archive/blender-archive
Archived
1
1
Fork 0
Code Pull Requests Packages Activity
This repository has been archived on 2023-10-09. You can view files and clone it, but cannot push or open issues or pull requests.
Files
28604c46a137c1288cc7a494b36ed72e44a0ab8b
blender-archive/intern/cycles/blender/blender_curves.cpp
Sergey Sharybin 28604c46a1 Cycles: Make Blender importer more forward compatible 
Basically the idea is to make code robust against extending
enum options in the future by falling back to a known safe
default setting when RNA is set to something unknown.

While this approach solves the issues similar to T47377,
but it wouldn't really help when/if any of the RNA values
gets ever deprecated and removed. There'll be no simple
solution to that apart from defining explicit mapping from
RNA value to Cycles one.

Another part which isn't so great actually is that we now
have to have some enum guards and give some explicit values
to the enum items, but we can live with that perhaps.

Reviewers: dingto, juicyfruit, lukasstockner97, brecht

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D1785
2016-02-12 15:27:33 +01:00

1054 lines
38 KiB
C++
Raw Blame History

/*
* 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 "attribute.h"
#include "camera.h"
#include "curves.h"
#include "mesh.h"
#include "object.h"
#include "scene.h"
#include "blender_sync.h"
#include "blender_util.h"
#include "util_foreach.h"
#include "util_logging.h"
CCL_NAMESPACE_BEGIN
/* Utilities */
/* Hair curve functions */
void curveinterp_v3_v3v3v3v3(float3 *p, float3 *v1, float3 *v2, float3 *v3, float3 *v4, const float w[4]);
void interp_weights(float t, float data[4]);
float shaperadius(float shape, float root, float tip, float time);
void InterpolateKeySegments(int seg, int segno, int key, int curve, float3 *keyloc, float *time, ParticleCurveData *CData);
bool ObtainCacheParticleUV(Mesh *mesh, BL::Mesh *b_mesh, BL::Object *b_ob, ParticleCurveData *CData, bool background, int uv_num);
bool ObtainCacheParticleVcol(Mesh *mesh, BL::Mesh *b_mesh, BL::Object *b_ob, ParticleCurveData *CData, bool background, int vcol_num);
bool ObtainCacheParticleData(Mesh *mesh, BL::Mesh *b_mesh, BL::Object *b_ob, ParticleCurveData *CData, bool background);
void ExportCurveSegments(Scene *scene, Mesh *mesh, ParticleCurveData *CData);
void ExportCurveTrianglePlanes(Mesh *mesh, ParticleCurveData *CData,
float3 RotCam, bool is_ortho);
void ExportCurveTriangleGeometry(Mesh *mesh, ParticleCurveData *CData, int resolution);
void ExportCurveTriangleUV(ParticleCurveData *CData, int vert_offset, int resol, float3 *uvdata);
void ExportCurveTriangleVcol(ParticleCurveData *CData, int vert_offset, int resol, uchar4 *cdata);
ParticleCurveData::ParticleCurveData()
{
}
ParticleCurveData::~ParticleCurveData()
{
}
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;
}
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];
}
float shaperadius(float shape, float root, float tip, float time)
{
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 */
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);
}
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 mi = clamp(b_part.material()-1, 0, mesh->used_shaders.size()-1);
int shader = mesh->used_shaders[mi];
int draw_step = background ? b_part.render_step() : b_part.draw_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.draw_percentage() / 100.0f);
int totcurves = totchild;
if(b_part.child_type() == 0 || totchild == 0)
totcurves += totparts;
if(totcurves == 0)
continue;
int ren_step = (1 << draw_step) + 1;
if(b_part.kink() == BL::ParticleSettings::kink_SPIRAL)
ren_step += b_part.kink_extra_steps();
PointerRNA cpsys = RNA_pointer_get(&b_part.ptr, "cycles");
CData->psys_firstcurve.push_back(curvenum);
CData->psys_curvenum.push_back(totcurves);
CData->psys_shader.push_back(shader);
