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Diffstat (limited to 'intern/cycles/blender/blender_mesh.cpp')
| -rw-r--r-- | intern/cycles/blender/blender_mesh.cpp | 321 |
1 files changed, 321 insertions, 0 deletions
diff --git a/intern/cycles/blender/blender_mesh.cpp b/intern/cycles/blender/blender_mesh.cpp new file mode 100644 index 00000000000..56e8561d64b --- /dev/null +++ b/intern/cycles/blender/blender_mesh.cpp @@ -0,0 +1,321 @@ +/* + * Copyright 2011, Blender Foundation. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#include "mesh.h" +#include "object.h" +#include "scene.h" + +#include "blender_sync.h" +#include "blender_util.h" + +#include "subd_mesh.h" +#include "subd_patch.h" +#include "subd_split.h" + +#include "util_foreach.h" + +CCL_NAMESPACE_BEGIN + +/* Find/Add */ + +static bool mesh_need_attribute(Scene *scene, Mesh *mesh, Attribute::Standard std) +{ + if(std == Attribute::STD_NONE) + return false; + + foreach(uint shader, mesh->used_shaders) + if(scene->shaders[shader]->attributes.find(std)) + return true; + + return false; +} + +static bool mesh_need_attribute(Scene *scene, Mesh *mesh, ustring name) +{ + if(name == ustring()) + return false; + + foreach(uint shader, mesh->used_shaders) + if(scene->shaders[shader]->attributes.find(name)) + return true; + + return false; +} + +static void create_mesh(Scene *scene, Mesh *mesh, BL::Mesh b_mesh, const vector<uint>& used_shaders) +{ + /* create vertices */ + BL::Mesh::vertices_iterator v; + + for(b_mesh.vertices.begin(v); v != b_mesh.vertices.end(); ++v) + mesh->verts.push_back(get_float3(v->co())); + + /* create vertex normals */ + Attribute *attr_N = mesh->attributes.add(Attribute::STD_VERTEX_NORMAL); + float3 *N = attr_N->data_float3(); + + for(b_mesh.vertices.begin(v); v != b_mesh.vertices.end(); ++v, ++N) + *N= get_float3(v->normal()); + + /* create faces */ + BL::Mesh::faces_iterator f; + vector<int> nverts; + + for(b_mesh.faces.begin(f); f != b_mesh.faces.end(); ++f) { + int4 vi = get_int4(f->vertices_raw()); + int n= (vi[3] == 0)? 3: 4; + int shader = used_shaders[f->material_index()]; + bool smooth = f->use_smooth(); + + mesh->add_triangle(vi[0], vi[1], vi[2], shader, smooth); + + if(n == 4) + mesh->add_triangle(vi[0], vi[2], vi[3], shader, smooth); + + nverts.push_back(n); + } + + /* create generated coordinates. todo: we should actually get the orco + coordinates from modifiers, for now we use texspace loc/size which + is available in the api. */ + if(mesh_need_attribute(scene, mesh, Attribute::STD_GENERATED)) { + Attribute *attr = mesh->attributes.add(Attribute::STD_GENERATED); + float3 loc = get_float3(b_mesh.texspace_location()); + float3 size = get_float3(b_mesh.texspace_size()); + + if(size.x != 0.0f) size.x = 0.5f/size.x; + if(size.y != 0.0f) size.y = 0.5f/size.y; + if(size.z != 0.0f) size.z = 0.5f/size.z; + + loc = loc*size - make_float3(0.5f, 0.5f, 0.5f); + + float3 *fdata = attr->data_float3(); + BL::Mesh::vertices_iterator v; + size_t i = 0; + + for(b_mesh.vertices.begin(v); v != b_mesh.vertices.end(); ++v) + fdata[i++] = get_float3(v->co())*size - loc; + } + + /* create vertex color attributes */ + { + BL::Mesh::vertex_colors_iterator l; + + for(b_mesh.vertex_colors.begin(l); l != b_mesh.vertex_colors.end(); ++l) { + if(!mesh_need_attribute(scene, mesh, ustring(l->name().c_str()))) + continue; + + Attribute *attr = mesh->attributes.add( + ustring(l->name().c_str()), TypeDesc::TypeColor, Attribute::CORNER); + + BL::MeshColorLayer::data_iterator c; + float3 *fdata = attr->data_float3(); + size_t i = 0; + + for(l->data.begin(c); c != l->data.end(); ++c, ++i) { + fdata[0] = color_srgb_to_scene_linear(get_float3(c->color1())); + fdata[1] = color_srgb_to_scene_linear(get_float3(c->color2())); + fdata[2] = color_srgb_to_scene_linear(get_float3(c->color3())); + + if(nverts[i] == 4) { + fdata[3] = fdata[0]; + fdata[4] = fdata[2]; + fdata[5] = color_srgb_to_scene_linear(get_float3(c->color4())); + fdata += 6; + } + else + fdata += 3; + } + } + } + + /* create uv layer attributes */ + { + BL::Mesh::uv_textures_iterator l; + + for(b_mesh.uv_textures.begin(l); l != b_mesh.uv_textures.end(); ++l) { + Attribute::Standard std = (l->active_render())? Attribute::STD_UV: Attribute::STD_NONE; + ustring name = ustring(l->name().c_str()); + + if(!