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#include "motion_clip.h"
#include <fstream>
#include "amc_util.h"
#include "simple_parser.h"
MotionClip::MotionClip() {
}
MotionClip::~MotionClip() {
}
int MotionClip::size() const {
return (int)frames_.size();
}
Pose MotionClip::pose(int frame_num) const {
return frames_[frame_num];
}
Pose& MotionClip::pose(int frame_num) {
return frames_[frame_num];
}
void MotionClip::TrimFront(int num_frames) {
frames_.erase(frames_.begin(), frames_.begin() + num_frames);
}
void MotionClip::TrimBack(int num_frames) {
frames_.erase(frames_.end()-num_frames-1, frames_.end()-1);
}
void MotionClip::PrependPose(const Pose &pose) {
frames_.insert(frames_.begin(), pose);
}
void MotionClip::AppendPose(const Pose &pose) {
frames_.push_back(pose);
}
void MotionClip::PrependClip(const MotionClip &clip, int num_blend_frames) {
for (int i=0; i < clip.size()-num_blend_frames; i++) {
frames_.insert(frames_.begin(), clip[i]);
}
for (int i=0; i<num_blend_frames; i++) {
int clip_index = clip.size() - num_blend_frames + i;
int orig_index = clip_index;
float alpha = (float)i/(float)(num_blend_frames-1); // 0.0 to 1.0
Pose blended = clip[clip_index].Lerp(frames_[orig_index], alpha);
frames_[orig_index] = blended;
}
}
void MotionClip::AppendClip(const MotionClip &clip, int num_blend_frames) {
for (int i=0; i<num_blend_frames; i++) {
int clip_index = i;
int orig_index = (int)frames_.size() - num_blend_frames + i;
float alpha = (float)i/(float)(num_blend_frames-1); // 0.0 to 1.0
Pose blended = frames_[orig_index].Lerp(clip[clip_index], alpha);
frames_[orig_index] = blended;
}
for (int i=num_blend_frames; i < clip.size(); i++) {
frames_.push_back(clip[i]);
}
}
void MotionClip::MakeLoop(int num_blend_frames) {
MotionClip tmp_clip;
for (int i=0; i<num_blend_frames; i++) {
tmp_clip.PrependPose(frames_.back());
frames_.pop_back();
}
for (int i=0; i<tmp_clip.size(); i++) {
float alpha = (float)i/(float)(tmp_clip.size()-1);
frames_[i] = tmp_clip[i].Lerp(frames_[i], alpha);
}
}
void MotionClip::CalcRelativeTranslations() {
Point3 prev_pos = frames_[0].root_position();
for (int i=0; i<frames_.size(); i++) {
Point3 cur_pos = frames_[i].root_position();
frames_[i].set_root_relative_translation(cur_pos - prev_pos);
prev_pos = cur_pos;
}
}
Pose MotionClip::operator[](const int frame_num) const {
return frames_[frame_num];
}
Pose& MotionClip::operator[](const int frame_num) {
return frames_[frame_num];
}
void MotionClip::LoadFromAMC(const std::string &filename, const Skeleton &skeleton) {
std::ifstream ifs(filename.c_str());
SimpleParser parser(&ifs);
parser.SwallowLine();
parser.SwallowLine();
parser.SwallowLine();
while (parser.Good()) {
Pose frame;
int frame_num;
parser.ReadInt(frame_num);
if (!parser.Good()) {
return;
}
frame.set_frame_number(frame_num);
while (!parser.UpcomingInt()) {
std::string bone;
parser.ReadToken(bone);
if (!parser.Good()) {
return;
}
if (bone == "root") {
Point3 position;
parser.ReadFloat(position[0]);
parser.ReadFloat(position[1]);
parser.ReadFloat(position[2]);
position = amc2meter(position);
frame.set_root_position(position);
Vector3 orientation;
parser.ReadFloat(orientation[0]);
parser.ReadFloat(orientation[1]);
parser.ReadFloat(orientation[2]);
frame.set_root_orientation(orientation);
}
else {
float rx=0, ry=0, rz=0;
if (skeleton.rx_dof(bone)) {
parser.ReadFloat(rx);
}
if (skeleton.ry_dof(bone)) {
parser.ReadFloat(ry);
}
if (skeleton.rz_dof(bone)) {
parser.ReadFloat(rz);
}
frame.set_joint_angles(bone, Vector3(rx, ry, rz));
}
}
frames_.push_back(frame);
}
}
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