assimp/code/LWSLoader.cpp

937 lines
33 KiB
C++

/*
---------------------------------------------------------------------------
Open Asset Import Library (assimp)
---------------------------------------------------------------------------
Copyright (c) 2006-2018, assimp team
All rights reserved.
Redistribution and use of this software in source and binary forms,
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following disclaimer.
* Redistributions in binary form must reproduce the above
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following disclaimer in the documentation and/or other
materials provided with the distribution.
* Neither the name of the assimp team, nor the names of its
contributors may be used to endorse or promote products
derived from this software without specific prior
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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*/
/** @file LWSLoader.cpp
* @brief Implementation of the LWS importer class
*/
#ifndef ASSIMP_BUILD_NO_LWS_IMPORTER
#include "LWSLoader.h"
#include <assimp/ParsingUtils.h>
#include <assimp/fast_atof.h>
#include <assimp/SceneCombiner.h>
#include <assimp/GenericProperty.h>
#include <assimp/SkeletonMeshBuilder.h>
#include "ConvertToLHProcess.h"
#include "Importer.h"
#include <assimp/DefaultLogger.hpp>
#include <assimp/scene.h>
#include <assimp/IOSystem.hpp>
#include <assimp/importerdesc.h>
#include <memory>
using namespace Assimp;
static const aiImporterDesc desc = {
"LightWave Scene Importer",
"",
"",
"http://www.newtek.com/lightwave.html=",
aiImporterFlags_SupportTextFlavour,
0,
0,
0,
0,
"lws mot"
};
// ------------------------------------------------------------------------------------------------
// Recursive parsing of LWS files
void LWS::Element::Parse (const char*& buffer)
{
for (;SkipSpacesAndLineEnd(&buffer);SkipLine(&buffer)) {
// begin of a new element with children
bool sub = false;
if (*buffer == '{') {
++buffer;
SkipSpaces(&buffer);
sub = true;
}
else if (*buffer == '}')
return;
children.push_back(Element());
// copy data line - read token per token
const char* cur = buffer;
while (!IsSpaceOrNewLine(*buffer)) ++buffer;
children.back().tokens[0] = std::string(cur,(size_t) (buffer-cur));
SkipSpaces(&buffer);
if (children.back().tokens[0] == "Plugin")
{
ASSIMP_LOG_DEBUG("LWS: Skipping over plugin-specific data");
// strange stuff inside Plugin/Endplugin blocks. Needn't
// follow LWS syntax, so we skip over it
for (;SkipSpacesAndLineEnd(&buffer);SkipLine(&buffer)) {
if (!::strncmp(buffer,"EndPlugin",9)) {
//SkipLine(&buffer);
break;
}
}
continue;
}
cur = buffer;
while (!IsLineEnd(*buffer)) ++buffer;
children.back().tokens[1] = std::string(cur,(size_t) (buffer-cur));
// parse more elements recursively
if (sub)
children.back().Parse(buffer);
}
}
// ------------------------------------------------------------------------------------------------
// Constructor to be privately used by Importer
LWSImporter::LWSImporter()
: configSpeedFlag(),
io(),
first(),
last(),
fps(),
noSkeletonMesh()
{
// nothing to do here
}
// ------------------------------------------------------------------------------------------------
// Destructor, private as well
LWSImporter::~LWSImporter()
{
// nothing to do here
}
// ------------------------------------------------------------------------------------------------
// Returns whether the class can handle the format of the given file.
