// BLIMP — a fat video airship cruising a slow bounded figure through the
// frame: a horizontal capsule whose hull wraps the clip end to end, drifting
// on three detuned sines with a gentle nose wobble, the beat breathing a
// little extra light along the belly. Pattern taught here: a fixed axis
// spin (quarter-turn about z lays the capsule flat) composed with a wobble,
// and a drift path that is three sines — bounded forever.
{
    name: "Blimp"
    engine: "videomesh"
    shape: "capsule"
    seed: 15

    detail: 32
    size: 2.3
    aspect: 1.9
    fly: 0.6

    beat_pulse: 0.35
    input0: "test"

    color_bg: #x05070f
    color_a: #x88b0e0
    color_b: #x304a80
    color_c: #xf0f6ff

    fog: 0.02
    glow: 1.0

    stages: [
        {kind: "bloom", threshold: 0.75, strength: 0.6, levels: 2}
    ]

    // THE LOOK LIVES HERE — the drifting hull, clip wrapped around it.
    shader: draw.DrawVjFxVideomesh {
        fx_axis: fn(id: float, hash: float) -> vec3 {
            return vec3(0.0, 0.0, 1.0)
        }
        fx_place: fn(id: float, hash: float, t: float) -> vec4 {
            let x = 2.3 * sin(t * 0.19)
            let y = 0.55 * sin(t * 0.31)
            let z = 0.8 * sin(t * 0.11)
            return vec4(x, y, z, 1.5707963 + 0.08 * sin(t * 0.45))
        }
        fx_color: fn(t: float, attr: vec4, content: vec4, cmix: float) -> vec4 {
            let lit = content.xyz * t
            let belly = self.col_c.xyz * (1.0 - attr.z)
                * (0.2 + self.time_beat.w * 0.7 + clamp(self.user.z, 0.0, 4.0))
            return vec4((lit + belly) * self.fog.y, 1.0)
        }
    }
}