float radius = get_float(cpsys, "radius_scale") * 0.5f;
CData->psys_rootradius.push_back(radius * get_float(cpsys, "root_width"));
CData->psys_tipradius.push_back(radius * get_float(cpsys, "tip_width"));
CData->psys_shape.push_back(get_float(cpsys, "shape"));
CData->psys_closetip.push_back(get_boolean(cpsys, "use_closetip"));
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(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) {
float step_length = len(cKey - pcKey);
if(step_length == 0.0f)
continue;
curve_length += step_length;
}
CData->curvekey_co.push_back(cKey);
CData->curvekey_time.push_back(curve_length);
pcKey = cKey;
keynum++;
}
keyno += keynum;
CData->curve_keynum.push_back(keynum);
CData->curve_length.push_back(curve_length);
curvenum++;
}
}
}
}
return true;
}
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.draw_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::tessface_uv_textures_iterator l;
b_mesh->tessface_uv_textures.begin(l);
float3 uv = make_float3(0.0f, 0.0f, 0.0f);
if(b_mesh->tessface_uv_textures.length())
b_psys.uv_on_emitter(psmd, *b_pa, pa_no, uv_num, &uv.x);
CData->curve_uv.push_back(uv);
if(pa_no < totparts && b_pa != b_psys.particles.end())
++b_pa;
}
}
}
}
return true;
}
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.draw_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::tessface_vertex_colors_iterator l;
b_mesh->tessface_vertex_colors.begin(l);
float3 vcol = make_float3(0.0f, 0.0f, 0.0f);
if(b_mesh->tessface_vertex_colors.length())
b_psys.mcol_on_emitter(psmd, *b_pa, pa_no, vcol_num, &vcol.x);
CData->curve_vcol.push_back(vcol);
if(pa_no < totparts && b_pa != b_psys.particles.end())
++b_pa;
}
}
}
}
return true;
}
static void set_resolution(BL::Object *b_ob, BL::Scene *scene, bool render)
{
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) && ((b_mod->show_viewport()) || (b_mod->show_render()))) {
BL::ParticleSystemModifier psmd((const PointerRNA)b_mod->ptr);
BL::ParticleSystem b_psys((const PointerRNA)psmd.particle_system().ptr);
b_psys.set_resolution(*scene, *b_ob, (render)? 2: 1);
}
}
}
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++) {
if(CData->curve_keynum[curve] <= 1 || CData->curve_length[curve] == 0.0f)
continue;
numverts += 2 + (CData->curve_keynum[curve] - 1)*2;
numtris += (CData->curve_keynum[curve] - 1)*2;
}
}
mesh->verts.reserve(mesh->verts.size() + numverts);
mesh->triangles.reserve(mesh->triangles.size() + numtris);
mesh->shader.reserve(mesh->shader.size() + numtris);
mesh->smooth.reserve(mesh->smooth.size() + 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++) {
if(CData->curve_keynum[curve] <= 1 || CData->curve_length[curve] == 0.0f)
continue;
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->verts.push_back(ickey_loc_shfl);
mesh->verts.push_back(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->verts.push_back(ickey_loc_shfl);
mesh->verts.push_back(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->reserve(mesh->verts.size(), mesh->triangles.size(), 0, 0);
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 */
}
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++) {
if(CData->curve_keynum[curve] <= 1 || CData->curve_length[curve] == 0.0f)
continue;
numverts += (CData->curve_keynum[curve] - 2)*2*resolution + resolution;
numtris += (CData->curve_keynum[curve] - 2)*resolution;
}
}
mesh->verts.reserve(mesh->verts.size() + numverts);
mesh->triangles.reserve(mesh->triangles.size() + numtris);
mesh->shader.reserve(mesh->shader.size() + numtris);
mesh->smooth.reserve(mesh->smooth.size() + 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++) {
if(CData->curve_keynum[curve] <= 1 || CData->curve_length[curve] == 0.0f)
continue;
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->verts.push_back(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->reserve(mesh->verts.size(), mesh->triangles.size(), 0, 0);
