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e12c08e8d170b7ca40f204a5b0423c23a9fbc2c1
blender-archive/intern/cycles/blender/blender_curves.cpp
Campbell Barton e12c08e8d1 ClangFormat: apply to source, most of intern 
Apply clang format as proposed in T53211.

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2019-04-17 06:21:24 +02:00

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/*
* Copyright 2011-2013 Blender Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "render/attribute.h"
#include "render/camera.h"
#include "render/curves.h"
#include "render/mesh.h"
#include "render/object.h"
#include "render/scene.h"
#include "blender/blender_sync.h"
#include "blender/blender_util.h"
#include "util/util_foreach.h"
#include "util/util_hash.h"
#include "util/util_logging.h"
CCL_NAMESPACE_BEGIN
ParticleCurveData::ParticleCurveData()
{
}
ParticleCurveData::~ParticleCurveData()
{
}
static void interp_weights(float t, float data[4])
{
/* Cardinal curve interpolation */
float t2 = t * t;
float t3 = t2 * t;
float fc = 0.71f;
data[0] = -fc * t3 + 2.0f * fc * t2 - fc * t;
data[1] = (2.0f - fc) * t3 + (fc - 3.0f) * t2 + 1.0f;
data[2] = (fc - 2.0f) * t3 + (3.0f - 2.0f * fc) * t2 + fc * t;
data[3] = fc * t3 - fc * t2;
}
static void curveinterp_v3_v3v3v3v3(
float3 *p, float3 *v1, float3 *v2, float3 *v3, float3 *v4, const float w[4])
{
p->x = v1->x * w[0] + v2->x * w[1] + v3->x * w[2] + v4->x * w[3];
p->y = v1->y * w[0] + v2->y * w[1] + v3->y * w[2] + v4->y * w[3];
p->z = v1->z * w[0] + v2->z * w[1] + v3->z * w[2] + v4->z * w[3];
}
static float shaperadius(float shape, float root, float tip, float time)
{
assert(time >= 0.0f);
assert(time <= 1.0f);
float radius = 1.0f - time;
if (shape != 0.0f) {
if (shape < 0.0f)
radius = powf(radius, 1.0f + shape);
else
radius = powf(radius, 1.0f / (1.0f - shape));
}
return (radius * (root - tip)) + tip;
}
/* curve functions */
static void InterpolateKeySegments(
int seg, int segno, int key, int curve, float3 *keyloc, float *time, ParticleCurveData *CData)
{
float3 ckey_loc1 = CData->curvekey_co[key];
float3 ckey_loc2 = ckey_loc1;
float3 ckey_loc3 = CData->curvekey_co[key + 1];
float3 ckey_loc4 = ckey_loc3;
if (key > CData->curve_firstkey[curve])
ckey_loc1 = CData->curvekey_co[key - 1];
if (key < CData->curve_firstkey[curve] + CData->curve_keynum[curve] - 2)
ckey_loc4 = CData->curvekey_co[key + 2];
float time1 = CData->curvekey_time[key] / CData->curve_length[curve];
float time2 = CData->curvekey_time[key + 1] / CData->curve_length[curve];
float dfra = (time2 - time1) / (float)segno;
if (time)
*time = (dfra * seg) + time1;
float t[4];
interp_weights((float)seg / (float)segno, t);
if (keyloc)
curveinterp_v3_v3v3v3v3(keyloc, &ckey_loc1, &ckey_loc2, &ckey_loc3, &ckey_loc4, t);
}
static bool ObtainCacheParticleData(
Mesh *mesh, BL::Mesh *b_mesh, BL::Object *b_ob, ParticleCurveData *CData, bool background)
{
int curvenum = 0;
int keyno = 0;
if (!(mesh && b_mesh && b_ob && CData))
return false;
Transform tfm = get_transform(b_ob->matrix_world());
Transform itfm = transform_quick_inverse(tfm);
BL::Object::modifiers_iterator b_mod;
for (b_ob->modifiers.begin(b_mod); b_mod != b_ob->modifiers.end(); ++b_mod) {
if ((b_mod->type() == b_mod->type_PARTICLE_SYSTEM) &&
(background ? b_mod->show_render() : b_mod->show_viewport())) {
BL::ParticleSystemModifier psmd((const PointerRNA)b_mod->ptr);
BL::ParticleSystem b_psys((const PointerRNA)psmd.particle_system().ptr);
BL::ParticleSettings b_part((const PointerRNA)b_psys.settings().ptr);
if ((b_part.render_type() == BL::ParticleSettings::render_type_PATH) &&
(b_part.type() == BL::ParticleSettings::type_HAIR)) {
int shader = clamp(b_part.material() - 1, 0, mesh->used_shaders.size() - 1);
int display_step = background ? b_part.render_step() : b_part.display_step();
int totparts = b_psys.particles.length();
int totchild = background ? b_psys.child_particles.length() :
(int)((float)b_psys.child_particles.length() *
(float)b_part.display_percentage() / 100.0f);
int totcurves = totchild;
if (b_part.child_type() == 0 || totchild == 0)
totcurves += totparts;
if (totcurves == 0)
continue;
int ren_step = (1 << display_step) + 1;
if (b_part.kink() == BL::ParticleSettings::kink_SPIRAL)
ren_step += b_part.kink_extra_steps();
CData->psys_firstcurve.push_back_slow(curvenum);
CData->psys_curvenum.push_back_slow(totcurves);
CData->psys_shader.push_back_slow(shader);
float radius = b_part.radius_scale() * 0.5f;
CData->psys_rootradius.push_back_slow(radius * b_part.root_radius());
CData->psys_tipradius.push_back_slow(radius * b_part.tip_radius());
