static
bool
_GetTimeAndValueArrayForUsdAttribute(
const UsdAttribute& usdAttr,
const GfInterval& timeInterval,
MTimeArray* timeArray,
MDoubleArray* valueArray,
const MDistance::Unit convertToUnit = MDistance::kMillimeters)
{
static const TfType& floatType = TfType::Find<float>();
std::vector<double> timeSamples;
if (!_CheckUsdTypeAndResizeArrays(usdAttr,
floatType,
timeInterval,
&timeSamples,
timeArray,
valueArray)) {
return false;
}
size_t numTimeSamples = timeSamples.size();
for (size_t i = 0; i < numTimeSamples; ++i) {
const double timeSample = timeSamples[i];
float attrValue;
if (!usdAttr.Get(&attrValue, timeSample)) {
return false;
}
switch (convertToUnit) {
case MDistance::kInches:
attrValue = UsdMayaUtil::ConvertMMToInches(attrValue);
break;
case MDistance::kCentimeters:
attrValue = UsdMayaUtil::ConvertMMToCM(attrValue);
break;
default:
// The input is expected to be in millimeters.
break;
}
timeArray->set(MTime(timeSample), i);
valueArray->set(attrValue, i);
}
return true;
}
static
bool
_GetTimeAndValueArrayForUsdAttribute(
const UsdAttribute& usdAttr,
const PxrUsdMayaPrimReaderArgs& args,
MTimeArray* timeArray,
MDoubleArray* valueArray,
bool millimetersToInches=false)
{
static const TfType& floatType = TfType::Find<float>();
std::vector<double> timeSamples;
if (!_CheckUsdTypeAndResizeArrays(usdAttr,
floatType,
args,
&timeSamples,
timeArray,
valueArray)) {
return false;
}
size_t numTimeSamples = timeSamples.size();
for (size_t i = 0; i < numTimeSamples; ++i) {
const double timeSample = timeSamples[i];
float attrValue;
if (!usdAttr.Get(&attrValue, timeSample)) {
return false;
}
if (millimetersToInches) {
attrValue = PxrUsdMayaUtil::ConvertMMToInches(attrValue);
}
timeArray->set(MTime(timeSample), i);
valueArray->set(attrValue, i);
}
return true;
}
// This is primarily intended for use in translating the clippingRange
// USD attribute which is stored in USD as a single GfVec2f value but
// in Maya as separate nearClipPlane and farClipPlane attributes.
static
bool
_GetTimeAndValueArraysForUsdAttribute(
const UsdAttribute& usdAttr,
const GfInterval& timeInterval,
MTimeArray* timeArray,
MDoubleArray* valueArray1,
MDoubleArray* valueArray2)
{
static const TfType& vec2fType = TfType::Find<GfVec2f>();
std::vector<double> timeSamples;
if (!_CheckUsdTypeAndResizeArrays(usdAttr,
vec2fType,
timeInterval,
&timeSamples,
timeArray,
valueArray1)) {
return false;
}
size_t numTimeSamples = timeSamples.size();
valueArray2->setLength(numTimeSamples);
for (size_t i = 0; i < numTimeSamples; ++i) {
const double timeSample = timeSamples[i];
GfVec2f attrValue;
if (!usdAttr.Get(&attrValue, timeSample)) {
return false;
}
timeArray->set(MTime(timeSample), i);
valueArray1->set(attrValue[0], i);
valueArray2->set(attrValue[1], i);
}
return true;
}
