// SPHERE RELIEF — the clip EXTRUDED off a revolving globe: every vertex of
// a dense sphere is pushed out along its normal by the video's brightness
// there, so bright passages grow spiky mountain ranges that roll around the
// ball while dark passages stay smooth sea. PUMP (p1) gains the relief —
// bind it to the music and the globe breathes terrain. Pattern taught here:
// the engine's `relief:` key, a vertex-stage luma displacement.
{
    name: "Sphere Relief"
    engine: "videomesh"
    shape: "sphere"
    seed: 10

    detail: 48
    size: 3.2
    relief: 0.4
    fly: 0.6

    beat_pulse: 0.45
    p1: "0.2 + 1.4*energy"
    input0: "test"

    dials: [
        {name: "SPIN", bind: "p0", default: 0.0},
        {name: "PUMP", bind: "p1", default: 0.3},
        {name: "EDGE", bind: "p2", default: 0.2}
    ]

    color_bg: #x040810
    color_a: #x40e8c0
    color_b: #x1a4a7a
    color_c: #xe0fff4

    fog: 0.02
    glow: 1.0

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

    // THE LOOK LIVES HERE — the terrain fragment: the clip shaded by its
    // own luma, valleys sunk dark, peaks lifted toward color_c.
    shader: draw.DrawVjFxVideomesh {
        fx_axis: fn(id: float, hash: float) -> vec3 {
            return vec3(0.1, 1.0, 0.05)
        }
        fx_place: fn(id: float, hash: float, t: float) -> vec4 {
            return vec4(0.0, 0.0, 0.0, t * 0.4 * (1.0 + clamp(self.user.x, 0.0, 4.0)))
        }
        fx_color: fn(t: float, attr: vec4, content: vec4, cmix: float) -> vec4 {
            let l = dot(content.xyz, vec3(0.299, 0.587, 0.114))
            let lit = content.xyz * (t * (0.35 + 0.95 * l))
            let peak = self.col_c.xyz * smoothstep(0.72, 1.0, l)
                * (0.25 + self.time_beat.w * 0.9)
            return vec4((lit + peak) * self.fog.y, 1.0)
        }
    }
}