bool LWSImporter::CanRead( const std::string& pFile, IOSystem* pIOHandler,bool checkSig) const
{
const std::string extension = GetExtension(pFile);
if (extension == "lws" || extension == "mot")
return true;
// if check for extension is not enough, check for the magic tokens LWSC and LWMO
if (!extension.length() || checkSig) {
uint32_t tokens[2];
tokens[0] = AI_MAKE_MAGIC("LWSC");
tokens[1] = AI_MAKE_MAGIC("LWMO");
return CheckMagicToken(pIOHandler,pFile,tokens,2);
}
return false;
}
// ------------------------------------------------------------------------------------------------
// Get list of file extensions
const aiImporterDesc* LWSImporter::GetInfo () const
{
return &desc;
}
// ------------------------------------------------------------------------------------------------
// Setup configuration properties
void LWSImporter::SetupProperties(const Importer* pImp)
{
// AI_CONFIG_FAVOUR_SPEED
configSpeedFlag = (0 != pImp->GetPropertyInteger(AI_CONFIG_FAVOUR_SPEED,0));
// AI_CONFIG_IMPORT_LWS_ANIM_START
first = pImp->GetPropertyInteger(AI_CONFIG_IMPORT_LWS_ANIM_START,
150392 /* magic hack */);
// AI_CONFIG_IMPORT_LWS_ANIM_END
last = pImp->GetPropertyInteger(AI_CONFIG_IMPORT_LWS_ANIM_END,
150392 /* magic hack */);
if (last < first) {
std::swap(last,first);
}
noSkeletonMesh = pImp->GetPropertyInteger(AI_CONFIG_IMPORT_NO_SKELETON_MESHES,0) != 0;
}
// ------------------------------------------------------------------------------------------------
// Read an envelope description
void LWSImporter::ReadEnvelope(const LWS::Element& dad, LWO::Envelope& fill )
{
if (dad.children.empty()) {
DefaultLogger::get()->error("LWS: Envelope descriptions must not be empty");
return;
}
// reserve enough storage
std::list< LWS::Element >::const_iterator it = dad.children.begin();;
fill.keys.reserve(strtoul10(it->tokens[1].c_str()));
for (++it; it != dad.children.end(); ++it) {
const char* c = (*it).tokens[1].c_str();
if ((*it).tokens[0] == "Key") {
fill.keys.push_back(LWO::Key());
LWO::Key& key = fill.keys.back();
float f;
SkipSpaces(&c);
c = fast_atoreal_move<float>(c,key.value);
SkipSpaces(&c);
c = fast_atoreal_move<float>(c,f);
key.time = f;
unsigned int span = strtoul10(c,&c), num = 0;
switch (span) {
case 0:
key.inter = LWO::IT_TCB;
num = 5;
break;
case 1:
case 2:
key.inter = LWO::IT_HERM;
num = 5;
break;
case 3:
key.inter = LWO::IT_LINE;
num = 0;
break;
case 4:
key.inter = LWO::IT_STEP;
num = 0;
break;
case 5:
key.inter = LWO::IT_BEZ2;
num = 4;
break;
default:
DefaultLogger::get()->error("LWS: Unknown span type");
}
for (unsigned int i = 0; i < num;++i) {
SkipSpaces(&c);
c = fast_atoreal_move<float>(c,key.params[i]);
}
}
else if ((*it).tokens[0] == "Behaviors") {
SkipSpaces(&c);
fill.pre = (LWO::PrePostBehaviour) strtoul10(c,&c);
SkipSpaces(&c);
fill.post = (LWO::PrePostBehaviour) strtoul10(c,&c);
}
}
}
// ------------------------------------------------------------------------------------------------
// Read animation channels in the old LightWave animation format
void LWSImporter::ReadEnvelope_Old(
std::list< LWS::Element >::const_iterator& it,
const std::list< LWS::Element >::const_iterator& end,
LWS::NodeDesc& nodes,
unsigned int /*version*/)
{
unsigned int num,sub_num;
if (++it == end)goto unexpected_end;
num = strtoul10((*it).tokens[0].c_str());
for (unsigned int i = 0; i < num; ++i) {
nodes.channels.push_back(LWO::Envelope());
LWO::Envelope& envl = nodes.channels.back();
envl.index = i;
envl.type = (LWO::EnvelopeType)(i+1);
if (++it == end)goto unexpected_end;
sub_num = strtoul10((*it).tokens[0].c_str());
for (unsigned int n = 0; n < sub_num;++n) {
if (++it == end)goto unexpected_end;
// parse value and time, skip the rest for the moment.
