void MatrixAnimFromFlatBuffers(const MatrixAnimFb& params, MatrixAnim* anim) {
MatrixOpArray& ops = anim->ops();
ops.Clear(params.ops()->size());
// Count the number of splines.
int num_splines = 0;
for (auto op = params.ops()->begin(); op != params.ops()->end(); ++op) {
if (op->value_type() == MatrixOpValueFb_CompactSplineFb) num_splines++;
}
// Initialize the output structure with the correct number of splines.
MatrixAnim::Spline* splines = anim->Construct(num_splines);
// Loop through each op, adding to the MatrixAnim ops.
int spline_idx = 0;
for (auto op = params.ops()->begin(); op != params.ops()->end(); ++op) {
const MatrixOperationType op_type =
static_cast<MatrixOperationType>(op->type());
switch (op->value_type()) {
case MatrixOpValueFb_CompactSplineFb: {
const CompactSplineFb* spline_fb =
reinterpret_cast<const CompactSplineFb*>(op->value());
MatrixAnim::Spline& s = splines[spline_idx++];
// Copy the spline data into s.spline.
// TODO: modify CompactSpline so we can just point at spline data
// instead of copying it.
const Range y_range(spline_fb->y_range_start(),
spline_fb->y_range_end());
s.spline.Init(y_range, spline_fb->x_granularity(),
spline_fb->nodes()->size());
for (auto n = spline_fb->nodes()->begin();
n != spline_fb->nodes()->end(); ++n) {
s.spline.AddNodeVerbatim(n->x(), n->y(), n->angle());
}
// Hold `init` and `playback` data in structures that won't disappear,
// since these are referenced by pointer.
const bool modular = ModularOp(op_type);
const Range& op_range = RangeOfOp(op_type, y_range);
s.init = SmoothInit(op_range, modular);
ops.AddOp(op_type, s.init, s.spline);
break;
}
case MatrixOpValueFb_ConstantOpFb: {
const ConstantOpFb* const_fb =
reinterpret_cast<const ConstantOpFb*>(op->value());
ops.AddOp(op_type, const_fb->y_const());
break;
}
default:
assert(false); // Invalid FlatBuffer data.
}
}
}
static void CreateDefiningAnim(const RigAnim** anims, size_t num_anims,
RigAnim* defining_anim) {
// This function only works for animations that follow the canonical order.
for (size_t i = 0; i < num_anims; ++i) {
assert(IsCanonicalAnim(*anims[i]));
}
// Get the bone hierarchy that covers all the hierarchies in `anims`.
const RigAnim* complete_rig = FindCompleteRig(anims, num_anims);
const BoneIndex num_bones = complete_rig->NumBones();
const BoneIndex* parents = complete_rig->bone_parents();
defining_anim->Init("defining_anim", num_bones, true);
// For each bone, consider adding each operation in the canonical operations.
for (BoneIndex j = 0; j < num_bones; ++j) {
// Start initializing this bone.
MatrixAnim& matrix_anim =
defining_anim->InitMatrixAnim(j, parents[j], complete_rig->BoneName(j));
MatrixOpArray& ops = matrix_anim.ops();
// Loop through all possible operations for this bone.
Range ranges[MOTIVE_ARRAY_SIZE(kCanonicalRigAnimOps)];
for (size_t k = 0; k < MOTIVE_ARRAY_SIZE(kCanonicalRigAnimOps); ++k) {
const MatrixOperationType op = kCanonicalRigAnimOps[k];
// Loop over all anims, checking to see if they have this operation.
for (size_t i = 0; i < num_anims; ++i) {
if (j >= anims[i]->NumBones()) continue;
const MatrixOpArray::OpVector& opv = anims[i]->Anim(j).ops().ops();
const MatrixOperationInit* op_init = FindOpInit(opv, op);
if (op_init == nullptr) continue;
if (op_init->init == nullptr) {
ranges[k] = ranges[k].Include(op_init->initial_value);
} else {
const SplineInit* spline_init =
static_cast<const SplineInit*>(op_init->init);
ranges[k] = Range::Union(ranges[k], spline_init->range());
}
}
}
// Count the number of ranges that need init parameters.
int num_ops_with_init = 0;
for (size_t k = 0; k < MOTIVE_ARRAY_SIZE(kCanonicalRigAnimOps); ++k) {
if (ranges[k].Valid() && ranges[k].Length() > 0.0f) num_ops_with_init++;
}
MatrixAnim::Spline* splines = matrix_anim.Construct(num_ops_with_init);
// Create the array of matrix operations.
int num_ops_inited = 0;
for (size_t k = 0; k < MOTIVE_ARRAY_SIZE(kCanonicalRigAnimOps); ++k) {
if (!ranges[k].Valid()) continue;
// If this operation exists, add it to the `defining_anim`.
const MatrixOperationType op = kCanonicalRigAnimOps[k];
if (ranges[k].Length() == 0.0f) {
// If there is only one value for an operation, add it as a const.
const float const_value = ranges[k].start();
ops.AddOp(op, const_value);
} else {
// Otherwise, add it as an animated parameter.
// The range is modular for rotate operations, but not for scale or
// translate operations.
const bool modular = ModularOp(op);
const Range& op_range = RangeOfOp(op, ranges[k]);
splines[num_ops_inited].init = SplineInit(op_range, modular);
ops.AddOp(op, splines[num_ops_inited].init);
num_ops_inited++;
}
}
}
}