// OCTA RING — ten small video octahedra strung on a slow carousel, every
// stone tumbling on its own hashed axis and bobbing on a detuned sine, so
// the ring glitters with staggered flashes of the clip. Pattern taught
// here: leaving fx_axis at the engine default (a hashed per-instance axis)
// while the doc owns only the carousel placement.
{
    name: "Octa Ring"
    engine: "videomesh"
    shape: "octahedron"
    seed: 17

    instances: 10
    size: 1.15
    spread: 3.6
    fly: 0.8

    beat_pulse: 0.4
    input0: "test"

    color_bg: #x060610
    color_a: #xf0a840
    color_b: #x40e8c0
    color_c: #xfff0d8

    fog: 0.02
    glow: 1.0

    stages: [
        {kind: "bloom", threshold: 0.7, strength: 0.8, levels: 2}
    ]

    // THE LOOK LIVES HERE — carousel + tumble placement, facet fragment.
    shader: draw.DrawVjFxVideomesh {
        fx_place: fn(id: float, hash: float, t: float) -> vec4 {
            let a = (id / 10.0 + t * 0.025) * 6.2831853
            let r = self.shape.w
            let y = 0.35 * sin(t * 0.5 + id)
            let spin = t * (0.4 + hash * 0.7) * (1.0 + clamp(self.user.x, 0.0, 4.0))
            return vec4(sin(a) * r, y, cos(a) * r, spin)
        }
        fx_color: fn(t: float, attr: vec4, content: vec4, cmix: float) -> vec4 {
            let tint = self.col_a.xyz.mix(self.col_b.xyz, attr.x)
            let lit = content.xyz * t + tint * 0.14
            let rim = self.col_c.xyz * (1.0 - attr.z)
                * (0.4 + self.time_beat.w * 1.0 + clamp(self.user.z, 0.0, 4.0))
            return vec4((lit + rim) * self.fog.y, 1.0)
        }
    }
}