forked from bartvdbraak/blender
699 lines
17 KiB
C++
699 lines
17 KiB
C++
/*
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* Copyright 2011-2013 Blender Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdio.h>
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#include <sstream>
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#include <algorithm>
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#include <iterator>
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#include "graph/node_xml.h"
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#include "render/background.h"
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#include "render/camera.h"
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#include "render/film.h"
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#include "render/graph.h"
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#include "render/integrator.h"
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#include "render/light.h"
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#include "render/mesh.h"
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#include "render/nodes.h"
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#include "render/object.h"
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#include "render/osl.h"
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#include "render/shader.h"
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#include "render/scene.h"
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#include "subd/subd_patch.h"
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#include "subd/subd_split.h"
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#include "util/util_debug.h"
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#include "util/util_foreach.h"
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#include "util/util_path.h"
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#include "util/util_transform.h"
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#include "util/util_xml.h"
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#include "app/cycles_xml.h"
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CCL_NAMESPACE_BEGIN
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/* XML reading state */
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struct XMLReadState : public XMLReader {
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Scene *scene; /* scene pointer */
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Transform tfm; /* current transform state */
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bool smooth; /* smooth normal state */
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Shader *shader; /* current shader */
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string base; /* base path to current file*/
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float dicing_rate; /* current dicing rate */
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XMLReadState()
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: scene(NULL),
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smooth(false),
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shader(NULL),
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dicing_rate(1.0f)
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{
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tfm = transform_identity();
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}
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};
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/* Attribute Reading */
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static bool xml_read_int(int *value, pugi::xml_node node, const char *name)
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{
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pugi::xml_attribute attr = node.attribute(name);
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if(attr) {
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*value = atoi(attr.value());
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return true;
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}
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return false;
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}
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static bool xml_read_int_array(vector<int>& value, pugi::xml_node node, const char *name)
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{
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pugi::xml_attribute attr = node.attribute(name);
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if(attr) {
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vector<string> tokens;
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string_split(tokens, attr.value());
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foreach(const string& token, tokens)
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value.push_back(atoi(token.c_str()));
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return true;
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}
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return false;
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}
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static bool xml_read_float(float *value, pugi::xml_node node, const char *name)
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{
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pugi::xml_attribute attr = node.attribute(name);
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if(attr) {
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*value = (float)atof(attr.value());
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return true;
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}
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return false;
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}
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static bool xml_read_float_array(vector<float>& value, pugi::xml_node node, const char *name)
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{
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pugi::xml_attribute attr = node.attribute(name);
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if(attr) {
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vector<string> tokens;
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string_split(tokens, attr.value());
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foreach(const string& token, tokens)
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value.push_back((float)atof(token.c_str()));
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return true;
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}
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return false;
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}
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static bool xml_read_float3(float3 *value, pugi::xml_node node, const char *name)
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{
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vector<float> array;
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if(xml_read_float_array(array, node, name) && array.size() == 3) {
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*value = make_float3(array[0], array[1], array[2]);
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return true;
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}
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return false;
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}
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static bool xml_read_float3_array(vector<float3>& value, pugi::xml_node node, const char *name)
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{
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vector<float> array;
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if(xml_read_float_array(array, node, name)) {
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for(size_t i = 0; i < array.size(); i += 3)
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value.push_back(make_float3(array[i+0], array[i+1], array[i+2]));
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return true;
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}
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return false;
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}
