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5e12e62a6a4e333d0d93d50b0dc943e2d19ee3e5
blender/source/blender/editors/transform/transform_snap.c
Germano Cavalcante 5e12e62a6a Fix regression with incremental snap in Graph Editor 
Regression introduced in {rBb0d9e6797fb8}.

Previously the Graphics Editor had a conflict with two different snap
types. Auto-Snap and Snap with Ctrl.

It is now clearer which snap should prevail.
2021-10-14 13:10:19 -03:00

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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 <float.h>
#include "PIL_time.h"
#include "DNA_windowmanager_types.h"
#include "BLI_blenlib.h"
#include "BLI_math.h"
#include "GPU_immediate.h"
#include "GPU_state.h"
#include "BKE_context.h"
#include "BKE_editmesh.h"
#include "BKE_layer.h"
#include "BKE_object.h"
#include "BKE_scene.h"
#include "RNA_access.h"
#include "WM_types.h"
#include "ED_gizmo_library.h"
#include "ED_markers.h"
#include "ED_node.h"
#include "ED_transform_snap_object_context.h"
#include "ED_uvedit.h"
#include "UI_resources.h"
#include "UI_view2d.h"
#include "SEQ_iterator.h"
#include "SEQ_sequencer.h"
#include "SEQ_time.h"
#include "MEM_guardedalloc.h"
#include "transform.h"
#include "transform_convert.h"
#include "transform_snap.h"
static bool doForceIncrementSnap(const TransInfo *t);
/* this should be passed as an arg for use in snap functions */
#undef BASACT
/* use half of flt-max so we can scale up without an exception */
/* -------------------------------------------------------------------- */
/** \name Prototypes
* \{ */
static void setSnappingCallback(TransInfo *t);
/* static void CalcSnapGrid(TransInfo *t, float *vec); */
static void snap_calc_view3d_fn(TransInfo *t, float *vec);
static void snap_calc_uv_fn(TransInfo *t, float *vec);
static void snap_calc_node_fn(TransInfo *t, float *vec);
static void snap_calc_sequencer_fn(TransInfo *t, float *vec);
static void TargetSnapMedian(TransInfo *t);
static void TargetSnapCenter(TransInfo *t);
static void TargetSnapClosest(TransInfo *t);
static void TargetSnapActive(TransInfo *t);
/** \} */
/* -------------------------------------------------------------------- */
/** \name Implementations
* \{ */
static bool snapNodeTest(View2D *v2d, bNode *node, eSnapSelect snap_select);
static NodeBorder snapNodeBorder(int snap_node_mode);
#if 0
int BIF_snappingSupported(Object *obedit)
{
int status = 0;
/* only support object mesh, armature, curves */
if (obedit == NULL || ELEM(obedit->type, OB_MESH, OB_ARMATURE, OB_CURVE, OB_LATTICE, OB_MBALL)) {
status = 1;
}
return status;
}
#endif
static bool snap_use_backface_culling(const TransInfo *t)
{
BLI_assert(t->spacetype == SPACE_VIEW3D);
View3D *v3d = t->view;
if ((v3d->shading.type == OB_SOLID) && (v3d->shading.flag & V3D_SHADING_BACKFACE_CULLING)) {
return true;
}
if (v3d->shading.type == OB_RENDER &&
(t->scene->display.shading.flag & V3D_SHADING_BACKFACE_CULLING) &&
BKE_scene_uses_blender_workbench(t->scene)) {
return true;
}
if (t->settings->snap_flag & SCE_SNAP_BACKFACE_CULLING) {
return true;
}
return false;
}
bool validSnap(const TransInfo *t)
{
return (t->tsnap.status & (POINT_INIT | TARGET_INIT)) == (POINT_INIT | TARGET_INIT) ||
(t->tsnap.status & (MULTI_POINTS | TARGET_INIT)) == (MULTI_POINTS | TARGET_INIT);
}
bool activeSnap(const TransInfo *t)
{
return ((t->modifiers & (MOD_SNAP | MOD_SNAP_INVERT)) == MOD_SNAP) ||
((t->modifiers & (MOD_SNAP | MOD_SNAP_INVERT)) == MOD_SNAP_INVERT);
}
bool activeSnap_with_project(const TransInfo *t)
{
if (!t->tsnap.project) {
return false;
}
if (!activeSnap(t) || (t->flag & T_NO_PROJECT)) {
return false;
}
if (doForceIncrementSnap(t)) {
return false;
}
return true;
}
bool transformModeUseSnap(const TransInfo *t)
{
ToolSettings *ts = t->settings;
if (t->mode == TFM_TRANSLATION) {
return (ts->snap_transform_mode_flag & SCE_SNAP_TRANSFORM_MODE_TRANSLATE) != 0;
}
if (t->mode == TFM_ROTATION) {
return (ts->snap_transform_mode_flag & SCE_SNAP_TRANSFORM_MODE_ROTATE) != 0;
}
if (t->mode == TFM_RESIZE) {
return (ts->snap_transform_mode_flag & SCE_SNAP_TRANSFORM_MODE_SCALE) != 0;
}
if (ELEM(t->mode, TFM_VERT_SLIDE, TFM_EDGE_SLIDE, TFM_SEQ_SLIDE)) {
return true;
}
return false;
}
static bool doForceIncrementSnap(const TransInfo *t)
{
return !transformModeUseSnap(t);
}
void drawSnapping(const struct bContext *C, TransInfo *t)
{
uchar col[4], selectedCol[4], activeCol[4];
if (!activeSnap(t)) {
return;
}
UI_GetThemeColor3ubv(TH_TRANSFORM, col);
col[3] = 128;
UI_GetThemeColor3ubv(TH_SELECT, selectedCol);
selectedCol[3] = 128;
UI_GetThemeColor3ubv(TH_ACTIVE, activeCol);
activeCol[3] = 192;
if (t->spacetype == SPACE_VIEW3D) {
bool draw_target = (t->tsnap.status & TARGET_INIT) &&
(t->scene->toolsettings->snap_mode & SCE_SNAP_MODE_EDGE_PERPENDICULAR);
if (draw_target || validSnap(t)) {
const float *loc_cur = NULL;
const float *loc_prev = NULL;
