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tornavis/intern/cycles/scene/mesh.cpp

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/* SPDX-FileCopyrightText: 2011-2022 Blender Foundation
*
* SPDX-License-Identifier: Apache-2.0 */
#include "bvh/build.h"
#include "bvh/bvh.h"
#include "device/device.h"
#include "scene/hair.h"
#include "scene/mesh.h"
#include "scene/object.h"
#include "scene/scene.h"
#include "scene/shader_graph.h"
#include "subd/patch_table.h"
#include "subd/split.h"
#include "util/foreach.h"
#include "util/log.h"
#include "util/progress.h"
#include "util/set.h"
CCL_NAMESPACE_BEGIN
/* Triangle */
void Mesh::Triangle::bounds_grow(const float3 *verts, BoundBox &bounds) const
{
bounds.grow(verts[v[0]]);
bounds.grow(verts[v[1]]);
bounds.grow(verts[v[2]]);
}
void Mesh::Triangle::motion_verts(const float3 *verts,
const float3 *vert_steps,
size_t num_verts,
size_t num_steps,
float time,
float3 r_verts[3]) const
{
/* Figure out which steps we need to fetch and their interpolation factor. */
const size_t max_step = num_steps - 1;
const size_t step = min((size_t)(time * max_step), max_step - 1);
const float t = time * max_step - step;
/* Fetch vertex coordinates. */
float3 curr_verts[3];
float3 next_verts[3];
verts_for_step(verts, vert_steps, num_verts, num_steps, step, curr_verts);
verts_for_step(verts, vert_steps, num_verts, num_steps, step + 1, next_verts);
/* Interpolate between steps. */
r_verts[0] = (1.0f - t) * curr_verts[0] + t * next_verts[0];
r_verts[1] = (1.0f - t) * curr_verts[1] + t * next_verts[1];
r_verts[2] = (1.0f - t) * curr_verts[2] + t * next_verts[2];
}
void Mesh::Triangle::verts_for_step(const float3 *verts,
const float3 *vert_steps,
size_t num_verts,
size_t num_steps,
size_t step,
float3 r_verts[3]) const
{
const size_t center_step = ((num_steps - 1) / 2);
if (step == center_step) {
/* Center step: regular vertex location. */
r_verts[0] = verts[v[0]];
r_verts[1] = verts[v[1]];
r_verts[2] = verts[v[2]];
}
else {
/* Center step not stored in the attribute array. */
if (step > center_step) {
step--;
}
size_t offset = step * num_verts;
r_verts[0] = vert_steps[offset + v[0]];
r_verts[1] = vert_steps[offset + v[1]];
r_verts[2] = vert_steps[offset + v[2]];
}
}
float3 Mesh::Triangle::compute_normal(const float3 *verts) const
{
const float3 &v0 = verts[v[0]];
const float3 &v1 = verts[v[1]];
const float3 &v2 = verts[v[2]];
const float3 norm = cross(v1 - v0, v2 - v0);
const float normlen = len(norm);
if (normlen == 0.0f) {
return make_float3(1.0f, 0.0f, 0.0f);
}
return norm / normlen;
}
bool Mesh::Triangle::valid(const float3 *verts) const
{
return isfinite_safe(verts[v[0]]) && isfinite_safe(verts[v[1]]) && isfinite_safe(verts[v[2]]);
}
/* SubdFace */
float3 Mesh::SubdFace::normal(const Mesh *mesh) const
{
float3 v0 = mesh->verts[mesh->subd_face_corners[start_corner + 0]];
float3 v1 = mesh->verts[mesh->subd_face_corners[start_corner + 1]];
float3 v2 = mesh->verts[mesh->subd_face_corners[start_corner + 2]];