(mesh_need_attribute(scene, mesh, name) || mesh_need_attribute(scene, mesh, std))) + continue; + + Attribute *attr; + + if(l->active_render()) + attr = mesh->attributes.add(std, name); + else + attr = mesh->attributes.add(name, TypeDesc::TypePoint, Attribute::CORNER); + + BL::MeshTextureFaceLayer::data_iterator t; + float3 *fdata = attr->data_float3(); + size_t i = 0; + + for(l->data.begin(t); t != l->data.end(); ++t, ++i) { + fdata[0] = get_float3(t->uv1()); + fdata[1] = get_float3(t->uv2()); + fdata[2] = get_float3(t->uv3()); + fdata += 3; + + if(nverts[i] == 4) { + fdata[0] = get_float3(t->uv1()); + fdata[1] = get_float3(t->uv3()); + fdata[2] = get_float3(t->uv4()); + fdata += 3; + } + } + } + } +} + +static void create_subd_mesh(Mesh *mesh, BL::Mesh b_mesh, PointerRNA *cmesh, const vector<uint>& used_shaders) +{ + /* create subd mesh */ + SubdMesh sdmesh; + + /* create vertices */ + BL::Mesh::vertices_iterator v; + + for(b_mesh.vertices.begin(v); v != b_mesh.vertices.end(); ++v) + sdmesh.add_vert(get_float3(v->co())); + + /* create faces */ + BL::Mesh::faces_iterator f; + + for(b_mesh.faces.begin(f); f != b_mesh.faces.end(); ++f) { + int4 vi = get_int4(f->vertices_raw()); + int n= (vi[3] == 0)? 3: 4; + //int shader = used_shaders[f->material_index()]; + + if(n == 4) + sdmesh.add_face(vi[0], vi[1], vi[2], vi[3]); + /*else + sdmesh.add_face(vi[0], vi[1], vi[2]);*/ + } + + /* finalize subd mesh */ + sdmesh.link_boundary(); + + /* subdivide */ + DiagSplit dsplit; + dsplit.camera = NULL; + dsplit.dicing_rate = RNA_float_get(cmesh, "dicing_rate"); + + sdmesh.tesselate(&dsplit, false, mesh, used_shaders[0], true); +} + +/* Sync */ + +Mesh *BlenderSync::sync_mesh(BL::Object b_ob, bool object_updated) +{ + /* test if we can instance or if the object is modified */ + BL::ID b_ob_data = b_ob.data(); + BL::ID key = (object_is_modified(b_ob))? b_ob: b_ob_data; + + /* find shader indices */ + vector<uint> used_shaders; + + BL::Object::material_slots_iterator slot; + for(b_ob.material_slots.begin(slot); slot != b_ob.material_slots.end(); ++slot) { + if(render_layer.material_override) + find_shader(render_layer.material_override, used_shaders); + else + find_shader(slot->material(), used_shaders); + } + + if(used_shaders.size() == 0) + used_shaders.push_back(scene->default_surface); + + /* test if we need to sync */ + Mesh *mesh; + + if(!mesh_map.sync(&mesh, key)) { + /* if transform was applied to mesh, need full update */ + if(object_updated && mesh->transform_applied); + /* test if shaders changed, these can be object level so mesh + does not get tagged for recalc */ + else if(mesh->used_shaders != used_shaders); + else { + /* even if not tagged for recalc, we may need to sync anyway + * because the shader needs different mesh attributes */ + bool attribute_recalc = false; + + foreach(uint shader, mesh->used_shaders) + if(scene->shaders[shader]->need_update_attributes) + attribute_recalc = true; + + if(!attribute_recalc) + return mesh; + } + } + + /* ensure we only sync instanced meshes once */ + if(mesh_synced.find(mesh) != mesh_synced.end()) + return mesh; + + mesh_synced.insert(mesh); + + /* create derived mesh */ + BL::Mesh b_mesh = object_to_mesh(b_ob, b_scene, true, !preview); + PointerRNA cmesh = RNA_pointer_get(&b_ob_data.ptr, "cycles"); + + vector<Mesh::Triangle> oldtriangle = mesh->triangles; + + mesh->clear(); + mesh->used_shaders = used_shaders; + mesh->name = ustring(b_ob_data.name().c_str()); + + if(b_mesh) { + if(cmesh.data && RNA_boolean_get(&cmesh, "use_subdivision")) + create_subd_mesh(mesh, b_mesh, &cmesh, used_shaders); + else + create_mesh(scene, mesh, b_mesh, used_shaders); + + /* free derived mesh */ + object_remove_mesh(b_data, b_mesh); + } + + /* displacement method */ + if(cmesh.data) { + int method = RNA_enum_get(&cmesh, "displacement_method"); + + if(method == 0) + mesh->displacement_method = Mesh::DISPLACE_BUMP; + else if(method == 1) + mesh->displacement_method = Mesh::DISPLACE_TRUE; + else + mesh->displacement_method = Mesh::DISPLACE_BOTH; + } + + /* tag update */ + bool rebuild = false; + + if(oldtriangle.size() != mesh->triangles.size()) + rebuild = true; + else if(oldtriangle.size()) { + if(memcmp(&oldtriangle[0], &mesh->triangles[0], sizeof(Mesh::Triangle)*oldtriangle.size()) != 0) + rebuild = true; + } + + mesh->tag_update(scene, rebuild); + + return mesh; +} + +CCL_NAMESPACE_END + |