+{
+ add_keyframe(t, kf, 1.0f, 1.0f);
+}
+
+void Animation::add_keyframe(const Time::TimeDelta &t, const KeyFrame &kf, float slope)
+{
+ add_keyframe(t, kf, slope, slope);
+}
+
+void Animation::add_keyframe(const Time::TimeDelta &t, const KeyFrame &kf, float ss, float es)