CData->psys_shape.push_back_slow(b_part.shape());
CData->psys_closetip.push_back_slow(b_part.use_close_tip());
int pa_no = 0;
if (!(b_part.child_type() == 0) && totchild != 0)
pa_no = totparts;
int num_add = (totparts + totchild - pa_no);
CData->curve_firstkey.reserve(CData->curve_firstkey.size() + num_add);
CData->curve_keynum.reserve(CData->curve_keynum.size() + num_add);
CData->curve_length.reserve(CData->curve_length.size() + num_add);
CData->curvekey_co.reserve(CData->curvekey_co.size() + num_add * ren_step);
CData->curvekey_time.reserve(CData->curvekey_time.size() + num_add * ren_step);
for (; pa_no < totparts + totchild; pa_no++) {
int keynum = 0;
CData->curve_firstkey.push_back_slow(keyno);
float curve_length = 0.0f;
float3 pcKey;
for (int step_no = 0; step_no < ren_step; step_no++) {
float nco[3];
b_psys.co_hair(*b_ob, pa_no, step_no, nco);
float3 cKey = make_float3(nco[0], nco[1], nco[2]);
cKey = transform_point(&itfm, cKey);
if (step_no > 0) {
const float step_length = len(cKey - pcKey);
curve_length += step_length;
}
CData->curvekey_co.push_back_slow(cKey);
CData->curvekey_time.push_back_slow(curve_length);
pcKey = cKey;
keynum++;
}
keyno += keynum;
CData->curve_keynum.push_back_slow(keynum);
CData->curve_length.push_back_slow(curve_length);
curvenum++;
}
}
}
}
return true;
}
static bool ObtainCacheParticleUV(Mesh *mesh,
BL::Mesh *b_mesh,
BL::Object *b_ob,
ParticleCurveData *CData,
bool background,
int uv_num)
{
if (!(mesh && b_mesh && b_ob && CData))
return false;
CData->curve_uv.clear();
BL::Object::modifiers_iterator b_mod;
for (b_ob->modifiers.begin(b_mod); b_mod != b_ob->modifiers.end(); ++b_mod) {
if ((b_mod->type() == b_mod->type_PARTICLE_SYSTEM) &&
(background ? b_mod->show_render() : b_mod->show_viewport())) {
BL::ParticleSystemModifier psmd((const PointerRNA)b_mod->ptr);
BL::ParticleSystem b_psys((const PointerRNA)psmd.particle_system().ptr);
BL::ParticleSettings b_part((const PointerRNA)b_psys.settings().ptr);
if ((b_part.render_type() == BL::ParticleSettings::render_type_PATH) &&
(b_part.type() == BL::ParticleSettings::type_HAIR)) {
int totparts = b_psys.particles.length();
int totchild = background ? b_psys.child_particles.length() :
(int)((float)b_psys.child_particles.length() *
(float)b_part.display_percentage() / 100.0f);
int totcurves = totchild;
if (b_part.child_type() == 0 || totchild == 0)
totcurves += totparts;
if (totcurves == 0)
continue;
int pa_no = 0;
if (!(b_part.child_type() == 0) && totchild != 0)
pa_no = totparts;
int num_add = (totparts + totchild - pa_no);
CData->curve_uv.reserve(CData->curve_uv.size() + num_add);
BL::ParticleSystem::particles_iterator b_pa;
b_psys.particles.begin(b_pa);
for (; pa_no < totparts + totchild; pa_no++) {
/* Add UVs */
BL::Mesh::uv_layers_iterator l;
b_mesh->uv_layers.begin(l);
float2 uv = make_float2(0.0f, 0.0f);
if (b_mesh->uv_layers.length())
b_psys.uv_on_emitter(psmd, *b_pa, pa_no, uv_num, &uv.x);
CData->curve_uv.push_back_slow(uv);
if (pa_no < totparts && b_pa != b_psys.particles.end())
++b_pa;
}
}
}
}
return true;
}
static bool ObtainCacheParticleVcol(Mesh *mesh,
BL::Mesh *b_mesh,
BL::Object *b_ob,
ParticleCurveData *CData,
bool background,
int vcol_num)
{
if (!(mesh && b_mesh && b_ob && CData))
return false;
CData->curve_vcol.clear();
BL::Object::modifiers_iterator b_mod;
for (b_ob->modifiers.begin(b_mod); b_mod != b_ob->modifiers.end(); ++b_mod) {
if ((b_mod->type() == b_mod->type_PARTICLE_SYSTEM) &&
(background ? b_mod->show_render() : b_mod->show_viewport())) {
BL::ParticleSystemModifier psmd((const PointerRNA)b_mod->ptr);
BL::ParticleSystem b_psys((const PointerRNA)psmd.particle_system().ptr);
BL::ParticleSettings b_part((const PointerRNA)b_psys.settings().ptr);
if ((b_part.render_type() == BL::ParticleSettings::render_type_PATH) &&
(b_part.type() == BL::ParticleSettings::type_HAIR)) {
int totparts = b_psys.particles.length();
int totchild = background ? b_psys.child_particles.length() :
(int)((float)b_psys.child_particles.length() *
(float)b_part.display_percentage() / 100.0f);
int totcurves = totchild;
if (b_part.child_type() == 0 || totchild == 0)
totcurves += totparts;
if (totcurves == 0)
continue;
int pa_no = 0;
if (!(b_part.child_type() == 0) && totchild != 0)
pa_no = totparts;
int num_add = (totparts + totchild - pa_no);
CData->curve_vcol.reserve(CData->curve_vcol.size() + num_add);
BL::ParticleSystem::particles_iterator b_pa;
b_psys.particles.begin(b_pa);
for (; pa_no < totparts + totchild; pa_no++) {
/* Add vertex colors */
BL::Mesh::vertex_colors_iterator l;
b_mesh->vertex_colors.begin(l);
