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authorKT <tran0563@umn.edu>2021-09-06 19:07:33 -0500
committerKT <tran0563@umn.edu>2021-09-06 19:07:33 -0500
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tree5dd4834daef547cd45fc0b643f44a10b581de0ad /dev/a4-dance/animated_character.h
parentAdded missing images for the A6 worksheet (diff)
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-#ifndef ANIMATED_CHARACTER_H_
-#define ANIMATED_CHARACTER_H_
-
-#include <mingfx.h>
-#include <string>
-#include <map>
-
-#include "motion_clip.h"
-#include "pose.h"
-#include "skeleton.h"
-
-
-/** An AnimatedCharacter combines a hierarchical Skeleton of bones with one or
- more Poses that specify how the bones are currently positioned in space. The
- Poses can be stored in the form of a MotionClip, and this allows for animated
- playback. Example:
- ~~~
- AnimatedCharacter bob;
- MotionClip jump_motion;
-
- void MyGraphicsApp::InitOpenGL() {
- std::vector<std::string> search_path;
- search_path.push_back("./data");
-
- // Load a skeleton for bob
- bob.LoadSkeleton(Platform::FindFile("bob.asf", search_path));
-
- // Load a walking motion and tell bob to start playing it back on repeat
- MotionClip walk1;
- walk1.LoadFromAMC(Platform::FindFile("human_walk.amc", searchPath_), bob.skeleton_ptr());
- bob.Play(walk1);
-
- // Load a jumping motion clip to use later...
- jump_motion.LoadFromAMC(Platform::FindFile("human_jump.amc", searchPath_), bob.skeleton_ptr());
- }
-
- void MyGraphicsApp::UpdateSimulation(double dt) {
- // Advances bob to the next frame of the animation
- bob.AdvanceAnimation(dt);
- }
-
- void MyGraphicsApp::DrawUsingOpenGL() {
- // Draws bob using his current pose (i.e., whatever pose was setup during
- // the last call to bob.AdvanceAnimation()
- bob.Draw(model_matrix, view_matrix, proj_matrix);
- }
-
- void MyGraphicsApp::OnButtonPressed() {
- // Imagine we want bob to jump every time a button is pressed, this overlays
- // a jumping mocap clip on top of bob's current motion. Once the jump is
- // played back once, bob returns to his previous motion.
- bob.OverlayClip(jump_motion, 50);
- }
- ~~~
- */
-class AnimatedCharacter {
-public:
-
- /** Creates an animated character with a skeleton loaded from the specified
- file */
- AnimatedCharacter(const std::string &asf_filename);
-
- /** Creates an animated character with an empty skeleton. The skeleton must
- be loaded with LoadSkeleton() before the character can be animated. */
- AnimatedCharacter();
-
- virtual ~AnimatedCharacter();
-
- /** Loads a skeleton from the specified file. The ASF file format is the
- only format supported.*/
- void LoadSkeleton(const std::string &asf_filename);
-
-
- /** Clears the current motion queue and starts playing the specified motion
- clip immediately. The clip will automatically repeat when finished.*/
- void Play(const MotionClip &motion_clip);
-
- /** Adds the specified motion clip to end of the current play queue. If the
- queue is currently empty, then the motion will start playing immediately.
- If the queue is not empty then the motion will start playing after all the
- previously added clips finish playing.*/
- void Queue(const MotionClip &motion_clip);
-
- /** Removes all motion clips from the current queue and resets the current
- pose to the default pose of the skeleton.*/
- void ClearQueue();
-
-
- /** Assuming the character is currently in the middle of an animation, this
- function briefly interrupts that current motion in order to play a new
- motion clip. Use this to apply new behaviors on command. In a game where
- you press the 'A' button to punch, you could call this function to overlay
- a punching motion clip on top of the current base motion of the character.
- We call this an "overlay" rather than simply "insert" because the function
- also interpolates between the current motion clip and the overlay clip so
- that there is a smooth transition in the motion. You can control how smooth
- the transition is by setting the num_transition_frames parameter. A larger
- number will create a longer, smoother transition. num_transition_frames are
- used both to "fade in" the overlay motion and to "fade it out". If you have
- an overlay_clip that is 300 frames long and num_transition_frames=50, then
- the first 50 frames of the overlay_clip will be blended with the next 50
- frames of the motion clip that the character is currently using. Then, the
- middle 200 frames of the overlay_clip will be played on their own. Then,
- the final 50 frames of the overlay_clip will again be blended with the next
- 50 frames of the character's current motion clip to "fade out" the overlay.
- */
- void OverlayClip(const MotionClip &overlay_clip, int num_transition_frames);
-
-
- /** You must call this function to advance the frame of the current motion
- clip. Pass the elapsed time since the last call to AdvanceAnimation in the
- dt (delta t) argument. The number of frames to advance is determined based
- on the real-world elapsed time, and is determined by the character's frames
- per second (fps). For example, if the character is set to have a fps=120,
- and the dt since the last frame is 1/120 seconds, then the character will
- advance 1 frame. If the fps=120 and the dt=1/60, then the character will
- advance 2 frames, etc..*/
- void AdvanceAnimation(double dt);
-
-
- /** Draws the character using the supplied matrices. If use_absolute_position
- is true, then the character's root position will be set using the absolute
- position in the root transformation matrix for the current pose. If it is
- false, then the relative change in */
- void Draw(const Matrix4 &model_matrix, const Matrix4 &view_matrix, const Matrix4 &proj_matrix,
- bool use_absolute_position=true);
-
-
-
- Skeleton* skeleton_ptr();
-
- void set_fps(int fps);
-
- int fps();
-
-private:
-
- void CalcCurrentPose();
-
- void DrawBoneRecursive(const std::string &bone_name, const Matrix4 &parent_transform,
- const Matrix4 &view_matrix, const Matrix4 &proj_matrix);
-
- // Raw skeleton data
- Skeleton skeleton_;
-
- // Raw character motion data
- std::vector<MotionClip> motion_queue_;
-
- // "frames per second" - we assume all clips in the playlist are played back at the same rate
- int fps_;
-
- // time since we last advanced to the next frame in the clip
- double elapsed_since_last_frame_;
-
- // current frame to display from motion_queue_[0]
- int current_frame_;
-
- // if we are overlaying a clip on top of the main motion, this holds that clip
- MotionClip overlay_clip_;
-
- // current frame to display from overlay_clip_
- int overlay_frame_;
-
- // number of frames used to fade-in and fade-out the overlay clip
- int overlay_transition_frames_;
-
- // cached value of the current pose
- Pose pose_;
-
- // the accumulated relative translations from frame-to-frame, not used when
- // drawing with absolute position turned on.
- Matrix4 accum_translation_matrix_;
-
- // for drawing the character
- QuickShapes quick_shapes_;
-};
-
-
-#endif