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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2013 Blender Foundation. All rights reserved. */
/** \file
* \ingroup edsculpt
*
* Utility functions for getting vertex locations while painting
* (since they may be instanced multiple times in an evaluated mesh)
*/
#include "MEM_guardedalloc.h"
#include "BLI_math.h"
#include "DNA_mesh_types.h"
#include "DNA_object_types.h"
#include "BKE_context.h"
#include "BKE_customdata.h"
#include "BKE_mesh_iterators.h"
#include "BKE_mesh_runtime.h"
#include "DEG_depsgraph.h"
#include "DEG_depsgraph_query.h"
#include "ED_screen.h"
#include "ED_view3d.h"
#include "paint_intern.h" /* own include */
/* Opaque Structs for internal use */
/* stored while painting */
struct VertProjHandle {
CoNo *vcosnos;
bool use_update;
/* use for update */
float *dists_sq;
Object *ob;
Scene *scene;
};
/* only for passing to the callbacks */
struct VertProjUpdate {
struct VertProjHandle *vp_handle;
/* runtime */
ARegion *region;
const float *mval_fl;
};
/* -------------------------------------------------------------------- */
/* Internal Init */
static void vpaint_proj_dm_map_cosnos_init__map_cb(void *userData,
int index,
const float co[3],
const float no[3])
{
struct VertProjHandle *vp_handle = userData;
CoNo *co_no = &vp_handle->vcosnos[index];
/* check if we've been here before (normal should not be 0) */
if (!is_zero_v3(co_no->no)) {
/* remember that multiple dm verts share the same source vert */
vp_handle->use_update = true;
return;
}
copy_v3_v3(co_no->co, co);
copy_v3_v3(co_no->no, no);
}
static void vpaint_proj_dm_map_cosnos_init(struct Depsgraph *depsgraph,
Scene *UNUSED(scene),
Object *ob,
struct VertProjHandle *vp_handle)
{
Scene *scene_eval = DEG_get_evaluated_scene(depsgraph);
Object *ob_eval = DEG_get_evaluated_object(depsgraph, ob);
Mesh *me = ob->data;
CustomData_MeshMasks cddata_masks = CD_MASK_BAREMESH_ORIGINDEX;
Mesh *me_eval = mesh_get_eval_final(depsgraph, scene_eval, ob_eval, &cddata_masks);
memset(vp_handle->vcosnos, 0, sizeof(*vp_handle->vcosnos) * me->totvert);
BKE_mesh_foreach_mapped_vert(
me_eval, vpaint_proj_dm_map_cosnos_init__map_cb, vp_handle, MESH_FOREACH_USE_NORMAL);
}
/* -------------------------------------------------------------------- */
/* Internal Update */
/* Same as init but take mouse location into account */
static void vpaint_proj_dm_map_cosnos_update__map_cb(void *userData,
int index,
const float co[3],
const float no[3])
{
struct VertProjUpdate *vp_update = userData;
struct VertProjHandle *vp_handle = vp_update->vp_handle;
CoNo *co_no = &vp_handle->vcosnos[index];
/* find closest vertex */
{
/* first find distance to this vertex */
float co_ss[2]; /* screenspace */
if (ED_view3d_project_float_object(
vp_update->region, co, co_ss, V3D_PROJ_TEST_CLIP_BB | V3D_PROJ_TEST_CLIP_NEAR) ==
V3D_PROJ_RET_OK) {
const float dist_sq = len_squared_v2v2(vp_update->mval_fl, co_ss);
if (dist_sq > vp_handle->dists_sq[index]) {
/* bail out! */
return;
}
vp_handle->dists_sq[index] = dist_sq;
}
else if (vp_handle->dists_sq[index] != FLT_MAX) {
/* already initialized & couldn't project this 'co' */
return;
}
}
/* continue with regular functionality */
copy_v3_v3(co_no->co, co);
copy_v3_v3(co_no->no, no);
}
static void vpaint_proj_dm_map_cosnos_update(struct Depsgraph *depsgraph,
struct VertProjHandle *vp_handle,
ARegion *region,
const float mval_fl[2])
{
struct VertProjUpdate vp_update = {vp_handle, region, mval_fl};
Object *ob = vp_handle->ob;
Scene *scene_eval = DEG_get_evaluated_scene(depsgraph);
Object *ob_eval = DEG_get_evaluated_object(depsgraph, ob);
Mesh *me = ob->data;
CustomData_MeshMasks cddata_masks = CD_MASK_BAREMESH_ORIGINDEX;
Mesh *me_eval = mesh_get_eval_final(depsgraph, scene_eval, ob_eval, &cddata_masks);
/* quick sanity check - we shouldn't have to run this if there are no modifiers */
BLI_assert(BLI_listbase_is_empty(&ob->modifiers) == false);
copy_vn_fl(vp_handle->dists_sq, me->totvert, FLT_MAX);
BKE_mesh_foreach_mapped_vert(
me_eval, vpaint_proj_dm_map_cosnos_update__map_cb, &vp_update, MESH_FOREACH_USE_NORMAL);
}
/* -------------------------------------------------------------------- */
/* Public Functions */
struct VertProjHandle *ED_vpaint_proj_handle_create(struct Depsgraph *depsgraph,
Scene *scene,
Object *ob,
CoNo **r_vcosnos)
{
struct VertProjHandle *vp_handle = MEM_mallocN(sizeof(struct VertProjHandle), __func__);
Mesh *me = ob->data;
/* setup the handle */
vp_handle->vcosnos = MEM_mallocN(sizeof(CoNo) * me->totvert, "vertexcosnos map");
vp_handle->use_update = false;
/* sets 'use_update' if needed */
vpaint_proj_dm_map_cosnos_init(depsgraph, scene, ob, vp_handle);
if (vp_handle->use_update) {
vp_handle->dists_sq = MEM_mallocN(sizeof(float) * me->totvert, __func__);
vp_handle->ob = ob;
vp_handle->scene = scene;
}
else {
vp_handle->dists_sq = NULL;
vp_handle->ob = NULL;
vp_handle->scene = NULL;
}
*r_vcosnos = vp_handle->vcosnos;
return vp_handle;
}
void ED_vpaint_proj_handle_update(struct Depsgraph *depsgraph,
struct VertProjHandle *vp_handle,
ARegion *region,
const float mval_fl[2])
{
if (vp_handle->use_update) {
vpaint_proj_dm_map_cosnos_update(depsgraph, vp_handle, region, mval_fl);
}
}
void ED_vpaint_proj_handle_free(struct VertProjHandle *vp_handle)
{
if (vp_handle->use_update) {
MEM_freeN(vp_handle->dists_sq);
}
MEM_freeN(vp_handle->vcosnos);
MEM_freeN(vp_handle);
}
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