X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fanimation.cpp;h=b1d639e7c957dbffb3ce73f43256be5e0ba52c8a;hb=fa5b232a16e11d7950e80764497f0167ec9e3b41;hp=eb22ab29f0462fa5c686b2542b9b21ba155f5a6e;hpb=4c5ba8f7d3bc755d6256cb6bf75907a1b10fc290;p=libs%2Fgl.git diff --git a/source/animation.cpp b/source/animation.cpp index eb22ab29..b1d639e7 100644 --- a/source/animation.cpp +++ b/source/animation.cpp @@ -2,25 +2,36 @@ #include #include #include "animation.h" +#include "armature.h" +#include "error.h" #include "keyframe.h" +#include "pose.h" using namespace std; -#include - namespace Msp { namespace GL { Animation::Animation(): + armature(0), looping(false) { } +// Avoid synthesizing ~RefPtr in files including animation.h +Animation::~Animation() +{ } + +void Animation::set_armature(const Armature &a) +{ + armature = &a; +} + void Animation::add_keyframe(const Time::TimeDelta &t, const KeyFrame &kf) { if(!keyframes.empty() && ttime; + tkf.prepare(); +} + + +Animation::AxisInterpolation::AxisInterpolation(): + slope(0), + scale(0) +{ } - const double *m1_data = tkf.prev->keyframe->get_matrix().data(); - const double *m2_data = tkf.keyframe->get_matrix().data(); +Animation::AxisInterpolation::AxisInterpolation(const float *axis1, const float *axis2) +{ + // Compute a normalized vector halfway between the two endpoints + float half[3]; + float a1_len = 0; + float h_len = 0; for(unsigned i=0; i<3; ++i) { - const double *m1_col = m1_data+i*4; - const double *m2_col = m2_data+i*4; - - // Compute a normalized vector halfway between the two endpoints - double half[3]; - double len = 0; - for(unsigned j=0; j<3; ++j) - { - half[j] = (m1_col[j]+m2_col[j])/2; - len += half[j]*half[j]; - } - len = sqrt(len); - for(unsigned j=0; j<3; ++j) - half[j] /= len; - - // Compute correction factors for smooth interpolation - double cos_half = m1_col[0]*half[0]+m1_col[1]*half[1]+m1_col[2]*half[2]; - double angle = acos(cos_half); - tkf.axes[i].slope = (angle ? angle/tan(angle) : 1); - tkf.axes[i].scale = cos_half; + half[i] = (axis1[i]+axis2[i])/2; + a1_len += axis1[i]*axis1[i]; + h_len += half[i]*half[i]; } + + // Compute correction factors for smooth interpolation + float cos_half = (axis1[0]*half[0]+axis1[1]*half[1]+axis1[2]*half[2])/sqrt(a1_len*h_len); + float angle = acos(cos_half); + slope = (angle ? angle/tan(angle) : 1); + scale = cos_half; } -Matrix Animation::compute_matrix(const TimedKeyFrame &tkf, const Time::TimeDelta &dt) const + +Animation::MatrixInterpolation::MatrixInterpolation(): + matrix1(0), + matrix2(0) +{ } + +Animation::MatrixInterpolation::MatrixInterpolation(const Matrix &m1, const Matrix &m2): + matrix1(&m1), + matrix2(&m2) { - if(!dt) - return tkf.keyframe->get_matrix(); - if(!tkf.prev) - throw invalid_argument("Animation::compute_matrix"); - const TimedKeyFrame &prev = *tkf.prev; + const float *m1_data = matrix1->data(); + const float *m2_data = matrix2->data(); + for(unsigned i=0; i<3; ++i) + axes[i] = AxisInterpolation(m1_data+i*4, m2_data+i*4); +} - float t = dt/tkf.delta_t; +Matrix Animation::MatrixInterpolation::get(float t) const +{ float u = t*2.0f-1.0f; - double matrix[16]; - const double *m1_data = prev.keyframe->get_matrix().data(); - const double *m2_data = tkf.keyframe->get_matrix().data(); + float matrix[16]; for(unsigned i=0; i<4; ++i) { - const double *m1_col = m1_data+i*4; - const double *m2_col = m2_data+i*4; - double *out_col = matrix+i*4; + const float *m1_col = matrix1->data()+i*4; + const float *m2_col = matrix2->data()+i*4; + float *out_col = matrix+i*4; if(i<3) { @@ -91,13 +114,13 @@ Matrix Animation::compute_matrix(const TimedKeyFrame &tkf, const Time::TimeDelta around the halfway point and computing its tangent. This is approximated by a third degree polynomial, scaled so that the result will be in the range [-1, 1]. */ - float w = (tkf.axes[i].slope+(1-tkf.axes[i].slope)*u*u)*u*0.5f+0.5f; + float w = (axes[i].slope+(1-axes[i].slope)*u*u)*u*0.5f+0.5f; /* The interpolate vectors will also be shorter than unit length. At the halfway point the length will be equal to the cosine of half the angle, which was computed earlier. Use a second degree polynomial to approximate. */ - float n = (tkf.axes[i].scale+(1-tkf.axes[i].scale)*u*u); + float n = (axes[i].scale+(1-axes[i].scale)*u*u); for(unsigned j=0; j<3; ++j) out_col[j] = ((1-w)*m1_col[j]+w*m2_col[j])/n; @@ -118,11 +141,31 @@ Matrix Animation::compute_matrix(const TimedKeyFrame &tkf, const Time::TimeDelta } -Animation::AxisInterpolation::AxisInterpolation(): - slope(0), - scale(0) +Animation::TimedKeyFrame::TimedKeyFrame(const Animation &a): + animation(a), + prev(0) { } +void Animation::TimedKeyFrame::prepare() +{ + delta_t = time-prev->time; + matrix = MatrixInterpolation(prev->keyframe->get_matrix(), keyframe->get_matrix()); + if(animation.armature) + { + unsigned max_index = animation.armature->get_max_link_index(); + pose_matrices.resize(max_index+1); + const Pose *pose1 = prev->keyframe->get_pose(); + const Pose *pose2 = keyframe->get_pose(); + static Matrix identity; + for(unsigned i=0; i<=max_index; ++i) + { + const Matrix &matrix1 = (pose1 ? pose1->get_link_matrix(i) : identity); + const Matrix &matrix2 = (pose2 ? pose2->get_link_matrix(i) : identity); + pose_matrices[i] = MatrixInterpolation(matrix1, matrix2); + } + } +} + Animation::Iterator::Iterator(const Animation &a): animation(a), @@ -158,7 +201,34 @@ Animation::Iterator &Animation::Iterator::operator+=(const Time::TimeDelta &t) Matrix Animation::Iterator::get_matrix() const { - return animation.compute_matrix(*iter, time_since_keyframe); + if(!iter->prev) + return iter->keyframe->get_matrix(); + + return iter->matrix.get(time_since_keyframe/iter->delta_t); +} + +Matrix Animation::Iterator::get_pose_matrix(unsigned link) const +{ + if(!animation.armature) + throw invalid_operation("Animation::Iterator::get_pose_matrix"); + if(link>animation.armature->get_max_link_index()) + throw out_of_range("Animation::Iterator::get_pose_matrix"); + + if(!iter->prev) + { + if(const Pose *pose = iter->keyframe->get_pose()) + return pose->get_link_matrix(link); + else + return Matrix(); + } + + // We must redo the base point correction since interpolation throws if off + // XXX This should probably be done on local matrices + Matrix result = iter->pose_matrices[link].get(time_since_keyframe/iter->delta_t); + const Vector3 &base = animation.armature->get_link(link).get_base(); + Vector3 new_base = result*base; + result = Matrix::translation(base-new_base)*result; + return result; } @@ -176,6 +246,7 @@ Animation::Loader::Loader(Animation &a, Collection &c): void Animation::Loader::init() { + add("armature", &Animation::armature); add("interval", &Loader::interval); add("keyframe", &Loader::keyframe); add("keyframe", &Loader::keyframe_inline); @@ -190,9 +261,12 @@ void Animation::Loader::keyframe(const string &n) void Animation::Loader::keyframe_inline() { RefPtr kf = new KeyFrame; - load_sub(*kf); + if(coll) + load_sub(*kf, get_collection()); + else + load_sub(*kf); - TimedKeyFrame tkf; + TimedKeyFrame tkf(obj); tkf.time = current_time; tkf.keyframe = kf; obj.prepare_keyframe(tkf);