const float *normal = NULL;
GPU_depth_test(GPU_DEPTH_NONE);
RegionView3D *rv3d = CTX_wm_region_view3d(C);
if (!BLI_listbase_is_empty(&t->tsnap.points)) {
/* Draw snap points. */
float size = 2.0f * UI_GetThemeValuef(TH_VERTEX_SIZE);
float view_inv[4][4];
copy_m4_m4(view_inv, rv3d->viewinv);
uint pos = GPU_vertformat_attr_add(
immVertexFormat(), "pos", GPU_COMP_F32, 3, GPU_FETCH_FLOAT);
immBindBuiltinProgram(GPU_SHADER_3D_UNIFORM_COLOR);
LISTBASE_FOREACH (TransSnapPoint *, p, &t->tsnap.points) {
if (p == t->tsnap.selectedPoint) {
immUniformColor4ubv(selectedCol);
}
else {
immUniformColor4ubv(col);
}
imm_drawcircball(p->co, ED_view3d_pixel_size(rv3d, p->co) * size, view_inv, pos);
}
immUnbindProgram();
}
/* draw normal if needed */
if (usingSnappingNormal(t) && validSnappingNormal(t)) {
normal = t->tsnap.snapNormal;
}
if (draw_target) {
loc_prev = t->tsnap.snapTarget;
}
if (validSnap(t)) {
loc_cur = t->tsnap.snapPoint;
}
ED_gizmotypes_snap_3d_draw_util(
rv3d, loc_prev, loc_cur, normal, col, activeCol, t->tsnap.snapElem);
GPU_depth_test(GPU_DEPTH_LESS_EQUAL);
}
}
else if (t->spacetype == SPACE_IMAGE) {
if (validSnap(t)) {
/* This will not draw, and I'm nor sure why - campbell */
/* TODO: see 2.7x for non-working code */
}
}
else if (t->spacetype == SPACE_NODE) {
if (validSnap(t)) {
ARegion *region = CTX_wm_region(C);
TransSnapPoint *p;
float size;
size = 2.5f * UI_GetThemeValuef(TH_VERTEX_SIZE);
GPU_blend(GPU_BLEND_ALPHA);
uint pos = GPU_vertformat_attr_add(
immVertexFormat(), "pos", GPU_COMP_F32, 2, GPU_FETCH_FLOAT);
immBindBuiltinProgram(GPU_SHADER_2D_UNIFORM_COLOR);
for (p = t->tsnap.points.first; p; p = p->next) {
if (p == t->tsnap.selectedPoint) {
immUniformColor4ubv(selectedCol);
}
else {
immUniformColor4ubv(col);
}
ED_node_draw_snap(&region->v2d, p->co, size, 0, pos);
}
if (t->tsnap.status & POINT_INIT) {
immUniformColor4ubv(activeCol);
ED_node_draw_snap(&region->v2d, t->tsnap.snapPoint, size, t->tsnap.snapNodeBorder, pos);
}
immUnbindProgram();
GPU_blend(GPU_BLEND_NONE);
}
}
else if (t->spacetype == SPACE_SEQ) {
if (validSnap(t)) {
const ARegion *region = CTX_wm_region(C);
GPU_blend(GPU_BLEND_ALPHA);
uint pos = GPU_vertformat_attr_add(
immVertexFormat(), "pos", GPU_COMP_F32, 2, GPU_FETCH_FLOAT);
immBindBuiltinProgram(GPU_SHADER_2D_UNIFORM_COLOR);
UI_GetThemeColor3ubv(TH_SEQ_ACTIVE, col);
col[3] = 128;
immUniformColor4ubv(col);
float pixelx = BLI_rctf_size_x(&region->v2d.cur) / BLI_rcti_size_x(&region->v2d.mask);
immRectf(pos,
t->tsnap.snapPoint[0] - pixelx,
region->v2d.cur.ymax,
t->tsnap.snapPoint[0] + pixelx,
region->v2d.cur.ymin);
immUnbindProgram();
GPU_blend(GPU_BLEND_NONE);
}
}
}
eRedrawFlag handleSnapping(TransInfo *t, const wmEvent *event)
{
eRedrawFlag status = TREDRAW_NOTHING;
#if 0 /* XXX need a proper selector for all snap mode */
if (BIF_snappingSupported(t->obedit) && event->type == TABKEY && event->shift) {
/* toggle snap and reinit */
t->settings->snap_flag ^= SCE_SNAP;
initSnapping(t, NULL);
status = TREDRAW_HARD;
}
#endif
if (event->type == MOUSEMOVE) {
status |= updateSelectedSnapPoint(t);
}
return status;
}
void applyProject(TransInfo *t)
{
if (!activeSnap_with_project(t)) {
return;
}
float tvec[3];
int i;
/* XXX FLICKER IN OBJECT MODE */
FOREACH_TRANS_DATA_CONTAINER (t, tc) {
TransData *td = tc->data;
for (i = 0; i < tc->data_len; i++, td++) {
float iloc[3], loc[3], no[3];
float mval_fl[2];
if (td->flag & TD_SKIP) {
continue;
}
if ((t->flag & T_PROP_EDIT) && (td->factor == 0.0f)) {
continue;
}
copy_v3_v3(iloc, td->loc);
if (tc->use_local_mat) {
mul_m4_v3(tc->mat, iloc);
}
else if (t->options & CTX_OBJECT) {
BKE_object_eval_transform_all(t->depsgraph, t->scene, td->ob);
copy_v3_v3(iloc, td->ob->obmat[3]);
}
if (ED_view3d_project_float_global(t->region, iloc, mval_fl, V3D_PROJ_TEST_NOP) ==
V3D_PROJ_RET_OK) {
if (ED_transform_snap_object_project_view3d(
t->tsnap.object_context,
t->depsgraph,
t->region,
t->view,
SCE_SNAP_MODE_FACE,
&(const struct SnapObjectParams){
.snap_select = t->tsnap.modeSelect,
.edit_mode_type = (t->flag & T_EDIT) != 0 ? SNAP_GEOM_EDIT : SNAP_GEOM_FINAL,
.use_occlusion_test = false,
.use_backface_culling = t->tsnap.use_backface_culling,
},
mval_fl,
NULL,
0,
loc,
no)) {
#if 0
if (tc->use_local_mat) {
mul_m4_v3(tc->imat, loc);
}
#endif
sub_v3_v3v3(tvec, loc, iloc);
mul_m3_v3(td->smtx, tvec);
add_v3_v3(td->loc, tvec);
if (t->tsnap.align && (t->options & CTX_OBJECT)) {
/* handle alignment as well */
const float *original_normal;
float mat[3][3];
/* In pose mode, we want to align normals with Y axis of bones... */
original_normal = td->axismtx[2];
rotation_between_vecs_to_mat3(mat, original_normal, no);
transform_data_ext_rotate(td, mat, true);
/* TODO: support constraints for rotation too? see #ElementRotation. */
}
}
}
#if 0 /* TODO: support this? */
constraintTransLim(t, td);
#endif
}
}
}
void applyGridAbsolute(TransInfo *t)
{
int i;