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static bool xml_read_float4(float4 *value, pugi::xml_node node, const char *name)
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{
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vector<float> array;
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if(xml_read_float_array(array, node, name) && array.size() == 4) {
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*value = make_float4(array[0], array[1], array[2], array[3]);
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return true;
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}
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return false;
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}
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static bool xml_read_string(string *str, pugi::xml_node node, const char *name)
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{
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pugi::xml_attribute attr = node.attribute(name);
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if(attr) {
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*str = attr.value();
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return true;
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}
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return false;
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}
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static bool xml_equal_string(pugi::xml_node node, const char *name, const char *value)
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{
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pugi::xml_attribute attr = node.attribute(name);
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if(attr)
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return string_iequals(attr.value(), value);
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return false;
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}
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/* Camera */
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static void xml_read_camera(XMLReadState& state, pugi::xml_node node)
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{
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Camera *cam = state.scene->camera;
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xml_read_int(&cam->width, node, "width");
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xml_read_int(&cam->height, node, "height");
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cam->full_width = cam->width;
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cam->full_height = cam->height;
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xml_read_node(state, cam, node);
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cam->matrix = state.tfm;
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cam->need_update = true;
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cam->update();
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}
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/* Shader */
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static void xml_read_shader_graph(XMLReadState& state, Shader *shader, pugi::xml_node graph_node)
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{
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xml_read_node(state, shader, graph_node);
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ShaderGraph *graph = new ShaderGraph();
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/* local state, shader nodes can't link to nodes outside the shader graph */
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XMLReader graph_reader;
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graph_reader.node_map[ustring("output")] = graph->output();
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for(pugi::xml_node node = graph_node.first_child(); node; node = node.next_sibling()) {
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ustring node_name(node.name());
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if(node_name == "connect") {
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/* connect nodes */
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vector<string> from_tokens, to_tokens;
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string_split(from_tokens, node.attribute("from").value());
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string_split(to_tokens, node.attribute("to").value());
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if(from_tokens.size() == 2 && to_tokens.size() == 2) {
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ustring from_node_name(from_tokens[0]);
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ustring from_socket_name(from_tokens[1]);
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ustring to_node_name(to_tokens[0]);
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ustring to_socket_name(to_tokens[1]);
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/* find nodes and sockets */
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ShaderOutput *output = NULL;
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ShaderInput *input = NULL;
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if(graph_reader.node_map.find(from_node_name) != graph_reader.node_map.end()) {
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ShaderNode *fromnode = (ShaderNode*)graph_reader.node_map[from_node_name];
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foreach(ShaderOutput *out, fromnode->outputs)
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if(string_iequals(out->socket_type.name.string(), from_socket_name.string()))
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output = out;
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if(!output)
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fprintf(stderr, "Unknown output socket name \"%s\" on \"%s\".\n", from_node_name.c_str(), from_socket_name.c_str());
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}
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else
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fprintf(stderr, "Unknown shader node name \"%s\".\n", from_node_name.c_str());
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if(graph_reader.node_map.find(to_node_name) != graph_reader.node_map.end()) {
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ShaderNode *tonode = (ShaderNode*)graph_reader.node_map[to_node_name];
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foreach(ShaderInput *in, tonode->inputs)
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if(string_iequals(in->socket_type.name.string(), to_socket_name.string()))
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input = in;
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if(!input)
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fprintf(stderr, "Unknown input socket name \"%s\" on \"%s\".\n", to_socket_name.c_str(), to_node_name.c_str());
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}
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else
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fprintf(stderr, "Unknown shader node name \"%s\".\n", to_node_name.c_str());
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/* connect */
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if(output && input)
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graph->connect(output, input);
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}
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else
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fprintf(stderr, "Invalid from or to value for connect node.\n");
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continue;
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}
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ShaderNode *snode = NULL;
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#ifdef WITH_OSL
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if(node_name == "osl_shader") {
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ShaderManager *manager = state.scene->shader_manager;
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if(manager->use_osl()) {
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std::string filepath;
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if(xml_read_string(&filepath, node, "src")) {
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if(path_is_relative(filepath)) {
