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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 <stdio.h>
#include <algorithm>
#include <iterator>
#include <sstream>
#include "graph/node_xml.h"
#include "render/background.h"
#include "render/camera.h"
#include "render/film.h"
#include "render/graph.h"
#include "render/integrator.h"
#include "render/light.h"
#include "render/mesh.h"
#include "render/nodes.h"
#include "render/object.h"
#include "render/osl.h"
#include "render/scene.h"
#include "render/shader.h"
#include "subd/subd_patch.h"
#include "subd/subd_split.h"
#include "util/util_foreach.h"
#include "util/util_path.h"
#include "util/util_projection.h"
#include "util/util_transform.h"
#include "util/util_xml.h"
#include "app/cycles_xml.h"
CCL_NAMESPACE_BEGIN
/* XML reading state */
struct XMLReadState : public XMLReader {
Scene *scene; /* scene pointer */
Transform tfm; /* current transform state */
bool smooth; /* smooth normal state */
Shader *shader; /* current shader */
string base; /* base path to current file*/
float dicing_rate; /* current dicing rate */
XMLReadState() : scene(NULL), smooth(false), shader(NULL), dicing_rate(1.0f)
{
tfm = transform_identity();
}
};
/* Attribute Reading */
static bool xml_read_int(int *value, xml_node node, const char *name)
{
xml_attribute attr = node.attribute(name);
if (attr) {
*value = atoi(attr.value());
return true;
}
return false;
}
static bool xml_read_int_array(vector<int> &value, xml_node node, const char *name)
{
xml_attribute attr = node.attribute(name);
if (attr) {
vector<string> tokens;
string_split(tokens, attr.value());
foreach (const string &token, tokens)
value.push_back(atoi(token.c_str()));
return true;
}
return false;
}
static bool xml_read_float(float *value, xml_node node, const char *name)
{
xml_attribute attr = node.attribute(name);
if (attr) {
*value = (float)atof(attr.value());
return true;
}
return false;
}
static bool xml_read_float_array(vector<float> &value, xml_node node, const char *name)
{
xml_attribute attr = node.attribute(name);
if (attr) {
vector<string> tokens;
string_split(tokens, attr.value());
foreach (const string &token, tokens)
value.push_back((float)atof(token.c_str()));
return true;
}
return false;
}
static bool xml_read_float3(float3 *value, xml_node node, const char *name)
{
vector<float> array;
if (xml_read_float_array(array, node, name) && array.size() == 3) {
*value = make_float3(array[0], array[1], array[2]);
return true;
}
return false;
}
static bool xml_read_float3_array(vector<float3> &value, xml_node node, const char *name)
{
vector<float> array;
if (xml_read_float_array(array, node, name)) {
for (size_t i = 0; i < array.size(); i += 3)
value.push_back(make_float3(array[i + 0], array[i + 1], array[i + 2]));
return true;
}
return false;
}
static bool xml_read_float4(float4 *value, xml_node node, const char *name)
{
vector<float> array;
if (xml_read_float_array(array, node, name) && array.size() == 4) {
*value = make_float4(array[0], array[1], array[2], array[3]);
return true;
}
return false;
}
static bool xml_read_string(string *str, xml_node node, const char *name)
{
xml_attribute attr = node.attribute(name);
if (attr) {
*str = attr.value();
return true;
}
return false;
}
static bool xml_equal_string(xml_node node, const char *name, const char *value)
{
xml_attribute attr = node.attribute(name);
if (attr)
return string_iequals(attr.value(), value);
return false;
}
/* Camera */
static void xml_read_camera(XMLReadState &state, xml_node node)
{
Camera *cam = state.scene->camera;
xml_read_int(&cam->width, node, "width");
xml_read_int(&cam->height, node, "height");
cam->full_width = cam->width;
cam->full_height = cam->height;
xml_read_node(state, cam, node);
cam->matrix = state.tfm;
cam->need_update = true;
cam->update(state.scene);
}
/* Shader */
static void xml_read_shader_graph(XMLReadState &state, Shader *shader, xml_node graph_node)
{
xml_read_node(state, shader, graph_node);
ShaderGraph *graph = new ShaderGraph();
