378 lines
13 KiB
C++
378 lines
13 KiB
C++
/* SPDX-FileCopyrightText: 2017 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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/** \file
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* \ingroup modifiers
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*/
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#include <cstdio>
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#include <cstring>
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#include "BLI_hash.h"
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#include "BLI_listbase.h"
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#include "BLI_math_base.h"
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#include "BLI_rand.h"
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#include "BLI_utildefines.h"
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#include "BLT_translation.hh"
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#include "DNA_defaults.h"
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#include "DNA_gpencil_legacy_types.h"
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#include "DNA_gpencil_modifier_types.h"
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#include "DNA_object_types.h"
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#include "DNA_screen_types.h"
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#include "BKE_gpencil_geom_legacy.h"
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#include "BKE_gpencil_modifier_legacy.h"
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#include "BKE_lib_query.hh"
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#include "BKE_modifier.hh"
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#include "MEM_guardedalloc.h"
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#include "UI_interface.hh"
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#include "UI_resources.hh"
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#include "RNA_access.hh"
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#include "MOD_gpencil_legacy_ui_common.h"
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#include "MOD_gpencil_legacy_util.h"
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#include "DEG_depsgraph.hh"
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#include "DEG_depsgraph_query.hh"
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static void init_data(GpencilModifierData *md)
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{
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LengthGpencilModifierData *gpmd = (LengthGpencilModifierData *)md;
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BLI_assert(MEMCMP_STRUCT_AFTER_IS_ZERO(gpmd, modifier));
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MEMCPY_STRUCT_AFTER(gpmd, DNA_struct_default_get(LengthGpencilModifierData), modifier);
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}
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static void copy_data(const GpencilModifierData *md, GpencilModifierData *target)
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{
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BKE_gpencil_modifier_copydata_generic(md, target);
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}
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static float *noise_table(int len, int offset, int seed)
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{
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float *table = static_cast<float *>(MEM_callocN(sizeof(float) * len, __func__));
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for (int i = 0; i < len; i++) {
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table[i] = BLI_hash_int_01(BLI_hash_int_2d(seed, i + offset + 1));
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}
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return table;
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}
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BLI_INLINE float table_sample(float *table, float x)
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{
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return interpf(table[int(ceilf(x))], table[int(floor(x))], fractf(x));
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}
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static bool gpencil_modify_stroke(bGPDstroke *gps,
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const float length,
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const float overshoot_fac,
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const short len_mode,
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const bool use_curvature,
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const int extra_point_count,
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const float segment_influence,
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const float max_angle,
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const bool invert_curvature)
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{
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bool changed = false;
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if (length == 0.0f) {
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return changed;
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}
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if (length > 0.0f) {
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changed = BKE_gpencil_stroke_stretch(gps,
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length,
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overshoot_fac,
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len_mode,
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use_curvature,
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extra_point_count,
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segment_influence,
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max_angle,
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invert_curvature);
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}
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else {
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changed = BKE_gpencil_stroke_shrink(gps, fabs(length), len_mode);
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}
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return changed;
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}
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static void applyLength(GpencilModifierData *md,
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Depsgraph *depsgraph,
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bGPdata *gpd,
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bGPDframe *gpf,
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bGPDstroke *gps,
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Object *ob)
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{
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bool changed = false;
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LengthGpencilModifierData *lmd = (LengthGpencilModifierData *)md;
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const float len = (lmd->mode == GP_LENGTH_ABSOLUTE) ? 1.0f :
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BKE_gpencil_stroke_length(gps, true);
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const int totpoints = gps->totpoints;
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if (len < FLT_EPSILON) {
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return;
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}
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/* Always do the stretching first since it might depend on points which could be deleted by the
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* shrink. */
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float first_fac = lmd->start_fac;
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int first_mode = 1;
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float second_fac = lmd->end_fac;
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int second_mode = 2;
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float rand[2] = {0.0f, 0.0f};
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if (lmd->rand_start_fac != 0.0 || lmd->rand_end_fac != 0.0) {
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int seed = lmd->seed;
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/* Make sure different modifiers get different seeds. */
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seed += BLI_hash_string(ob->id.name + 2);
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seed += BLI_hash_string(md->name);
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if (lmd->flag & GP_LENGTH_USE_RANDOM) {
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seed += int(DEG_get_ctime(depsgraph)) / lmd->step;
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}
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float rand_offset = BLI_hash_int_01(seed);
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/* Get stroke index for random offset. */
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int rnd_index = BLI_findindex(&gpf->strokes, gps);
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const uint primes[2] = {2, 3};
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double offset[2] = {0.0f, 0.0f};
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double r[2];
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float *noise_table_length = noise_table(4, int(floor(lmd->rand_offset)), seed + 2);
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/* To ensure a nice distribution, we use halton sequence and offset using the seed. */
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BLI_halton_2d(primes, offset, rnd_index, r);
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for (int j = 0; j < 2; j++) {
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float noise = table_sample(noise_table_length, j * 2 + fractf(lmd->rand_offset));
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rand[j] = fmodf(r[j] + rand_offset, 1.0f);
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rand[j] = fabs(fmodf(sin(rand[j] * 12.9898f + j * 78.233f) * 43758.5453f, 1.0f) + noise);
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}
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MEM_SAFE_FREE(noise_table_length);
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first_fac = first_fac + rand[0] * lmd->rand_start_fac;
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second_fac = second_fac + rand[1] * lmd->rand_end_fac;
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}
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if (first_fac < 0) {
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std::swap(first_fac, second_fac);
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std::swap(first_mode, second_mode);
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}
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const int first_extra_point_count = ceil(first_fac * lmd->point_density);
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const int second_extra_point_count = ceil(second_fac * lmd->point_density);
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changed |= gpencil_modify_stroke(gps,
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len * first_fac,
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lmd->overshoot_fac,
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first_mode,
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lmd->flag & GP_LENGTH_USE_CURVATURE,
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first_extra_point_count,
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lmd->segment_influence,
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lmd->max_angle,
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lmd->flag & GP_LENGTH_INVERT_CURVATURE);
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/* HACK: The second #overshoot_fac needs to be adjusted because it is not
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* done in the same stretch call, because it can have a different length.
