// HEX FIELD — a column-offset cell lattice, the N-gon family's six-sided
// member: cells open outward from the centre in a brick-like weave
// rotated 90 degrees from Honeycomb's row offset.
{
    name: "Hex Field"
    engine: "transition"
    p1: 0.5
    dials: [
        {name: "SOFT", bind: "p0", default: 0.1},
        {name: "CELLS", bind: "p1", default: 0.5},
        {name: "DIP", bind: "p2", default: 0.0}
    ]
    shader: draw.DrawVjFxDuo {
        trans: fn(uv: vec2, t: float) -> vec4 {
            let n = 5.0 + floor(self.user.y * 7.0)
            let cols = n * 0.87
            let col = floor(uv.x * cols)
            let offset = modf(col, 2.0) * 0.5
            let row = floor(uv.y * n - offset)
            let ccx = (col + 0.5) / cols
            let ccy = (row + offset + 0.5) / n
            let d = vec2((ccx - 0.5) * self.aspect(), ccy - 0.5)
            let field = length(d)
            let rmax = 0.5 * sqrt(self.aspect() * self.aspect() + 1.0)
            let soft = 0.03 + self.user.x * 0.12
            let edge = t * (rmax + 2.0 * soft) - soft
            let inside = smoothstep(edge + soft, edge - soft, field)
            let c = self.deck_a(uv).mix(self.deck_b(uv), inside)
            let dim = 1.0 - 4.0 * clamp(t, 0.0, 1.0) * (1.0 - clamp(t, 0.0, 1.0)) * self.user.z * 0.9
            return vec4(c.xyz * dim, 1.0)
        }
    }
}