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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2001-2002 NaN Holding BV. All rights reserved. */
/** \file
* \ingroup edtransform
*/
#include <stdlib.h>
#include "BLI_math.h"
#include "BLI_task.h"
#include "BKE_context.h"
#include "BKE_image.h"
#include "BKE_unit.h"
#include "ED_screen.h"
#include "UI_interface.h"
#include "transform.h"
#include "transform_constraints.h"
#include "transform_convert.h"
#include "transform_mode.h"
#include "transform_snap.h"
/* -------------------------------------------------------------------- */
/** \name Transform (Resize) Element
* \{ */
struct ElemResizeData {
const TransInfo *t;
const TransDataContainer *tc;
float mat[3][3];
};
static void element_resize_fn(void *__restrict iter_data_v,
const int iter,
const TaskParallelTLS *__restrict UNUSED(tls))
{
struct ElemResizeData *data = iter_data_v;
TransData *td = &data->tc->data[iter];
if (td->flag & TD_SKIP) {
return;
}
ElementResize(data->t, data->tc, td, data->mat);
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Transform (Resize)
* \{ */
static float ResizeBetween(TransInfo *t, const float p1[3], const float p2[3])
{
float d1[3], d2[3], len_d1;
sub_v3_v3v3(d1, p1, t->center_global);
sub_v3_v3v3(d2, p2, t->center_global);
if (t->con.applyRot != NULL && (t->con.mode & CON_APPLY)) {
mul_m3_v3(t->con.pmtx, d1);
mul_m3_v3(t->con.pmtx, d2);
}
project_v3_v3v3(d1, d1, d2);
len_d1 = len_v3(d1);
/* Use 'invalid' dist when `center == p1` (after projecting),
* in this case scale will _never_ move the point in relation to the center,
* so it makes no sense to take it into account when scaling. see: T46503 */
return len_d1 != 0.0f ? len_v3(d2) / len_d1 : TRANSFORM_DIST_INVALID;
}
static void ApplySnapResize(TransInfo *t, float vec[3])
{
float point[3];
getSnapPoint(t, point);
float dist = ResizeBetween(t, t->tsnap.snapTarget, point);
if (dist != TRANSFORM_DIST_INVALID) {
copy_v3_fl(vec, dist);
}
}
/**
* Find the correction for the scaling factor when "Constrain to Bounds" is active.
* \param numerator: How far the UV boundary (unit square) is from the origin of the scale.
* \param denominator: How far the AABB is from the origin of the scale.
* \param scale: Scale parameter to update.
*/
static void constrain_scale_to_boundary(const float numerator,
const float denominator,
float *scale)
{
if (denominator == 0.0f) {
/* The origin of the scale is on the edge of the boundary. */
if (numerator < 0.0f) {
/* Negative scale will wrap around and put us outside the boundary. */
*scale = 0.0f; /* Hold at the boundary instead. */
}
return; /* Nothing else we can do without more info. */
}
const float correction = numerator / denominator;
if (correction < 0.0f || !isfinite(correction)) {
/* TODO: Correction is negative or invalid, but we lack context to fix `*scale`. */
return;
}
if (denominator < 0.0f) {
/* Scale origin is outside boundary, only make scale bigger. */
if (*scale < correction) {
*scale = correction;
}
return;
}
/* Scale origin is inside boundary, the "regular" case, limit maximum scale. */
if (*scale > correction) {
*scale = correction;
}
}
static bool clip_uv_transform_resize(TransInfo *t, float vec[2])
{
/* Stores the coordinates of the closest UDIM tile.
* Also acts as an offset to the tile from the origin of UV space. */
float base_offset[2] = {0.0f, 0.0f};
/* If tiled image then constrain to correct/closest UDIM tile, else 0-1 UV space. */
const SpaceImage *sima = t->area->spacedata.first;
BKE_image_find_nearest_tile_with_offset(sima->image, t->center_global, base_offset);
/* Assume no change is required. */
float scale = 1.0f;
/* Are we scaling U and V together, or just one axis? */
const bool adjust_u = !(t->con.mode & CON_AXIS1);
const bool adjust_v = !(t->con.mode & CON_AXIS0);
const bool use_local_center = transdata_check_local_center(t, t->around);
FOREACH_TRANS_DATA_CONTAINER (t, tc) {
for (TransData *td = tc->data; td < tc->data + tc->data_len; td++) {
/* Get scale origin. */
const float *scale_origin = use_local_center ? td->center : t->center_global;
/* Alias td->loc as min and max just in case we need to optimize later. */
const float *min = td->loc;
const float *max = td->loc;
if (adjust_u) {
/* Update U against the left border. */
constrain_scale_to_boundary(
scale_origin[0] - base_offset[0], scale_origin[0] - min[0], &scale);
