// TILE — the frame repeats across a grid, zoomed and scrolling; a video
// wall built from one source.
{
    name: "Tile"
    engine: "screen"
    input0: "test"

    p0: 0.5  p1: 0.5  p2: 0.5
    dials: [
        {name: "COUNT", bind: "p0", default: 0.5},
        {name: "ZOOM", bind: "p1", default: 0.5},
        {name: "SHIFT", bind: "p2", default: 0.5}
    ]

    stages: [
        {kind: "bloom", threshold: 0.6, strength: 1.05, levels: 2}
    ]

    shader: draw.DrawVjFxScreen {
        fx_color: fn(uv: vec2, content: vec4, cmix: float) -> vec4 {
            let reps = mix(1.0, 7.0, self.user.x) + 1.0
            let zoom = 0.2 + 1.6 * self.user.y
            let shift = modf(self.time_beat.x * 0.06 * (0.2 + 1.6 * self.user.z), 5.0)
            let w = fract(uv * reps / zoom + vec2(shift, shift * 0.6))
            let tex = self.tex0.sample_as_bgra(w)
            return vec4(tex.xyz, 1.0)
        }
    }
}