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filepath = path_join(state.base, filepath);
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}
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snode = ((OSLShaderManager*)manager)->osl_node(filepath);
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if(!snode) {
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fprintf(stderr, "Failed to create OSL node from \"%s\".\n", filepath.c_str());
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continue;
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}
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}
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else {
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fprintf(stderr, "OSL node missing \"src\" attribute.\n");
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continue;
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}
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}
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else {
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fprintf(stderr, "OSL node without using --shadingsys osl.\n");
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continue;
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}
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}
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else
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#endif
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{
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/* exception for name collision */
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if(node_name == "background")
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node_name = "background_shader";
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const NodeType *node_type = NodeType::find(node_name);
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if(!node_type) {
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fprintf(stderr, "Unknown shader node \"%s\".\n", node.name());
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continue;
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}
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else if(node_type->type != NodeType::SHADER) {
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fprintf(stderr, "Node type \"%s\" is not a shader node.\n", node_type->name.c_str());
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continue;
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}
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snode = (ShaderNode*) node_type->create(node_type);
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}
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xml_read_node(graph_reader, snode, node);
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if(node_name == "image_texture") {
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ImageTextureNode *img = (ImageTextureNode*) snode;
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img->filename = path_join(state.base, img->filename.string());
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}
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else if(node_name == "environment_texture") {
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EnvironmentTextureNode *env = (EnvironmentTextureNode*) snode;
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env->filename = path_join(state.base, env->filename.string());
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}
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if(snode) {
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/* add to graph */
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graph->add(snode);
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}
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}
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shader->set_graph(graph);
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shader->tag_update(state.scene);
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}
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static void xml_read_shader(XMLReadState& state, pugi::xml_node node)
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{
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Shader *shader = new Shader();
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xml_read_shader_graph(state, shader, node);
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state.scene->shaders.push_back(shader);
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}
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/* Background */
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static void xml_read_background(XMLReadState& state, pugi::xml_node node)
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{
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/* Background Settings */
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xml_read_node(state, state.scene->background, node);
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/* Background Shader */
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Shader *shader = state.scene->default_background;
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xml_read_shader_graph(state, shader, node);
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}
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/* Mesh */
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static Mesh *xml_add_mesh(Scene *scene, const Transform& tfm)
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{
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/* create mesh */
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Mesh *mesh = new Mesh();
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scene->meshes.push_back(mesh);
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/* create object*/
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Object *object = new Object();
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object->mesh = mesh;
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object->tfm = tfm;
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scene->objects.push_back(object);
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return mesh;
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}
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static void xml_read_mesh(const XMLReadState& state, pugi::xml_node node)
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{
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/* add mesh */
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Mesh *mesh = xml_add_mesh(state.scene, state.tfm);
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mesh->used_shaders.push_back(state.shader);
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/* read state */
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int shader = 0;
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bool smooth = state.smooth;
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/* read vertices and polygons */
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vector<float3> P;
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vector<float> UV;
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vector<int> verts, nverts;
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xml_read_float3_array(P, node, "P");
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xml_read_int_array(verts, node, "verts");
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xml_read_int_array(nverts, node, "nverts");
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if(xml_equal_string(node, "subdivision", "catmull-clark")) {
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mesh->subdivision_type = Mesh::SUBDIVISION_CATMULL_CLARK;
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}
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else if(xml_equal_string(node, "subdivision", "linear")) {
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mesh->subdivision_type = Mesh::SUBDIVISION_LINEAR;
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}
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if(mesh->subdivision_type == Mesh::SUBDIVISION_NONE) {
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/* create vertices */
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mesh->verts = P;
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size_t num_triangles = 0;
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for(size_t i = 0; i < nverts.size(); i++)
