This is a BVH Motion Capture Data file viewer written in JavaScript (using WebGL and specifically the three.js library). See a demonstration at: https://fling.seas.upenn.edu/~emretan/cgi-bin/bvhlist.html .

Features:

• Supports any rotation order in the file.
• Supports 3 and 6 channels.
• Can pause, replay or play forward or back frame by frame.
• Can scale the whole world up/down.
• Can scale just the bones up/down.
• Automatically detects if the bone sizes in the BVH file are too little, and scales them up before starting the animation.
• Can change the up vector to +/-X, +/-Y, +/-Z.
• Displays a ghost image of the body every 100 frames, to see the trace of the movement. Can toggle it on or off.
• Automatically sets the up vector of the model before starting the animation depending on the orientation of its bounding box.
• Automatically changes the camera position before starting the animation depending on the up vector.
• Can move the camera around the world.

Past Bugs:

• After replaying multiple times, the animation becomes faster. (Fixed)
• Doesn't currently work if there are more than 3 channels for all joints other than the root. (Fixed)
• Might want to link up scaling to sliders.
• The grid doesn't change orientation when you change the up vector --> might make the interface more usable and friendly. (Fixed)

To Do:

• Frame by frame playing -->Works going forward, need to implement going back frames +
• Set the scene automatically -- detect bounding box and adjust the up vector and scale according to that --> (Fixed)
• Going backwards frame by frame -> very small bug (Fixed)
• starting perspective more user-friendly (Done)
• responsive layout (Done)
• buttons on the side (Done)
• icons for play/pause (Done)
• automatically scale bones (keep track of max bone size, if below certain amount scale bones up) (Done)
• Bone scaling doesn't scale ghosts

Increase Performance:

• Trace toggle button could be more efficient --> (Done)

New To Do:

Fix weird orientations (Done) Fix fast replay issue (Done) 6 channel BVH file issue (Done) Switch to updated three.js version (Done) Can play back and forth with 6 channels (Done) Switched to trackballcontrols (Done) Switched materials (Done) Switched from vertices to vectors (Done) opacity of materials (Done) limb orientation (Done)