return safe_normalize(cross(v1 - v0, v2 - v0));
}
/* Mesh */
NODE_DEFINE(Mesh)
{
NodeType *type = NodeType::add("mesh", create, NodeType::NONE, Geometry::get_node_base_type());
SOCKET_INT_ARRAY(triangles, "Triangles", array<int>());
SOCKET_POINT_ARRAY(verts, "Vertices", array<float3>());
SOCKET_INT_ARRAY(shader, "Shader", array<int>());
SOCKET_BOOLEAN_ARRAY(smooth, "Smooth", array<bool>());
SOCKET_INT_ARRAY(triangle_patch, "Triangle Patch", array<int>());
SOCKET_POINT2_ARRAY(vert_patch_uv, "Patch UVs", array<float2>());
static NodeEnum subdivision_type_enum;
subdivision_type_enum.insert("none", SUBDIVISION_NONE);
subdivision_type_enum.insert("linear", SUBDIVISION_LINEAR);
subdivision_type_enum.insert("catmull_clark", SUBDIVISION_CATMULL_CLARK);
SOCKET_ENUM(subdivision_type, "Subdivision Type", subdivision_type_enum, SUBDIVISION_NONE);
SOCKET_INT_ARRAY(subd_vert_creases, "Subdivision Vertex Crease", array<int>());
SOCKET_FLOAT_ARRAY(
subd_vert_creases_weight, "Subdivision Vertex Crease Weights", array<float>());
SOCKET_INT_ARRAY(subd_creases_edge, "Subdivision Crease Edges", array<int>());
SOCKET_FLOAT_ARRAY(subd_creases_weight, "Subdivision Crease Weights", array<float>());
SOCKET_INT_ARRAY(subd_face_corners, "Subdivision Face Corners", array<int>());
SOCKET_INT_ARRAY(subd_start_corner, "Subdivision Face Start Corner", array<int>());
SOCKET_INT_ARRAY(subd_num_corners, "Subdivision Face Corner Count", array<int>());
SOCKET_INT_ARRAY(subd_shader, "Subdivision Face Shader", array<int>());
SOCKET_BOOLEAN_ARRAY(subd_smooth, "Subdivision Face Smooth", array<bool>());
SOCKET_INT_ARRAY(subd_ptex_offset, "Subdivision Face PTex Offset", array<int>());
SOCKET_INT(num_ngons, "NGons Number", 0);
/* Subdivisions parameters */
SOCKET_FLOAT(subd_dicing_rate, "Subdivision Dicing Rate", 1.0f)
SOCKET_INT(subd_max_level, "Max Subdivision Level", 1);
SOCKET_TRANSFORM(subd_objecttoworld, "Subdivision Object Transform", transform_identity());
return type;
}
SubdParams *Mesh::get_subd_params()
{
if (subdivision_type == SubdivisionType::SUBDIVISION_NONE) {
return nullptr;
}
if (!subd_params) {
subd_params = new SubdParams(this);
}
subd_params->dicing_rate = subd_dicing_rate;
subd_params->max_level = subd_max_level;
subd_params->objecttoworld = subd_objecttoworld;
return subd_params;
}
bool Mesh::need_tesselation()
{
return get_subd_params() && (verts_is_modified() || subd_dicing_rate_is_modified() ||
subd_objecttoworld_is_modified() || subd_max_level_is_modified());
}
Mesh::Mesh(const NodeType *node_type, Type geom_type_)
: Geometry(node_type, geom_type_), subd_attributes(this, ATTR_PRIM_SUBD)
{
vert_offset = 0;
patch_offset = 0;
face_offset = 0;
corner_offset = 0;
num_subd_verts = 0;
num_subd_faces = 0;
num_ngons = 0;
subdivision_type = SUBDIVISION_NONE;
subd_params = NULL;
patch_table = NULL;
}
Mesh::Mesh() : Mesh(get_node_type(), Geometry::MESH) {}
Mesh::~Mesh()
{
delete patch_table;
delete subd_params;
}
void Mesh::resize_mesh(int numverts, int numtris)
{
verts.resize(numverts);
