Cleanup: Split transform.c in multiple files

Differential Revision: https://developer.blender.org/D5819

1 files changed, 198 insertions, 0 deletions

diff --git a/source/blender/editors/transform/transform_mode_rotate.c b/source/blender/editors/transform/transform_mode_rotate.c
new file mode 100644
index 00000000000..8a6024bb8fb
--- /dev/null
+++ b/source/blender/editors/transform/transform_mode_rotate.c
@@ -0,0 +1,198 @@
+/*
+ * 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 <stdlib.h>
+
+#include "BLI_math.h"
+
+#include "BKE_context.h"
+#include "BKE_unit.h"
+
+#include "ED_screen.h"
+
+#include "UI_interface.h"
+
+#include "transform.h"
+#include "transform_snap.h"
+#include "transform_mode.h"
+
+/* -------------------------------------------------------------------- */
+/* Transform (Rotation) */
+
+/** \name Transform Rotation
+ * \{ */
+
+static float large_rotation_limit(float angle)
+{
+  /* Limit rotation to 1001 turns max
+   * (otherwise iterative handling of 'large' rotations would become too slow). */
+  const float angle_max = (float)(M_PI * 2000.0);
+  if (fabsf(angle) > angle_max) {
+    const float angle_sign = angle < 0.0f ? -1.0f : 1.0f;
+    angle = angle_sign * (fmodf(fabsf(angle), (float)(M_PI * 2.0)) + angle_max);
+  }
+  return angle;
+}
+
+static void applyRotationValue(TransInfo *t,
+                               float angle,
+                               float axis[3],
+                               const bool is_large_rotation)
+{
+  float mat[3][3];
+  int i;
+
+  const float angle_sign = angle < 0.0f ? -1.0f : 1.0f;
+  /* We cannot use something too close to 180°, or 'continuous' rotation may fail
+   * due to computing error... */
+  const float angle_step = angle_sign * (float)(0.9 * M_PI);
+
+  if (is_large_rotation) {
+    /* Just in case, calling code should have already done that in practice
+     * (for UI feedback reasons). */
+    angle = large_rotation_limit(angle);
+  }
+
+  axis_angle_normalized_to_mat3(mat, axis, angle);
+  /* Counter for needed updates (when we need to update to non-default matrix,
+   * we also need another update on next iteration to go back to default matrix,
+   * hence the '2' value used here, instead of a mere boolean). */
+  short do_update_matrix = 0;
+
+  FOREACH_TRANS_DATA_CONTAINER (t, tc) {
+    TransData *td = tc->data;
+    for (i = 0; i < tc->data_len; i++, td++) {
+      if (td->flag & TD_NOACTION) {
+        break;
+      }
+
+      if (td->flag & TD_SKIP) {
+        continue;
+      }
+
+      float angle_final = angle;
+      if (t->con.applyRot) {
+        t->con.applyRot(t, tc, td, axis, NULL);
+        angle_final = angle * td->factor;
+        /* Even though final angle might be identical to orig value,
+         * we have to update the rotation matrix in that case... */
+        do_update_matrix = 2;
+      }
+      else if (t->flag & T_PROP_EDIT) {
+        angle_final = angle * td->factor;
+      }
+
+      /* Rotation is very likely to be above 180°, we need to do rotation by steps.
+       * Note that this is only needed when doing 'absolute' rotation
+       * (i.e. from initial rotation again, typically when using numinput).
+       * regular incremental rotation (from mouse/widget/...) will be called often enough,
+       * hence steps are small enough to be properly handled without that complicated trick.
+       * Note that we can only do that kind of stepped rotation if we have initial rotation values
+       * (and access to some actual rotation value storage).
+       * Otherwise, just assume it's useless (e.g. in case of mesh/UV/etc. editing).
+       * Also need to be in Euler rotation mode, the others never allow more than one turn anyway.
+       */
+      if (is_large_rotation && td->ext != NULL && td->ext->rotOrder == ROT_MODE_EUL) {
+        copy_v3_v3(td->ext->rot, td->ext->irot);
+        for (float angle_progress = angle_step; fabsf(angle_progress) < fabsf(angle_final);
+             angle_progress += angle_step) {
+          axis_angle_normalized_to_mat3(mat, axis, angle_progress);
+          ElementRotation(t, tc, td, mat, t->around);
+        }
+        do_update_matrix = 2;
+      }
+      else if (angle_final != angle) {
+        do_update_matrix = 2;
+      }
+
+      if (do_update_matrix > 0) {
+        axis_angle_normalized_to_mat3(mat, axis, angle_final);
+        do_update_matrix--;
+      }
+
+      ElementRotation(t, tc, td, mat, t->around);
+    }
+  }
+}
+
+static void applyRotation(TransInfo *t, const int UNUSED(mval[2]))
+{
+  char str[UI_MAX_DRAW_STR];
+
+  float final;
+
+  final = t->values[0];
+
+  snapGridIncrement(t, &final);
+
+  float axis_final[3];
+  copy_v3_v3(axis_final, t->orient_matrix[t->orient_axis]);
+
+  if ((t->con.mode & CON_APPLY) && t->con.applyRot) {
+    t->con.applyRot(t, NULL, NULL, axis_final, NULL);
+  }
+
+  applySnapping(t, &final);
+
+  if (applyNumInput(&t->num, &final)) {
+    /* We have to limit the amount of turns to a reasonable number here,
+     * to avoid things getting *very* slow, see how applyRotationValue() handles those... */
+    final = large_rotation_limit(final);
+  }
+
+  t->values_final[0] = final;
+
+  headerRotation(t, str, final);
+
+  const bool is_large_rotation = hasNumInput(&t->num);
+  applyRotationValue(t, final, axis_final, is_large_rotation);
+
+  recalcData(t);
+
+  ED_area_status_text(t->sa, str);
+}
+
+void initRotation(TransInfo *t)
+{
+  t->mode = TFM_ROTATION;
+  t->transform = applyRotation;
+
+  setInputPostFct(&t->mouse, postInputRotation);
+  initMouseInputMode(t, &t->mouse, INPUT_ANGLE);
+
+  t->idx_max = 0;
+  t->num.idx_max = 0;
+  t->snap[0] = 0.0f;
+  t->snap[1] = DEG2RAD(5.0);
+  t->snap[2] = DEG2RAD(1.0);
+
+  copy_v3_fl(t->num.val_inc, t->snap[2]);
+  t->num.unit_sys = t->scene->unit.system;
+  t->num.unit_use_radians = (t->scene->unit.system_rotation == USER_UNIT_ROT_RADIANS);
+  t->num.unit_type[0] = B_UNIT_ROTATION;
+
+  if (t->flag & T_2D_EDIT) {
+    t->flag |= T_NO_CONSTRAINT;
+  }
+}
+/** \} */