/// Interpolate animation frame from two other frames.
///
/// \param src Source frame (earlier).
/// \param dst Destination frame (later).
/// \param current_time Animation time.
void interpolateFrom(const AnimationFrame &lhs, const AnimationFrame &rhs, float current_time)
{
unsigned bone_count = lhs.getBoneCount();
#if defined(USE_LD)
if(rhs.getBoneCount() != bone_count)
{
std::ostringstream sstr;
sstr << "cannot interpolate between frames of size " << bone_count << " and " << rhs.getBoneCount();
BOOST_THROW_EXCEPTION(std::runtime_error(sstr.str()));
}
#endif
//std::cout << "resizing bones or not? " << m_bones.size() << " vs " << bone_count << std::endl;
m_time = current_time;
m_bones.resize(bone_count);
for(unsigned ii = 0; (bone_count > ii); ++ii)
{
const BoneState &ll = lhs.getBoneState(ii);
const BoneState &rr = rhs.getBoneState(ii);
float ltime = lhs.getTime();
float rtime = rhs.getTime();
float mix_time = (current_time - ltime) / (rtime - ltime);
vec3 mix_pos = mix(ll.getPosition(), rr.getPosition(), mix_time);
quat mix_rot = mix(ll.getRotation(), rr.getRotation(), mix_time);
//std::cout << "mix time: " << mix_time << ": " << mix_pos << " ; " << mix_rot << std::endl;
m_bones[ii] = BoneState(mix_pos, mix_rot);
}
}
void Animation::draw(ResourceLoader *resLoader, SDL_Surface *screen, AnimationInstance *ai, float x, float y)
{
AnimationFrame *currFrame = NULL;
float cumulativeTime = 0;
float timeThisFrame = 0;
float timeInSeconds = ai->getComplete()*totalTime;
for (int i = 0; i < numFrames; ++i)
{
if (timeInSeconds >= cumulativeTime)
{
timeThisFrame = timeInSeconds-cumulativeTime;
currFrame = &(frames[i]);
}else
{
break;
}
cumulativeTime += currFrame->getTime();
}
if (currFrame != NULL)
{
for (int i = 0; i < currFrame->getEffectSize(); ++i)
currFrame->getEffect(i)->setTime(timeThisFrame);
for (int i = 0; i < currFrame->getNumImages(); ++i)
{
Pos2 *offset = currFrame->getOffset(i);
resLoader->draw_image(
currFrame->getImage(i),
screen, x+offset->getX(),
y+offset->getY(), currFrame->getEffects(), currFrame->getEffectSize());
}
}
//SDL_BlitSurface( resLoader->get_image(currFrame->image_type), src_rect, screen, dst_rect );
}
/// Duplicate from given frame.
///
/// \param op Frame to duplicate.
void duplicate(const AnimationFrame &op)
{
unsigned bone_count = op.getBoneCount();
m_time = op.getTime();
m_bones.resize(bone_count);
for(unsigned ii = 0; (bone_count > ii); ++ii)
{
m_bones[ii] = op.getBoneState(ii);
}
}