Skew Drift

1"use client";
2 
3import type { CSSProperties } from "react";
4 
5import { cx } from "@/components/ui/cellforge-core";
6import { resolveDmxColorTokens } from "@/components/ui/cellforge-core";
7import { useCellForgePhases } from "@/components/ui/cellforge-hooks";
8import { styleOpacity, stylePx } from "@/components/ui/cellforge-core";
9import { remapOpacityToTriplet } from "@/components/ui/cellforge-core";
10import { dmxBloomRootActive, dmxDotBloomParts } from "@/components/ui/cellforge-core";
11import { useCyclePhase } from "@/components/ui/cellforge-hooks";
12import { usePrefersReducedMotion } from "@/components/ui/cellforge-hooks";
13import type { CellForgeCommonProps } from "@/components/ui/cellforge-core";
14 
15export type CellAngle12Props = CellForgeCommonProps;
16 
17const MATRIX_SIZE = 7;
18 
19const BASE_OPACITY = 0.06;
20const MID_OPACITY = 0.34;
21const HIGH_OPACITY = 0.96;
22 
23const TRIANGLE_CELLS = new Set([
24  "1,3",
25  "2,2",
26  "2,4",
27  "3,1",
28  "3,3",
29  "3,5",
30  "4,0",
31  "4,2",
32  "4,4",
33  "4,6"
34]);
35 
36function isWithinTriangleMask(row: number, col: number): boolean {
37  if (row < 0 || row >= MATRIX_SIZE || col < 0 || col >= MATRIX_SIZE) {
38    return false;
39  }
40 
41  return TRIANGLE_CELLS.has(`${row},${col}`);
42}
43 
44function smoothstep01(edge0: number, edge1: number, x: number): number {
45  if (edge1 <= edge0) {
46    return x >= edge1 ? 1 : 0;
47  }
48  const t = Math.max(0, Math.min(1, (x - edge0) / (edge1 - edge0)));
49  return t * t * (3 - 2 * t);
50}
51 
52/**
53 * Anti-diagonal harmonics on `row - col`: bands glide along NE–SW lines through the mask,
54 * opposite oblique motion to loaders keyed on `row + col`.
55 */
56function opacityForCell(row: number, col: number, phase: number): number {
57  const skew = row - col;
58  const t = phase * Math.PI * 2;
59  const u = skew * 0.62 - t * 1.45;
60  const primary = 0.5 + 0.5 * Math.cos(u);
61  const harmonic = 0.5 + 0.5 * Math.cos(u * 2 - 0.55);
62  const pSoft = smoothstep01(0.12, 0.95, primary);
63  const hSoft = smoothstep01(0.38, 0.92, harmonic);
64  const crest = pSoft * pSoft * 0.88 + Math.max(0, hSoft - 0.42) * 0.32;
65  let opacity = BASE_OPACITY + crest * (HIGH_OPACITY - BASE_OPACITY);
66 
67  if (row === 3 && col === 3) {
68    opacity = Math.max(opacity, MID_OPACITY + (crest - 0.22) * 0.4);
69  }
70 
71  return Math.min(HIGH_OPACITY, opacity);
72}
73 
74export function CellAngle12({
75  size = 30,
76  dotSize = 6.5,
77  color = "currentColor",
78  colorPreset,
79  ariaLabel = "Loading",
80  className,
81  muted = false,
82  bloom = false,
83  halo = 0,
84  dotClassName,
85  dotShape = "circle",
86  speed = 1.5,
87// … truncated