LWO::Key key;
const char* c = fast_atoreal_move<float>((*it).tokens[0].c_str(),key.value);
SkipSpaces(&c);
float f;
fast_atoreal_move<float>((*it).tokens[0].c_str(),f);
key.time = f;
envl.keys.push_back(key);
}
}
return;
unexpected_end:
DefaultLogger::get()->error("LWS: Encountered unexpected end of file while parsing object motion");
}
// ------------------------------------------------------------------------------------------------
// Setup a nice name for a node
void LWSImporter::SetupNodeName(aiNode* nd, LWS::NodeDesc& src)
{
const unsigned int combined = src.number | ((unsigned int)src.type) << 28u;
// the name depends on the type. We break LWS's strange naming convention
// and return human-readable, but still machine-parsable and unique, strings.
if (src.type == LWS::NodeDesc::OBJECT) {
if (src.path.length()) {
std::string::size_type s = src.path.find_last_of("\\/");
if (s == std::string::npos)
s = 0;
else ++s;
std::string::size_type t = src.path.substr(s).find_last_of(".");
nd->mName.length = ::ai_snprintf(nd->mName.data, MAXLEN, "%s_(%08X)",src.path.substr(s).substr(0,t).c_str(),combined);
return;
}
}
nd->mName.length = ::ai_snprintf(nd->mName.data, MAXLEN, "%s_(%08X)",src.name,combined);
}
// ------------------------------------------------------------------------------------------------
// Recursively build the scenegraph
void LWSImporter::BuildGraph(aiNode* nd, LWS::NodeDesc& src, std::vector<AttachmentInfo>& attach,
BatchLoader& batch,
aiCamera**& camOut,
aiLight**& lightOut,
std::vector<aiNodeAnim*>& animOut)
{
// Setup a very cryptic name for the node, we want the user to be happy
SetupNodeName(nd,src);
aiNode* ndAnim = nd;
// If the node is an object
if (src.type == LWS::NodeDesc::OBJECT) {
// If the object is from an external file, get it
aiScene* obj = NULL;
if (src.path.length() ) {
obj = batch.GetImport(src.id);
if (!obj) {
DefaultLogger::get()->error("LWS: Failed to read external file " + src.path);
}
else {
if (obj->mRootNode->mNumChildren == 1) {
//If the pivot is not set for this layer, get it from the external object
if (!src.isPivotSet) {
src.pivotPos.x = +obj->mRootNode->mTransformation.a4;
src.pivotPos.y = +obj->mRootNode->mTransformation.b4;
src.pivotPos.z = -obj->mRootNode->mTransformation.c4; //The sign is the RH to LH back conversion
}
//Remove first node from obj (the old pivot), reset transform of second node (the mesh node)
aiNode* newRootNode = obj->mRootNode->mChildren[0];
obj->mRootNode->mChildren[0] = NULL;
delete obj->mRootNode;
obj->mRootNode = newRootNode;
obj->mRootNode->mTransformation.a4 = 0.0;
obj->mRootNode->mTransformation.b4 = 0.0;
obj->mRootNode->mTransformation.c4 = 0.0;
}
}
}
//Setup the pivot node (also the animation node), the one we received
nd->mName = std::string("Pivot:") + nd->mName.data;
ndAnim = nd;
//Add the attachment node to it
nd->mNumChildren = 1;
nd->mChildren = new aiNode*[1];
nd->mChildren[0] = new aiNode();
nd->mChildren[0]->mParent = nd;
nd->mChildren[0]->mTransformation.a4 = -src.pivotPos.x;
