private void BatchLeafSprite(LeafSprite sprite, float sizeMultiplier)
{
float scale = sprite.Size / (float)textures[sprite.TextureIndex].Width * sizeMultiplier;
Vector2 textureCenter = new Vector2(textures[sprite.TextureIndex].Width, textures[sprite.TextureIndex].Height) / 2.0f;
spriteBatch.Draw(textures[sprite.TextureIndex], sprite.Center, null, Color.White, sprite.Angle, textureCenter, scale, SpriteEffects.None, 0.0f);
}
private LeafSprite FindClosestSpriteUnderPoint(Vector2 searchPoint)
{
float closestDistanceSQ = 1e20f;
LeafSprite closest = null;
for (int i = 0; i < sprites.Count; i++)
{
LeafSprite sprite = sprites[i];
// Determine if cursor is inside the sprite's rectangle
Vector2 leafToCursor = searchPoint - sprite.Center;
Vector2 localX = new Vector2((float)Math.Cos(sprite.Angle), (float)Math.Sin(sprite.Angle));
Vector2 localY = new Vector2(-localX.Y, localX.X);
Vector2 localCoords = new Vector2(
Vector2.Dot(leafToCursor, localX),
Vector2.Dot(leafToCursor, localY)
);
// If outside rectangle, skip this sprite
if (Math.Abs(localCoords.X) > sprite.Size / 2 || Math.Abs(localCoords.Y) > sprite.Size / 2)
{
continue;
}
float distanceSQ = localCoords.LengthSquared();
if (distanceSQ < closestDistanceSQ)
{
closestDistanceSQ = distanceSQ;
closest = sprite;
}
}
return(closest);
}
private void DeleteSpriteAtCursor()
{
LeafSprite sprite = FindClosestSpriteUnderPoint(MousePos);
if (sprite == null)
{
return;
}
sprites.Remove(sprite);
}
private void DrawBackgroundLeaves()
{
GraphicsDevice.RenderState.ColorWriteChannels = ColorWriteChannels.Red | ColorWriteChannels.Green | ColorWriteChannels.Blue;
spriteBatch.Begin(SpriteBlendMode.AlphaBlend);
for (int i = 0; i < sprites.Count; i++)
{
LeafSprite sprite = sprites[sprites.Count - i - 1];
BatchLeafSprite(sprite, 2.0f);
}
spriteBatch.End();
GraphicsDevice.RenderState.ColorWriteChannels = ColorWriteChannels.All;
}
private void DrawBackgroundLeaves()
{
BlendState savedBlendState = GraphicsDevice.BlendState;
GraphicsDevice.BlendState = ChangeColorWriteChannels(savedBlendState,
ColorWriteChannels.Red | ColorWriteChannels.Green | ColorWriteChannels.Blue);
spriteBatch.Begin(SpriteSortMode.Immediate, BlendState.AlphaBlend);
for (int i = 0; i < sprites.Count; i++)
{
LeafSprite sprite = sprites[sprites.Count - i - 1];
BatchLeafSprite(sprite, 2.0f);
}
spriteBatch.End();
GraphicsDevice.BlendState = ChangeColorWriteChannels(savedBlendState,
ColorWriteChannels.All);
}
protected override void LoadContent()
{
spriteBatch = new SpriteBatch(GraphicsDevice);
textures = new Texture2D[textureFilenames.Length];
for (int i = 0; i < textures.Length; i++)
{
textures[i] = Content.Load <Texture2D>(String.Format(textureFilenameFormat, textureFilenames[i]));
}
renderTarget = new RenderTarget2D(GraphicsDevice, 256, 256, 1, SurfaceFormat.Color);
mouseSprite = new LeafSprite(Vector2.Zero, 32, 0, 0);
imageSize = new Vector2(256, 256);
pivot = imageSize / 2.0f;
pivotTexture = Content.Load <Texture2D>("Textures/Pivot");
}
private void BatchLeafSprite(LeafSprite sprite)
{
BatchLeafSprite(sprite, 1.0f);
}
private void BatchLeafSprite(LeafSprite sprite, float sizeMultiplier)
{
float scale = sprite.Size / (float)textures[sprite.TextureIndex].Width * sizeMultiplier;
Vector2 textureCenter = new Vector2(textures[sprite.TextureIndex].Width, textures[sprite.TextureIndex].Height) / 2.0f;
spriteBatch.Draw(textures[sprite.TextureIndex], sprite.Center, null, Color.White, sprite.Angle, textureCenter, scale, SpriteEffects.None, 0.0f);
}
private void BatchLeafSprite(LeafSprite sprite)
{
BatchLeafSprite(sprite, 1.0f);
}
protected override void LoadContent()
{
spriteBatch = new SpriteBatch(GraphicsDevice);
textures = new Texture2D[textureFilenames.Length];
for (int i = 0; i < textures.Length; i++)
{
textures[i] = Content.Load<Texture2D>(String.Format(textureFilenameFormat, textureFilenames[i]));
}
renderTarget = new RenderTarget2D(GraphicsDevice, 256, 256, 1, SurfaceFormat.Color);
mouseSprite = new LeafSprite(Vector2.Zero, 32, 0, 0);
imageSize = new Vector2(256, 256);
pivot = imageSize / 2.0f;
pivotTexture = Content.Load<Texture2D>("Textures/Pivot");
}