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* The adjustment needs to be stable when
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* `ceil(overshoot_fac*(gps->totpoints - 2))` is used in stretch and never
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* produce a result higher than `totpoints - 2`. */
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const float second_overshoot_fac = lmd->overshoot_fac * (totpoints - 2) /
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(float(gps->totpoints) - 2) *
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(1.0f - 0.1f / (totpoints - 1.0f));
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changed |= gpencil_modify_stroke(gps,
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len * second_fac,
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second_overshoot_fac,
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second_mode,
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lmd->flag & GP_LENGTH_USE_CURVATURE,
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second_extra_point_count,
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lmd->segment_influence,
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lmd->max_angle,
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lmd->flag & GP_LENGTH_INVERT_CURVATURE);
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if (changed) {
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BKE_gpencil_stroke_geometry_update(gpd, gps);
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}
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}
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static void deform_stroke(GpencilModifierData *md,
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Depsgraph *depsgraph,
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Object *ob,
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bGPDlayer *gpl,
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bGPDframe *gpf,
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bGPDstroke *gps)
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{
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bGPdata *gpd = static_cast<bGPdata *>(ob->data);
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LengthGpencilModifierData *lmd = (LengthGpencilModifierData *)md;
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if (!is_stroke_affected_by_modifier(ob,
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lmd->layername,
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lmd->material,
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lmd->pass_index,
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lmd->layer_pass,
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1,
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gpl,
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gps,
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lmd->flag & GP_LENGTH_INVERT_LAYER,
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lmd->flag & GP_LENGTH_INVERT_PASS,
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lmd->flag & GP_LENGTH_INVERT_LAYERPASS,
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lmd->flag & GP_LENGTH_INVERT_MATERIAL))
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{
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return;
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}
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if ((gps->flag & GP_STROKE_CYCLIC) != 0) {
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/* Don't affect cyclic strokes as they have no start/end. */
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return;
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}
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applyLength(md, depsgraph, gpd, gpf, gps, ob);
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}
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static void bake_modifier(Main * /*bmain*/,
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Depsgraph *depsgraph,
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GpencilModifierData *md,
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Object *ob)
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{
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generic_bake_deform_stroke(depsgraph, md, ob, false, deform_stroke);
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}
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static void foreach_ID_link(GpencilModifierData *md, Object *ob, IDWalkFunc walk, void *user_data)
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{
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LengthGpencilModifierData *mmd = (LengthGpencilModifierData *)md;
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walk(user_data, ob, (ID **)&mmd->material, IDWALK_CB_USER);
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}
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static void random_header_draw(const bContext * /*C*/, Panel *panel)
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{
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uiLayout *layout = panel->layout;
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PointerRNA *ptr = gpencil_modifier_panel_get_property_pointers(panel, nullptr);
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uiItemR(layout, ptr, "use_random", UI_ITEM_NONE, IFACE_("Randomize"), ICON_NONE);
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}
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static void random_panel_draw(const bContext * /*C*/, Panel *panel)
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{
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uiLayout *layout = panel->layout;
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PointerRNA *ptr = gpencil_modifier_panel_get_property_pointers(panel, nullptr);
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uiLayoutSetPropSep(layout, true);
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uiLayoutSetActive(layout, RNA_boolean_get(ptr, "use_random"));
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uiItemR(layout, ptr, "step", UI_ITEM_NONE, nullptr, ICON_NONE);
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}
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static void offset_panel_draw(const bContext * /*C*/, Panel *panel)
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{
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uiLayout *layout = panel->layout;
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PointerRNA *ptr = gpencil_modifier_panel_get_property_pointers(panel, nullptr);
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uiLayoutSetPropSep(layout, true);
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uiItemR(
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layout, ptr, "random_start_factor", UI_ITEM_NONE, IFACE_("Random Offset Start"), ICON_NONE);
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uiItemR(layout, ptr, "random_end_factor", UI_ITEM_NONE, IFACE_("Random Offset End"), ICON_NONE);
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uiItemR(layout, ptr, "random_offset", UI_ITEM_NONE, nullptr, ICON_NONE);
