/// <summary>
/// Function to convert a JSON formatted string into a <see cref="IGorgonAnimation"/> object.
/// </summary>
/// <param name="renderer">The renderer for the animation.</param>
/// <param name="json">The JSON string containing the animation data.</param>
/// <returns>A new <see cref="IGorgonAnimation"/>.</returns>
/// <exception cref="ArgumentNullException">Thrown when the <paramref name="renderer"/>, or the <paramref name="json"/> parameter is <b>null</b>.</exception>
/// <exception cref="ArgumentEmptyException">Thrown when the <paramref name="json"/> parameter is empty.</exception>
/// <exception cref="GorgonException">Thrown if the JSON string does not contain animation data, or there is a version mismatch.</exception>
public IGorgonAnimation FromJson(Gorgon2D renderer, string json)
{
if (renderer == null)
{
throw new ArgumentNullException(nameof(renderer));
}
if (json == null)
{
throw new ArgumentNullException(nameof(json));
}
if (string.IsNullOrWhiteSpace(json))
{
throw new ArgumentEmptyException(nameof(json));
}
string animName = string.Empty;
float animLength = 0;
int loopCount = 0;
bool isLooped = false;
var colorConvert = new JsonGorgonColorKeyConverter();
var textureConvert = new JsonTextureKeyConverter(renderer.Graphics);
var vec3Converter = new JsonVector3KeyConverter();
var rectConverter = new JsonRectKeyConverter();
TrackInterpolationMode posInterp = TrackInterpolationMode.None;
TrackInterpolationMode scaleInterp = TrackInterpolationMode.None;
TrackInterpolationMode rotInterp = TrackInterpolationMode.None;
TrackInterpolationMode sizeInterp = TrackInterpolationMode.None;
TrackInterpolationMode colorInterp = TrackInterpolationMode.None;
TrackInterpolationMode boundInterp = TrackInterpolationMode.None;
List <GorgonKeyVector3> positions = null;
List <GorgonKeyVector3> rotations = null;
List <GorgonKeyVector3> scales = null;
List <GorgonKeyVector3> sizes = null;
List <GorgonKeyGorgonColor> colors = null;
List <GorgonKeyRectangle> bounds = null;
List <GorgonKeyTexture2D> textures = null;
using (var baseReader = new StringReader(json))
using (var reader = new JsonTextReader(baseReader))
{
if (!IsReadableJObject(reader))
{
throw new GorgonException(GorgonResult.CannotRead, Resources.GOR2DIO_ERR_JSON_NOT_ANIM);
}
while (reader.Read())
{
if (reader.TokenType != JsonToken.PropertyName)
{
continue;
}
string propName = reader.Value.ToString().ToUpperInvariant();
switch (propName)
{
case "POSITIONS":
positions = ReadVector3(reader, vec3Converter, out posInterp);
break;
case "SCALES":
scales = ReadVector3(reader, vec3Converter, out scaleInterp);
break;
case "ROTATIONS":
rotations = ReadVector3(reader, vec3Converter, out rotInterp);
break;
case "SIZE":
sizes = ReadVector3(reader, vec3Converter, out sizeInterp);
break;
case "BOUNDS":
bounds = ReadRects(reader, rectConverter, out boundInterp);
break;
case "COLORS":
colors = ReadColors(reader, colorConvert, out colorInterp);
break;
case "TEXTURES":
textures = ReadTextures(reader, textureConvert);
break;
case "NAME":
animName = reader.ReadAsString();
break;
case "LENGTH":
animLength = (float)(reader.ReadAsDecimal() ?? 0);
break;
case "ISLOOPED":
isLooped = (reader.ReadAsBoolean() ?? false);
break;
case "LOOPCOUNT":
loopCount = (reader.ReadAsInt32() ?? 0);
break;
}
}
}
// There's no name, so it's a broken JSON.
if (string.IsNullOrWhiteSpace(animName))
{
throw new GorgonException(GorgonResult.CannotRead, Resources.GOR2DIO_ERR_JSON_NOT_ANIM);
}
var builder = new GorgonAnimationBuilder();
if ((positions != null) && (positions.Count > 0))
{
builder.PositionInterpolationMode(posInterp)
.EditPositions()
.SetKeys(positions)
.EndEdit();
}
if ((scales != null) && (scales.Count > 0))
{
builder.ScaleInterpolationMode(scaleInterp)
.EditScale()
.SetKeys(scales)
.EndEdit();
}
if ((rotations != null) && (rotations.Count > 0))
{
builder.RotationInterpolationMode(rotInterp)
.EditRotation()
.SetKeys(rotations)
.EndEdit();
}
if ((sizes != null) && (sizes.Count > 0))
{
builder.SizeInterpolationMode(sizeInterp)
.EditSize()
.SetKeys(sizes)
.EndEdit();
}
if ((colors != null) && (colors.Count > 0))
{
builder.ColorInterpolationMode(colorInterp)
.EditColors()
.SetKeys(colors)
.EndEdit();
}
if ((bounds != null) && (bounds.Count > 0))
{
builder.RotationInterpolationMode(boundInterp)
.EditRectangularBounds()
.SetKeys(bounds)
.EndEdit();
}
if ((textures != null) && (textures.Count > 0))
{
builder.Edit2DTexture()
.SetKeys(textures)
.EndEdit();
}
IGorgonAnimation result = builder.Build(animName, animLength);
result.LoopCount = loopCount;
result.IsLooped = isLooped;
result.Speed = 1.0f;
return(result);
}
