| 66 | } |
| 67 | |
| 68 | function validate(name: string, desc: unknown): MaterialJson { |
| 69 | if (typeof desc !== 'object' || desc === null) { |
| 70 | throw new Error(`${name}: expected an object, got ${typeof desc}`); |
| 71 | } |
| 72 | const d = desc as Record<string, unknown>; |
| 73 | if (typeof d.shader !== 'string' || d.shader.length === 0) { |
| 74 | throw new Error(`${name}: missing or empty "shader" field`); |
| 75 | } |
| 76 | if (typeof d.bucket !== 'string' || !VALID_BUCKETS.includes(d.bucket as Bucket)) { |
| 77 | throw new Error( |
| 78 | `${name}: "bucket" must be one of ${VALID_BUCKETS.join(', ')} (got ${JSON.stringify(d.bucket)})`, |
| 79 | ); |
| 80 | } |
| 81 | if (d.params !== undefined) { |
| 82 | if (!Array.isArray(d.params)) { |
| 83 | throw new Error(`${name}: "params" must be an array of numbers if present`); |
| 84 | } |
| 85 | for (const v of d.params) { |
| 86 | if (typeof v !== 'number' || Number.isNaN(v)) { |
| 87 | throw new Error(`${name}: "params" must contain only finite numbers`); |
| 88 | } |
| 89 | } |
| 90 | if (d.params.length > 64) { |
| 91 | throw new Error( |
| 92 | `${name}: "params" length ${d.params.length} exceeds the 64-float (256-byte) ABI cap`, |
| 93 | ); |
| 94 | } |
| 95 | } |
| 96 | return { |
| 97 | shader: d.shader, |
| 98 | bucket: d.bucket as Bucket, |
| 99 | params: d.params as number[] | undefined, |
| 100 | }; |
| 101 | } |
| 102 | |
| 103 | function emitParams(params: number[] | undefined): string { |
| 104 | if (!params || params.length === 0) return ''; |