Method Process

Dependencies/assimp/code/Common/TargetAnimation.cpp:182–225

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// ------------------------------------------------------------------------------------------------
void TargetAnimationHelper::Process(std::vector<aiVectorKey> *distanceTrack) {
    ai_assert(nullptr != targetPositions);
    ai_assert(nullptr != distanceTrack);

    // TODO: in most cases we won't need the extra array
    std::vector<aiVectorKey> real;

    std::vector<aiVectorKey> *fill = (distanceTrack == objectPositions ? &real : distanceTrack);
    fill->reserve(std::max(objectPositions->size(), targetPositions->size()));

    // Iterate through all object keys and interpolate their values if necessary.
    // Then get the corresponding target position, compute the difference
    // vector between object and target position. Then compute a rotation matrix
    // that rotates the base vector of the object coordinate system at that time
    // to match the diff vector.

    KeyIterator iter(objectPositions, targetPositions, &fixedMain);
    for (; !iter.Finished(); ++iter) {
        const aiVector3D &position = iter.GetCurPosition();
        const aiVector3D &tposition = iter.GetCurTargetPosition();

        // diff vector
        aiVector3D diff = tposition - position;
        ai_real f = diff.Length();

        // output distance vector
        if (f) {
            fill->push_back(aiVectorKey());
            aiVectorKey &v = fill->back();
            v.mTime = iter.GetCurTime();
            v.mValue = diff;

            diff /= f;
        } else {
            // FIXME: handle this
        }

        // diff is now the vector in which our camera is pointing
    }

    if (real.size()) {
        *distanceTrack = real;
    }
}