// Description:
// Read a block of the stream that should contain anim curve
// data in the format determined by the animData keyword.
//
protected bool readAnimCurve(ref StreamReaderExt clipFile, ref MAnimCurveClipboardItem item)
{
MFnAnimCurve animCurve = new MFnAnimCurve();
MObject animCurveObj = new MObject();
// Anim curve defaults.
//
animBase.AnimBaseType input = wordAsInputType(kWordTypeTime);
animBase.AnimBaseType output = wordAsOutputType(kWordTypeLinear);
MFnAnimCurve.InfinityType preInf = wordAsInfinityType(kWordConstant);
MFnAnimCurve.InfinityType postInf = wordAsInfinityType(kWordConstant);
string inputUnitName = "";
animUnitNames.setToShortName(timeUnit, ref inputUnitName);
string outputUnitName = "";
MAngle.Unit tanAngleUnit = angularUnit;
bool isWeighted = false;
string dataType = "";
while (!clipFile.EndOfStream)
{
advance(ref clipFile);
dataType = asWord(ref clipFile);
if (string.Compare(dataType, kInputString) == 0) {
input = wordAsInputType(asWord(ref clipFile));
} else if (string.Compare(dataType, kOutputString) == 0) {
output = wordAsOutputType(asWord(ref clipFile));
} else if (string.Compare(dataType, kWeightedString) == 0) {
isWeighted = (asDouble(ref clipFile) == 1.0);
} else if (string.Compare(dataType, kPreInfinityString) == 0) {
preInf = wordAsInfinityType(asWord(ref clipFile));
} else if (string.Compare(dataType, kPostInfinityString) == 0) {
postInf = wordAsInfinityType(asWord(ref clipFile));
} else if (string.Compare(dataType, kInputUnitString) == 0) {
inputUnitName = asWord(ref clipFile);
} else if (string.Compare(dataType, kOutputUnitString) == 0) {
outputUnitName = asWord(ref clipFile);
} else if (string.Compare(dataType, kTanAngleUnitString) == 0) {
string tUnit = asWord(ref clipFile);
if (!animUnitNames.setFromName(tUnit, ref tanAngleUnit)) {
string unitName="";
tanAngleUnit = angularUnit;
animUnitNames.setToShortName(tanAngleUnit, ref unitName);
// Use format to place variable string into message
string msgFmt = MStringResource.getString(RegisterMStringResources.kSettingTanAngleUnit);
string msg = string.Format(msgFmt, unitName);
MGlobal.displayError(msg);
}
} else if (string.Compare(dataType, kKeysString) == 0) {
// Ignore the rest of this line.
//
clipFile.ReadLine();
break;
} else if (string.Compare(dataType, "{") == 0) {
// Skippping the '{' character. Just ignore it.
//
continue;
} else {
// An unrecogized keyword was found.
//
string warnStr = (dataType);
// Use format to place variable string into message
string msgFmt = MStringResource.getString(RegisterMStringResources.kUnknownKeyword);
string msg = string.Format(msgFmt, warnStr);
MGlobal.displayError(msg);
continue;
}
}
// Read the animCurve
//
MFnAnimCurve.AnimCurveType type = typeAsAnimCurveType(input, output);
try
{
animCurveObj = animCurve.create(type,null);
}
catch (System.Exception )
{
string msg = MStringResource.getString(RegisterMStringResources.kCouldNotCreateAnim);
MGlobal.displayError(msg);
return false;
}
animCurve.setIsWeighted(isWeighted);
animCurve.setPreInfinityType(preInf);
animCurve.setPostInfinityType(postInf);
// Set the appropriate units.
//
MTime.Unit inputTimeUnit = MTime.Unit.kInvalid;
if (input == AnimBaseType.kAnimBaseTime)
{
if (!animUnitNames.setFromName(inputUnitName, ref inputTimeUnit))
{
string unitName = "";
inputTimeUnit = timeUnit;
animUnitNames.setToShortName(inputTimeUnit, ref unitName);
// Use format to place variable string into message
string msgFmt = MStringResource.getString(RegisterMStringResources.kSettingToUnit);
string msg = string.Format(msgFmt, kInputUnitString, unitName);
MGlobal.displayWarning(msg);
}
}
MTime.Unit outputTimeUnit= MTime.Unit.kInvalid;
if (output == AnimBaseType.kAnimBaseTime)
{
if (!animUnitNames.setFromName(outputUnitName, ref outputTimeUnit))
{
string unitName = "";
outputTimeUnit = timeUnit;
animUnitNames.setToShortName(outputTimeUnit, ref unitName);
// Use format to place variable string into message
string msgFmt = MStringResource.getString(RegisterMStringResources.kSettingToUnit);
string msg = string.Format(msgFmt, kOutputUnitString, unitName);
MGlobal.displayWarning(msg);
}
}
uint index = 0;
double conversion = 1.0;
if (output == AnimBaseType.kAnimBaseLinear)
{
MDistance.Unit unit = MDistance.Unit.kInvalid;
if (outputUnitName.Length != 0)
{
if (!animUnitNames.setFromName(outputUnitName, ref unit))
{
string unitName = "";
unit = linearUnit;
animUnitNames.setToShortName(unit, ref unitName);
// Use format to place variable string into message
string msgFmt = MStringResource.getString(RegisterMStringResources.kSettingToUnit);
string msg = string.Format(msgFmt, kOutputUnitString, unitName);
MGlobal.displayWarning(msg);
}
}
else
unit = linearUnit;
if (unit != MDistance.Unit.kCentimeters)
{
MDistance one = new MDistance(1.0, unit);
conversion = one.asCentimeters;
}
}
else if (output == AnimBaseType.kAnimBaseAngular)
{