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 */
}
void ExportCurveSegments(Scene *scene, Mesh *mesh, ParticleCurveData *CData)
{
int num_keys = 0;
int num_curves = 0;
if(!(mesh->curves.empty() && mesh->curve_keys.empty()))
return;
Attribute *attr_intercept = NULL;
if(mesh->need_attribute(scene, ATTR_STD_CURVE_INTERCEPT))
attr_intercept = mesh->curve_attributes.add(ATTR_STD_CURVE_INTERCEPT);
/* 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++) {
if(CData->curve_keynum[curve] <= 1 || CData->curve_length[curve] == 0.0f)
continue;
num_keys += CData->curve_keynum[curve];
num_curves++;
}
}
if(num_curves > 0) {
VLOG(1) << "Exporting curve segments for mesh " << mesh->name;
}
mesh->curve_keys.reserve(mesh->curve_keys.size() + num_keys);
mesh->curves.reserve(mesh->curves.size() + num_curves);
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++) {
if(CData->curve_keynum[curve] <= 1 || CData->curve_length[curve] == 0.0f)
continue;
size_t num_curve_keys = 0;
for(int curvekey = CData->curve_firstkey[curve]; curvekey < CData->curve_firstkey[curve] + CData->curve_keynum[curve]; curvekey++) {
float3 ickey_loc = CData->curvekey_co[curvekey];
float time = CData->curvekey_time[curvekey]/CData->curve_length[curve];
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++;
}
mesh->add_curve(num_keys, num_curve_keys, CData->psys_shader[sys]);
num_keys += num_curve_keys;
num_curves++;
}
}
/* check allocation */
if((mesh->curve_keys.size() != num_keys) || (mesh->curves.size() != num_curves)) {
VLOG(1) << "Allocation failed, clearing data";
mesh->curve_keys.clear();
mesh->curves.clear();
mesh->curve_attributes.clear();
}
}
static void ExportCurveSegmentsMotion(Mesh *mesh, ParticleCurveData *CData, int time_index)
{
VLOG(1) << "Exporting curve motion segments for mesh " << mesh->name
<< ", time index " << time_index;
/* 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() + time_index*numkeys;
bool have_motion = false;
int i = 0;
for(int sys = 0; sys < CData->psys_firstcurve.size(); sys++) {
if(CData->psys_curvenum[sys] == 0)
continue;
for(int curve = CData->psys_firstcurve[sys]; curve < CData->psys_firstcurve[sys] + CData->psys_curvenum[sys]; curve++) {
if(CData->curve_keynum[curve] <= 1 || CData->curve_length[curve] == 0.0f)
continue;
for(int curvekey = CData->curve_firstkey[curve]; curvekey < CData->curve_firstkey[curve] + CData->curve_keynum[curve]; curvekey++) {
if(i < mesh->curve_keys.size()) {
float3 ickey_loc = CData->curvekey_co[curvekey];
float time = CData->curvekey_time[curvekey]/CData->curve_length[curve];
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;
mP[i] = float3_to_float4(ickey_loc);
mP[i].w = radius;
/* 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 */
if(len_squared(mP[i] - mesh->curve_keys[i]) > 1e-5f*1e-5f)
have_motion = true;
}
i++;
}
}
}
/* in case of new attribute, we verify if there really was any motion */
if(new_attribute) {
if(i != numkeys || !have_motion) {
/* no motion, remove attributes again */
VLOG(1) << "No motion, removing attribute";
mesh->curve_attributes.remove(ATTR_STD_MOTION_VERTEX_POSITION);
}
else if(time_index > 0) {
VLOG(1) << "Filling in new motion vertex position for time_index "
<< time_index;
/* 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 < time_index; step++) {
float4 *mP = attr_mP->data_float4() + step*numkeys;
for(int key = 0; key < numkeys; key++)
mP[key] = mesh->curve_keys[key];
}
}
}
}
void ExportCurveTriangleUV(ParticleCurveData *CData, int vert_offset, int resol, float3 *uvdata)
{
if(uvdata == NULL)
return;
float time = 0.0f;
float prevtime = 0.0f;
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++) {
if(CData->curve_keynum[curve] <= 1 || CData->curve_length[curve] == 0.0f)
continue;