float3 vcol = make_float3(0.0f, 0.0f, 0.0f);
if (b_mesh->vertex_colors.length())
b_psys.mcol_on_emitter(psmd, *b_pa, pa_no, vcol_num, &vcol.x);
CData->curve_vcol.push_back_slow(vcol);
if (pa_no < totparts && b_pa != b_psys.particles.end())
++b_pa;
}
}
}
}
return true;
}
static void ExportCurveTrianglePlanes(Mesh *mesh,
ParticleCurveData *CData,
float3 RotCam,
bool is_ortho)
{
int vertexno = mesh->verts.size();
int vertexindex = vertexno;
int numverts = 0, numtris = 0;
/* compute and reserve size of arrays */
for (int sys = 0; sys < CData->psys_firstcurve.size(); sys++) {
for (int curve = CData->psys_firstcurve[sys];
curve < CData->psys_firstcurve[sys] + CData->psys_curvenum[sys];
curve++) {
numverts += 2 + (CData->curve_keynum[curve] - 1) * 2;
numtris += (CData->curve_keynum[curve] - 1) * 2;
}
}
mesh->reserve_mesh(mesh->verts.size() + numverts, mesh->num_triangles() + numtris);
/* actually export */
for (int sys = 0; sys < CData->psys_firstcurve.size(); sys++) {
for (int curve = CData->psys_firstcurve[sys];
curve < CData->psys_firstcurve[sys] + CData->psys_curvenum[sys];
curve++) {
float3 xbasis;
float3 v1;
float time = 0.0f;
float3 ickey_loc = CData->curvekey_co[CData->curve_firstkey[curve]];
float radius = shaperadius(
CData->psys_shape[sys], CData->psys_rootradius[sys], CData->psys_tipradius[sys], 0.0f);
v1 = CData->curvekey_co[CData->curve_firstkey[curve] + 1] -
CData->curvekey_co[CData->curve_firstkey[curve]];
if (is_ortho)
xbasis = normalize(cross(RotCam, v1));
else
xbasis = normalize(cross(RotCam - ickey_loc, v1));
float3 ickey_loc_shfl = ickey_loc - radius * xbasis;
float3 ickey_loc_shfr = ickey_loc + radius * xbasis;
mesh->add_vertex(ickey_loc_shfl);
mesh->add_vertex(ickey_loc_shfr);
vertexindex += 2;
for (int curvekey = CData->curve_firstkey[curve] + 1;
curvekey < CData->curve_firstkey[curve] + CData->curve_keynum[curve];
curvekey++) {
ickey_loc = CData->curvekey_co[curvekey];
if (curvekey == CData->curve_firstkey[curve] + CData->curve_keynum[curve] - 1)
v1 = CData->curvekey_co[curvekey] -
CData->curvekey_co[max(curvekey - 1, CData->curve_firstkey[curve])];
else
v1 = CData->curvekey_co[curvekey + 1] - CData->curvekey_co[curvekey - 1];
time = CData->curvekey_time[curvekey] / CData->curve_length[curve];
radius = shaperadius(
CData->psys_shape[sys], CData->psys_rootradius[sys], CData->psys_tipradius[sys], time);
if (curvekey == CData->curve_firstkey[curve] + CData->curve_keynum[curve] - 1)
radius = shaperadius(CData->psys_shape[sys],
CData->psys_rootradius[sys],
CData->psys_tipradius[sys],
0.95f);
if (CData->psys_closetip[sys] &&
(curvekey == CData->curve_firstkey[curve] + CData->curve_keynum[curve] - 1))
radius = shaperadius(CData->psys_shape[sys], CData->psys_rootradius[sys], 0.0f, 0.95f);
if (is_ortho)
xbasis = normalize(cross(RotCam, v1));
else
xbasis = normalize(cross(RotCam - ickey_loc, v1));
float3 ickey_loc_shfl = ickey_loc - radius * xbasis;
float3 ickey_loc_shfr = ickey_loc + radius * xbasis;
mesh->add_vertex(ickey_loc_shfl);
mesh->add_vertex(ickey_loc_shfr);
mesh->add_triangle(
vertexindex - 2, vertexindex, vertexindex - 1, CData->psys_shader[sys], true);
mesh->add_triangle(
vertexindex + 1, vertexindex - 1, vertexindex, CData->psys_shader[sys], true);
vertexindex += 2;
}
}
}
mesh->resize_mesh(mesh->verts.size(), mesh->num_triangles());
mesh->attributes.remove(ATTR_STD_VERTEX_NORMAL);
mesh->attributes.remove(ATTR_STD_FACE_NORMAL);
mesh->add_face_normals();
mesh->add_vertex_normals();
mesh->attributes.remove(ATTR_STD_FACE_NORMAL);
/* texture coords still needed */
}
static void ExportCurveTriangleGeometry(Mesh *mesh, ParticleCurveData *CData, int resolution)
{
int vertexno = mesh->verts.size();
int vertexindex = vertexno;
int numverts = 0, numtris = 0;
/* compute and reserve size of arrays */
for (int sys = 0; sys < CData->psys_firstcurve.size(); sys++) {
for (int curve = CData->psys_firstcurve[sys];
curve < CData->psys_firstcurve[sys] + CData->psys_curvenum[sys];
curve++) {
numverts += (CData->curve_keynum[curve] - 1) * resolution + resolution;
numtris += (CData->curve_keynum[curve] - 1) * 2 * resolution;
}
}
mesh->reserve_mesh(mesh->verts.size() + numverts, mesh->num_triangles() + numtris);
/* actually export */
for (int sys = 0; sys < CData->psys_firstcurve.size(); sys++) {
for (int curve = CData->psys_firstcurve[sys];
curve < CData->psys_firstcurve[sys] + CData->psys_curvenum[sys];
curve++) {
float3 firstxbasis = cross(make_float3(1.0f, 0.0f, 0.0f),
CData->curvekey_co[CData->curve_firstkey[curve] + 1] -
CData->curvekey_co[CData->curve_firstkey[curve]]);