MAngle.Unit unit = MAngle.Unit.kInvalid;
if (outputUnitName.Length != 0)
{
if (!animUnitNames.setFromName(outputUnitName, ref unit))
{
string unitName = "";
unit = angularUnit;
animUnitNames.setToShortName(unit, ref unitName);
// Use format to place variable string into message
string msgFmt = MStringResource.getString(RegisterMStringResources.kSettingToUnit);
string msg = string.Format(msgFmt, kOutputUnitString, unitName);
MGlobal.displayWarning(msg);
}
}
else
unit = angularUnit;
if (unit != MAngle.Unit.kRadians)
{
MAngle one = new MAngle(1.0, unit);
conversion = one.asRadians;
}
}
// Now read each keyframe
//
advance(ref clipFile);
char c = (char)clipFile.Peek();
while (!clipFile.EndOfStream && c != kBraceRightChar)
{
double t = asDouble(ref clipFile);
double val = asDouble(ref clipFile);
MFnAnimCurve.TangentType tanIn = wordAsTangentType(asWord(ref clipFile));
MFnAnimCurve.TangentType tanOut = wordAsTangentType(asWord(ref clipFile));
switch (type)
{
case MFnAnimCurve.AnimCurveType.kAnimCurveTT:
index = animCurve.addKey( new MTime(val, inputTimeUnit),
new MTime(val, outputTimeUnit),
tanIn, tanOut, null);
break;
case MFnAnimCurve.AnimCurveType.kAnimCurveTL:
case MFnAnimCurve.AnimCurveType.kAnimCurveTA:
case MFnAnimCurve.AnimCurveType.kAnimCurveTU:
index = animCurve.addKey( new MTime(t, inputTimeUnit),
val*conversion, tanIn, tanOut,
null);
break;
case MFnAnimCurve.AnimCurveType.kAnimCurveUL:
case MFnAnimCurve.AnimCurveType.kAnimCurveUA:
case MFnAnimCurve.AnimCurveType.kAnimCurveUU:
index = animCurve.addKey( t, val*conversion,
tanIn, tanOut,
null);
break;
case MFnAnimCurve.AnimCurveType.kAnimCurveUT:
index = animCurve.addKey( t, new MTime(val, outputTimeUnit),
tanIn, tanOut,
null);
break;
default:
string msg = MStringResource.getString(RegisterMStringResources.kUnknownNode);
MGlobal.displayError(msg);
return false;
}
// Tangent locking needs to be called after the weights and
// angles are set for the fixed tangents.
//
bool tLocked = asDouble(ref clipFile) == 1.0;
bool swLocked = asDouble(ref clipFile) == 1.0;
bool isBreakdown = false;
if (animVersion >= kVersionNonWeightedAndBreakdowns)
{
isBreakdown = (asDouble(ref clipFile) == 1.0);
}
// Only fixed tangents need additional information.
//
if (tanIn == MFnAnimCurve.TangentType.kTangentFixed)
{
MAngle inAngle = new MAngle(asDouble(ref clipFile), tanAngleUnit);
double inWeight = asDouble(ref clipFile);
// If this is from a pre-Maya3.0 file, the tangent angles will
// need to be converted.
//
if (convertAnglesFromV2To3) {
convertAnglesAndWeights2To3(type,isWeighted,ref inAngle,ref inWeight);
} else if (convertAnglesFromV3To2) {
convertAnglesAndWeights3To2(type,isWeighted,ref inAngle,ref inWeight);
}
// By default, the tangents are locked. When the tangents
// are locked, setting the angle and weight of a fixed in
// tangent may change the tangent type of the out tangent.
//
animCurve.setTangentsLocked(index, false);
animCurve.setTangent(index, inAngle, inWeight, true);
}
// Only fixed tangents need additional information.
//
if (tanOut == MFnAnimCurve.TangentType.kTangentFixed)
{
MAngle outAngle = new MAngle(asDouble(ref clipFile), tanAngleUnit);
double outWeight = asDouble(ref clipFile);
// If this is from a pre-Maya3.0 file, the tangent angles will
// need to be converted.
//
if (convertAnglesFromV2To3) {
convertAnglesAndWeights2To3(type,isWeighted,ref outAngle,ref outWeight);
} else if (convertAnglesFromV3To2) {
convertAnglesAndWeights3To2(type,isWeighted,ref outAngle,ref outWeight);
}
// By default, the tangents are locked. When the tangents
// are locked, setting the angle and weight of a fixed out
// tangent may change the tangent type of the in tangent.
//
animCurve.setTangentsLocked(index, false);
animCurve.setTangent(index, outAngle, outWeight, false);
}
// To prevent tangent types from unexpectedly changing, tangent
// locking should be the last operation. See the above comments
// about fixed tangent types for more information.
//
animCurve.setWeightsLocked(index, swLocked);
animCurve.setTangentsLocked(index, tLocked);
animCurve.setIsBreakdown (index, isBreakdown);
// There should be no additional data on this line. Go to the
// next line of data.
//
clipFile.ReadLine();
// Skip any comments.
//
advance(ref clipFile);
c = (char)clipFile.Peek();
}
// Ignore the brace that marks the end of the keys block.
//
if (c == kBraceRightChar) {
clipFile.ReadLine();
}
// Ignore the brace that marks the end of the animData block.
//
advance(ref clipFile);
if ( (char)clipFile.Peek() == kBraceRightChar) {
clipFile.ReadLine();
}
else {
// Something is wrong.
//
string msg = MStringResource.getString(RegisterMStringResources.kMissingBrace);
MGlobal.displayError(msg);
}
// Do not set the clipboard with an empty clipboard item.
//
if (!animCurveObj.isNull) {
item.animCurve = animCurveObj;
}
// Delete the copy of the anim curve.
//
MGlobal.deleteNode(animCurveObj);
return true;
}