triangles.resize(numtris * 3);
shader.resize(numtris);
smooth.resize(numtris);
if (get_num_subd_faces()) {
triangle_patch.resize(numtris);
vert_patch_uv.resize(numverts);
}
attributes.resize();
}
void Mesh::reserve_mesh(int numverts, int numtris)
{
/* reserve space to add verts and triangles later */
verts.reserve(numverts);
triangles.reserve(numtris * 3);
shader.reserve(numtris);
smooth.reserve(numtris);
if (get_num_subd_faces()) {
triangle_patch.reserve(numtris);
vert_patch_uv.reserve(numverts);
}
attributes.resize(true);
}
void Mesh::resize_subd_faces(int numfaces, int num_ngons_, int numcorners)
{
subd_start_corner.resize(numfaces);
subd_num_corners.resize(numfaces);
subd_shader.resize(numfaces);
subd_smooth.resize(numfaces);
subd_ptex_offset.resize(numfaces);
subd_face_corners.resize(numcorners);
num_ngons = num_ngons_;
num_subd_faces = numfaces;
subd_attributes.resize();
}
void Mesh::reserve_subd_faces(int numfaces, int num_ngons_, int numcorners)
{
subd_start_corner.reserve(numfaces);
subd_num_corners.reserve(numfaces);
subd_shader.reserve(numfaces);
subd_smooth.reserve(numfaces);
subd_ptex_offset.reserve(numfaces);
subd_face_corners.reserve(numcorners);
num_ngons = num_ngons_;
num_subd_faces = numfaces;
subd_attributes.resize(true);
}
void Mesh::reserve_subd_creases(size_t num_creases)
{
subd_creases_edge.reserve(num_creases * 2);
subd_creases_weight.reserve(num_creases);
}
void Mesh::clear_non_sockets()
{
Geometry::clear(true);
num_subd_verts = 0;
num_subd_faces = 0;
vert_to_stitching_key_map.clear();
vert_stitching_map.clear();
delete patch_table;
patch_table = NULL;
}
void Mesh::clear(bool preserve_shaders, bool preserve_voxel_data)
{
Geometry::clear(preserve_shaders);
/* clear all verts and triangles */
verts.clear();
triangles.clear();
shader.clear();
smooth.clear();
triangle_patch.clear();
vert_patch_uv.clear();
subd_start_corner.clear();
subd_num_corners.clear();
subd_shader.clear();
subd_smooth.clear();
subd_ptex_offset.clear();
subd_face_corners.clear();
subd_creases_edge.clear();
subd_creases_weight.clear();
subd_attributes.clear();
attributes.clear(preserve_voxel_data);
subdivision_type = SubdivisionType::SUBDIVISION_NONE;
clear_non_sockets();
}
void Mesh::clear(bool preserve_shaders)
{
clear(preserve_shaders, false);
}
void Mesh::add_vertex(float3 P)
{
verts.push_back_reserved(P);
tag_verts_modified();
if (get_num_subd_faces()) {
vert_patch_uv.push_back_reserved(zero_float2());
tag_vert_patch_uv_modified();
}
}
void Mesh::add_vertex_slow(float3 P)
{
verts.push_back_slow(P);
tag_verts_modified();
if (get_num_subd_faces()) {
vert_patch_uv.push_back_slow(zero_float2());
tag_vert_patch_uv_modified();
}
}
void Mesh::add_triangle(int v0, int v1, int v2, int shader_, bool smooth_)
{
triangles.push_back_reserved(v0);
triangles.push_back_reserved(v1);
triangles.push_back_reserved(v2);
shader.push_back_reserved(shader_);
smooth.push_back_reserved(smooth_);
tag_triangles_modified();
tag_shader_modified();
tag_smooth_modified();
if (get_num_subd_faces()) {
