public void Compile(string script)
{
lastError = "0 error(s), you're good to go!";
try
{
ParticleEmitterTokenizer tokenizer = new ParticleEmitterTokenizer();
Init();
// parse the character string into tokens.
tokenizer.Tokenize(script);
var tokenIter = tokenizer.TokenVector.GetEnumerator();
ParticleEmitterTokenizer.NextToken(ref tokenIter);
if (tokenizer.TokenVector.Count < 2)
{
throw new Exception("This script is too small to be valid.");
}
// the first three tokens out of the gate should be
// ParticleSystem, followed by a name and version number, then
// an open brace.
if (tokenIter.Current.Type != TokenType.KeywordParticleSystem)
{
throw new Exception("First word must be ParticleSystem");
}
ParticleEmitterTokenizer.NextToken(ref tokenIter);
if (tokenIter.Current.Type != TokenType.Quote)
{
throw new Exception("Must name particle system");
}
name = tokenIter.Current.StringValue.RemoveQuotes();
ParticleEmitterTokenizer.NextToken(ref tokenIter);
if (tokenIter.Current.Type != TokenType.RealNumber)
{
throw new Exception("Must have version number");
}
ParticleEmitterTokenizer.NextToken(ref tokenIter);
if (tokenIter.Current.Type != TokenType.OpenBrace)
{
throw new Exception("Missing opening brace for ParticleSystem block");
}
ProcessParticleSystemBlock(ref tokenIter);
}
catch (Exception ex)
{
lastError = ex.Message;
Init();
Debug.WriteLine(ex);
}
// do misc. processing and calcuations
pos = posRange.GetRandomNumInRange();
}