if (!is_zero(firstxbasis))
firstxbasis = normalize(firstxbasis);
else
firstxbasis = normalize(cross(make_float3(0.0f, 1.0f, 0.0f),
CData->curvekey_co[CData->curve_firstkey[curve] + 1] -
CData->curvekey_co[CData->curve_firstkey[curve]]));
for (int curvekey = CData->curve_firstkey[curve];
curvekey < CData->curve_firstkey[curve] + CData->curve_keynum[curve] - 1;
curvekey++) {
float3 xbasis = firstxbasis;
float3 v1;
float3 v2;
if (curvekey == CData->curve_firstkey[curve]) {
v1 = CData->curvekey_co[min(
curvekey + 2, CData->curve_firstkey[curve] + CData->curve_keynum[curve] - 1)] -
CData->curvekey_co[curvekey + 1];
v2 = CData->curvekey_co[curvekey + 1] - CData->curvekey_co[curvekey];
}
else if (curvekey == CData->curve_firstkey[curve] + CData->curve_keynum[curve] - 1) {
v1 = CData->curvekey_co[curvekey] - CData->curvekey_co[curvekey - 1];
v2 = CData->curvekey_co[curvekey - 1] -
CData->curvekey_co[max(curvekey - 2, CData->curve_firstkey[curve])];
}
else {
v1 = CData->curvekey_co[curvekey + 1] - CData->curvekey_co[curvekey];
v2 = CData->curvekey_co[curvekey] - CData->curvekey_co[curvekey - 1];
}
xbasis = cross(v1, v2);
if (len_squared(xbasis) >= 0.05f * len_squared(v1) * len_squared(v2)) {
firstxbasis = normalize(xbasis);
break;
}
}
for (int curvekey = CData->curve_firstkey[curve];
curvekey < CData->curve_firstkey[curve] + CData->curve_keynum[curve] - 1;
curvekey++) {
int subv = 1;
float3 xbasis;
float3 ybasis;
float3 v1;
float3 v2;
if (curvekey == CData->curve_firstkey[curve]) {
subv = 0;
v1 = CData->curvekey_co[min(
curvekey + 2, CData->curve_firstkey[curve] + CData->curve_keynum[curve] - 1)] -
CData->curvekey_co[curvekey + 1];
v2 = CData->curvekey_co[curvekey + 1] - CData->curvekey_co[curvekey];
}
else if (curvekey == CData->curve_firstkey[curve] + CData->curve_keynum[curve] - 1) {
v1 = CData->curvekey_co[curvekey] - CData->curvekey_co[curvekey - 1];
v2 = CData->curvekey_co[curvekey - 1] -
CData->curvekey_co[max(curvekey - 2, CData->curve_firstkey[curve])];
}
else {
v1 = CData->curvekey_co[curvekey + 1] - CData->curvekey_co[curvekey];
v2 = CData->curvekey_co[curvekey] - CData->curvekey_co[curvekey - 1];
}
xbasis = cross(v1, v2);
if (len_squared(xbasis) >= 0.05f * len_squared(v1) * len_squared(v2)) {
xbasis = normalize(xbasis);
firstxbasis = xbasis;
}
else
xbasis = firstxbasis;
ybasis = normalize(cross(xbasis, v2));
for (; subv <= 1; subv++) {
float3 ickey_loc = make_float3(0.0f, 0.0f, 0.0f);
float time = 0.0f;
InterpolateKeySegments(subv, 1, curvekey, curve, &ickey_loc, &time, CData);
float radius = shaperadius(CData->psys_shape[sys],
CData->psys_rootradius[sys],
CData->psys_tipradius[sys],
time);
if ((curvekey == CData->curve_firstkey[curve] + CData->curve_keynum[curve] - 2) &&
(subv == 1))
radius = shaperadius(CData->psys_shape[sys],
CData->psys_rootradius[sys],
CData->psys_tipradius[sys],
0.95f);
if (CData->psys_closetip[sys] && (subv == 1) &&
(curvekey == CData->curve_firstkey[curve] + CData->curve_keynum[curve] - 2))
radius = shaperadius(CData->psys_shape[sys], CData->psys_rootradius[sys], 0.0f, 0.95f);
float angle = M_2PI_F / (float)resolution;
for (int section = 0; section < resolution; section++) {
float3 ickey_loc_shf = ickey_loc + radius * (cosf(angle * section) * xbasis +
sinf(angle * section) * ybasis);
mesh->add_vertex(ickey_loc_shf);
}
if (subv != 0) {
for (int section = 0; section < resolution - 1; section++) {
mesh->add_triangle(vertexindex - resolution + section,
vertexindex + section,
vertexindex - resolution + section + 1,
CData->psys_shader[sys],
true);
mesh->add_triangle(vertexindex + section + 1,
vertexindex - resolution + section + 1,
vertexindex + section,
CData->psys_shader[sys],
true);
}
mesh->add_triangle(vertexindex - 1,
vertexindex + resolution - 1,
vertexindex - resolution,
CData->psys_shader[sys],
true);
mesh->add_triangle(vertexindex,
vertexindex - resolution,
vertexindex + resolution - 1,
CData->psys_shader[sys],
true);
}
vertexindex += resolution;
}
}
}
}
mesh->resize_mesh(mesh->verts.size(), mesh->num_triangles());
mesh->attributes.remove(ATTR_STD_VERTEX_NORMAL);
mesh->attributes.remove(ATTR_STD_FACE_NORMAL);
mesh->add_face_normals();
mesh->add_vertex_normals();
mesh->attributes.remove(ATTR_STD_FACE_NORMAL);
/* texture coords still needed */
}
static void ExportCurveSegments(Scene *scene, Mesh *mesh, ParticleCurveData *CData)
{
int num_keys = 0;
int num_curves = 0;
if (mesh->num_curves())
return;
Attribute *attr_intercept = NULL;
Attribute *attr_random = NULL;
if (mesh->need_attribute(scene, ATTR_STD_CURVE_INTERCEPT))
attr_intercept = mesh->curve_attributes.add(ATTR_STD_CURVE_INTERCEPT);
