L25 — Idle & walk animation + export

Goal

Create looping idle and walk actions (or use the reference character) and play them in Tiny3D via named animations.

Concepts

Term	Meaning
Action	A clip (idle, walk) in Blender’s Dope Sheet / Action Editor
Loop	First and last frames match pose for seamless cycle
In-place walk	Character walks on a treadmill; game code moves root

Authoring tips

1. Idle: subtle breathing/sway, 20–40 frames.
2. Walk: contact → passing → contact; even frame count helps.
3. Name actions clearly: Idle, Walk (reference uses Snake_Idle, Snake_Walk).
4. Export glTF with animations enabled + custom properties if Fast64.

Runtime (preview of Module 4)

T3DSkeleton skel = t3d_skeleton_create_buffered(model, FB_COUNT);
T3DAnim idle = t3d_anim_create(model, "Snake_Idle");
t3d_anim_attach(&idle, &skel);
t3d_anim_update(&idle, dt);
t3d_skeleton_update(&skel);
t3d_skeleton_use(&skel);          /* required when bufferCount > 1 */
t3d_model_draw_skinned(model, &skel);

Asset lab: select player_anim, press A to blend toward walk.

Exercises

1. In the lab, switch idle/walk.
2. Open the reference .blend if provided in Tiny3D examples and inspect actions.
3. (Stretch) Make a 2-bone lamp with a bob idle.

Lesson code

Module 3 is Blender-first — there is no per-lesson C ROM for L17–L25.

Runnable code that loads the course meshes lives in the Module 3 asset lab checkpoint (lessons/m3-asset-lab/).

Next

Checkpoint — Asset lab.