// SLAT DEPTH — the picture sliced into sixteen horizontal slats stacked
// back into a whole frame, each slat carrying its own band of the clip
// (`uv_split: "bands_y"`) and swimming in DEPTH on a travelling sine: the
// image stays readable while a wave of parallax rolls through it, and PUMP
// (p1) deepens the swim. Pattern taught here: band windows + a placement
// that reassembles the picture — slat pitch equals the slat's world height,
// row 0 at the top.
{
    name: "Slat Depth"
    engine: "videomesh"
    shape: "grid"
    seed: 14

    instances: 16
    uv_split: "bands_y"
    size: 2.4
    aspect: 0.045
    spread: 0.4
    fly: 0.3
    alt: 0.2

    beat_pulse: 0.35
    p1: "0.3 + 0.5*env(phase)"
    input0: "test"

    dials: [
        {name: "SPIN", bind: "p0", default: 0.0},
        {name: "PUMP", bind: "p1", default: 0.4},
        {name: "EDGE", bind: "p2", default: 0.2}
    ]

    color_bg: #x060810
    color_a: #x3fd8c8
    color_b: #x2a5f9a
    color_c: #xd6f6f0

    fog: 0.03
    glow: 1.0

    stages: [
        {kind: "bloom", threshold: 0.78, strength: 0.5, levels: 2}
    ]

    // THE LOOK LIVES HERE — the stacked-slat placement (y from the band
    // row, z from the travelling wave) and the slat fragment.
    shader: draw.DrawVjFxVideomesh {
        fx_place: fn(id: float, hash: float, t: float) -> vec4 {
            let n = max(self.shape.y, 2.0)
            let h = 0.1944
            let y = ((n - 1.0) * 0.5 - id) * h
            let deep = 0.55 + 1.4 * clamp(self.user.y, 0.0, 2.0)
            let z = sin(t * 0.7 + id * 0.42) * deep
            return vec4(0.0, y, z, 0.0)
        }
        fx_scale: fn(id: float, hash: float, t: float) -> float {
            return 1.0
        }
        fx_color: fn(t: float, attr: vec4, content: vec4, cmix: float) -> vec4 {
            let shade = 0.9 + 0.2 * attr.x
            let lit = content.xyz * (t * shade)
            let gap = self.col_a.xyz * (1.0 - attr.z)
                * (0.15 + self.time_beat.w * 0.5 + clamp(self.user.z, 0.0, 4.0))
            return vec4((lit + gap) * self.fog.y, 1.0)
        }
    }
}