/* local state, shader nodes can't link to nodes outside the shader graph */
XMLReader graph_reader;
graph_reader.node_map[ustring("output")] = graph->output();
for (xml_node node = graph_node.first_child(); node; node = node.next_sibling()) {
ustring node_name(node.name());
if (node_name == "connect") {
/* connect nodes */
vector<string> from_tokens, to_tokens;
string_split(from_tokens, node.attribute("from").value());
string_split(to_tokens, node.attribute("to").value());
if (from_tokens.size() == 2 && to_tokens.size() == 2) {
ustring from_node_name(from_tokens[0]);
ustring from_socket_name(from_tokens[1]);
ustring to_node_name(to_tokens[0]);
ustring to_socket_name(to_tokens[1]);
/* find nodes and sockets */
ShaderOutput *output = NULL;
ShaderInput *input = NULL;
if (graph_reader.node_map.find(from_node_name) != graph_reader.node_map.end()) {
ShaderNode *fromnode = (ShaderNode *)graph_reader.node_map[from_node_name];
foreach (ShaderOutput *out, fromnode->outputs)
if (string_iequals(out->socket_type.name.string(), from_socket_name.string()))
output = out;
if (!output)
fprintf(stderr,
"Unknown output socket name \"%s\" on \"%s\".\n",
from_node_name.c_str(),
from_socket_name.c_str());
}
else
fprintf(stderr, "Unknown shader node name \"%s\".\n", from_node_name.c_str());
if (graph_reader.node_map.find(to_node_name) != graph_reader.node_map.end()) {
ShaderNode *tonode = (ShaderNode *)graph_reader.node_map[to_node_name];
foreach (ShaderInput *in, tonode->inputs)
if (string_iequals(in->socket_type.name.string(), to_socket_name.string()))
input = in;
if (!input)
fprintf(stderr,
"Unknown input socket name \"%s\" on \"%s\".\n",
to_socket_name.c_str(),
to_node_name.c_str());
}
else
fprintf(stderr, "Unknown shader node name \"%s\".\n", to_node_name.c_str());
/* connect */
if (output && input)
graph->connect(output, input);
}
else
fprintf(stderr, "Invalid from or to value for connect node.\n");
continue;
}
ShaderNode *snode = NULL;
#ifdef WITH_OSL
if (node_name == "osl_shader") {
ShaderManager *manager = state.scene->shader_manager;
if (manager->use_osl()) {
std::string filepath;
if (xml_read_string(&filepath, node, "src")) {
if (path_is_relative(filepath)) {
filepath = path_join(state.base, filepath);
}
snode = OSLShaderManager::osl_node(graph, manager, filepath, "");
if (!snode) {
fprintf(stderr, "Failed to create OSL node from \"%s\".\n", filepath.c_str());
continue;
}
}
else {
fprintf(stderr, "OSL node missing \"src\" attribute.\n");
continue;
}
}
else {
fprintf(stderr, "OSL node without using --shadingsys osl.\n");
continue;
}
}
else
#endif
{
/* exception for name collision */
if (node_name == "background")
node_name = "background_shader";
const NodeType *node_type = NodeType::find(node_name);
if (!node_type) {
fprintf(stderr, "Unknown shader node \"%s\".\n", node.name());
continue;
}
else if (node_type->type != NodeType::SHADER) {
fprintf(stderr, "Node type \"%s\" is not a shader node.\n", node_type->name.c_str());
continue;
}
else if (node_type->create == NULL) {
fprintf(stderr, "Can't create abstract node type \"%s\".\n", node_type->name.c_str());
continue;
}
snode = (ShaderNode *)node_type->create(node_type);
}
xml_read_node(graph_reader, snode, node);
if (node_name == "image_texture") {
ImageTextureNode *img = (ImageTextureNode *)snode;
img->filename = path_join(state.base, img->filename.string());
}
else if (node_name == "environment_texture") {
EnvironmentTextureNode *env = (EnvironmentTextureNode *)snode;
env->filename = path_join(state.base, env->filename.string());
}
if (snode) {
/* add to graph */
graph->add(snode);
}
}
shader->set_graph(graph);
shader->tag_update(state.scene);
}
static void xml_read_shader(XMLReadState &state, xml_node node)
{
Shader *shader = new Shader();
xml_read_shader_graph(state, shader, node);
state.scene->shaders.push_back(shader);
}
/* Background */
static void xml_read_background(XMLReadState &state, xml_node node)
{
/* Background Settings */
xml_read_node(state, state.scene->background, node);
/* Background Shader */
