/** sample ParaEngine mesh xml file
<mesh version=1 type=0>
<boundingbox minx=0 miny=0 minz=0 maxx=1 maxy=1 maxz=1/>
<shader index=3/>
<submesh loddist=10 filename="LOD_10.x"/>
<submesh loddist=50 filename="LOD_50.x"/>
</mesh>
*/
bool ParaEngine::CParaMeshXMLFile::LoadFromBuffer(const char* pData, int nSize)
{
#ifdef PARAENGINE_MOBILE
namespace TXML = tinyxml2;
try
{
TXML::XMLDocument doc(true, TXML::COLLAPSE_WHITESPACE);
doc.Parse(pData, nSize);
TXML::XMLElement* pRoot = doc.RootElement();
if (pRoot)
{
pRoot->QueryIntAttribute("version", &m_nVersion);
if (m_nVersion < SUPPORTED_MESH_FILE_VERSION)
{
OUTPUT_LOG("can not load para mesh xml file. because of a lower file version.\n");
}
int nType = 0;
pRoot->QueryIntAttribute("type", &nType);
m_nType = (ParaMeshXMLType)nType;
for (TXML::XMLNode* pChild = pRoot->FirstChild(); pChild != 0; pChild = pChild->NextSibling())
{
TXML::XMLElement* pElement = pChild->ToElement();
if (pElement)
{
std::string tagName = pElement->Name();
if (tagName == "boundingbox")
{
pElement->QueryFloatAttribute("minx", &m_vMinPos.x);
pElement->QueryFloatAttribute("miny", &m_vMinPos.y);
pElement->QueryFloatAttribute("minz", &m_vMinPos.z);
pElement->QueryFloatAttribute("maxx", &m_vMaxPos.x);
pElement->QueryFloatAttribute("maxy", &m_vMaxPos.y);
pElement->QueryFloatAttribute("maxz", &m_vMaxPos.z);
}
else if (tagName == "shader")
{
pElement->QueryIntAttribute("index", &m_nPrimaryShader);
// TODO: for shader parameters
for (TXML::XMLNode* pSubChild = pElement->FirstChild(); pSubChild != 0; pSubChild = pSubChild->NextSibling())
{
TXML::XMLElement* pParamElement = pSubChild->ToElement();
if (pParamElement)
{
std::string tagName = pParamElement->Name();
if (tagName == "params")
{
CParameter p;
// param name
p.SetName(pParamElement->Attribute("name", ""));
p.SetTypeByString(pParamElement->Attribute("type", ""));
p.SetValueByString(pParamElement->GetText());
m_paramBlock.AddParameter(p);
}
}
}
}
else if (tagName == "submesh")
{
CSubMesh meshInfo;
pElement->QueryFloatAttribute("loddist", &meshInfo.m_fToCameraDist);
std::string filepath = pElement->Attribute("filename");
// check if it is relative path or absolute path
if (filepath.find('/') != string::npos || filepath.find('\\') != string::npos)
meshInfo.m_sFileName = filepath;
else
meshInfo.m_sFileName = m_sParentDirectory + filepath;
m_SubMeshes.push_back(meshInfo);
}
}
}
}
}
catch (...)