for(int curvekey = CData->curve_firstkey[curve]; curvekey < CData->curve_firstkey[curve] + CData->curve_keynum[curve] - 1; curvekey++) {
time = CData->curvekey_time[curvekey]/CData->curve_length[curve];
for(int section = 0; section < resol; section++) {
uvdata[vertexindex] = CData->curve_uv[curve];
uvdata[vertexindex].z = prevtime;
vertexindex++;
uvdata[vertexindex] = CData->curve_uv[curve];
uvdata[vertexindex].z = time;
vertexindex++;
uvdata[vertexindex] = CData->curve_uv[curve];
uvdata[vertexindex].z = prevtime;
vertexindex++;
uvdata[vertexindex] = CData->curve_uv[curve];
uvdata[vertexindex].z = time;
vertexindex++;
uvdata[vertexindex] = CData->curve_uv[curve];
uvdata[vertexindex].z = prevtime;
vertexindex++;
uvdata[vertexindex] = CData->curve_uv[curve];
uvdata[vertexindex].z = time;
vertexindex++;
}
prevtime = time;
}
}
}
}
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++) {
if(CData->curve_keynum[curve] <= 1 || CData->curve_length[curve] == 0.0f)
continue;
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++) {
cdata[vertexindex] = color_float_to_byte(color_srgb_to_scene_linear(CData->curve_vcol[curve]));
vertexindex++;
cdata[vertexindex] = color_float_to_byte(color_srgb_to_scene_linear(CData->curve_vcol[curve]));
vertexindex++;
cdata[vertexindex] = color_float_to_byte(color_srgb_to_scene_linear(CData->curve_vcol[curve]));
vertexindex++;
cdata[vertexindex] = color_float_to_byte(color_srgb_to_scene_linear(CData->curve_vcol[curve]));
vertexindex++;
cdata[vertexindex] = color_float_to_byte(color_srgb_to_scene_linear(CData->curve_vcol[curve]));
vertexindex++;
cdata[vertexindex] = color_float_to_byte(color_srgb_to_scene_linear(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 time_index)
{
if(!motion) {
/* Clear stored curve data */
mesh->curve_keys.clear();
mesh->curves.clear();
mesh->curve_attributes.clear();
}
/* obtain general settings */
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;
}
int primitive = scene->curve_system_manager->primitive;
int triangle_method = scene->curve_system_manager->triangle_method;
int resolution = scene->curve_system_manager->resolution;
size_t vert_num = mesh->verts.size();
size_t tri_num = mesh->triangles.size();
int used_res = 1;
/* extract particle hair data - should be combined with connecting to mesh later*/
ParticleCurveData CData;
if(!preview)
set_resolution(&b_ob, &b_scene, true);
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, time_index);
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();
size_t i = 0;
foreach(Mesh::Curve& curve, mesh->curves) {
float3 co = float4_to_float3(mesh->curve_keys[curve.first_key]);
generated[i++] = co*size - loc;
}
}
}
}
/* create vertex color attributes */
if(!motion) {
BL::Mesh::tessface_vertex_colors_iterator l;
int vcol_num = 0;
for(b_mesh.tessface_vertex_colors.begin(l); l != b_mesh.tessface_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;
for(size_t curve = 0; curve < CData.curve_vcol.size(); curve++)
if(!(CData.curve_keynum[curve] <= 1 || CData.curve_length[curve] == 0.0f))
fdata[i++] = color_srgb_to_scene_linear(CData.curve_vcol[curve]);
}
}
}
}
/* create UV attributes */
if(!motion) {
BL::Mesh::tessface_uv_textures_iterator l;
int uv_num = 0;
for(b_mesh.tessface_uv_textures.begin(l); l != b_mesh.tessface_uv_textures.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, TypeDesc::TypePoint, ATTR_ELEMENT_CORNER);
float3 *uv = attr_uv->data_float3();
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, TypeDesc::TypePoint, ATTR_ELEMENT_CURVE);
float3 *uv = attr_uv->data_float3();
if(uv) {
size_t i = 0;
for(size_t curve = 0; curve < CData.curve_uv.size(); curve++)
if(!(CData.curve_keynum[curve] <= 1 || CData.curve_length[curve] == 0.0f))
uv[i++] = CData.curve_uv[curve];
}
}
}
}
}
if(!preview)
set_resolution(&b_ob, &b_scene, false);
mesh->compute_bounds();
}
CCL_NAMESPACE_END
View Git Blame Copy Permalink