if (!(activeSnap(t) && (t->tsnap.mode & (SCE_SNAP_MODE_INCREMENT | SCE_SNAP_MODE_GRID)))) {
return;
}
float grid_size = (t->modifiers & MOD_PRECISION) ? t->snap_spatial[1] : t->snap_spatial[0];
/* early exit on unusable grid size */
if (grid_size == 0.0f) {
return;
}
FOREACH_TRANS_DATA_CONTAINER (t, tc) {
TransData *td;
for (i = 0, td = tc->data; i < tc->data_len; i++, td++) {
float iloc[3], loc[3], tvec[3];
if (td->flag & TD_SKIP) {
continue;
}
if ((t->flag & T_PROP_EDIT) && (td->factor == 0.0f)) {
continue;
}
copy_v3_v3(iloc, td->loc);
if (tc->use_local_mat) {
mul_m4_v3(tc->mat, iloc);
}
else if (t->options & CTX_OBJECT) {
BKE_object_eval_transform_all(t->depsgraph, t->scene, td->ob);
copy_v3_v3(iloc, td->ob->obmat[3]);
}
mul_v3_v3fl(loc, iloc, 1.0f / grid_size);
loc[0] = roundf(loc[0]);
loc[1] = roundf(loc[1]);
loc[2] = roundf(loc[2]);
mul_v3_fl(loc, grid_size);
sub_v3_v3v3(tvec, loc, iloc);
mul_m3_v3(td->smtx, tvec);
add_v3_v3(td->loc, tvec);
}
}
}
void applySnapping(TransInfo *t, float *vec)
{
/* Each Trans Data already makes the snap to face */
if (doForceIncrementSnap(t)) {
return;
}
if (t->tsnap.project && t->tsnap.mode == SCE_SNAP_MODE_FACE) {
/* The snap has already been resolved for each transdata. */
return;
}
if (t->tsnap.status & SNAP_FORCED) {
t->tsnap.targetSnap(t);
t->tsnap.applySnap(t, vec);
}
else if (((t->tsnap.mode & ~(SCE_SNAP_MODE_INCREMENT | SCE_SNAP_MODE_GRID)) != 0) &&
activeSnap(t)) {
double current = PIL_check_seconds_timer();
/* Time base quirky code to go around find-nearest slowness. */
/* TODO: add exception for object mode, no need to slow it down then. */
if (current - t->tsnap.last >= 0.01) {
t->tsnap.calcSnap(t, vec);
if (t->tsnap.targetSnap) {
t->tsnap.targetSnap(t);
}
}
t->tsnap.last = current;
if (validSnap(t)) {
t->tsnap.applySnap(t, vec);
}
}
}
void resetSnapping(TransInfo *t)
{
t->tsnap.status = 0;
t->tsnap.snapElem = 0;
t->tsnap.align = false;
t->tsnap.project = 0;
t->tsnap.mode = 0;
t->tsnap.modeSelect = 0;
t->tsnap.target = 0;
t->tsnap.last = 0;
t->tsnap.snapNormal[0] = 0;
t->tsnap.snapNormal[1] = 0;
t->tsnap.snapNormal[2] = 0;
t->tsnap.snapNodeBorder = 0;
}
bool usingSnappingNormal(const TransInfo *t)
{
return t->tsnap.align;
}
bool validSnappingNormal(const TransInfo *t)
{
if (validSnap(t)) {
if (!is_zero_v3(t->tsnap.snapNormal)) {
return true;
}
}
return false;
}
static bool bm_edge_is_snap_target(BMEdge *e, void *UNUSED(user_data))
{
if (BM_elem_flag_test(e, BM_ELEM_SELECT | BM_ELEM_HIDDEN) ||
BM_elem_flag_test(e->v1, BM_ELEM_SELECT) || BM_elem_flag_test(e->v2, BM_ELEM_SELECT)) {
return false;
}
return true;
}
static bool bm_face_is_snap_target(BMFace *f, void *UNUSED(user_data))
{
if (BM_elem_flag_test(f, BM_ELEM_SELECT | BM_ELEM_HIDDEN)) {
return false;
}
BMLoop *l_iter, *l_first;
l_iter = l_first = BM_FACE_FIRST_LOOP(f);
do {
if (BM_elem_flag_test(l_iter->v, BM_ELEM_SELECT)) {
return false;
}
} while ((l_iter = l_iter->next) != l_first);
return true;
}
static void initSnappingMode(TransInfo *t)
{
ToolSettings *ts = t->settings;
/* All obedit types will match. */
const int obedit_type = t->obedit_type;
ViewLayer *view_layer = t->view_layer;
Base *base_act = view_layer->basact;
if (t->spacetype == SPACE_NODE) {
/* force project off when not supported */
t->tsnap.project = 0;
t->tsnap.mode = ts->snap_node_mode;
}
else if (t->spacetype == SPACE_IMAGE) {
/* force project off when not supported */
t->tsnap.project = 0;
t->tsnap.mode = ts->snap_uv_mode;
if ((t->tsnap.mode & SCE_SNAP_MODE_INCREMENT) && (ts->snap_uv_flag & SCE_SNAP_ABS_GRID) &&
(t->mode == TFM_TRANSLATION)) {
t->tsnap.mode &= ~SCE_SNAP_MODE_INCREMENT;
t->tsnap.mode |= SCE_SNAP_MODE_GRID;
}
}
else if (t->spacetype == SPACE_SEQ) {
t->tsnap.mode = SEQ_tool_settings_snap_mode_get(t->scene);
}
else if (ELEM(t->spacetype, SPACE_VIEW3D, SPACE_IMAGE) && !(t->options & CTX_CAMERA)) {
/* force project off when not supported */
if ((ts->snap_mode & SCE_SNAP_MODE_FACE) == 0) {
t->tsnap.project = 0;
}
t->tsnap.mode = ts->snap_mode;
if ((t->tsnap.mode & SCE_SNAP_MODE_INCREMENT) && (ts->snap_flag & SCE_SNAP_ABS_GRID) &&
(t->mode == TFM_TRANSLATION)) {
/* Special case in which snap to increments is transformed to snap to grid. */
t->tsnap.mode &= ~SCE_SNAP_MODE_INCREMENT;
t->tsnap.mode |= SCE_SNAP_MODE_GRID;
}
}
else if (ELEM(t->spacetype, SPACE_ACTION, SPACE_NLA)) {
/* No incremental snapping. */
t->tsnap.mode = 0;
}
else {
/* Fallback. */
t->tsnap.mode = SCE_SNAP_MODE_INCREMENT;
}
if (ELEM(t->spacetype, SPACE_VIEW3D, SPACE_IMAGE) && !(t->options & CTX_CAMERA)) {
/* Only 3D view or UV. */
/* Not with camera selected in camera view. */
setSnappingCallback(t);
if (t->options & (CTX_GPENCIL_STROKES | CTX_CURSOR | CTX_OBMODE_XFORM_OBDATA)) {
/* In "Edit Strokes" mode,
* snap tool can perform snap to selected or active objects (see T49632)
* TODO: perform self snap in gpencil_strokes.