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uiItemR(layout, ptr, "seed", UI_ITEM_NONE, nullptr, ICON_NONE);
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}
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static void panel_draw(const bContext * /*C*/, Panel *panel)
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{
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uiLayout *layout = panel->layout;
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PointerRNA *ptr = gpencil_modifier_panel_get_property_pointers(panel, nullptr);
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uiLayoutSetPropSep(layout, true);
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uiItemR(layout, ptr, "mode", UI_ITEM_NONE, nullptr, ICON_NONE);
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uiLayout *col = uiLayoutColumn(layout, true);
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if (RNA_enum_get(ptr, "mode") == GP_LENGTH_RELATIVE) {
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uiItemR(col, ptr, "start_factor", UI_ITEM_NONE, IFACE_("Start"), ICON_NONE);
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uiItemR(col, ptr, "end_factor", UI_ITEM_NONE, IFACE_("End"), ICON_NONE);
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}
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else {
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uiItemR(col, ptr, "start_length", UI_ITEM_NONE, IFACE_("Start"), ICON_NONE);
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uiItemR(col, ptr, "end_length", UI_ITEM_NONE, IFACE_("End"), ICON_NONE);
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}
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uiItemR(layout, ptr, "overshoot_factor", UI_ITEM_R_SLIDER, IFACE_("Used Length"), ICON_NONE);
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gpencil_modifier_panel_end(layout, ptr);
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}
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static void mask_panel_draw(const bContext * /*C*/, Panel *panel)
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{
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gpencil_modifier_masking_panel_draw(panel, true, false);
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}
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static void curvature_header_draw(const bContext * /*C*/, Panel *panel)
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{
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uiLayout *layout = panel->layout;
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PointerRNA *ptr = gpencil_modifier_panel_get_property_pointers(panel, nullptr);
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uiItemR(layout, ptr, "use_curvature", UI_ITEM_NONE, IFACE_("Curvature"), ICON_NONE);
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}
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static void curvature_panel_draw(const bContext * /*C*/, Panel *panel)
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{
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uiLayout *layout = panel->layout;
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PointerRNA *ptr = gpencil_modifier_panel_get_property_pointers(panel, nullptr);
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uiLayoutSetPropSep(layout, true);
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uiLayout *col = uiLayoutColumn(layout, false);
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uiLayoutSetActive(col, RNA_boolean_get(ptr, "use_curvature"));
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uiItemR(col, ptr, "point_density", UI_ITEM_NONE, nullptr, ICON_NONE);
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uiItemR(col, ptr, "segment_influence", UI_ITEM_NONE, nullptr, ICON_NONE);
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uiItemR(col, ptr, "max_angle", UI_ITEM_NONE, nullptr, ICON_NONE);
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uiItemR(col, ptr, "invert_curvature", UI_ITEM_NONE, IFACE_("Invert"), ICON_NONE);
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}
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static void panel_register(ARegionType *region_type)
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{
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PanelType *panel_type = gpencil_modifier_panel_register(
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region_type, eGpencilModifierType_Length, panel_draw);
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gpencil_modifier_subpanel_register(
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region_type, "curvature", "", curvature_header_draw, curvature_panel_draw, panel_type);
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PanelType *offset_panel = gpencil_modifier_subpanel_register(
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region_type, "offset", "Random Offsets", nullptr, offset_panel_draw, panel_type);
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gpencil_modifier_subpanel_register(
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region_type, "randomize", "", random_header_draw, random_panel_draw, offset_panel);
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gpencil_modifier_subpanel_register(
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region_type, "mask", "Influence", nullptr, mask_panel_draw, panel_type);
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}
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GpencilModifierTypeInfo modifierType_Gpencil_Length = {
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/*name*/ N_("Length"),
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/*struct_name*/ "LengthGpencilModifierData",
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/*struct_size*/ sizeof(LengthGpencilModifierData),
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/*type*/ eGpencilModifierTypeType_Gpencil,
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/*flags*/ eGpencilModifierTypeFlag_SupportsEditmode,
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/*copy_data*/ copy_data,
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/*deform_stroke*/ deform_stroke,
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/*generate_strokes*/ nullptr,
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/*bake_modifier*/ bake_modifier,
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/*remap_time*/ nullptr,
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/*init_data*/ init_data,
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/*free_data*/ nullptr,
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/*is_disabled*/ nullptr,
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/*update_depsgraph*/ nullptr,
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/*depends_on_time*/ nullptr,
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/*foreach_ID_link*/ foreach_ID_link,
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/*foreach_tex_link*/ nullptr,
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/*panel_register*/ panel_register,
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};
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