void getUnitMeterScalingAndUpAxisTransform(TiXmlDocument& doc, btTransform& tr, float& unitMeterScaling)
{
TiXmlElement* unitMeter = doc.RootElement()->FirstChildElement("asset")->FirstChildElement("unit");
if (unitMeter)
{
const char* meterText = unitMeter->Attribute("meter");
printf("meterText=%s\n", meterText);
unitMeterScaling = atof(meterText);
}
TiXmlElement* upAxisElem = doc.RootElement()->FirstChildElement("asset")->FirstChildElement("up_axis");
if (upAxisElem)
{
std::string upAxisTxt = upAxisElem->GetText();
if (upAxisTxt == "X_UP")
{
btQuaternion y2x(btVector3(0,0,1),SIMD_HALF_PI);
tr.setRotation(y2x);
}
if (upAxisTxt == "Y_UP")
{
//assume Y_UP for now, to be compatible with assimp?
}
if (upAxisTxt == "Z_UP")
{
btQuaternion y2z(btVector3(1,0,0),-SIMD_HALF_PI);
tr.setRotation(y2z);
}
}
}
void getUnitMeterScalingAndUpAxisTransform(TiXmlDocument& doc, btTransform& tr, float& unitMeterScaling, int clientUpAxis)
{
///todo(erwincoumans) those up-axis transformations have been quickly coded without rigorous testing
TiXmlElement* unitMeter = doc.RootElement()->FirstChildElement("asset")->FirstChildElement("unit");
if (unitMeter)
{
const char* meterText = unitMeter->Attribute("meter");
printf("meterText=%s\n", meterText);
unitMeterScaling = atof(meterText);
}
TiXmlElement* upAxisElem = doc.RootElement()->FirstChildElement("asset")->FirstChildElement("up_axis");
if (upAxisElem)
{
switch (clientUpAxis)
{
case 1:
{
std::string upAxisTxt = upAxisElem->GetText();
if (upAxisTxt == "X_UP")
{
btQuaternion x2y(btVector3(0,0,1),SIMD_HALF_PI);
tr.setRotation(x2y);
}
if (upAxisTxt == "Y_UP")
{
//assume Y_UP for now, to be compatible with assimp?
//client and COLLADA are both Z_UP so no transform needed (identity)
}
if (upAxisTxt == "Z_UP")
{
btQuaternion z2y(btVector3(1,0,0),-SIMD_HALF_PI);
tr.setRotation(z2y);
}
break;
}
case 2:
{
std::string upAxisTxt = upAxisElem->GetText();
if (upAxisTxt == "X_UP")
{
btQuaternion x2z(btVector3(0,1,0),-SIMD_HALF_PI);
tr.setRotation(x2z);
}
if (upAxisTxt == "Y_UP")
{
btQuaternion y2z(btVector3(1,0,0),SIMD_HALF_PI);
tr.setRotation(y2z);
}
if (upAxisTxt == "Z_UP")
{
//client and COLLADA are both Z_UP so no transform needed (identity)
}
break;
}
case 0:
default:
{
//we don't support X or other up axis
btAssert(0);
}
};
}
}