nd->mChildren[0]->mTransformation.b4 = -src.pivotPos.y;
nd->mChildren[0]->mTransformation.c4 = -src.pivotPos.z;
SetupNodeName(nd->mChildren[0], src);
//Update the attachment node
nd = nd->mChildren[0];
//Push attachment, if the object came from an external file
if (obj) {
attach.push_back(AttachmentInfo(obj,nd));
}
}
// If object is a light source - setup a corresponding ai structure
else if (src.type == LWS::NodeDesc::LIGHT) {
aiLight* lit = *lightOut++ = new aiLight();
// compute final light color
lit->mColorDiffuse = lit->mColorSpecular = src.lightColor*src.lightIntensity;
// name to attach light to node -> unique due to LWs indexing system
lit->mName = nd->mName;
// detemine light type and setup additional members
if (src.lightType == 2) { /* spot light */
lit->mType = aiLightSource_SPOT;
lit->mAngleInnerCone = (float)AI_DEG_TO_RAD( src.lightConeAngle );
lit->mAngleOuterCone = lit->mAngleInnerCone+(float)AI_DEG_TO_RAD( src.lightEdgeAngle );
}
else if (src.lightType == 1) { /* directional light source */
lit->mType = aiLightSource_DIRECTIONAL;
}
else lit->mType = aiLightSource_POINT;
// fixme: no proper handling of light falloffs yet
if (src.lightFalloffType == 1)
lit->mAttenuationConstant = 1.f;
else if (src.lightFalloffType == 1)
lit->mAttenuationLinear = 1.f;
else
lit->mAttenuationQuadratic = 1.f;
}
// If object is a camera - setup a corresponding ai structure
else if (src.type == LWS::NodeDesc::CAMERA) {
aiCamera* cam = *camOut++ = new aiCamera();
// name to attach cam to node -> unique due to LWs indexing system
cam->mName = nd->mName;
}
// Get the node transformation from the LWO key
LWO::AnimResolver resolver(src.channels,fps);
resolver.ExtractBindPose(ndAnim->mTransformation);
// .. and construct animation channels
aiNodeAnim* anim = NULL;
if (first != last) {
resolver.SetAnimationRange(first,last);
resolver.ExtractAnimChannel(&anim,AI_LWO_ANIM_FLAG_SAMPLE_ANIMS|AI_LWO_ANIM_FLAG_START_AT_ZERO);
if (anim) {
anim->mNodeName = ndAnim->mName;
animOut.push_back(anim);
}
}
// Add children
if (!src.children.empty()) {
nd->mChildren = new aiNode*[src.children.size()];
for (std::list<LWS::NodeDesc*>::iterator it = src.children.begin(); it != src.children.end(); ++it) {
aiNode* ndd = nd->mChildren[nd->mNumChildren++] = new aiNode();
ndd->mParent = nd;
BuildGraph(ndd,**it,attach,batch,camOut,lightOut,animOut);
}
}
}
// ------------------------------------------------------------------------------------------------
// Determine the exact location of a LWO file
std::string LWSImporter::FindLWOFile(const std::string& in)
{
// insert missing directory separator if necessary
std::string tmp;
if (in.length() > 3 && in[1] == ':'&& in[2] != '\\' && in[2] != '/')
{
tmp = in[0] + (std::string(":\\") + in.substr(2));
}
else tmp = in;
if (io->Exists(tmp)) {
return in;
}
// file is not accessible for us ... maybe it's packed by
// LightWave's 'Package Scene' command?
// Relevant for us are the following two directories:
// <folder>\Objects\<hh>\<*>.lwo
// <folder>\Scenes\<hh>\<*>.lws
// where <hh> is optional.