*
* When we're moving the origins, allow snapping onto our own geometry (see T69132). */
t->tsnap.modeSelect = SNAP_ALL;
}
else if ((obedit_type != -1) &&
ELEM(obedit_type, OB_MESH, OB_ARMATURE, OB_CURVE, OB_LATTICE, OB_MBALL)) {
/* Edit mode */
/* Temporary limited to edit mode meshes, armature, curves, metaballs. */
if ((obedit_type == OB_MESH) && (t->flag & T_PROP_EDIT)) {
/* Exclude editmesh if using proportional edit */
t->tsnap.modeSelect = SNAP_NOT_ACTIVE;
}
else {
t->tsnap.modeSelect = t->tsnap.snap_self ? SNAP_ALL : SNAP_NOT_ACTIVE;
}
}
else if ((obedit_type == -1) && base_act && base_act->object &&
(base_act->object->mode & OB_MODE_PARTICLE_EDIT)) {
/* Particles edit mode. */
t->tsnap.modeSelect = SNAP_ALL;
}
else if (obedit_type == -1) {
/* Object mode */
t->tsnap.modeSelect = SNAP_NOT_SELECTED;
}
else {
/* Increment if snap is not possible */
t->tsnap.mode = SCE_SNAP_MODE_INCREMENT;
}
}
else if (ELEM(t->spacetype, SPACE_NODE, SPACE_SEQ)) {
setSnappingCallback(t);
t->tsnap.modeSelect = SNAP_NOT_SELECTED;
}
if (t->spacetype == SPACE_VIEW3D) {
if (t->tsnap.object_context == NULL) {
t->tsnap.use_backface_culling = snap_use_backface_culling(t);
t->tsnap.object_context = ED_transform_snap_object_context_create(t->scene, 0);
if (t->data_type == TC_MESH_VERTS) {
/* Ignore elements being transformed. */
ED_transform_snap_object_context_set_editmesh_callbacks(
t->tsnap.object_context,
(bool (*)(BMVert *, void *))BM_elem_cb_check_hflag_disabled,
bm_edge_is_snap_target,
bm_face_is_snap_target,
POINTER_FROM_UINT((BM_ELEM_SELECT | BM_ELEM_HIDDEN)));
}
}
}
else if (t->spacetype == SPACE_SEQ) {
if (t->tsnap.seq_context == NULL) {
t->tsnap.seq_context = transform_snap_sequencer_data_alloc(t);
}
}
}
void initSnapping(TransInfo *t, wmOperator *op)
{
ToolSettings *ts = t->settings;
short snap_target = t->settings->snap_target;
resetSnapping(t);
/* if snap property exists */
if (op && RNA_struct_find_property(op->ptr, "snap") &&
RNA_struct_property_is_set(op->ptr, "snap")) {
if (RNA_boolean_get(op->ptr, "snap")) {
t->modifiers |= MOD_SNAP;
if (RNA_struct_property_is_set(op->ptr, "snap_target")) {
snap_target = RNA_enum_get(op->ptr, "snap_target");
}
if (RNA_struct_property_is_set(op->ptr, "snap_point")) {
RNA_float_get_array(op->ptr, "snap_point", t->tsnap.snapPoint);
t->tsnap.status |= SNAP_FORCED | POINT_INIT;
}
/* snap align only defined in specific cases */
if (RNA_struct_find_property(op->ptr, "snap_align")) {
t->tsnap.align = RNA_boolean_get(op->ptr, "snap_align");
RNA_float_get_array(op->ptr, "snap_normal", t->tsnap.snapNormal);
normalize_v3(t->tsnap.snapNormal);
}
if (RNA_struct_find_property(op->ptr, "use_snap_project")) {
t->tsnap.project = RNA_boolean_get(op->ptr, "use_snap_project");
}
if (RNA_struct_find_property(op->ptr, "use_snap_self")) {
t->tsnap.snap_self = RNA_boolean_get(op->ptr, "use_snap_self");
}
}
}
/* use scene defaults only when transform is modal */
else if (t->flag & T_MODAL) {
if (ELEM(t->spacetype, SPACE_VIEW3D, SPACE_IMAGE, SPACE_NODE)) {
if (transformModeUseSnap(t) && (ts->snap_flag & SCE_SNAP)) {
t->modifiers |= MOD_SNAP;
}
t->tsnap.align = ((t->settings->snap_flag & SCE_SNAP_ROTATE) != 0);
t->tsnap.project = ((t->settings->snap_flag & SCE_SNAP_PROJECT) != 0);
t->tsnap.snap_self = !((t->settings->snap_flag & SCE_SNAP_NO_SELF) != 0);
t->tsnap.peel = ((t->settings->snap_flag & SCE_SNAP_PROJECT) != 0);
}
else if ((t->spacetype == SPACE_SEQ) && (ts->snap_flag & SCE_SNAP_SEQ)) {
t->modifiers |= MOD_SNAP;
}
}
t->tsnap.target = snap_target;
initSnappingMode(t);
}
void freeSnapping(TransInfo *t)
{
if ((t->spacetype == SPACE_SEQ) && t->tsnap.seq_context) {
transform_snap_sequencer_data_free(t->tsnap.seq_context);
t->tsnap.seq_context = NULL;
}
else if (t->tsnap.object_context) {
ED_transform_snap_object_context_destroy(t->tsnap.object_context);
t->tsnap.object_context = NULL;
}
}
static void setSnappingCallback(TransInfo *t)
{
if (t->spacetype == SPACE_VIEW3D) {
t->tsnap.calcSnap = snap_calc_view3d_fn;
}
else if (t->spacetype == SPACE_IMAGE && t->obedit_type == OB_MESH) {
t->tsnap.calcSnap = snap_calc_uv_fn;
}
else if (t->spacetype == SPACE_NODE) {
t->tsnap.calcSnap = snap_calc_node_fn;
}
else if (t->spacetype == SPACE_SEQ) {
t->tsnap.calcSnap = snap_calc_sequencer_fn;
/* The target is calculated along with the snap point. */
return;
}
switch (t->tsnap.target) {
case SCE_SNAP_TARGET_CLOSEST:
t->tsnap.targetSnap = TargetSnapClosest;
break;
case SCE_SNAP_TARGET_CENTER:
if (!ELEM(t->mode, TFM_ROTATION, TFM_RESIZE)) {
t->tsnap.targetSnap = TargetSnapCenter;
break;
}
/* Can't do TARGET_CENTER with these modes,
* use TARGET_MEDIAN instead. */
