn->strip = strip;
+            tdn->trackIndex = BLI_findindex(&adt->nla_tracks, nlt);
+
+            yval = (float)(tdn->trackIndex * NLACHANNEL_STEP(snla));
+
+            tdn->h1[0] = strip->start;
+            tdn->h1[1] = yval;
+            tdn->h2[0] = strip->end;
+            tdn->h2[1] = yval;
+
+            center[0] = (float)CFRA;
+            center[1] = yval;
+            center[2] = 0.0f;
+
+            /* set td's based on which handles are applicable */
+            if (FrameOnMouseSide(t->frame_side, strip->start, (float)CFRA)) {
+              /* just set tdn to assume that it only has one handle for now */
+              tdn->handle = -1;
+
+              /* now, link the transform data up to this data */
+              if (ELEM(t->mode, TFM_TRANSLATION, TFM_TIME_EXTEND)) {
+                td->loc = tdn->h1;
+                copy_v3_v3(td->iloc, tdn->h1);
+
+                /* store all the other gunk that is required by transform */
+                copy_v3_v3(td->center, center);
+                memset(td->axismtx, 0, sizeof(td->axismtx));
+                td->axismtx[2][2] = 1.0f;
+
+                td->ext = NULL;
+                td->val = NULL;
+
+                td->flag |= TD_SELECTED;
+                td->dist = 0.0f;
+
+                unit_m3(td->mtx);
+                unit_m3(td->smtx);
+              }
+              else {
+                /* time scaling only needs single value */
+                td->val = &tdn->h1[0];
+                td->ival = tdn->h1[0];
+              }
+
+              td->extra = tdn;
+              td++;
+            }
+            if (FrameOnMouseSide(t->frame_side, strip->end, (float)CFRA)) {
+              /* if tdn is already holding the start handle,
+               * then we're doing both, otherwise, only end */
+              tdn->handle = (tdn->handle) ? 2 : 1;
+
+              /* now, link the transform data up to this data */
+              if (ELEM(t->mode, TFM_TRANSLATION, TFM_TIME_EXTEND)) {
+                td->loc = tdn->h2;
+                copy_v3_v3(td->iloc, tdn->h2);
+
+                /* store all the other gunk that is required by transform */
+                copy_v3_v3(td->center, center);
+                memset(td->axismtx, 0, sizeof(td->axismtx));
+                td->axismtx[2][2] = 1.0f;
+
+                td->ext = NULL;
+                td->val = NULL;
+
+                td->flag |= TD_SELECTED;
+                td->dist = 0.0f;
+
+                unit_m3(td->mtx);
+                unit_m3(td->smtx);
+              }
+              else {
+                /* time scaling only needs single value */
+                td->val = &tdn->h2[0];
+                td->ival = tdn->h2[0];
+              }
+
+              td->extra = tdn;
+              td++;
+            }
+
+            /* If both handles were used, skip the next tdn (i.e. leave it blank)
+             * since the counting code is dumb.
+             * Otherwise, just advance to the next one.
+             */
+            if (tdn->handle == 2) {
+              tdn += 2;
+            }
+            else {
+              tdn++;
+            }
+          }
+        }
+      }
+    }
+  }
+
+  /* cleanup temp list */
+  ANIM_animdata_freelist(&anim_data);
+}
+
+/** \} */