std::string test = std::string("..") + (io->getOsSeparator() + tmp);
if (io->Exists(test)) {
return test;
}
test = std::string("..") + (io->getOsSeparator() + test);
if (io->Exists(test)) {
return test;
}
// return original path, maybe the IOsystem knows better
return tmp;
}
// ------------------------------------------------------------------------------------------------
// Read file into given scene data structure
void LWSImporter::InternReadFile( const std::string& pFile, aiScene* pScene,
IOSystem* pIOHandler)
{
io = pIOHandler;
std::unique_ptr<IOStream> file( pIOHandler->Open( pFile, "rb"));
// Check whether we can read from the file
if( file.get() == NULL) {
throw DeadlyImportError( "Failed to open LWS file " + pFile + ".");
}
// Allocate storage and copy the contents of the file to a memory buffer
std::vector< char > mBuffer;
TextFileToBuffer(file.get(),mBuffer);
// Parse the file structure
LWS::Element root; const char* dummy = &mBuffer[0];
root.Parse(dummy);
// Construct a Batchimporter to read more files recursively
BatchLoader batch(pIOHandler);
// batch.SetBasePath(pFile);
// Construct an array to receive the flat output graph
std::list<LWS::NodeDesc> nodes;
unsigned int cur_light = 0, cur_camera = 0, cur_object = 0;
unsigned int num_light = 0, num_camera = 0, num_object = 0;
// check magic identifier, 'LWSC'
bool motion_file = false;
std::list< LWS::Element >::const_iterator it = root.children.begin();
if ((*it).tokens[0] == "LWMO")
motion_file = true;
if ((*it).tokens[0] != "LWSC" && !motion_file)
throw DeadlyImportError("LWS: Not a LightWave scene, magic tag LWSC not found");
// get file format version and print to log
++it;
unsigned int version = strtoul10((*it).tokens[0].c_str());
DefaultLogger::get()->info("LWS file format version is " + (*it).tokens[0]);
first = 0.;
last = 60.;
fps = 25.; /* seems to be a good default frame rate */
// Now read all elements in a very straghtforward manner
for (; it != root.children.end(); ++it) {
const char* c = (*it).tokens[1].c_str();
// 'FirstFrame': begin of animation slice
if ((*it).tokens[0] == "FirstFrame") {
if (150392. != first /* see SetupProperties() */)
first = strtoul10(c,&c)-1.; /* we're zero-based */
}
// 'LastFrame': end of animation slice
else if ((*it).tokens[0] == "LastFrame") {
if (150392. != last /* see SetupProperties() */)
last = strtoul10(c,&c)-1.; /* we're zero-based */
}
// 'FramesPerSecond': frames per second
else if ((*it).tokens[0] == "FramesPerSecond") {
fps = strtoul10(c,&c);
}
// 'LoadObjectLayer': load a layer of a specific LWO file
else if ((*it).tokens[0] == "LoadObjectLayer") {
// get layer index
const int layer = strtoul10(c,&c);
// setup the layer to be loaded
BatchLoader::PropertyMap props;
SetGenericProperty(props.ints,AI_CONFIG_IMPORT_LWO_ONE_LAYER_ONLY,layer);
// add node to list
LWS::NodeDesc d;
d.type = LWS::NodeDesc::OBJECT;
if (version >= 4) { // handle LWSC 4 explicit ID
SkipSpaces(&c);
d.number = strtoul16(c,&c) & AI_LWS_MASK;
}
else d.number = cur_object++;
// and add the file to the import list
SkipSpaces(&c);
std::string path = FindLWOFile( c );
d.path = path;
d.id = batch.AddLoadRequest(path,0,&props);
nodes.push_back(d);
num_object++;
}
// 'LoadObject': load a LWO file into the scenegraph
else if ((*it).tokens[0] == "LoadObject") {
// add node to list
LWS::NodeDesc d;
d.type = LWS::NodeDesc::OBJECT;
if (version >= 4) { // handle LWSC 4 explicit ID
d.number = strtoul16(c,&c) & AI_LWS_MASK;
SkipSpaces(&c);
}
else d.number = cur_object++;
std::string path = FindLWOFile( c );