/* Now the right border, negated, because `-1.0 / -1.0 = 1.0` */
constrain_scale_to_boundary(
base_offset[0] + t->aspect[0] - scale_origin[0], max[0] - scale_origin[0], &scale);
}
/* Do the same for the V co-ordinate. */
if (adjust_v) {
constrain_scale_to_boundary(
scale_origin[1] - base_offset[1], scale_origin[1] - min[1], &scale);
constrain_scale_to_boundary(
base_offset[1] + t->aspect[1] - scale_origin[1], max[1] - scale_origin[1], &scale);
}
}
}
vec[0] *= scale;
vec[1] *= scale;
return scale != 1.0f;
}
static void applyResize(TransInfo *t, const int UNUSED(mval[2]))
{
float mat[3][3];
int i;
char str[UI_MAX_DRAW_STR];
if (t->flag & T_INPUT_IS_VALUES_FINAL) {
copy_v3_v3(t->values_final, t->values);
}
else {
float ratio = t->values[0];
copy_v3_fl(t->values_final, ratio);
add_v3_v3(t->values_final, t->values_modal_offset);
transform_snap_increment(t, t->values_final);
if (applyNumInput(&t->num, t->values_final)) {
constraintNumInput(t, t->values_final);
}
applySnappingAsGroup(t, t->values_final);
}
size_to_mat3(mat, t->values_final);
if (t->con.mode & CON_APPLY) {
t->con.applySize(t, NULL, NULL, mat);
/* Only so we have re-usable value with redo. */
float pvec[3] = {0.0f, 0.0f, 0.0f};
int j = 0;
for (i = 0; i < 3; i++) {
if (!(t->con.mode & (CON_AXIS0 << i))) {
t->values_final[i] = 1.0f;
}
else {
pvec[j++] = t->values_final[i];
}
}
headerResize(t, pvec, str, sizeof(str));
}
else {
headerResize(t, t->values_final, str, sizeof(str));
}
copy_m3_m3(t->mat, mat); /* used in gizmo */
FOREACH_TRANS_DATA_CONTAINER (t, tc) {
if (tc->data_len < TRANSDATA_THREAD_LIMIT) {
TransData *td = tc->data;
for (i = 0; i < tc->data_len; i++, td++) {
if (td->flag & TD_SKIP) {
continue;
}
ElementResize(t, tc, td, mat);
}
}
else {
struct ElemResizeData data = {
.t = t,
.tc = tc,
};
copy_m3_m3(data.mat, mat);
TaskParallelSettings settings;
BLI_parallel_range_settings_defaults(&settings);
BLI_task_parallel_range(0, tc->data_len, &data, element_resize_fn, &settings);
}
}
/* Evil hack - redo resize if clipping needed. */
if (t->flag & T_CLIP_UV && clip_uv_transform_resize(t, t->values_final)) {
size_to_mat3(mat, t->values_final);
if (t->con.mode & CON_APPLY) {
t->con.applySize(t, NULL, NULL, mat);
}
FOREACH_TRANS_DATA_CONTAINER (t, tc) {
TransData *td = tc->data;
for (i = 0; i < tc->data_len; i++, td++) {
ElementResize(t, tc, td, mat);
}
/* In proportional edit it can happen that */
/* vertices in the radius of the brush end */
/* outside the clipping area */
/* XXX HACK - dg */
if (t->flag & T_PROP_EDIT) {
clipUVData(t);
}
}
}
recalcData(t);
ED_area_status_text(t->area, str);
}
void initResize(TransInfo *t, float mouse_dir_constraint[3])
{
t->mode = TFM_RESIZE;
t->transform = applyResize;
t->handleEvent = NULL;
t->tsnap.applySnap = ApplySnapResize;
t->tsnap.distance = ResizeBetween;
if (is_zero_v3(mouse_dir_constraint)) {
initMouseInputMode(t, &t->mouse, INPUT_SPRING_FLIP);
}
else {
int mval_start[2], mval_end[2];
float mval_dir[3], t_mval[2];
float viewmat[3][3];
copy_m3_m4(viewmat, t->viewmat);
mul_v3_m3v3(mval_dir, viewmat, mouse_dir_constraint);
normalize_v2(mval_dir);
if (is_zero_v2(mval_dir)) {
/* The screen space direction is orthogonal to the view.
* Fall back to constraining on the Y axis. */
mval_dir[0] = 0;
mval_dir[1] = 1;
}
mval_start[0] = t->center2d[0];
mval_start[1] = t->center2d[1];
t_mval[0] = t->mval[0] - mval_start[0];
t_mval[1] = t->mval[1] - mval_start[1];
project_v2_v2v2(mval_dir, t_mval, mval_dir);
mval_end[0] = t->center2d[0] + mval_dir[0];
mval_end[1] = t->center2d[1] + mval_dir[1];
setCustomPoints(t, &t->mouse, mval_end, mval_start);
initMouseInputMode(t, &t->mouse, INPUT_CUSTOM_RATIO);
}
t->flag |= T_NULL_ONE;
t->num.val_flag[0] |= NUM_NULL_ONE;
t->num.val_flag[1] |= NUM_NULL_ONE;
t->num.val_flag[2] |= NUM_NULL_ONE;
t->num.flag |= NUM_AFFECT_ALL;
if ((t->flag & T_EDIT) == 0) {
#ifdef USE_NUM_NO_ZERO
t->num.val_flag[0] |= NUM_NO_ZERO;
t->num.val_flag[1] |= NUM_NO_ZERO;
t->num.val_flag[2] |= NUM_NO_ZERO;
#endif
}
t->idx_max = 2;
t->num.idx_max = 2;
t->snap[0] = 0.1f;
t->snap[1] = t->snap[0] * 0.1f;
copy_v3_fl(t->num.val_inc, t->snap[0]);
t->num.unit_sys = t->scene->unit.system;
t->num.unit_type[0] = B_UNIT_NONE;
t->num.unit_type[1] = B_UNIT_NONE;
t->num.unit_type[2] = B_UNIT_NONE;
transform_mode_default_modal_orientation_set(t, V3D_ORIENT_GLOBAL);
}
/** \} */
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