@Override
public void process(
TDSFile file,
AppearanceFactory appFactory,
GeometryFactory geomFactory,
NodeFactory nodeFactory,
AnimationFactory animFactory,
SpecialItemsHandler siHandler,
ModelContext context,
int length)
throws IOException {
/*int flags = */ file.readUnsignedShort();
// int animType = flags & 0x03; // should be one of 0, 2, 3.
// boolean lockX = ( ( flags & 8 ) != 0 );
// boolean lockY = ( ( flags & 16 ) != 0 );
// boolean lockZ = ( ( flags & 32 ) != 0 );
// boolean unlinkX = ( ( flags & 64 ) != 0 );
// boolean unlinkY = ( ( flags & 128 ) != 0 );
// boolean unlinkZ = ( ( flags & 256 ) != 0 );
// System.out.println( "flags: " + Integer.toBinaryString( flags ) );
file.skipBytes(8); // four unknown ushorts.
int numKeys = file.readUnsignedInt();
context.translation = new PosTransform();
JAGTLog.debug("Translation key frames: ", numKeys);
for (int i = 0; i < numKeys; i++) {
int frameNumber = file.readUnsignedInt();
int accelerationData = file.readUnsignedShort();
getSplineTerms(accelerationData, file);
float x = file.readFloat();
float y = file.readFloat();
float z = file.readFloat();
Vector3f translation;
if ((numKeys == 1) && (x == 0f) && (y == 0f) && (z == 0f)) translation = null;
else translation = new Vector3f(x, y, z);
// translation = new Vector3f( x, z, -y );
if (context.pivot == null) {
context.pivot = new Point3f(0f, 0f, 0f);
}
JAGTLog.debug("\tTranslation key frame: ", frameNumber + " : ", translation);
context.translation.addKeyFrame(
frameNumber, (float) frameNumber / (float) context.framesCount, translation);
}
checkAndApplyTransform(
context, false, nodeFactory, animFactory, siHandler, file.convertZup2Yup());
}
/**
* This only reads the spline data and should be part of the track header when it gets invented.
*
* <p>The possible spline values are are
*
* <ol>
* <li>Tension
* <li>Continuity
* <li>Bias
* <li>EaseTo
* <li>EaseFrom
* </ol>
*
* @param accelerationData an integer representing the bits that determine which of the five
* possible spline terms are present in the data and should be read.
* @param file
*/
private void getSplineTerms(final int accelerationData, TDSFile file) throws IOException {
if (accelerationData == 0) return;
int bits = accelerationData;
for (int i = 0; i < 5; i++) {
bits = bits >>> i;
if ((bits & 1) == 1) {
file.readFloat();
}
}
}