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num_triangles += nverts[i]-2;
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mesh->reserve_mesh(mesh->verts.size(), num_triangles);
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/* create triangles */
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int index_offset = 0;
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for(size_t i = 0; i < nverts.size(); i++) {
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for(int j = 0; j < nverts[i]-2; j++) {
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int v0 = verts[index_offset];
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int v1 = verts[index_offset + j + 1];
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int v2 = verts[index_offset + j + 2];
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assert(v0 < (int)P.size());
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assert(v1 < (int)P.size());
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assert(v2 < (int)P.size());
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mesh->add_triangle(v0, v1, v2, shader, smooth);
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}
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index_offset += nverts[i];
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}
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if(xml_read_float_array(UV, node, "UV")) {
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ustring name = ustring("UVMap");
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Attribute *attr = mesh->attributes.add(ATTR_STD_UV, name);
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float3 *fdata = attr->data_float3();
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/* loop over the triangles */
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index_offset = 0;
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for(size_t i = 0; i < nverts.size(); i++) {
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for(int j = 0; j < nverts[i]-2; j++) {
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int v0 = index_offset;
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int v1 = index_offset + j + 1;
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int v2 = index_offset + j + 2;
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assert(v0*2+1 < (int)UV.size());
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assert(v1*2+1 < (int)UV.size());
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assert(v2*2+1 < (int)UV.size());
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fdata[0] = make_float3(UV[v0*2], UV[v0*2+1], 0.0);
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fdata[1] = make_float3(UV[v1*2], UV[v1*2+1], 0.0);
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fdata[2] = make_float3(UV[v2*2], UV[v2*2+1], 0.0);
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fdata += 3;
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}
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index_offset += nverts[i];
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}
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}
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}
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else {
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/* create vertices */
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mesh->verts = P;
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size_t num_ngons = 0;
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size_t num_corners = 0;
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for(size_t i = 0; i < nverts.size(); i++) {
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num_ngons += (nverts[i] == 4) ? 0 : 1;
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num_corners += nverts[i];
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}
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mesh->reserve_subd_faces(nverts.size(), num_ngons, num_corners);
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/* create subd_faces */
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int index_offset = 0;
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for(size_t i = 0; i < nverts.size(); i++) {
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mesh->add_subd_face(&verts[index_offset], nverts[i], shader, smooth);
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index_offset += nverts[i];
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}
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/* uv map */
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if(xml_read_float_array(UV, node, "UV")) {
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ustring name = ustring("UVMap");
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Attribute *attr = mesh->subd_attributes.add(ATTR_STD_UV, name);
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float3 *fdata = attr->data_float3();
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#if 0
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if(subdivide_uvs) {
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attr->flags |= ATTR_SUBDIVIDED;
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}
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#endif
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index_offset = 0;
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for(size_t i = 0; i < nverts.size(); i++) {
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for(int j = 0; j < nverts[i]; j++) {
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*(fdata++) = make_float3(UV[index_offset++]);
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}
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}
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}
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/* setup subd params */
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if(!mesh->subd_params) {
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mesh->subd_params = new SubdParams(mesh);
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}
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SubdParams& sdparams = *mesh->subd_params;
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sdparams.dicing_rate = state.dicing_rate;
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xml_read_float(&sdparams.dicing_rate, node, "dicing_rate");
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sdparams.dicing_rate = std::max(0.1f, sdparams.dicing_rate);
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state.scene->camera->update();
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sdparams.camera = state.scene->camera;
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sdparams.objecttoworld = state.tfm;
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}
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/* we don't yet support arbitrary attributes, for now add vertex
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* coordinates as generated coordinates if requested */
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if(mesh->need_attribute(state.scene, ATTR_STD_GENERATED)) {
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Attribute *attr = mesh->attributes.add(ATTR_STD_GENERATED);
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memcpy(attr->data_float3(), mesh->verts.data(), sizeof(float3)*mesh->verts.size());
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}
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}
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/* Light */
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static void xml_read_light(XMLReadState& state, pugi::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(pugi::xml_node node, Transform& tfm)
|
|
{
|
|
if(node.attribute("matrix")) {
|
|
vector<float> matrix;
|
|
if(xml_read_float_array(matrix, node, "matrix") && matrix.size() == 16)
|
|
tfm = tfm * transform_transpose((*(Transform*)&matrix[0]));
|
|
}
|
|
|
|
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, pugi::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, pugi::xml_node scene_node)
|
|
{
|
|
for(pugi::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 */
|
|
pugi::xml_document doc;
|
|
pugi::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);
|
|
|
|
pugi::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
|
|
|