d.id = batch.AddLoadRequest(path,0,NULL);
d.path = path;
nodes.push_back(d);
num_object++;
}
// 'AddNullObject': add a dummy node to the hierarchy
else if ((*it).tokens[0] == "AddNullObject") {
// add node to list
LWS::NodeDesc d;
d.type = LWS::NodeDesc::OBJECT;
if (version >= 4) { // handle LWSC 4 explicit ID
d.number = strtoul16(c,&c) & AI_LWS_MASK;
SkipSpaces(&c);
}
else d.number = cur_object++;
d.name = c;
nodes.push_back(d);
num_object++;
}
// 'NumChannels': Number of envelope channels assigned to last layer
else if ((*it).tokens[0] == "NumChannels") {
// ignore for now
}
// 'Channel': preceedes any envelope description
else if ((*it).tokens[0] == "Channel") {
if (nodes.empty()) {
if (motion_file) {
// LightWave motion file. Add dummy node
LWS::NodeDesc d;
d.type = LWS::NodeDesc::OBJECT;
d.name = c;
d.number = cur_object++;
nodes.push_back(d);
}
else DefaultLogger::get()->error("LWS: Unexpected keyword: \'Channel\'");
}
// important: index of channel
nodes.back().channels.push_back(LWO::Envelope());
LWO::Envelope& env = nodes.back().channels.back();
env.index = strtoul10(c);
// currently we can just interpret the standard channels 0...9
// (hack) assume that index-i yields the binary channel type from LWO
env.type = (LWO::EnvelopeType)(env.index+1);
}
// 'Envelope': a single animation channel
else if ((*it).tokens[0] == "Envelope") {
if (nodes.empty() || nodes.back().channels.empty())
DefaultLogger::get()->error("LWS: Unexpected keyword: \'Envelope\'");
else {
ReadEnvelope((*it),nodes.back().channels.back());
}
}
// 'ObjectMotion': animation information for older lightwave formats
else if (version < 3 && ((*it).tokens[0] == "ObjectMotion" ||
(*it).tokens[0] == "CameraMotion" ||
(*it).tokens[0] == "LightMotion")) {
if (nodes.empty())
DefaultLogger::get()->error("LWS: Unexpected keyword: \'<Light|Object|Camera>Motion\'");
else {
ReadEnvelope_Old(it,root.children.end(),nodes.back(),version);
}
}
// 'Pre/PostBehavior': pre/post animation behaviour for LWSC 2
else if (version == 2 && (*it).tokens[0] == "Pre/PostBehavior") {
if (nodes.empty())
DefaultLogger::get()->error("LWS: Unexpected keyword: \'Pre/PostBehavior'");
else {
for (std::list<LWO::Envelope>::iterator it = nodes.back().channels.begin(); it != nodes.back().channels.end(); ++it) {
// two ints per envelope
LWO::Envelope& env = *it;
env.pre = (LWO::PrePostBehaviour) strtoul10(c,&c); SkipSpaces(&c);
env.post = (LWO::PrePostBehaviour) strtoul10(c,&c); SkipSpaces(&c);
}
}
}
// 'ParentItem': specifies the parent of the current element
else if ((*it).tokens[0] == "ParentItem") {
if (nodes.empty())
DefaultLogger::get()->error("LWS: Unexpected keyword: \'ParentItem\'");
else nodes.back().parent = strtoul16(c,&c);
}
// 'ParentObject': deprecated one for older formats
else if (version < 3 && (*it).tokens[0] == "ParentObject") {
if (nodes.empty())
DefaultLogger::get()->error("LWS: Unexpected keyword: \'ParentObject\'");
else {
nodes.back().parent = strtoul10(c,&c) | (1u << 28u);
}
}
// 'AddCamera': add a camera to the scenegraph
else if ((*it).tokens[0] == "AddCamera") {
// add node to list
LWS::NodeDesc d;
d.type = LWS::NodeDesc::CAMERA;
if (version >= 4) { // handle LWSC 4 explicit ID
d.number = strtoul16(c,&c) & AI_LWS_MASK;
}
else d.number = cur_camera++;
nodes.push_back(d);
num_camera++;
}
// 'CameraName': set name of currently active camera
else if ((*it).tokens[0] == "CameraName") {
if (nodes.empty() || nodes.back().type != LWS::NodeDesc::CAMERA)
DefaultLogger::get()->error("LWS: Unexpected keyword: \'CameraName\'");
else nodes.back().name = c;
}
