Something went wrong. Try again.
Monorepo for Aesthetic.Computer aesthetic.computer
Something went wrong. Try again.
2.3 kB · 35 lines
JavaScript
at main
123456789101112131415161718192021222324252627282930313233343536// Lower the audited arithmetic plan into a shader/C function. Deliberately// narrow: the ray kernel needs finite constants, inputs, +, -, and * only.// WGSL is an explicit f32 profile, not a claim of numeric-v1 f64 equivalence.import { runNumeric } from "../../system/public/aesthetic.computer/lib/kidlisp-plan.mjs";import { numericOperationById } from "../../system/public/aesthetic.computer/lib/kidlisp-ops.mjs";
export function emitRayPlan(plan, target) { if (!["wgsl", "c"].includes(target)) throw new TypeError("Unknown ray plan target"); if (plan?.bindings?.length !== 7) throw new TypeError("Expected seven ray input slots"); if (!Array.isArray(plan.code) || plan.code.length > 512) throw new TypeError("Ray profile supports at most 512 instructions"); runNumeric(plan, Array(7).fill(0)); const stack = [], lines = []; const literal = n => { if (n === "-0") return "-0.0"; if (typeof n !== "number" || !Number.isFinite(n) || (target === "wgsl" && !Number.isFinite(Math.fround(n)))) throw new TypeError("Ray profile requires finite constants"); const text = String(n); return Object.is(n, -0) ? "-0.0" : /[.eE]/.test(text) ? text : `${text}.0`; }; for (const [i, op] of plan.code.entries()) { let expression; if (op.op === "const") expression = literal(op.value); else if (op.op === "input") expression = `p${op.slot}`; else { const args = stack.splice(stack.length - op.count, op.count); const name = numericOperationById(op.id).name; if (name === "+" || name === "*") expression = args.reduce((a, b) => `(${a} ${name} ${b})`, name === "+" ? "0.0" : "1.0"); else if (name === "-") expression = !args.length ? "0.0" : args.length === 1 ? `(-${args[0]})` : args.slice(1).reduce((a, b) => `(${a} - ${b})`, args[0]); else throw new TypeError(`Ray profile does not support ${name}`); } lines.push(target === "wgsl" ? `let v${i}: f32 = ${expression};` : `double v${i} = ${expression};`); stack.push(`v${i}`); } const parameters = Array.from({ length: 7 }, (_, i) => target === "wgsl" ? `p${i}: f32` : `double p${i}`).join(", "); return `${target === "wgsl" ? "fn rayKernel" : "static double rayKernel"}(${parameters})${target === "wgsl" ? " -> f32" : ""} {\n${lines.join("\n")}\nreturn ${stack[0]};\n}`;}