Implicit Cad

interface:
  display_name: "Implicit CAD"
  short_description: "Write shader-native implicit CAD files."
  default_prompt: "Use $implicit-cad to create browser-rendered implicit CAD `.implicit.js` files with GLSL SDF primitives and snapshots."


MIT License

Copyright (c) 2026 earthtojake and Gradient Control Laboratories

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.


#!/usr/bin/env node
import { spawnSync } from "node:child_process";
import fs from "node:fs";
import path from "node:path";
import { fileURLToPath } from "node:url";

const scriptsDir = path.dirname(fileURLToPath(import.meta.url));
const packageCli = path.join(scriptsDir, "packages", "implicitjs", "scripts", "export.mjs");

if (!fs.existsSync(packageCli)) {
  process.stderr.write(
    `Missing implicitjs export CLI at ${packageCli}. Restore the development symlink layout or rebuild the production skill bundle.\n`
  );
  process.exit(1);
}

const completed = spawnSync(process.execPath, [packageCli, ...process.argv.slice(2)], {
  cwd: process.cwd(),
  stdio: "inherit",
});

process.exitCode = completed.status ?? 1;


import { IMPLICIT_CAD_SCHEMA } from "../packages/implicitjs/src/lib/implicitCad/schema.js";

export const SCHEMA = IMPLICIT_CAD_SCHEMA;
export const PI = Math.PI;
export const TWO_PI = Math.PI * 2;
export const SQRT2 = Math.sqrt(2);
export const SQRT3 = Math.sqrt(3);

function numberLiteral(value) {
  const numeric = Number(value);
  if (!Number.isFinite(numeric)) {
    throw new Error(`Expected finite number, got ${value}`);
  }
  if (Object.is(numeric, -0)) {
    return "0.0";
  }
  return Number.isInteger(numeric) ? `${numeric}.0` : String(numeric);
}

function componentList(value, dimension) {
  if (typeof value === "number") {
    return Array.from({ length: dimension }, () => numberLiteral(value));
  }
  if (!Array.isArray(value) && !ArrayBuffer.isView(value)) {
    throw new Error(`Expected vec${dimension} array or scalar`);
  }
  return Array.from({ length: dimension }, (_, index) => numberLiteral(value[index] ?? 0));
}

export function vec2(value, y = null) {
  const components = y === null ? componentList(value, 2) : [numberLiteral(value), numberLiteral(y)];
  return `vec2(${components.join(", ")})`;
}

export function vec3(value, y = null, z = null) {
  const components = y === null && z === null
    ? componentList(value, 3)
    : [numberLiteral(value), numberLiteral(y), numberLiteral(z)];
  return `vec3(${components.join(", ")})`;
}

export function expr(value) {
  if (value && typeof value === "object" && typeof value.expr === "string") {
    return value.expr;
  }
  if (typeof value === "number") {
    return numberLiteral(value);
  }
  return String(value);
}

export function glsl(strings, ...values) {
  return strings.reduce((result, part, index) => (
    `${result}${part}${index < values.length ? expr(values[index]) : ""}`
  ), "");
}

function reduceCall(values, callName, radius = null) {
  const parts = values.map(expr);
  if (parts.length === 0) {
    throw new Error(`${c