if (mesh->need_attribute(scene, ATTR_STD_CURVE_RANDOM))
attr_random = mesh->curve_attributes.add(ATTR_STD_CURVE_RANDOM);
/* compute and reserve size of arrays */
for (int sys = 0; sys < CData->psys_firstcurve.size(); sys++) {
for (int curve = CData->psys_firstcurve[sys];
curve < CData->psys_firstcurve[sys] + CData->psys_curvenum[sys];
curve++) {
num_keys += CData->curve_keynum[curve];
num_curves++;
}
}
if (num_curves > 0) {
VLOG(1) << "Exporting curve segments for mesh " << mesh->name;
}
mesh->reserve_curves(mesh->num_curves() + num_curves, mesh->curve_keys.size() + num_keys);
num_keys = 0;
num_curves = 0;
/* actually export */
for (int sys = 0; sys < CData->psys_firstcurve.size(); sys++) {
for (int curve = CData->psys_firstcurve[sys];
curve < CData->psys_firstcurve[sys] + CData->psys_curvenum[sys];
curve++) {
size_t num_curve_keys = 0;
for (int curvekey = CData->curve_firstkey[curve];
curvekey < CData->curve_firstkey[curve] + CData->curve_keynum[curve];
curvekey++) {
const float3 ickey_loc = CData->curvekey_co[curvekey];
const float curve_time = CData->curvekey_time[curvekey];
const float curve_length = CData->curve_length[curve];
const float time = (curve_length > 0.0f) ? curve_time / curve_length : 0.0f;
float radius = shaperadius(
CData->psys_shape[sys], CData->psys_rootradius[sys], CData->psys_tipradius[sys], time);
if (CData->psys_closetip[sys] &&
(curvekey == CData->curve_firstkey[curve] + CData->curve_keynum[curve] - 1)) {
radius = 0.0f;
}
mesh->add_curve_key(ickey_loc, radius);
if (attr_intercept)
attr_intercept->add(time);
num_curve_keys++;
}
if (attr_random != NULL) {
attr_random->add(hash_int_01(num_curves));
}
mesh->add_curve(num_keys, CData->psys_shader[sys]);
num_keys += num_curve_keys;
num_curves++;
}
}
/* check allocation */
if ((mesh->curve_keys.size() != num_keys) || (mesh->num_curves() != num_curves)) {
VLOG(1) << "Allocation failed, clearing data";
mesh->clear();
}
}
static float4 CurveSegmentMotionCV(ParticleCurveData *CData, int sys, int curve, int curvekey)
{
const float3 ickey_loc = CData->curvekey_co[curvekey];
const float curve_time = CData->curvekey_time[curvekey];
const float curve_length = CData->curve_length[curve];
float time = (curve_length > 0.0f) ? curve_time / curve_length : 0.0f;
float radius = shaperadius(
CData->psys_shape[sys], CData->psys_rootradius[sys], CData->psys_tipradius[sys], time);
if (CData->psys_closetip[sys] &&
(curvekey == CData->curve_firstkey[curve] + CData->curve_keynum[curve] - 1))
radius = 0.0f;
/* curve motion keys store both position and radius in float4 */
float4 mP = float3_to_float4(ickey_loc);
mP.w = radius;
return mP;
}
static float4 LerpCurveSegmentMotionCV(ParticleCurveData *CData, int sys, int curve, float step)
{
assert(step >= 0.0f);
assert(step <= 1.0f);
const int first_curve_key = CData->curve_firstkey[curve];
const float curve_key_f = step * (CData->curve_keynum[curve] - 1);
int curvekey = (int)floorf(curve_key_f);
const float remainder = curve_key_f - curvekey;
if (remainder == 0.0f) {
return CurveSegmentMotionCV(CData, sys, curve, first_curve_key + curvekey);
}
int curvekey2 = curvekey + 1;
if (curvekey2 >= (CData->curve_keynum[curve] - 1)) {
curvekey2 = (CData->curve_keynum[curve] - 1);
curvekey = curvekey2 - 1;
}
const float4 mP = CurveSegmentMotionCV(CData, sys, curve, first_curve_key + curvekey);
const float4 mP2 = CurveSegmentMotionCV(CData, sys, curve, first_curve_key + curvekey2);
return lerp(mP, mP2, remainder);
}
static void ExportCurveSegmentsMotion(Mesh *mesh, ParticleCurveData *CData, int motion_step)
{
VLOG(1) << "Exporting curve motion segments for mesh " << mesh->name << ", motion step "
<< motion_step;
/* find attribute */
Attribute *attr_mP = mesh->curve_attributes.find(ATTR_STD_MOTION_VERTEX_POSITION);
bool new_attribute = false;
/* add new attribute if it doesn't exist already */
if (!attr_mP) {
VLOG(1) << "Creating new motion vertex position attribute";
attr_mP = mesh->curve_attributes.add(ATTR_STD_MOTION_VERTEX_POSITION);
new_attribute = true;
}
/* export motion vectors for curve keys */
size_t numkeys = mesh->curve_keys.size();
float4 *mP = attr_mP->data_float4() + motion_step * numkeys;
bool have_motion = false;
int i = 0;
int num_curves = 0;
for (int sys = 0; sys < CData->psys_firstcurve.size(); sys++) {
for (int curve = CData->psys_firstcurve[sys];
curve < CData->psys_firstcurve[sys] + CData->psys_curvenum[sys];
curve++) {
/* Curve lengths may not match! Curves can be clipped. */
int curve_key_end = (num_curves + 1 < (int)mesh->curve_first_key.size() ?