// 'AddLight': add a light to the scenegraph
else if ((*it).tokens[0] == "AddLight") {
// add node to list
LWS::NodeDesc d;
d.type = LWS::NodeDesc::LIGHT;
if (version >= 4) { // handle LWSC 4 explicit ID
d.number = strtoul16(c,&c) & AI_LWS_MASK;
}
else d.number = cur_light++;
nodes.push_back(d);
num_light++;
}
// 'LightName': set name of currently active light
else if ((*it).tokens[0] == "LightName") {
if (nodes.empty() || nodes.back().type != LWS::NodeDesc::LIGHT)
DefaultLogger::get()->error("LWS: Unexpected keyword: \'LightName\'");
else nodes.back().name = c;
}
// 'LightIntensity': set intensity of currently active light
else if ((*it).tokens[0] == "LightIntensity" || (*it).tokens[0] == "LgtIntensity" ) {
if (nodes.empty() || nodes.back().type != LWS::NodeDesc::LIGHT)
DefaultLogger::get()->error("LWS: Unexpected keyword: \'LightIntensity\'");
else fast_atoreal_move<float>(c, nodes.back().lightIntensity );
}
// 'LightType': set type of currently active light
else if ((*it).tokens[0] == "LightType") {
if (nodes.empty() || nodes.back().type != LWS::NodeDesc::LIGHT)
DefaultLogger::get()->error("LWS: Unexpected keyword: \'LightType\'");
else nodes.back().lightType = strtoul10(c);
}
// 'LightFalloffType': set falloff type of currently active light
else if ((*it).tokens[0] == "LightFalloffType") {
if (nodes.empty() || nodes.back().type != LWS::NodeDesc::LIGHT)
DefaultLogger::get()->error("LWS: Unexpected keyword: \'LightFalloffType\'");
else nodes.back().lightFalloffType = strtoul10(c);
}
// 'LightConeAngle': set cone angle of currently active light
else if ((*it).tokens[0] == "LightConeAngle") {
if (nodes.empty() || nodes.back().type != LWS::NodeDesc::LIGHT)
DefaultLogger::get()->error("LWS: Unexpected keyword: \'LightConeAngle\'");
else nodes.back().lightConeAngle = fast_atof(c);
}
// 'LightEdgeAngle': set area where we're smoothing from min to max intensity
else if ((*it).tokens[0] == "LightEdgeAngle") {
if (nodes.empty() || nodes.back().type != LWS::NodeDesc::LIGHT)
DefaultLogger::get()->error("LWS: Unexpected keyword: \'LightEdgeAngle\'");
else nodes.back().lightEdgeAngle = fast_atof(c);
}
// 'LightColor': set color of currently active light
else if ((*it).tokens[0] == "LightColor") {
if (nodes.empty() || nodes.back().type != LWS::NodeDesc::LIGHT)
DefaultLogger::get()->error("LWS: Unexpected keyword: \'LightColor\'");
else {
c = fast_atoreal_move<float>(c, (float&) nodes.back().lightColor.r );
SkipSpaces(&c);
c = fast_atoreal_move<float>(c, (float&) nodes.back().lightColor.g );
SkipSpaces(&c);
c = fast_atoreal_move<float>(c, (float&) nodes.back().lightColor.b );
}
}
// 'PivotPosition': position of local transformation origin
else if ((*it).tokens[0] == "PivotPosition" || (*it).tokens[0] == "PivotPoint") {
if (nodes.empty())
DefaultLogger::get()->error("LWS: Unexpected keyword: \'PivotPosition\'");
else {
c = fast_atoreal_move<float>(c, (float&) nodes.back().pivotPos.x );
SkipSpaces(&c);
c = fast_atoreal_move<float>(c, (float&) nodes.back().pivotPos.y );
SkipSpaces(&c);
c = fast_atoreal_move<float>(c, (float&) nodes.back().pivotPos.z );
// Mark pivotPos as set
nodes.back().isPivotSet = true;
}
}
}
// resolve parenting
for (std::list<LWS::NodeDesc>::iterator it = nodes.begin(); it != nodes.end(); ++it) {
// check whether there is another node which calls us a parent
for (std::list<LWS::NodeDesc>::iterator dit = nodes.begin(); dit != nodes.end(); ++dit) {
if (dit != it && *it == (*dit).parent) {
if ((*dit).parent_resolved) {
// fixme: it's still possible to produce an overflow due to cross references ..
