protected override TextureArea CreateTextureArea(
TextureArea originalTextureArea, TextureAtlasTextureDefinition definition)
{
return new CachedTexture(
originalTextureArea.TextureId, definition.TopLeft,
definition.BottomRight, definition.Width, definition.Height);
}
public void Update()
{
if (_areaNext == null)
return;
_areaCurrent = _areaNext;
_areaNext = null;
if (OnChange != null)
OnChange(this);
}
public TextureArea GetTexture(string filename, Rectangle rectangle)
{
var newTexture = GetTextureFromCache(filename);
// Determine pixel coordinates
var topLeft = new Vector
{
X = rectangle.TopLeft.X / newTexture.Width,
Y = rectangle.TopLeft.Y / newTexture.Height
};
var bottomRight = new Vector
{
X = rectangle.BottomRight.X / newTexture.Width,
Y = rectangle.BottomRight.Y / newTexture.Height
};
var newTextureArea = new TextureArea(newTexture.TextureId, new Vector(topLeft.X, topLeft.Y), new Vector(bottomRight.X, bottomRight.Y));
return newTextureArea;
}
/// <summary>
/// Load a texture. This texture may be loaded into a texture atlas.
/// </summary>
/// <param name="filename"></param>
/// <returns></returns>
public TextureArea GetTexture(string filename)
{
var cachedTexture = GetTextureFromCache(filename);
var newTextureArea = new TextureArea(cachedTexture.TextureId);
return newTextureArea;
}
private static void WriteQuad(TextureArea texture, Rectangle rect, IDataStream<TransformedColouredTexturedVertex> dataStream, float alpha)
{
rect = rect.Translate(-0.5f, -0.5f);
dataStream.WriteRange(
new[]
{
MakeVertex(rect.TopLeft, texture.AtlasTopLeft, alpha),
MakeVertex(rect.BottomRight, texture.AtlasBottomRight, alpha),
MakeVertex(rect.BottomLeft, texture.AtlasBottomLeft, alpha),
MakeVertex(rect.TopLeft, texture.AtlasTopLeft, alpha),
MakeVertex(rect.TopRight, texture.AtlasTopRight, alpha),
MakeVertex(rect.BottomRight, texture.AtlasBottomRight, alpha)
});
}
private static void WriteCroppedQuad(TextureArea texture, Rectangle rect,
IDataStream<TransformedColouredTexturedVertex> dataStream, float horizontalCrop, float verticalCrop)
{
rect = rect.Translate(-0.5f, -0.5f).Scale(horizontalCrop, verticalCrop);
var atlasRect = new Rectangle(texture.AtlasTopLeft, texture.AtlasBottomRight);
atlasRect = atlasRect.Scale(horizontalCrop, verticalCrop);
dataStream.WriteRange(
new[]
{
MakeVertex(rect.TopLeft, atlasRect.TopLeft),
MakeVertex(rect.BottomRight, atlasRect.BottomRight),
MakeVertex(rect.BottomLeft, atlasRect.BottomLeft),
MakeVertex(rect.TopLeft, atlasRect.TopLeft),
MakeVertex(rect.TopRight, atlasRect.TopRight),
MakeVertex(rect.BottomRight, atlasRect.BottomRight)
});
}
public TextureAreaHolder(TextureArea area)
{
_areaCurrent = area;
_areaNext = null;
}
protected abstract TextureArea CreateTextureArea(TextureArea cachedTexture, TextureAtlasTextureDefinition definition);
