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/*
* 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_mode.h"
#include "transform_snap.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->area, 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;
}
}
/** \} */
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