// SPIN CUBE — the live video wrapped onto one big, slowly tumbling cube:
// every face plays the clip, the silhouette drifts on a tilted axis and the
// face edges flash on the beat. Pattern taught here: the videomesh engine's
// placement hooks — fx_axis pins the tumble axis, fx_place composes a steady
// spin with a slow breathing wobble (both pure functions of time), and the
// engine's orbit camera does the rest.
{
    name: "Spin Cube"
    engine: "videomesh"
    shape: "box"
    seed: 3

    size: 2.6
    fly: 0.9
    spin: 1.0

    beat_pulse: 0.45
    input0: "test"

    color_bg: #x05070f
    color_a: #x40c8f0
    color_b: #x9040f0
    color_c: #xd8ecff

    fog: 0.0
    glow: 1.0

    stages: [
        {kind: "bloom", threshold: 0.72, strength: 0.7, levels: 2}
    ]

    // THE LOOK LIVES HERE. This block is not a reference to the
    // engine's shader — it IS the choreography and pixel math this
    // effect runs. Rewrite it and the effect looks different; the
    // geometry, the beat and the content coupling keep working,
    // because the block SUBCLASSES the engine shader.
    // Inputs: fx_color t = light drive, attr = (hash, face, edge, id).
    // Signals: self.time_beat (time, beat, phase, pulse),
    // self.sig (bar, bpm, energy, dt), self.user (p0..p3),
    // self.col_a/b/c/bg, self.fog (density, glow, content, -).
    shader: draw.DrawVjFxVideomesh {
        fx_axis: fn(id: float, hash: float) -> vec3 {
            return vec3(0.45, 1.0, 0.3)
        }
        fx_place: fn(id: float, hash: float, t: float) -> vec4 {
            let rate = 0.5 * (1.0 + clamp(self.user.x, 0.0, 4.0))
            return vec4(0.0, 0.0, 0.0, t * rate + 0.6 * sin(t * 0.23))
        }
        fx_color: fn(t: float, attr: vec4, content: vec4, cmix: float) -> vec4 {
            let lit = content.xyz * (t * (0.5 + 0.5 * attr.z))
            let rim = self.col_c.xyz * (1.0 - attr.z)
                * (0.3 + self.time_beat.w * 1.2 + clamp(self.user.z, 0.0, 4.0))
            return vec4((lit + rim) * self.fog.y, 1.0)
        }
    }
}