DefaultLogger::get()->error("LWS: Found cross reference in scenegraph");
continue;
}
(*it).children.push_back(&*dit);
(*dit).parent_resolved = &*it;
}
}
}
// find out how many nodes have no parent yet
unsigned int no_parent = 0;
for (std::list<LWS::NodeDesc>::iterator it = nodes.begin(); it != nodes.end(); ++it) {
if (!(*it).parent_resolved)
++ no_parent;
}
if (!no_parent)
throw DeadlyImportError("LWS: Unable to find scene root node");
// Load all subsequent files
batch.LoadAll();
// and build the final output graph by attaching the loaded external
// files to ourselves. first build a master graph
aiScene* master = new aiScene();
aiNode* nd = master->mRootNode = new aiNode();
// allocate storage for cameras&lights
if (num_camera) {
master->mCameras = new aiCamera*[master->mNumCameras = num_camera];
}
aiCamera** cams = master->mCameras;
if (num_light) {
master->mLights = new aiLight*[master->mNumLights = num_light];
}
aiLight** lights = master->mLights;
std::vector<AttachmentInfo> attach;
std::vector<aiNodeAnim*> anims;
nd->mName.Set("<LWSRoot>");
nd->mChildren = new aiNode*[no_parent];
for (std::list<LWS::NodeDesc>::iterator it = nodes.begin(); it != nodes.end(); ++it) {
if (!(*it).parent_resolved) {
aiNode* ro = nd->mChildren[ nd->mNumChildren++ ] = new aiNode();
ro->mParent = nd;
// ... and build the scene graph. If we encounter object nodes,
// add then to our attachment table.
BuildGraph(ro,*it, attach, batch, cams, lights, anims);
}
}
// create a master animation channel for us
if (anims.size()) {
master->mAnimations = new aiAnimation*[master->mNumAnimations = 1];
aiAnimation* anim = master->mAnimations[0] = new aiAnimation();
anim->mName.Set("LWSMasterAnim");
// LWS uses seconds as time units, but we convert to frames
anim->mTicksPerSecond = fps;
anim->mDuration = last-(first-1); /* fixme ... zero or one-based?*/
anim->mChannels = new aiNodeAnim*[anim->mNumChannels = static_cast<unsigned int>(anims.size())];
std::copy(anims.begin(),anims.end(),anim->mChannels);
}
// convert the master scene to RH
MakeLeftHandedProcess monster_cheat;
monster_cheat.Execute(master);
// .. ccw
FlipWindingOrderProcess flipper;
flipper.Execute(master);
// OK ... finally build the output graph
SceneCombiner::MergeScenes(&pScene,master,attach,
AI_INT_MERGE_SCENE_GEN_UNIQUE_NAMES | (!configSpeedFlag ? (
AI_INT_MERGE_SCENE_GEN_UNIQUE_NAMES_IF_NECESSARY | AI_INT_MERGE_SCENE_GEN_UNIQUE_MATNAMES) : 0));
// Check flags
if (!pScene->mNumMeshes || !pScene->mNumMaterials) {
pScene->mFlags |= AI_SCENE_FLAGS_INCOMPLETE;
if (pScene->mNumAnimations && !noSkeletonMesh) {
// construct skeleton mesh
SkeletonMeshBuilder builder(pScene);
}
}
}
#endif // !! ASSIMP_BUILD_NO_LWS_IMPORTER