mesh->curve_first_key[num_curves + 1] :
(int)mesh->curve_keys.size());
const int num_center_curve_keys = curve_key_end - mesh->curve_first_key[num_curves];
const int is_num_keys_different = CData->curve_keynum[curve] - num_center_curve_keys;
if (!is_num_keys_different) {
for (int curvekey = CData->curve_firstkey[curve];
curvekey < CData->curve_firstkey[curve] + CData->curve_keynum[curve];
curvekey++) {
if (i < mesh->curve_keys.size()) {
mP[i] = CurveSegmentMotionCV(CData, sys, curve, curvekey);
if (!have_motion) {
/* unlike mesh coordinates, these tend to be slightly different
* between frames due to particle transforms into/out of object
* space, so we use an epsilon to detect actual changes */
float4 curve_key = float3_to_float4(mesh->curve_keys[i]);
curve_key.w = mesh->curve_radius[i];
if (len_squared(mP[i] - curve_key) > 1e-5f * 1e-5f)
have_motion = true;
}
}
i++;
}
}
else {
/* Number of keys has changed. Genereate an interpolated version
* to preserve motion blur. */
const float step_size = num_center_curve_keys > 1 ? 1.0f / (num_center_curve_keys - 1) :
0.0f;
for (int step_index = 0; step_index < num_center_curve_keys; ++step_index) {
const float step = step_index * step_size;
mP[i] = LerpCurveSegmentMotionCV(CData, sys, curve, step);
i++;
}
have_motion = true;
}
num_curves++;
}
}
/* in case of new attribute, we verify if there really was any motion */
if (new_attribute) {
if (i != numkeys || !have_motion) {
/* No motion or hair "topology" changed, remove attributes again. */
if (i != numkeys) {
VLOG(1) << "Hair topology changed, removing attribute.";
}
else {
VLOG(1) << "No motion, removing attribute.";
}
mesh->curve_attributes.remove(ATTR_STD_MOTION_VERTEX_POSITION);
}
else if (motion_step > 0) {
VLOG(1) << "Filling in new motion vertex position for motion_step " << motion_step;
/* motion, fill up previous steps that we might have skipped because
* they had no motion, but we need them anyway now */
for (int step = 0; step < motion_step; step++) {
float4 *mP = attr_mP->data_float4() + step * numkeys;
for (int key = 0; key < numkeys; key++) {
mP[key] = float3_to_float4(mesh->curve_keys[key]);
mP[key].w = mesh->curve_radius[key];
}
}
}
}
}
static void ExportCurveTriangleUV(ParticleCurveData *CData,
int vert_offset,
int resol,
float2 *uvdata)
{
if (uvdata == NULL)
return;
int vertexindex = vert_offset;
for (int sys = 0; sys < CData->psys_firstcurve.size(); sys++) {
for (int curve = CData->psys_firstcurve[sys];
curve < CData->psys_firstcurve[sys] + CData->psys_curvenum[sys];
curve++) {
for (int curvekey = CData->curve_firstkey[curve];
curvekey < CData->curve_firstkey[curve] + CData->curve_keynum[curve] - 1;
curvekey++) {
for (int section = 0; section < resol; section++) {
uvdata[vertexindex] = CData->curve_uv[curve];
vertexindex++;
uvdata[vertexindex] = CData->curve_uv[curve];
vertexindex++;
uvdata[vertexindex] = CData->curve_uv[curve];
vertexindex++;
uvdata[vertexindex] = CData->curve_uv[curve];
vertexindex++;
uvdata[vertexindex] = CData->curve_uv[curve];
vertexindex++;
uvdata[vertexindex] = CData->curve_uv[curve];
vertexindex++;
}
}
}
}
}
static void ExportCurveTriangleVcol(ParticleCurveData *CData,
int vert_offset,
int resol,
uchar4 *cdata)
{
if (cdata == NULL)
return;
int vertexindex = vert_offset;
for (int sys = 0; sys < CData->psys_firstcurve.size(); sys++) {
for (int curve = CData->psys_firstcurve[sys];
curve < CData->psys_firstcurve[sys] + CData->psys_curvenum[sys];
curve++) {
for (int curvekey = CData->curve_firstkey[curve];
curvekey < CData->curve_firstkey[curve] + CData->curve_keynum[curve] - 1;
curvekey++) {
for (int section = 0; section < resol; section++) {
/* Encode vertex color using the sRGB curve. */
cdata[vertexindex] = color_float_to_byte(
color_srgb_to_linear_v3(CData->curve_vcol[curve]));
vertexindex++;
cdata[vertexindex] = color_float_to_byte(
color_srgb_to_linear_v3(CData->curve_vcol[curve]));
vertexindex++;
cdata[vertexindex] = color_float_to_byte(
color_srgb_to_linear_v3(CData->curve_vcol[curve]));
vertexindex++;
