/// <summary>
/// Load spritesheet properties from config asset.
/// Note: this will replace all existing settings.
/// </summary>
/// <param name="config">Config file to load from.</param>
/// <remarks>Config must contain the following section:
/// [general]
/// - sprites_count = how many sprites there are in this spritesheet, format is: "x,y".
/// - animations = list of comma-separated animations found in this spritesheet config.
/// for every animation listed here, you need to also include a section with animation data.
/// check out 'SpriteAnimation' constructor for more info.
///
/// [bookmarks]
/// - optional, contains a list of values where every key is a bookmark identifier and value is sprite index "x,y".
/// later, you can use this to set sprites from spritesheet by names. for example: sheet.SetSprite(sprite, "item_sword");
///
/// For more info, check out demo_spritesheet.ini in test assets folder.
/// </remarks>
public void LoadFromConfig(ConfigAsset config)
{
// load general settings
SpritesCount = config.GetPointI("general", "sprites_count", PointI.Zero);
// load bookmarks
var bookmarks = config.Keys("bookmarks");
foreach (var book in bookmarks)
{
var value = config.GetPointI("bookmarks", book, PointI.Zero);
_bookmarks.Add(book, value);
}
// load animations
var animations = config.GetStr("general", "animations", "").Split(',');
foreach (var anim in animations)
{
var animationName = anim.Trim();
var spriteAnimation = new SpriteAnimation(animationName, config);
_animations.Add(animationName, spriteAnimation);
}
}
/// <summary>
/// Load animation from config asset, based on animation identifier.
/// </summary>
/// <param name="identifier">Animation identifier.</param>
/// <param name="config">Config asset to load from.</param>
/// <remarks>Config must contain a section called 'anim_xxx', where xxx is this animation's unique identifier.
/// Under this section, we should have the following keys:
/// - repeats = true / false - does this animation loops, or remain stuck on last step after done?
/// - steps_count = how many steps we have in this animation.
/// - setp_x_duration [x is step index] = duration, in seconds, of this animation step.
/// - setp_x_source [x is step index] = index in spritesheet file, format is: "x,y".
/// - step_x_tag [x is step index] = optional tag to attach to this step.
/// For more info, check out demo_spritesheet.ini in test assets folder.</remarks>
public SpriteAnimation(string identifier, ConfigAsset config)
{
// set identifier
Identifier = identifier;
// get general stuff
string section = "anim_" + identifier;
Repeats = config.GetBool(section, "repeats");
int steps = config.GetInt(section, "steps_count", -1);
// sanity
if (steps < 0)
{
throw new Exception($"Missing animation {identifier} section in config file, or missing 'steps_count' key!");
}
// load all steps
for (int i = 0; i < steps; ++i)
{
string prefix = "step_" + i.ToString();
// read duration
float duration = config.GetFloat(section, prefix + "_duration", -100f);
if (duration == -100f)
{
throw new FormatException($"Missing or invalid duration value for step {i} in animation '{identifier}'.");
}
// read source index
PointI index = config.GetPointI(section, prefix + "_source", new PointI(-100, -100));
if (index.X == -100f)
{
throw new FormatException($"Missing or invalid source value for step {i} in animation '{identifier}'.");
}
// read optional tag and add step
string tag = config.GetStr(section, prefix + "_tag", null);
AddStep(new SpriteAnimationStep()
{
Duration = duration, Index = index, Tag = tag
});
}
}