triangle_patch.push_back_reserved(-1);
tag_triangle_patch_modified();
}
}
void Mesh::add_subd_face(const int *corners, int num_corners, int shader_, bool smooth_)
{
int start_corner = subd_face_corners.size();
for (int i = 0; i < num_corners; i++) {
subd_face_corners.push_back_reserved(corners[i]);
}
int ptex_offset = 0;
// cannot use get_num_subd_faces here as it holds the total number of subd_faces, but we do not
// have the total amount of data yet
if (subd_shader.size()) {
SubdFace s = get_subd_face(subd_shader.size() - 1);
ptex_offset = s.ptex_offset + s.num_ptex_faces();
}
subd_start_corner.push_back_reserved(start_corner);
subd_num_corners.push_back_reserved(num_corners);
subd_shader.push_back_reserved(shader_);
subd_smooth.push_back_reserved(smooth_);
subd_ptex_offset.push_back_reserved(ptex_offset);
tag_subd_face_corners_modified();
tag_subd_start_corner_modified();
tag_subd_num_corners_modified();
tag_subd_shader_modified();
tag_subd_smooth_modified();
tag_subd_ptex_offset_modified();
}
Mesh::SubdFace Mesh::get_subd_face(size_t index) const
{
Mesh::SubdFace s;
s.shader = subd_shader[index];
s.num_corners = subd_num_corners[index];
s.smooth = subd_smooth[index];
s.ptex_offset = subd_ptex_offset[index];
s.start_corner = subd_start_corner[index];
return s;
}
void Mesh::add_edge_crease(int v0, int v1, float weight)
{
subd_creases_edge.push_back_slow(v0);
subd_creases_edge.push_back_slow(v1);
subd_creases_weight.push_back_slow(weight);
tag_subd_creases_edge_modified();
tag_subd_creases_edge_modified();
tag_subd_creases_weight_modified();
}
void Mesh::add_vertex_crease(int v, float weight)
{
subd_vert_creases.push_back_slow(v);
subd_vert_creases_weight.push_back_slow(weight);
tag_subd_vert_creases_modified();
tag_subd_vert_creases_weight_modified();
}
void Mesh::copy_center_to_motion_step(const int motion_step)
{
Attribute *attr_mP = attributes.find(ATTR_STD_MOTION_VERTEX_POSITION);
if (attr_mP) {
Attribute *attr_mN = attributes.find(ATTR_STD_MOTION_VERTEX_NORMAL);
Attribute *attr_N = attributes.find(ATTR_STD_VERTEX_NORMAL);
float3 *P = &verts[0];
float3 *N = (attr_N) ? attr_N->data_float3() : NULL;
size_t numverts = verts.size();
memcpy(attr_mP->data_float3() + motion_step * numverts, P, sizeof(float3) * numverts);
if (attr_mN) {
memcpy(attr_mN->data_float3() + motion_step * numverts, N, sizeof(float3) * numverts);
}
}
}
void Mesh::get_uv_tiles(ustring map, unordered_set<int> &tiles)
{
Attribute *attr, *subd_attr;
if (map.empty()) {
attr = attributes.find(ATTR_STD_UV);
subd_attr = subd_attributes.find(ATTR_STD_UV);
}
else {
attr = attributes.find(map);
subd_attr = subd_attributes.find(map);
}
if (attr) {
attr->get_uv_tiles(this, ATTR_PRIM_GEOMETRY, tiles);
}
if (subd_attr) {
subd_attr->get_uv_tiles(this, ATTR_PRIM_SUBD, tiles);
}
}
void Mesh::compute_bounds()
{
BoundBox bnds = BoundBox::empty;
size_t verts_size = verts.size();
if (verts_size > 0) {
for (size_t i = 0; i < verts_size; i++) {
bnds.grow(verts[i]);
}
Attribute *attr = attributes.find(ATTR_STD_MOTION_VERTEX_POSITION);
