Cycles render engine, initial commit. This is the engine itself, blender modifications and build instructions will follow later.
Cycles uses code from some great open source projects, many thanks them: * BVH building and traversal code from NVidia's "Understanding the Efficiency of Ray Traversal on GPUs": http://code.google.com/p/understanding-the-efficiency-of-ray-traversal-on-gpus/ * Open Shading Language for a large part of the shading system: http://code.google.com/p/openshadinglanguage/ * Blender for procedural textures and a few other nodes. * Approximate Catmull Clark subdivision from NVidia Mesh tools: http://code.google.com/p/nvidia-mesh-tools/ * Sobol direction vectors from: http://web.maths.unsw.edu.au/~fkuo/sobol/ * Film response functions from: http://www.cs.columbia.edu/CAVE/software/softlib/dorf.php
This commit is contained in:
Ton Roosendaal
213
intern/cycles/render/object.cpp
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213
intern/cycles/render/object.cpp
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/*
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* Copyright 2011, Blender Foundation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "device.h"
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#include "mesh.h"
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#include "object.h"
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#include "scene.h"
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#include "util_foreach.h"
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#include "util_progress.h"
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CCL_NAMESPACE_BEGIN
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/* Object */
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Object::Object()
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{
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name = "";
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mesh = NULL;
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tfm = transform_identity();
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}
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Object::~Object()
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{
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}
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void Object::compute_bounds()
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{
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bounds = mesh->bounds.transformed(&tfm);
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}
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void Object::apply_transform()
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{
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if(!mesh || tfm == transform_identity())
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return;
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for(size_t i = 0; i < mesh->verts.size(); i++)
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mesh->verts[i] = transform(&tfm, mesh->verts[i]);
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Attribute *attr_fN = mesh->attributes.find(Attribute::STD_FACE_NORMAL);
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Attribute *attr_vN = mesh->attributes.find(Attribute::STD_VERTEX_NORMAL);
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Transform ntfm = transform_transpose(transform_inverse(tfm));
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if(attr_fN) {
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float3 *fN = attr_fN->data_float3();
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for(size_t i = 0; i < mesh->triangles.size(); i++)
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fN[i] = transform_direction(&ntfm, fN[i]);
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}
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if(attr_vN) {
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float3 *vN = attr_vN->data_float3();
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for(size_t i = 0; i < mesh->verts.size(); i++)
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vN[i] = transform_direction(&ntfm, vN[i]);
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}
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if(bounds.valid()) {
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mesh->compute_bounds();
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compute_bounds();
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}
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tfm = transform_identity();
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}
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void Object::tag_update(Scene *scene)
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{
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if(mesh && mesh->transform_applied)
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mesh->need_update = true;
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scene->mesh_manager->need_update = true;
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scene->object_manager->need_update = true;
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}
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/* Object Manager */
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ObjectManager::ObjectManager()
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{
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need_update = true;
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}
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ObjectManager::~ObjectManager()
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{
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}
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void ObjectManager::device_update_transforms(Device *device, DeviceScene *dscene, Scene *scene, Progress& progress)
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{
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float4 *objects = dscene->objects.resize(OBJECT_SIZE*scene->objects.size());
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int i = 0;
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foreach(Object *ob, scene->objects) {
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Mesh *mesh = ob->mesh;
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/* compute transformations */
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Transform tfm = ob->tfm;
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Transform itfm = transform_inverse(tfm);
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Transform ntfm = transform_transpose(itfm);
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/* compute surface area */
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/* todo: correct for displacement, and move to a better place */
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float surfacearea = 0.0f;
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foreach(Mesh::Triangle& t, mesh->triangles) {
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float3 p1 = transform(&tfm, mesh->verts[t.v[0]]);
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float3 p2 = transform(&tfm, mesh->verts[t.v[1]]);
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float3 p3 = transform(&tfm, mesh->verts[t.v[2]]);
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surfacearea += triangle_area(p1, p2, p3);
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}
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/* pack in texture */
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int offset = i*OBJECT_SIZE;
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memcpy(&objects[offset], &tfm, sizeof(float4)*4);
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memcpy(&objects[offset+4], &itfm, sizeof(float4)*4);
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memcpy(&objects[offset+8], &ntfm, sizeof(float4)*4);
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objects[offset+12] = make_float4(surfacearea, 0.0f, 0.0f, 0.0f);
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i++;
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if(progress.get_cancel()) return;
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}
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device->tex_alloc("__objects", dscene->objects);
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}
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void ObjectManager::device_update(Device *device, DeviceScene *dscene, Scene *scene, Progress& progress)
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{
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if(!need_update)
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return;
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device_free(device, dscene);
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if(scene->objects.size() == 0)
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return;
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/* set object transform matrices, before applying static transforms */
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progress.set_status("Updating Objects", "Copying Transformations to device");
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device_update_transforms(device, dscene, scene, progress);
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if(progress.get_cancel()) return;
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/* prepare for static BVH building */
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/* todo: do before to support getting object level coords? */
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if(scene->params.bvh_type == SceneParams::BVH_STATIC) {
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progress.set_status("Updating Objects", "Applying Static Transformations");
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apply_static_transforms(scene, progress);
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}
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if(progress.get_cancel()) return;
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need_update = false;
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}
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void ObjectManager::device_free(Device *device, DeviceScene *dscene)
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{
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device->tex_free(dscene->objects);
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dscene->objects.clear();
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}
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void ObjectManager::apply_static_transforms(Scene *scene, Progress& progress)
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{
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/* todo: normals and displacement should be done before applying transform! */
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/* todo: create objects/meshes in right order! */
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/* counter mesh users */
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map<Mesh*, int> mesh_users;
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foreach(Object *object, scene->objects) {
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map<Mesh*, int>::iterator it = mesh_users.find(object->mesh);
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if(it == mesh_users.end())
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mesh_users[object->mesh] = 1;
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else
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it->second++;
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}
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if(progress.get_cancel()) return;
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/* apply transforms for objects with single user meshes */
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foreach(Object *object, scene->objects) {
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if(mesh_users[object->mesh] == 1) {
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object->apply_transform();
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object->mesh->transform_applied = true;
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if(progress.get_cancel()) return;
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}
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}
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}
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void ObjectManager::tag_update(Scene *scene)
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{
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need_update = true;
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scene->mesh_manager->need_update = true;
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}
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CCL_NAMESPACE_END
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