ATTR_FALLTHROUGH;
case SCE_SNAP_TARGET_MEDIAN:
t->tsnap.targetSnap = TargetSnapMedian;
break;
case SCE_SNAP_TARGET_ACTIVE:
t->tsnap.targetSnap = TargetSnapActive;
break;
}
}
void addSnapPoint(TransInfo *t)
{
/* Currently only 3D viewport works for snapping points. */
if (t->tsnap.status & POINT_INIT && t->spacetype == SPACE_VIEW3D) {
TransSnapPoint *p = MEM_callocN(sizeof(TransSnapPoint), "SnapPoint");
t->tsnap.selectedPoint = p;
copy_v3_v3(p->co, t->tsnap.snapPoint);
BLI_addtail(&t->tsnap.points, p);
t->tsnap.status |= MULTI_POINTS;
}
}
eRedrawFlag updateSelectedSnapPoint(TransInfo *t)
{
eRedrawFlag status = TREDRAW_NOTHING;
if (t->tsnap.status & MULTI_POINTS) {
TransSnapPoint *p, *closest_p = NULL;
float dist_min_sq = TRANSFORM_SNAP_MAX_PX;
const float mval_fl[2] = {t->mval[0], t->mval[1]};
float screen_loc[2];
for (p = t->tsnap.points.first; p; p = p->next) {
float dist_sq;
if (ED_view3d_project_float_global(t->region, p->co, screen_loc, V3D_PROJ_TEST_NOP) !=
V3D_PROJ_RET_OK) {
continue;
}
dist_sq = len_squared_v2v2(mval_fl, screen_loc);
if (dist_sq < dist_min_sq) {
closest_p = p;
dist_min_sq = dist_sq;
}
}
if (closest_p) {
if (t->tsnap.selectedPoint != closest_p) {
status = TREDRAW_HARD;
}
t->tsnap.selectedPoint = closest_p;
}
}
return status;
}
void removeSnapPoint(TransInfo *t)
{
if (t->tsnap.status & MULTI_POINTS) {
updateSelectedSnapPoint(t);
if (t->tsnap.selectedPoint) {
BLI_freelinkN(&t->tsnap.points, t->tsnap.selectedPoint);
if (BLI_listbase_is_empty(&t->tsnap.points)) {
t->tsnap.status &= ~MULTI_POINTS;
}
t->tsnap.selectedPoint = NULL;
}
}
}
void getSnapPoint(const TransInfo *t, float vec[3])
{
if (t->tsnap.points.first) {
TransSnapPoint *p;
int total = 0;
vec[0] = vec[1] = vec[2] = 0;
for (p = t->tsnap.points.first; p; p = p->next, total++) {
add_v3_v3(vec, p->co);
}
if (t->tsnap.status & POINT_INIT) {
add_v3_v3(vec, t->tsnap.snapPoint);
total++;
}
mul_v3_fl(vec, 1.0f / total);
}
else {
copy_v3_v3(vec, t->tsnap.snapPoint);
}
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Calc Snap
* \{ */
static void snap_calc_view3d_fn(TransInfo *t, float *UNUSED(vec))
{
BLI_assert(t->spacetype == SPACE_VIEW3D);
float loc[3];
float no[3];
float mval[2];
bool found = false;
short snap_elem = 0;
float dist_px = SNAP_MIN_DISTANCE; /* Use a user defined value here. */
mval[0] = t->mval[0];
mval[1] = t->mval[1];
if (t->tsnap.mode & (SCE_SNAP_MODE_VERTEX | SCE_SNAP_MODE_EDGE | SCE_SNAP_MODE_FACE |
SCE_SNAP_MODE_EDGE_MIDPOINT | SCE_SNAP_MODE_EDGE_PERPENDICULAR)) {
zero_v3(no); /* objects won't set this */
snap_elem = snapObjectsTransform(t, mval, &dist_px, loc, no);
found = snap_elem != 0;
}
if ((found == false) && (t->tsnap.mode & SCE_SNAP_MODE_VOLUME)) {
found = peelObjectsTransform(
t, mval, (t->settings->snap_flag & SCE_SNAP_PEEL_OBJECT) != 0, loc, no, NULL);
if (found) {
snap_elem = SCE_SNAP_MODE_VOLUME;
}
}
if (found == true) {
copy_v3_v3(t->tsnap.snapPoint, loc);
copy_v3_v3(t->tsnap.snapNormal, no);
t->tsnap.status |= POINT_INIT;
}
else {
t->tsnap.status &= ~POINT_INIT;
}
t->tsnap.snapElem = (char)snap_elem;
}
static void snap_calc_uv_fn(TransInfo *t, float *UNUSED(vec))
{
BLI_assert(t->spacetype == SPACE_IMAGE && t->obedit_type == OB_MESH);
if (t->tsnap.mode & SCE_SNAP_MODE_VERTEX) {
float co[2];
UI_view2d_region_to_view(&t->region->v2d, t->mval[0], t->mval[1], &co[0], &co[1]);
uint objects_len = 0;
Object **objects = BKE_view_layer_array_from_objects_in_edit_mode_unique_data_with_uvs(
t->view_layer, NULL, &objects_len);
float dist_sq = FLT_MAX;
if (ED_uvedit_nearest_uv_multi(
t->scene, objects, objects_len, co, &dist_sq, t->tsnap.snapPoint)) {
t->tsnap.snapPoint[0] *= t->aspect[0];
t->tsnap.snapPoint[1] *= t->aspect[1];
t->tsnap.status |= POINT_INIT;
}
else {
t->tsnap.status &= ~POINT_INIT;
}
MEM_freeN(objects);
}
}
static void snap_calc_node_fn(TransInfo *t, float *UNUSED(vec))
{
BLI_assert(t->spacetype == SPACE_NODE);
if (t->tsnap.mode & (SCE_SNAP_MODE_NODE_X | SCE_SNAP_MODE_NODE_Y)) {
float loc[2];
float dist_px = SNAP_MIN_DISTANCE; /* Use a user defined value here. */
char node_border;
if (snapNodesTransform(t, t->mval, loc, &dist_px, &node_border)) {
copy_v2_v2(t->tsnap.snapPoint, loc);
t->tsnap.snapNodeBorder = node_border;
t->tsnap.status |= POINT_INIT;
}
else {
t->tsnap.status &= ~POINT_INIT;
}
}
}
static void snap_calc_sequencer_fn(TransInfo *t, float *UNUSED(vec))
{
BLI_assert(t->spacetype == SPACE_SEQ);
if (transform_snap_sequencer_calc(t)) {
t->tsnap.status |= (POINT_INIT | TARGET_INIT);
}
else {
t->tsnap.status &= ~(POINT_INIT | TARGET_INIT);
}
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Target