{
OUTPUT_LOG("error parsing xml file %s**.xml \n", m_sParentDirectory.c_str());
return false;
}
return m_SubMeshes.size() > 0;
#else
TiXmlDocument doc;
try
{
doc.Parse(pData, 0, TIXML_DEFAULT_ENCODING);
TiXmlElement* pRoot = doc.RootElement();
{
// get mesh file version
TinyXPath::xpath_processor xpathProc(pRoot, "/mesh/@version");
TinyXPath::expression_result res = xpathProc.er_compute_xpath();
TinyXPath::node_set* pNodeSet = res.nsp_get_node_set();
if(pNodeSet!=0 && pNodeSet->u_get_nb_node_in_set()>0)
{
const TiXmlAttribute* att = pNodeSet->XAp_get_attribute_in_set(0);
m_nVersion = att->IntValue();
}
}
if(m_nVersion < SUPPORTED_MESH_FILE_VERSION)
{
OUTPUT_LOG("can not load para mesh xml file. because of a lower file version.\n");
}
{
// get mesh type
TinyXPath::xpath_processor xpathProc(pRoot, "/mesh/@type");
TinyXPath::expression_result res = xpathProc.er_compute_xpath();
TinyXPath::node_set* pNodeSet = res.nsp_get_node_set();
if(pNodeSet!=0 && pNodeSet->u_get_nb_node_in_set()>0)
{
const TiXmlAttribute* att = pNodeSet->XAp_get_attribute_in_set(0);
m_nType = (ParaMeshXMLType)att->IntValue();
}
}
{
// get mesh bounding box
TinyXPath::xpath_processor xpathProc(pRoot, "/mesh/boundingbox");
TinyXPath::expression_result res = xpathProc.er_compute_xpath();
TinyXPath::node_set* pNodeSet = res.nsp_get_node_set();
if(pNodeSet!=0 && pNodeSet->u_get_nb_node_in_set()>0)
{
const TiXmlElement* pElem = pNodeSet->XNp_get_node_in_set(0)->ToElement();
// parse attributes
const TiXmlAttribute* pAttr = pElem->FirstAttribute();
if (pAttr) {
m_bHasBoundingBox = true;
for (; pAttr; pAttr = pAttr->Next())
{
string sName = pAttr->Name();
if(sName == "minx")
{
m_vMinPos.x = (float)(pAttr->DoubleValue());
}
else if(sName == "miny")
{
m_vMinPos.y = (float)(pAttr->DoubleValue());
}
else if(sName == "minz")
{
m_vMinPos.z = (float)(pAttr->DoubleValue());
}
else if(sName == "maxx")
{
m_vMaxPos.x = (float)(pAttr->DoubleValue());
}
else if(sName == "maxy")
{
m_vMaxPos.y = (float)(pAttr->DoubleValue());
}
else if(sName == "maxz")
{
m_vMaxPos.z = (float)(pAttr->DoubleValue());
}
}
}
}
}
{
// get shader index.
TinyXPath::xpath_processor xpathProc(pRoot, "/mesh/shader/@index");
TinyXPath::expression_result res = xpathProc.er_compute_xpath();
TinyXPath::node_set* pNodeSet = res.nsp_get_node_set();
if(pNodeSet!=0 && pNodeSet->u_get_nb_node_in_set()>0)
{
const TiXmlAttribute* att = pNodeSet->XAp_get_attribute_in_set(0);
m_nPrimaryShader = att->IntValue();
}
}
{
// get shader parameters.
TinyXPath::xpath_processor xpathProc(pRoot, "/mesh/shader/param");
TinyXPath::expression_result res = xpathProc.er_compute_xpath();
TinyXPath::node_set* pNodeSet = res.nsp_get_node_set();
if(pNodeSet!=0 && pNodeSet->u_get_nb_node_in_set()>0)
{
int nCount = pNodeSet->u_get_nb_node_in_set();
for(int i=0; i<nCount; ++i)
{
// for each parameter
const TiXmlNode* node = pNodeSet->XNp_get_node_in_set(i);
CParameter p;
{
// param name
TinyXPath::xpath_processor xpathProc1(node->ToElement(), "@name");
TinyXPath::expression_result res1 = xpathProc1.er_compute_xpath();
TinyXPath::node_set* pNodeSet1 = res1.nsp_get_node_set();
if(pNodeSet1!=0 && pNodeSet1->u_get_nb_node_in_set()>0)
{
const TiXmlAttribute* att = pNodeSet1->XAp_get_attribute_in_set(0);
p.SetName(att->Value());
}
}
{
// get type
TinyXPath::xpath_processor xpathProc1(node->ToElement(), "@type");
TinyXPath::expression_result res1 = xpathProc1.er_compute_xpath();
TinyXPath::node_set* pNodeSet1 = res1.nsp_get_node_set();
if(pNodeSet1!=0 && pNodeSet1->u_get_nb_node_in_set()>0)
{
const TiXmlAttribute* att = pNodeSet1->XAp_get_attribute_in_set(0);
p.SetTypeByString(att->Value());
}
}
const TiXmlElement * pParamElement = node->ToElement();
if(pParamElement)
{
// get text value
p.SetValueByString(pParamElement->GetText());
m_paramBlock.AddParameter(p);
}
}
}
}
{
// get mesh info.