Shader *shader = state.scene->default_background;
xml_read_shader_graph(state, shader, node);
}
/* Mesh */
static Mesh *xml_add_mesh(Scene *scene, const Transform &tfm)
{
/* create mesh */
Mesh *mesh = new Mesh();
scene->geometry.push_back(mesh);
/* create object*/
Object *object = new Object();
object->geometry = mesh;
object->tfm = tfm;
scene->objects.push_back(object);
return mesh;
}
static void xml_read_mesh(const XMLReadState &state, xml_node node)
{
/* add mesh */
Mesh *mesh = xml_add_mesh(state.scene, state.tfm);
mesh->used_shaders.push_back(state.shader);
/* read state */
int shader = 0;
bool smooth = state.smooth;
/* read vertices and polygons */
vector<float3> P;
vector<float> UV;
vector<int> verts, nverts;
xml_read_float3_array(P, node, "P");
xml_read_int_array(verts, node, "verts");
xml_read_int_array(nverts, node, "nverts");
if (xml_equal_string(node, "subdivision", "catmull-clark")) {
mesh->subdivision_type = Mesh::SUBDIVISION_CATMULL_CLARK;
}
else if (xml_equal_string(node, "subdivision", "linear")) {
mesh->subdivision_type = Mesh::SUBDIVISION_LINEAR;
}
if (mesh->subdivision_type == Mesh::SUBDIVISION_NONE) {
/* create vertices */
mesh->verts = P;
size_t num_triangles = 0;
for (size_t i = 0; i < nverts.size(); i++)
num_triangles += nverts[i] - 2;
mesh->reserve_mesh(mesh->verts.size(), num_triangles);
/* create triangles */
int index_offset = 0;
for (size_t i = 0; i < nverts.size(); i++) {
for (int j = 0; j < nverts[i] - 2; j++) {
int v0 = verts[index_offset];
int v1 = verts[index_offset + j + 1];
int v2 = verts[index_offset + j + 2];
assert(v0 < (int)P.size());
assert(v1 < (int)P.size());
assert(v2 < (int)P.size());
mesh->add_triangle(v0, v1, v2, shader, smooth);
}
index_offset += nverts[i];
}
if (xml_read_float_array(UV, node, "UV")) {
ustring name = ustring("UVMap");
Attribute *attr = mesh->attributes.add(ATTR_STD_UV, name);
float2 *fdata = attr->data_float2();
/* loop over the triangles */
index_offset = 0;
for (size_t i = 0; i < nverts.size(); i++) {
for (int j = 0; j < nverts[i] - 2; j++) {
int v0 = index_offset;
int v1 = index_offset + j + 1;
int v2 = index_offset + j + 2;
assert(v0 * 2 + 1 < (int)UV.size());
assert(v1 * 2 + 1 < (int)UV.size());
assert(v2 * 2 + 1 < (int)UV.size());
fdata[0] = make_float2(UV[v0 * 2], UV[v0 * 2 + 1]);
fdata[1] = make_float2(UV[v1 * 2], UV[v1 * 2 + 1]);
fdata[2] = make_float2(UV[v2 * 2], UV[v2 * 2 + 1]);
fdata += 3;
}
index_offset += nverts[i];
}
}
}
else {
/* create vertices */
mesh->verts = P;
size_t num_ngons = 0;
size_t num_corners = 0;
for (size_t i = 0; i < nverts.size(); i++) {
num_ngons += (nverts[i] == 4) ? 0 : 1;
num_corners += nverts[i];
}
mesh->reserve_subd_faces(nverts.size(), num_ngons, num_corners);
/* create subd_faces */
int index_offset = 0;
for (size_t i = 0; i < nverts.size(); i++) {
mesh->add_subd_face(&verts[index_offset], nverts[i], shader, smooth);
index_offset += nverts[i];
}
/* uv map */
if (xml_read_float_array(UV, node, "UV")) {
ustring name = ustring("UVMap");
Attribute *attr = mesh->subd_attributes.add(ATTR_STD_UV, name);
float3 *fdata = attr->data_float3();
#if 0
if (subdivide_uvs) {
attr->flags |= ATTR_SUBDIVIDED;
}
#endif
index_offset = 0;
for (size_t i = 0; i < nverts.size(); i++) {
for (int j = 0; j < nverts[i]; j++) {
*(fdata++) = make_float3(UV[index_offset++]);
}
}
}
/* setup subd params */
if (!mesh->subd_params) {
mesh->subd_params = new SubdParams(mesh);
}
SubdParams &sdparams = *mesh->subd_params;
sdparams.dicing_rate = state.dicing_rate;
xml_read_float(&sdparams.dicing_rate, node, "dicing_rate");
sdparams.dicing_rate = std::max(0.1f, sdparams.dicing_rate);
sdparams.objecttoworld = state.tfm;
}
/* we don't yet support arbitrary attributes, for now add vertex
* coordinates as generated coordinates if requested */
if (mesh->need_attribute(state.scene, ATTR_STD_GENERATED)) {
Attribute *attr = mesh->attributes.add(ATTR_STD_GENERATED);
memcpy(attr->data_float3(), mesh->verts.data(), sizeof(float3) * mesh->verts.size());
}
}
/* Light */
static void xml_read_light(XMLReadState &state, xml_node node)