if (use_motion_blur && attr) {
size_t steps_size = verts.size() * (motion_steps - 1);
float3 *vert_steps = attr->data_float3();
for (size_t i = 0; i < steps_size; i++) {
bnds.grow(vert_steps[i]);
}
}
if (!bnds.valid()) {
bnds = BoundBox::empty;
/* skip nan or inf coordinates */
for (size_t i = 0; i < verts_size; i++) {
bnds.grow_safe(verts[i]);
}
if (use_motion_blur && attr) {
size_t steps_size = verts.size() * (motion_steps - 1);
float3 *vert_steps = attr->data_float3();
for (size_t i = 0; i < steps_size; i++) {
bnds.grow_safe(vert_steps[i]);
}
}
}
}
if (!bnds.valid()) {
/* empty mesh */
bnds.grow(zero_float3());
}
bounds = bnds;
}
void Mesh::apply_transform(const Transform &tfm, const bool apply_to_motion)
{
transform_normal = transform_transposed_inverse(tfm);
/* apply to mesh vertices */
for (size_t i = 0; i < verts.size(); i++) {
verts[i] = transform_point(&tfm, verts[i]);
}
tag_verts_modified();
if (apply_to_motion) {
Attribute *attr = attributes.find(ATTR_STD_MOTION_VERTEX_POSITION);
if (attr) {
size_t steps_size = verts.size() * (motion_steps - 1);
float3 *vert_steps = attr->data_float3();
for (size_t i = 0; i < steps_size; i++) {
vert_steps[i] = transform_point(&tfm, vert_steps[i]);
}
}
Attribute *attr_N = attributes.find(ATTR_STD_MOTION_VERTEX_NORMAL);
if (attr_N) {
Transform ntfm = transform_normal;
size_t steps_size = verts.size() * (motion_steps - 1);
float3 *normal_steps = attr_N->data_float3();
for (size_t i = 0; i < steps_size; i++) {
normal_steps[i] = normalize(transform_direction(&ntfm, normal_steps[i]));
}
}
}
}
void Mesh::add_face_normals()
{
/* don't compute if already there */
if (attributes.find(ATTR_STD_FACE_NORMAL)) {
return;
}
/* get attributes */
Attribute *attr_fN = attributes.add(ATTR_STD_FACE_NORMAL);
float3 *fN = attr_fN->data_float3();
/* compute face normals */
size_t triangles_size = num_triangles();
if (triangles_size) {
float3 *verts_ptr = verts.data();
for (size_t i = 0; i < triangles_size; i++) {
fN[i] = get_triangle(i).compute_normal(verts_ptr);
}
}
/* expected to be in local space */
if (transform_applied) {
Transform ntfm = transform_inverse(transform_normal);
for (size_t i = 0; i < triangles_size; i++) {
fN[i] = normalize(transform_direction(&ntfm, fN[i]));
}
}
}
void Mesh::add_vertex_normals()
{
bool flip = transform_negative_scaled;
size_t verts_size = verts.size();
size_t triangles_size = num_triangles();
/* static vertex normals */
if (!attributes.find(ATTR_STD_VERTEX_NORMAL) && triangles_size) {
/* get attributes */
Attribute *attr_fN = attributes.find(ATTR_STD_FACE_NORMAL);
Attribute *attr_vN = attributes.add(ATTR_STD_VERTEX_NORMAL);
float3 *fN = attr_fN->data_float3();
float3 *vN = attr_vN->data_float3();
/* compute vertex normals */
memset(vN, 0, verts.size() * sizeof(float3));
for (size_t i = 0; i < triangles_size; i++) {
for (size_t j = 0; j < 3; j++) {
vN[get_triangle(i).v[j]] += fN[i];
}
}
if (flip) {
for (size_t i = 0; i < verts_size; i++) {
vN[i] = -normalize(vN[i]);
