private void ConsumeActorStateFrames(UpperString sprite)
{
UpperString frames = ConsumeString();
int ticks = ConsumeActorFrameTicks();
ActorFrameProperties properties = ConsumeActorFrameKeywordsIfAny();
Optional <ActorActionFunction> actionFunction = ConsumeActionFunctionIfAny();
foreach (char frame in frames)
{
if (!IsValidFrameLetter(frame))
{
throw MakeException($"Invalid actor frame letter: {frame} (ascii ordinal {(int)frame})");
}
ActorFrame actorFrame = new ActorFrame(frameIndex, sprite + frame, ticks, properties, actionFunction);
currentDefinition.States.Frames.Add(actorFrame);
frameIndex++;
}
}
private ActorFrameProperties ConsumeActorFrameKeywordsIfAny()
{
ActorFrameProperties properties = new ActorFrameProperties();
// These can probably come in any order, so we'll need a looping
// dictionary. Apparently we have to watch out for new lines when
// dealing with `fast` and `slow`.
while (true)
{
if (!PeekCurrentText(out string value))
{
throw MakeException($"Ran out of tokens when reading actor frame properties on actor '{currentDefinition.Name}'");
}
UpperString upperKeyword = value;
if (!FramePropertyKeywords.Contains(upperKeyword))
{
break;
}
// Note: In the future we will need to possibly *not* consume
// if its 'fast' or 'slow' and on another line since that may
// be a valid sprite frame. This is why we moved the string
// consumer into each block because some of them might not do
// consumption (whenever we get around to implementing that).
switch (upperKeyword.String)
{
case "BRIGHT":
ConsumeString();
properties.Bright = true;
break;
case "CANRAISE":
ConsumeString();
properties.CanRaise = true;
break;
case "FAST":
// TODO: Make sure it's on the same line (ex: if it's a sprite).
ConsumeString();
properties.Fast = true;
break;
case "LIGHT":
ConsumeString();
Consume('(');
properties.Light = ConsumeString().AsUpper();
Consume(')');
break;
case "NODELAY":
ConsumeString();
properties.NoDelay = true;
break;
case "OFFSET":
ConsumeString();
Consume('(');
int x = ConsumeSignedInteger();
Consume(',');
int y = ConsumeSignedInteger();
Consume(')');
properties.Offset = new Vec2I(x, y);
break;
case "SLOW":
ConsumeString();
// TODO: Make sure it's on the same line (ex: if it's a sprite).
properties.Slow = true;
break;
}
}
return(properties);
}