{
Light *light = new Light();
light->shader = state.shader;
xml_read_node(state, light, node);
state.scene->lights.push_back(light);
}
/* Transform */
static void xml_read_transform(xml_node node, Transform &tfm)
{
if (node.attribute("matrix")) {
vector<float> matrix;
if (xml_read_float_array(matrix, node, "matrix") && matrix.size() == 16) {
ProjectionTransform projection = *(ProjectionTransform *)&matrix[0];
tfm = tfm * projection_to_transform(projection_transpose(projection));
}
}
if (node.attribute("translate")) {
float3 translate = make_float3(0.0f, 0.0f, 0.0f);
xml_read_float3(&translate, node, "translate");
tfm = tfm * transform_translate(translate);
}
if (node.attribute("rotate")) {
float4 rotate = make_float4(0.0f, 0.0f, 0.0f, 0.0f);
xml_read_float4(&rotate, node, "rotate");
tfm = tfm * transform_rotate(DEG2RADF(rotate.x), make_float3(rotate.y, rotate.z, rotate.w));
}
if (node.attribute("scale")) {
float3 scale = make_float3(0.0f, 0.0f, 0.0f);
xml_read_float3(&scale, node, "scale");
tfm = tfm * transform_scale(scale);
}
}
/* State */
static void xml_read_state(XMLReadState &state, xml_node node)
{
/* read shader */
string shadername;
if (xml_read_string(&shadername, node, "shader")) {
bool found = false;
foreach (Shader *shader, state.scene->shaders) {
if (shader->name == shadername) {
state.shader = shader;
found = true;
break;
}
}
if (!found)
fprintf(stderr, "Unknown shader \"%s\".\n", shadername.c_str());
}
xml_read_float(&state.dicing_rate, node, "dicing_rate");
/* read smooth/flat */
if (xml_equal_string(node, "interpolation", "smooth"))
state.smooth = true;
else if (xml_equal_string(node, "interpolation", "flat"))
state.smooth = false;
}
/* Scene */
static void xml_read_include(XMLReadState &state, const string &src);
static void xml_read_scene(XMLReadState &state, xml_node scene_node)
{
for (xml_node node = scene_node.first_child(); node; node = node.next_sibling()) {
if (string_iequals(node.name(), "film")) {
xml_read_node(state, state.scene->film, node);
}
else if (string_iequals(node.name(), "integrator")) {
xml_read_node(state, state.scene->integrator, node);
}
else if (string_iequals(node.name(), "camera")) {
xml_read_camera(state, node);
}
else if (string_iequals(node.name(), "shader")) {
xml_read_shader(state, node);
}
else if (string_iequals(node.name(), "background")) {
xml_read_background(state, node);
}
else if (string_iequals(node.name(), "mesh")) {
xml_read_mesh(state, node);
}
else if (string_iequals(node.name(), "light")) {
xml_read_light(state, node);
}
else if (string_iequals(node.name(), "transform")) {
XMLReadState substate = state;
xml_read_transform(node, substate.tfm);
xml_read_scene(substate, node);
}
else if (string_iequals(node.name(), "state")) {
XMLReadState substate = state;
xml_read_state(substate, node);
xml_read_scene(substate, node);
}
else if (string_iequals(node.name(), "include")) {
string src;
if (xml_read_string(&src, node, "src"))
xml_read_include(state, src);
}
else
fprintf(stderr, "Unknown node \"%s\".\n", node.name());
}
}
/* Include */
static void xml_read_include(XMLReadState &state, const string &src)
{
/* open XML document */
xml_document doc;
xml_parse_result parse_result;
string path = path_join(state.base, src);
parse_result = doc.load_file(path.c_str());
if (parse_result) {
XMLReadState substate = state;
substate.base = path_dirname(path);
xml_node cycles = doc.child("cycles");
xml_read_scene(substate, cycles);
}
else {
fprintf(stderr, "%s read error: %s\n", src.c_str(), parse_result.description());
exit(EXIT_FAILURE);
}
}
/* File */
void xml_read_file(Scene *scene, const char *filepath)
{
XMLReadState state;
state.scene = scene;
state.tfm = transform_identity();
state.shader = scene->default_surface;
state.smooth = false;
state.dicing_rate = 1.0f;
state.base = path_dirname(filepath);
xml_read_include(state, path_filename(filepath));
scene->params.bvh_type = SceneParams::BVH_STATIC;
}
CCL_NAMESPACE_END
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