cdata[vertexindex] = color_float_to_byte(
color_srgb_to_linear_v3(CData->curve_vcol[curve]));
vertexindex++;
cdata[vertexindex] = color_float_to_byte(
color_srgb_to_linear_v3(CData->curve_vcol[curve]));
vertexindex++;
cdata[vertexindex] = color_float_to_byte(
color_srgb_to_linear_v3(CData->curve_vcol[curve]));
vertexindex++;
}
}
}
}
}
/* Hair Curve Sync */
void BlenderSync::sync_curve_settings()
{
PointerRNA csscene = RNA_pointer_get(&b_scene.ptr, "cycles_curves");
CurveSystemManager *curve_system_manager = scene->curve_system_manager;
CurveSystemManager prev_curve_system_manager = *curve_system_manager;
curve_system_manager->use_curves = get_boolean(csscene, "use_curves");
curve_system_manager->minimum_width = get_float(csscene, "minimum_width");
curve_system_manager->maximum_width = get_float(csscene, "maximum_width");
curve_system_manager->primitive = (CurvePrimitiveType)get_enum(
csscene, "primitive", CURVE_NUM_PRIMITIVE_TYPES, CURVE_LINE_SEGMENTS);
curve_system_manager->curve_shape = (CurveShapeType)get_enum(
csscene, "shape", CURVE_NUM_SHAPE_TYPES, CURVE_THICK);
curve_system_manager->resolution = get_int(csscene, "resolution");
curve_system_manager->subdivisions = get_int(csscene, "subdivisions");
curve_system_manager->use_backfacing = !get_boolean(csscene, "cull_backfacing");
/* Triangles */
if (curve_system_manager->primitive == CURVE_TRIANGLES) {
/* camera facing planes */
if (curve_system_manager->curve_shape == CURVE_RIBBON) {
curve_system_manager->triangle_method = CURVE_CAMERA_TRIANGLES;
curve_system_manager->resolution = 1;
}
else if (curve_system_manager->curve_shape == CURVE_THICK) {
curve_system_manager->triangle_method = CURVE_TESSELATED_TRIANGLES;
}
}
/* Line Segments */
else if (curve_system_manager->primitive == CURVE_LINE_SEGMENTS) {
if (curve_system_manager->curve_shape == CURVE_RIBBON) {
/* tangent shading */
curve_system_manager->line_method = CURVE_UNCORRECTED;
curve_system_manager->use_encasing = true;
curve_system_manager->use_backfacing = false;
curve_system_manager->use_tangent_normal_geometry = true;
}
else if (curve_system_manager->curve_shape == CURVE_THICK) {
curve_system_manager->line_method = CURVE_ACCURATE;
curve_system_manager->use_encasing = false;
curve_system_manager->use_tangent_normal_geometry = false;
}
}
/* Curve Segments */
else if (curve_system_manager->primitive == CURVE_SEGMENTS) {
if (curve_system_manager->curve_shape == CURVE_RIBBON) {
curve_system_manager->primitive = CURVE_RIBBONS;
curve_system_manager->use_backfacing = false;
}
}
if (curve_system_manager->modified_mesh(prev_curve_system_manager)) {
BL::BlendData::objects_iterator b_ob;
for (b_data.objects.begin(b_ob); b_ob != b_data.objects.end(); ++b_ob) {
if (object_is_mesh(*b_ob)) {
BL::Object::particle_systems_iterator b_psys;
for (b_ob->particle_systems.begin(b_psys); b_psys != b_ob->particle_systems.end();
++b_psys) {
if ((b_psys->settings().render_type() == BL::ParticleSettings::render_type_PATH) &&
(b_psys->settings().type() == BL::ParticleSettings::type_HAIR)) {
BL::ID key = BKE_object_is_modified(*b_ob) ? *b_ob : b_ob->data();
mesh_map.set_recalc(key);
object_map.set_recalc(*b_ob);
}
}
}
}
}
if (curve_system_manager->modified(prev_curve_system_manager))
curve_system_manager->tag_update(scene);
}
void BlenderSync::sync_curves(
Mesh *mesh, BL::Mesh &b_mesh, BL::Object &b_ob, bool motion, int motion_step)
{
if (!motion) {
/* Clear stored curve data */
mesh->curve_keys.clear();
mesh->curve_radius.clear();
mesh->curve_first_key.clear();
mesh->curve_shader.clear();
mesh->curve_attributes.clear();
}
/* obtain general settings */
const bool use_curves = scene->curve_system_manager->use_curves;
if (!(use_curves && b_ob.mode() != b_ob.mode_PARTICLE_EDIT)) {
if (!motion)
mesh->compute_bounds();
return;
}
const int primitive = scene->curve_system_manager->primitive;
const int triangle_method = scene->curve_system_manager->triangle_method;
const int resolution = scene->curve_system_manager->resolution;
const size_t vert_num = mesh->verts.size();