TinyXPath::xpath_processor xpathProc(pRoot, "/mesh/submesh");
TinyXPath::expression_result res = xpathProc.er_compute_xpath();
TinyXPath::node_set* pNodeSet = res.nsp_get_node_set();
if(pNodeSet!=0 && pNodeSet->u_get_nb_node_in_set()>0)
{
int nCount = pNodeSet->u_get_nb_node_in_set();
m_SubMeshes.resize(nCount);
for(int i=0; i<nCount; ++i)
{
// for each sub meshes
const TiXmlNode* node = pNodeSet->XNp_get_node_in_set(i);
CSubMesh& meshInfo = m_SubMeshes[i];
{
// LOD to camera distance
TinyXPath::xpath_processor xpathProc1(node->ToElement(), "@loddist");
TinyXPath::expression_result res1 = xpathProc1.er_compute_xpath();
TinyXPath::node_set* pNodeSet1 = res1.nsp_get_node_set();
if(pNodeSet1!=0 && pNodeSet1->u_get_nb_node_in_set()>0)
{
const TiXmlAttribute* att = pNodeSet1->XAp_get_attribute_in_set(0);
meshInfo.m_fToCameraDist = (float)(att->DoubleValue());
}
}
{
// file name of the mesh
TinyXPath::xpath_processor xpathProc1(node->ToElement(), "@filename");
TinyXPath::expression_result res1 = xpathProc1.er_compute_xpath();
TinyXPath::node_set* pNodeSet1 = res1.nsp_get_node_set();
if(pNodeSet1!=0 && pNodeSet1->u_get_nb_node_in_set()>0)
{
const TiXmlAttribute* att = pNodeSet1->XAp_get_attribute_in_set(0);
string filepath = att->Value();
// check if it is relative path or absolute path
if(filepath.find('/')!=string::npos || filepath.find('\\')!=string::npos)
meshInfo.m_sFileName = filepath;
else
meshInfo.m_sFileName = m_sParentDirectory + filepath;
}
}
}
}
}
}
catch (...)
{
OUTPUT_LOG("error parsing xml file %s**.xml \n", m_sParentDirectory.c_str());
return false;
}
return true;
#endif
}
int l_select(lua_State *L) {
const char *expr = luaL_checkstring(L, 1);
TiXmlNode *node = (TiXmlNode *) lua_touserdata(L, 2);
TinyXPath::xpath_processor xpp(node, expr);
TinyXPath::expression_result res(xpp.er_compute_xpath());
if (xpp.e_error != TinyXPath::xpath_processor::e_no_error) {
string errmsg("error while computing xpath query `");
errmsg += expr;
errmsg += "'";
return luaL_error(L, errmsg.c_str());
}
switch (res.e_type) {
case TinyXPath::e_string:
lua_pushstring(L, res.cp_get_string());
return 1;
case TinyXPath::e_node_set:
{
TinyXPath::node_set* ns;
const TiXmlNode* node;
ns = res.nsp_get_node_set();
int nns(ns->u_get_nb_node_in_set());
if (nns == 0) {
lua_pushnil(L);
return 1;
}
lua_createtable(L, nns, 0);
for (int i=0; i<nns; i++) {
lua_pushinteger(L, i+1);
if (ns->o_is_attrib(i)) {
std::string attr_value = ns->S_get_value(i);
lua_pushstring(L, attr_value.c_str());
} else {
node = ns->XNp_get_node_in_set(i);
if (node->Type() == TiXmlNode::TEXT) {
lua_pushstring(L, node->Value());
break;
} else {
TiXmlNode_ud* node_userdata = (TiXmlNode_ud *) lua_newuserdata(L, sizeof(TiXmlNode_ud));
node_userdata->xmlnode = const_cast<TiXmlNode *>(node); //->Clone();
luaL_newmetatable(L, "TiXmlNode");
lua_setmetatable(L, -2);
increase_tixmldocument_refcount(L, node->GetDocument());
}
}
lua_settable(L, -3);
}
return 1;
}
case TinyXPath::e_bool:
lua_pushboolean(L, res.o_get_bool());
return 1;
case TinyXPath::e_int:
lua_pushinteger(L, res.i_get_int());
return 1;
case TinyXPath::e_double:
lua_pushnumber(L, res.d_get_double());
return 1;
case TinyXPath::e_invalid:
return luaL_error(L, "invalid xpath expression");
default:
lua_pushnil(L);
return 1;
}
}