* \{ */
static void snap_target_median_impl(TransInfo *t, float r_median[3])
{
int i_accum = 0;
zero_v3(r_median);
FOREACH_TRANS_DATA_CONTAINER (t, tc) {
TransData *td = tc->data;
int i;
float v[3];
zero_v3(v);
for (i = 0; i < tc->data_len && td->flag & TD_SELECTED; i++, td++) {
add_v3_v3(v, td->center);
}
if (i == 0) {
/* Is this possible? */
continue;
}
mul_v3_fl(v, 1.0 / i);
if (tc->use_local_mat) {
mul_m4_v3(tc->mat, v);
}
add_v3_v3(r_median, v);
i_accum++;
}
mul_v3_fl(r_median, 1.0 / i_accum);
// TargetSnapOffset(t, NULL);
}
static void snap_target_grid_ensure(TransInfo *t)
{
/* Only need to calculate once. */
if ((t->tsnap.status & TARGET_GRID_INIT) == 0) {
if (t->data_type == TC_CURSOR_VIEW3D) {
/* Use a fallback when transforming the cursor.
* In this case the center is _not_ derived from the cursor which is being transformed. */
copy_v3_v3(t->tsnap.snapTargetGrid, TRANS_DATA_CONTAINER_FIRST_SINGLE(t)->data->iloc);
}
else if (t->around == V3D_AROUND_CURSOR) {
/* Use a fallback for cursor selection,
* this isn't useful as a global center for absolute grid snapping
* since its not based on the position of the selection. */
snap_target_median_impl(t, t->tsnap.snapTargetGrid);
}
else {
copy_v3_v3(t->tsnap.snapTargetGrid, t->center_global);
}
t->tsnap.status |= TARGET_GRID_INIT;
}
}
static void TargetSnapOffset(TransInfo *t, TransData *td)
{
if (t->spacetype == SPACE_NODE && td != NULL) {
bNode *node = td->extra;
char border = t->tsnap.snapNodeBorder;
float width = BLI_rctf_size_x(&node->totr);
float height = BLI_rctf_size_y(&node->totr);
#ifdef USE_NODE_CENTER
if (border & NODE_LEFT) {
t->tsnap.snapTarget[0] -= 0.5f * width;
}
if (border & NODE_RIGHT) {
t->tsnap.snapTarget[0] += 0.5f * width;
}
if (border & NODE_BOTTOM) {
t->tsnap.snapTarget[1] -= 0.5f * height;
}
if (border & NODE_TOP) {
t->tsnap.snapTarget[1] += 0.5f * height;
}
#else
if (border & NODE_LEFT) {
t->tsnap.snapTarget[0] -= 0.0f;
}
if (border & NODE_RIGHT) {
t->tsnap.snapTarget[0] += width;
}
if (border & NODE_BOTTOM) {
t->tsnap.snapTarget[1] -= height;
}
if (border & NODE_TOP) {
t->tsnap.snapTarget[1] += 0.0f;
}
#endif
}
}
static void TargetSnapCenter(TransInfo *t)
{
/* Only need to calculate once */
if ((t->tsnap.status & TARGET_INIT) == 0) {
copy_v3_v3(t->tsnap.snapTarget, t->center_global);
TargetSnapOffset(t, NULL);
t->tsnap.status |= TARGET_INIT;
}
}
static void TargetSnapActive(TransInfo *t)
{
/* Only need to calculate once */
if ((t->tsnap.status & TARGET_INIT) == 0) {
if (calculateCenterActive(t, true, t->tsnap.snapTarget)) {
TargetSnapOffset(t, NULL);
t->tsnap.status |= TARGET_INIT;
}
/* No active, default to median */
else {
t->tsnap.target = SCE_SNAP_TARGET_MEDIAN;
t->tsnap.targetSnap = TargetSnapMedian;
TargetSnapMedian(t);
}
}
}
static void TargetSnapMedian(TransInfo *t)
{
/* Only need to calculate once. */
if ((t->tsnap.status & TARGET_INIT) == 0) {
snap_target_median_impl(t, t->tsnap.snapTarget);
t->tsnap.status |= TARGET_INIT;
}
}
static void TargetSnapClosest(TransInfo *t)
{
/* Only valid if a snap point has been selected. */
if (t->tsnap.status & POINT_INIT) {
float dist_closest = 0.0f;
TransData *closest = NULL;
/* Object mode */
if (t->options & CTX_OBJECT) {
int i;
FOREACH_TRANS_DATA_CONTAINER (t, tc) {
TransData *td;
for (td = tc->data, i = 0; i < tc->data_len && td->flag & TD_SELECTED; i++, td++) {
const BoundBox *bb = NULL;
if ((t->options & CTX_OBMODE_XFORM_OBDATA) == 0) {
bb = BKE_object_boundbox_get(td->ob);
}
/* use boundbox if possible */
if (bb) {
int j;
for (j = 0; j < 8; j++) {
float loc[3];
float dist;
copy_v3_v3(loc, bb->vec[j]);
mul_m4_v3(td->ext->obmat, loc);
dist = t->tsnap.distance(t, loc, t->tsnap.snapPoint);
if ((dist != TRANSFORM_DIST_INVALID) &&
(closest == NULL || fabsf(dist) < fabsf(dist_closest))) {
copy_v3_v3(t->tsnap.snapTarget, loc);
closest = td;
dist_closest = dist;
}
}
}
/* use element center otherwise */
else {
float loc[3];
float dist;
copy_v3_v3(loc, td->center);
dist = t->tsnap.distance(t, loc, t->tsnap.snapPoint);
if ((dist != TRANSFORM_DIST_INVALID) &&
(closest == NULL || fabsf(dist) < fabsf(dist_closest))) {
copy_v3_v3(t->tsnap.snapTarget, loc);
closest = td;
}
}
}
}
}
else {
FOREACH_TRANS_DATA_CONTAINER (t, tc) {
TransData *td = tc->data;
int i;
for (i = 0; i < tc->data_len && td->flag & TD_SELECTED; i++, td++) {
float loc[3];
float dist;
copy_v3_v3(loc, td->center);
if (tc->use_local_mat) {
mul_m4_v3(tc->mat, loc);
}
dist = t->tsnap.distance(t, loc, t->tsnap.snapPoint);
if ((dist != TRANSFORM_DIST_INVALID) &&
(closest == NULL || fabsf(dist) < fabsf(dist_closest))) {
copy_v3_v3(t->tsnap.snapTarget, loc);
closest = td;
