public void update(double t) {
super.update(t);
if (m_value != null) {
double portion = getPortion(t);
double x = m_xHermite.evaluate(portion);
double y = m_yHermite.evaluate(portion);
double z = m_zHermite.evaluate(portion);
m_value.setPositionRightNow(x, y, z, m_subject);
edu.cmu.cs.stage3.math.Quaternion q =
edu.cmu.cs.stage3.math.Quaternion.interpolate(
m_quaternion0, m_quaternion1, getPortion(t));
m_value.setOrientationRightNow(q, m_subject);
}
}
public void prologue(double t) {
m_subject = subject.getModelVisualizationValue();
m_value = item.getModelValue();
Model prev = m_subject.getItem();
if (prev != null && prev != m_value) {
prev.visualization.set(null);
}
if (m_value != null) {
// todo?
m_value.visualization.set(null);
Matrix44 transformation0 = m_value.getTransformation(m_subject);
Matrix44 transformation1 = new Matrix44(m_subject.getTransformationFor(m_value));
m_quaternion0 = transformation0.getAxes().getQuaternion();
m_quaternion1 = transformation1.getAxes().getQuaternion();
double dx = transformation0.m30 - transformation1.m30;
double dy = transformation0.m31 - transformation1.m31;
double dz = transformation0.m32 - transformation1.m32;
double distance = Math.sqrt(dx * dx + dy * dy + dz * dz);
double s = distance / 2;
m_xHermite =
new HermiteCubic(
transformation0.m30,
transformation1.m30,
transformation0.m20 * s,
transformation1.m20 * s);
m_yHermite =
new HermiteCubic(
transformation0.m31,
transformation1.m31,
transformation0.m21 * s,
transformation1.m21 * s);
m_zHermite =
new HermiteCubic(
transformation0.m32,
transformation1.m32,
transformation0.m22 * s,
transformation1.m22 * s);
}
super.prologue(t);
}
public void epilogue(double t) {
super.epilogue(t);
m_subject.setItem(m_value);
}