parseKey static method

(String, String?, int?) parseKey(String key)

Parse a uniform key into (structName, memberName, arrayIndex).

Examples:

• 'VertexInfo.model' becomes ('VertexInfo', 'model', null)
• 'Lights.positions[0]' becomes ('Lights', 'positions', 0)
• 'albedoTexture' becomes ('albedoTexture', null, null)

Implementation

static (String, String?, int?) parseKey(String key) {
  final match = _keyMatches.putIfAbsent(key, () {
    final match = _keyRegex.firstMatch(key);
    if (match == null) {
      throw StateError('Invalid uniform key: "$key"');
    }
    return match;
  });

  final struct = match.group(1)!;
  final member = match.group(2);
  final index = match.group(3);
  return (struct, member, index != null ? int.parse(index) : null);
}