}
}
else {
for (size_t i = 0; i < verts_size; i++) {
vN[i] = normalize(vN[i]);
}
}
}
/* motion vertex normals */
Attribute *attr_mP = attributes.find(ATTR_STD_MOTION_VERTEX_POSITION);
Attribute *attr_mN = attributes.find(ATTR_STD_MOTION_VERTEX_NORMAL);
if (has_motion_blur() && attr_mP && !attr_mN && triangles_size) {
/* create attribute */
attr_mN = attributes.add(ATTR_STD_MOTION_VERTEX_NORMAL);
for (int step = 0; step < motion_steps - 1; step++) {
float3 *mP = attr_mP->data_float3() + step * verts.size();
float3 *mN = attr_mN->data_float3() + step * verts.size();
/* compute */
memset(mN, 0, verts.size() * sizeof(float3));
for (size_t i = 0; i < triangles_size; i++) {
Triangle tri = get_triangle(i);
float3 fN = tri.compute_normal(mP);
for (size_t j = 0; j < 3; j++) {
mN[tri.v[j]] += fN;
}
}
if (flip) {
for (size_t i = 0; i < verts_size; i++) {
mN[i] = -normalize(mN[i]);
}
}
else {
for (size_t i = 0; i < verts_size; i++) {
mN[i] = normalize(mN[i]);
}
}
}
}
/* subd vertex normals */
if (!subd_attributes.find(ATTR_STD_VERTEX_NORMAL) && get_num_subd_faces()) {
/* get attributes */
Attribute *attr_vN = subd_attributes.add(ATTR_STD_VERTEX_NORMAL);
float3 *vN = attr_vN->data_float3();
/* compute vertex normals */
memset(vN, 0, verts.size() * sizeof(float3));
for (size_t i = 0; i < get_num_subd_faces(); i++) {
SubdFace face = get_subd_face(i);
float3 fN = face.normal(this);
for (size_t j = 0; j < face.num_corners; j++) {
size_t corner = subd_face_corners[face.start_corner + j];
vN[corner] += fN;
}
}
if (flip) {
for (size_t i = 0; i < verts_size; i++) {
vN[i] = -normalize(vN[i]);
}
}
else {
for (size_t i = 0; i < verts_size; i++) {
vN[i] = normalize(vN[i]);
}
}
}
}
void Mesh::add_undisplaced()
{
AttributeSet &attrs = (subdivision_type == SUBDIVISION_NONE) ? attributes : subd_attributes;
/* don't compute if already there */
if (attrs.find(ATTR_STD_POSITION_UNDISPLACED)) {
return;
}
/* get attribute */
Attribute *attr = attrs.add(ATTR_STD_POSITION_UNDISPLACED);
attr->flags |= ATTR_SUBDIVIDED;
float3 *data = attr->data_float3();
/* copy verts */
size_t size = attr->buffer_size(this, ATTR_PRIM_GEOMETRY);
/* Center points for ngons aren't stored in Mesh::verts but are included in size since they will
* be calculated later, we subtract them from size here so we don't have an overflow while
* copying.
*/
size -= num_ngons * attr->data_sizeof();
if (size) {
memcpy(data, verts.data(), size);
}
}
void Mesh::pack_shaders(Scene *scene, uint *tri_shader)
{
uint shader_id = 0;
uint last_shader = -1;
bool last_smooth = false;
size_t triangles_size = num_triangles();
const int *shader_ptr = shader.data();
const bool *smooth_ptr = smooth.data();
for (size_t i = 0; i < triangles_size; i++) {
const int new_shader = shader_ptr ? shader_ptr[i] : INT_MAX;
const bool new_smooth = smooth_ptr ? smooth_ptr[i] : false;
if (new_shader != last_shader || last_smooth != new_smooth) {
last_shader = new_shader;
last_smooth = new_smooth;
Shader *shader = (last_shader < used_shaders.size()) ?