dist_closest = dist;
}
}
}
}
TargetSnapOffset(t, closest);
t->tsnap.status |= TARGET_INIT;
}
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Snap Objects
* \{ */
short snapObjectsTransform(
TransInfo *t, const float mval[2], float *dist_px, float r_loc[3], float r_no[3])
{
float *target = (t->tsnap.status & TARGET_INIT) ? t->tsnap.snapTarget : t->center_global;
return ED_transform_snap_object_project_view3d_ex(
t->tsnap.object_context,
t->depsgraph,
t->region,
t->view,
t->settings->snap_mode,
&(const struct SnapObjectParams){
.snap_select = t->tsnap.modeSelect,
.edit_mode_type = (t->flag & T_EDIT) != 0 ? SNAP_GEOM_EDIT : SNAP_GEOM_FINAL,
.use_occlusion_test = t->settings->snap_mode != SCE_SNAP_MODE_FACE,
.use_backface_culling = t->tsnap.use_backface_culling,
},
mval,
target,
dist_px,
r_loc,
r_no,
NULL,
NULL,
NULL);
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Peeling
* \{ */
bool peelObjectsTransform(TransInfo *t,
const float mval[2],
const bool use_peel_object,
/* return args */
float r_loc[3],
float r_no[3],
float *r_thickness)
{
ListBase depths_peel = {0};
ED_transform_snap_object_project_all_view3d_ex(
t->tsnap.object_context,
t->depsgraph,
t->region,
t->view,
&(const struct SnapObjectParams){
.snap_select = t->tsnap.modeSelect,
.edit_mode_type = (t->flag & T_EDIT) != 0 ? SNAP_GEOM_EDIT : SNAP_GEOM_FINAL,
},
mval,
-1.0f,
false,
&depths_peel);
if (!BLI_listbase_is_empty(&depths_peel)) {
/* At the moment we only use the hits of the first object */
struct SnapObjectHitDepth *hit_min = depths_peel.first;
for (struct SnapObjectHitDepth *iter = hit_min->next; iter; iter = iter->next) {
if (iter->depth < hit_min->depth) {
hit_min = iter;
}
}
struct SnapObjectHitDepth *hit_max = NULL;
if (use_peel_object) {
/* if peeling objects, take the first and last from each object */
hit_max = hit_min;
for (struct SnapObjectHitDepth *iter = depths_peel.first; iter; iter = iter->next) {
if ((iter->depth > hit_max->depth) && (iter->ob_uuid == hit_min->ob_uuid)) {
hit_max = iter;
}
}
}
else {
/* otherwise, pair first with second and so on */
for (struct SnapObjectHitDepth *iter = depths_peel.first; iter; iter = iter->next) {
if ((iter != hit_min) && (iter->ob_uuid == hit_min->ob_uuid)) {
if (hit_max == NULL) {
hit_max = iter;
}
else if (iter->depth < hit_max->depth) {
hit_max = iter;
}
}
}
/* in this case has only one hit. treat as raycast */
if (hit_max == NULL) {
hit_max = hit_min;
}
}
mid_v3_v3v3(r_loc, hit_min->co, hit_max->co);
if (r_thickness) {
*r_thickness = hit_max->depth - hit_min->depth;
}
/* XXX, is there a correct normal in this case ???, for now just z up */
r_no[0] = 0.0;
r_no[1] = 0.0;
r_no[2] = 1.0;
BLI_freelistN(&depths_peel);
return true;
}
return false;
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name snap Nodes
* \{ */
static bool snapNodeTest(View2D *v2d, bNode *node, eSnapSelect snap_select)
{
/* node is use for snapping only if a) snap mode matches and b) node is inside the view */
return ((snap_select == SNAP_NOT_SELECTED && !(node->flag & NODE_SELECT)) ||
(snap_select == SNAP_ALL && !(node->flag & NODE_ACTIVE))) &&
(node->totr.xmin < v2d->cur.xmax && node->totr.xmax > v2d->cur.xmin &&
node->totr.ymin < v2d->cur.ymax && node->totr.ymax > v2d->cur.ymin);
}
static NodeBorder snapNodeBorder(int snap_node_mode)
{
NodeBorder flag = 0;
if (snap_node_mode & SCE_SNAP_MODE_NODE_X) {
flag |= NODE_LEFT | NODE_RIGHT;
}
if (snap_node_mode & SCE_SNAP_MODE_NODE_Y) {
flag |= NODE_TOP | NODE_BOTTOM;
}
return flag;
}
static bool snapNode(ToolSettings *ts,
SpaceNode *UNUSED(snode),
ARegion *region,
bNode *node,
const int mval[2],
float r_loc[2],
float *r_dist_px,
char *r_node_border)
{
View2D *v2d = &region->v2d;
NodeBorder border = snapNodeBorder(ts->snap_node_mode);
bool retval = false;
rcti totr;
int new_dist;
UI_view2d_view_to_region_rcti(v2d, &node->totr, &totr);
if (border & NODE_LEFT) {
new_dist = abs(totr.xmin - mval[0]);
if (new_dist < *r_dist_px) {
UI_view2d_region_to_view(v2d, totr.xmin, mval[1], &r_loc[0], &r_loc[1]);
*r_dist_px = new_dist;
*r_node_border = NODE_LEFT;
retval = true;
}
}
if (border & NODE_RIGHT) {
new_dist = abs(totr.xmax - mval[0]);
if (new_dist < *r_dist_px) {
UI_view2d_region_to_view(v2d, totr.xmax, mval[1], &r_loc[0], &r_loc[1]);
*r_dist_px = new_dist;
*r_node_border = NODE_RIGHT;
retval = true;
}
}
if (border & NODE_BOTTOM) {
new_dist = abs(totr.ymin - mval[1]);
if (new_dist < *r_dist_px) {
UI_view2d_region_to_view(v2d, mval[0], totr.ymin, &r_loc[0], &r_loc[1]);
*r_dist_px = new_dist;
*r_node_border = NODE_BOTTOM;
retval = true;
}
}
if (border & NODE_TOP) {
new_dist = abs(totr.ymax - mval[1]);