const size_t tri_num = mesh->num_triangles();
int used_res = 1;
/* extract particle hair data - should be combined with connecting to mesh later*/
ParticleCurveData CData;
ObtainCacheParticleData(mesh, &b_mesh, &b_ob, &CData, !preview);
/* add hair geometry to mesh */
if (primitive == CURVE_TRIANGLES) {
if (triangle_method == CURVE_CAMERA_TRIANGLES) {
/* obtain camera parameters */
float3 RotCam;
Camera *camera = scene->camera;
Transform &ctfm = camera->matrix;
if (camera->type == CAMERA_ORTHOGRAPHIC) {
RotCam = -make_float3(ctfm.x.z, ctfm.y.z, ctfm.z.z);
}
else {
Transform tfm = get_transform(b_ob.matrix_world());
Transform itfm = transform_quick_inverse(tfm);
RotCam = transform_point(&itfm, make_float3(ctfm.x.w, ctfm.y.w, ctfm.z.w));
}
bool is_ortho = camera->type == CAMERA_ORTHOGRAPHIC;
ExportCurveTrianglePlanes(mesh, &CData, RotCam, is_ortho);
}
else {
ExportCurveTriangleGeometry(mesh, &CData, resolution);
used_res = resolution;
}
}
else {
if (motion)
ExportCurveSegmentsMotion(mesh, &CData, motion_step);
else
ExportCurveSegments(scene, mesh, &CData);
}
/* generated coordinates from first key. we should ideally get this from
* blender to handle deforming objects */
if (!motion) {
if (mesh->need_attribute(scene, ATTR_STD_GENERATED)) {
float3 loc, size;
mesh_texture_space(b_mesh, loc, size);
if (primitive == CURVE_TRIANGLES) {
Attribute *attr_generated = mesh->attributes.add(ATTR_STD_GENERATED);
float3 *generated = attr_generated->data_float3();
for (size_t i = vert_num; i < mesh->verts.size(); i++)
generated[i] = mesh->verts[i] * size - loc;
}
else {
Attribute *attr_generated = mesh->curve_attributes.add(ATTR_STD_GENERATED);
float3 *generated = attr_generated->data_float3();
for (size_t i = 0; i < mesh->num_curves(); i++) {
float3 co = mesh->curve_keys[mesh->get_curve(i).first_key];
generated[i] = co * size - loc;
}
}
}
}
/* create vertex color attributes */
if (!motion) {
BL::Mesh::vertex_colors_iterator l;
int vcol_num = 0;
for (b_mesh.vertex_colors.begin(l); l != b_mesh.vertex_colors.end(); ++l, vcol_num++) {
if (!mesh->need_attribute(scene, ustring(l->name().c_str())))
continue;
ObtainCacheParticleVcol(mesh, &b_mesh, &b_ob, &CData, !preview, vcol_num);
if (primitive == CURVE_TRIANGLES) {
Attribute *attr_vcol = mesh->attributes.add(
ustring(l->name().c_str()), TypeDesc::TypeColor, ATTR_ELEMENT_CORNER_BYTE);
uchar4 *cdata = attr_vcol->data_uchar4();
ExportCurveTriangleVcol(&CData, tri_num * 3, used_res, cdata);
}
else {
Attribute *attr_vcol = mesh->curve_attributes.add(
ustring(l->name().c_str()), TypeDesc::TypeColor, ATTR_ELEMENT_CURVE);
float3 *fdata = attr_vcol->data_float3();
if (fdata) {
size_t i = 0;
/* Encode vertex color using the sRGB curve. */
for (size_t curve = 0; curve < CData.curve_vcol.size(); curve++) {
fdata[i++] = color_srgb_to_linear_v3(CData.curve_vcol[curve]);
}
}
}
}
}
/* create UV attributes */
if (!motion) {
BL::Mesh::uv_layers_iterator l;
int uv_num = 0;
for (b_mesh.uv_layers.begin(l); l != b_mesh.uv_layers.end(); ++l, uv_num++) {
bool active_render = l->active_render();
AttributeStandard std = (active_render) ? ATTR_STD_UV : ATTR_STD_NONE;
ustring name = ustring(l->name().c_str());
/* UV map */
if (mesh->need_attribute(scene, name) || mesh->need_attribute(scene, std)) {
Attribute *attr_uv;
ObtainCacheParticleUV(mesh, &b_mesh, &b_ob, &CData, !preview, uv_num);
if (primitive == CURVE_TRIANGLES) {
if (active_render)
attr_uv = mesh->attributes.add(std, name);
else
attr_uv = mesh->attributes.add(name, TypeFloat2, ATTR_ELEMENT_CORNER);
float2 *uv = attr_uv->data_float2();
ExportCurveTriangleUV(&CData, tri_num * 3, used_res, uv);
}
else {
if (active_render)
attr_uv = mesh->curve_attributes.add(std, name);
else
attr_uv = mesh->curve_attributes.add(name, TypeFloat2, ATTR_ELEMENT_CURVE);
float2 *uv = attr_uv->data_float2();
if (uv) {
size_t i = 0;
for (size_t curve = 0; curve < CData.curve_uv.size(); curve++) {
uv[i++] = CData.curve_uv[curve];
}
}
}
}
}
}
mesh->compute_bounds();
}
CCL_NAMESPACE_END
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