static_cast<Shader *>(used_shaders[last_shader]) :
scene->default_surface;
shader_id = scene->shader_manager->get_shader_id(shader, last_smooth);
}
tri_shader[i] = shader_id;
}
}
void Mesh::pack_normals(packed_float3 *vnormal)
{
Attribute *attr_vN = attributes.find(ATTR_STD_VERTEX_NORMAL);
if (attr_vN == NULL) {
/* Happens on objects with just hair. */
return;
}
bool do_transform = transform_applied;
Transform ntfm = transform_normal;
float3 *vN = attr_vN->data_float3();
size_t verts_size = verts.size();
if (do_transform) {
for (size_t i = 0; i < verts_size; i++) {
vnormal[i] = safe_normalize(transform_direction(&ntfm, vN[i]));
}
}
else {
for (size_t i = 0; i < verts_size; i++) {
vnormal[i] = vN[i];
}
}
}
void Mesh::pack_verts(packed_float3 *tri_verts,
packed_uint3 *tri_vindex,
uint *tri_patch,
float2 *tri_patch_uv)
{
size_t verts_size = verts.size();
size_t triangles_size = num_triangles();
const int *p_tris = triangles.data();
int off = 0;
if (verts_size && get_num_subd_faces()) {
float2 *vert_patch_uv_ptr = vert_patch_uv.data();
for (size_t i = 0; i < verts_size; i++) {
tri_verts[i] = verts[i];
tri_patch_uv[i] = vert_patch_uv_ptr[i];
}
for (size_t i = 0; i < triangles_size; i++) {
tri_vindex[i] = make_packed_uint3(p_tris[off + 0] + vert_offset,
p_tris[off + 1] + vert_offset,
p_tris[off + 2] + vert_offset);
tri_patch[i] = triangle_patch[i] * 8 + patch_offset;
off += 3;
}
}
else {
for (size_t i = 0; i < verts_size; i++) {
tri_verts[i] = verts[i];
}
for (size_t i = 0; i < triangles_size; i++) {
tri_vindex[i] = make_packed_uint3(p_tris[off + 0] + vert_offset,
p_tris[off + 1] + vert_offset,
p_tris[off + 2] + vert_offset);
tri_patch[i] = -1;
off += 3;
}
}
}
void Mesh::pack_patches(uint *patch_data)
{
size_t num_faces = get_num_subd_faces();
int ngons = 0;
for (size_t f = 0; f < num_faces; f++) {
SubdFace face = get_subd_face(f);
if (face.is_quad()) {
int c[4];
memcpy(c, &subd_face_corners[face.start_corner], sizeof(int) * 4);
*(patch_data++) = c[0] + vert_offset;
*(patch_data++) = c[1] + vert_offset;
*(patch_data++) = c[2] + vert_offset;
*(patch_data++) = c[3] + vert_offset;
*(patch_data++) = f + face_offset;
*(patch_data++) = face.num_corners;
*(patch_data++) = face.start_corner + corner_offset;
*(patch_data++) = 0;
}
else {
for (int i = 0; i < face.num_corners; i++) {
int c[4];
c[0] = subd_face_corners[face.start_corner + mod(i + 0, face.num_corners)];
c[1] = subd_face_corners[face.start_corner + mod(i + 1, face.num_corners)];
c[2] = verts.size() - num_subd_verts + ngons;
c[3] = subd_face_corners[face.start_corner + mod(i - 1, face.num_corners)];
*(patch_data++) = c[0] + vert_offset;
*(patch_data++) = c[1] + vert_offset;
*(patch_data++) = c[2] + vert_offset;
*(patch_data++) = c[3] + vert_offset;
*(patch_data++) = f + face_offset;
*(patch_data++) = face.num_corners | (i << 16);
*(patch_data++) = face.start_corner + corner_offset;
*(patch_data++) = subd_face_corners.size() + ngons + corner_offset;
}
ngons++;
}
}
}
PrimitiveType Mesh::primitive_type() const
{
return has_motion_blur() ? PRIMITIVE_MOTION_TRIANGLE : PRIMITIVE_TRIANGLE;
}
CCL_NAMESPACE_END
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