if (new_dist < *r_dist_px) {
UI_view2d_region_to_view(v2d, mval[0], totr.ymax, &r_loc[0], &r_loc[1]);
*r_dist_px = new_dist;
*r_node_border = NODE_TOP;
retval = true;
}
}
return retval;
}
static bool snapNodes(ToolSettings *ts,
SpaceNode *snode,
ARegion *region,
const int mval[2],
eSnapSelect snap_select,
float r_loc[2],
float *r_dist_px,
char *r_node_border)
{
bNodeTree *ntree = snode->edittree;
bNode *node;
bool retval = false;
*r_node_border = 0;
for (node = ntree->nodes.first; node; node = node->next) {
if (snapNodeTest(&region->v2d, node, snap_select)) {
retval |= snapNode(ts, snode, region, node, mval, r_loc, r_dist_px, r_node_border);
}
}
return retval;
}
bool snapNodesTransform(
TransInfo *t, const int mval[2], float r_loc[2], float *r_dist_px, char *r_node_border)
{
return snapNodes(t->settings,
t->area->spacedata.first,
t->region,
mval,
t->tsnap.modeSelect,
r_loc,
r_dist_px,
r_node_border);
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name snap Grid
* \{ */
static void snap_grid_apply(
TransInfo *t, const int max_index, const float grid_dist, const float loc[3], float r_out[3])
{
BLI_assert(max_index <= 2);
snap_target_grid_ensure(t);
const float *center_global = t->tsnap.snapTargetGrid;
const float *asp = t->aspect;
float in[3];
if (t->con.mode & CON_APPLY) {
BLI_assert(t->tsnap.snapElem == 0);
t->con.applyVec(t, NULL, NULL, loc, in);
}
else {
copy_v3_v3(in, loc);
}
for (int i = 0; i <= max_index; i++) {
const float iter_fac = grid_dist * asp[i];
r_out[i] = iter_fac * roundf((in[i] + center_global[i]) / iter_fac) - center_global[i];
}
}
bool transform_snap_grid(TransInfo *t, float *val)
{
if (!activeSnap(t)) {
return false;
}
if ((!(t->tsnap.mode & SCE_SNAP_MODE_GRID)) || validSnap(t)) {
/* Don't do grid snapping if there is a valid snap point. */
return false;
}
/* Don't do grid snapping if not in 3D viewport or UV editor */
if (!ELEM(t->spacetype, SPACE_VIEW3D, SPACE_IMAGE)) {
return false;
}
if (t->mode != TFM_TRANSLATION) {
return false;
}
float grid_dist = (t->modifiers & MOD_PRECISION) ? t->snap[1] : t->snap[0];
/* Early bailing out if no need to snap */
if (grid_dist == 0.0f) {
return false;
}
snap_grid_apply(t, t->idx_max, grid_dist, val, val);
t->tsnap.snapElem = SCE_SNAP_MODE_GRID;
return true;
}
static void snap_increment_apply_ex(const TransInfo *UNUSED(t),
const int max_index,
const float increment_val,
const float aspect[3],
const float loc[3],
float r_out[3])
{
/* relative snapping in fixed increments */
for (int i = 0; i <= max_index; i++) {
const float iter_fac = increment_val * aspect[i];
r_out[i] = iter_fac * roundf(loc[i] / iter_fac);
}
}
static void snap_increment_apply(const TransInfo *t,
const int max_index,
const float increment_dist,
float *r_val)
{
BLI_assert((t->tsnap.mode & SCE_SNAP_MODE_INCREMENT) || doForceIncrementSnap(t));
BLI_assert(max_index <= 2);
/* Early bailing out if no need to snap */
if (increment_dist == 0.0f) {
return;
}
float asp_local[3] = {1, 1, 1};
const bool use_aspect = ELEM(t->mode, TFM_TRANSLATION);
const float *asp = use_aspect ? t->aspect : asp_local;
if (use_aspect) {
/* custom aspect for fcurve */
if (t->spacetype == SPACE_GRAPH) {
View2D *v2d = &t->region->v2d;
Scene *scene = t->scene;
SpaceGraph *sipo = t->area->spacedata.first;
asp_local[0] = UI_view2d_grid_resolution_x__frames_or_seconds(
v2d, scene, sipo->flag & SIPO_DRAWTIME);
asp_local[1] = UI_view2d_grid_resolution_y__values(v2d);
asp = asp_local;
}
}
snap_increment_apply_ex(t, max_index, increment_dist, asp, r_val, r_val);
}
bool transform_snap_increment_ex(const TransInfo *t, bool use_local_space, float *r_val)
{
if (!activeSnap(t)) {
return false;
}
if (!(t->tsnap.mode & SCE_SNAP_MODE_INCREMENT) && !doForceIncrementSnap(t)) {
return false;
}
if (t->spacetype != SPACE_VIEW3D && validSnap(t)) {
/* Only do something if using absolute or incremental grid snapping
* and there is no valid snap point. */
return false;
}
if (use_local_space) {
BLI_assert(t->idx_max == 2);
mul_m3_v3(t->spacemtx_inv, r_val);
}
float increment_dist = (t->modifiers & MOD_PRECISION) ? t->snap[1] : t->snap[0];
snap_increment_apply(t, t->idx_max, increment_dist, r_val);
if (use_local_space) {
mul_m3_v3(t->spacemtx, r_val);
}
return true;
}
bool transform_snap_increment(const TransInfo *t, float *r_val)
{
return transform_snap_increment_ex(t, false, r_val);
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Generic callbacks
* \{ */
float transform_snap_distance_len_squared_fn(TransInfo *UNUSED(t),
const float p1[3],
const float p2[3])
{
return len_squared_v3v3(p1, p2);
}
/** \} */
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