protected override void Update()
{
if (!Enabled)
{
return;
}
base.Update();
var currentTime = Time.Current;
var isCreateShow = !Children.Any() ||
(Children.LastOrDefault() as SnowSprite)?.CreateTime
+ 1000 / SnowGenerateParSecond < currentTime;
// If can generate new snow
if (isCreateShow && EnableNewSnow)
{
var currentAlpha = (float)random.Next(0, 255) / 255;
var width = (int)DrawWidth;
var newFlake = new SnowSprite
{
Anchor = Anchor.TopCentre,
Origin = Anchor.Centre,
Colour = Color4.White,
Position = new Vector2(random.Next(-width / 2, width / 2), -40),
Depth = 1,
CreateTime = currentTime,
Size = new Vector2(50, 50),
Scale = new Vector2(1, 1) * SnowSize,
Alpha = currentAlpha,
HorizontalSpeed = random.Next(-100, 100) + WingAffection * 10
};
Add(newFlake);
}
// Update each snow position
foreach (var drawable in Children)
{
if (!(drawable is SnowSprite snow))
{
continue;
}
snow.X += snow.HorizontalSpeed / 1000f;
snow.Y += 1 * Speed;
// Recycle
if (snow.CreateTime + SnowExpireTime < currentTime)
{
Children.ToList().Remove(snow);
}
}
}
public void SnowFallingAnimation(int numberOfSnowflakes)
{
int FrameWidth = 95;
int FrameHeight = 95;
// Create a NameScope for this page so that
// Storyboards can be used.
NameScope.SetNameScope(this, new NameScope());
Canvas containerCanvas = new Canvas();
List <string> sprites = new List <string>();
for (int i = 1; i <= numberOfSnowflakes; i++)
{
string spriteName = "SnowSprite" + i.ToString("0000");
AnimatingSprites.Add(spriteName);
RectangleGeometry myRectangleGeometry = new RectangleGeometry();
var randomStartY = RandomNumber(0, (int)this.MainGrid.ActualWidth - FrameWidth);
int randomStartX = -RandomNumber(FrameHeight, FrameHeight * 4);
var randomDuration = RandomNumber(1000, 4000);
myRectangleGeometry.Rect = new Rect(randomStartY, randomStartX, FrameWidth, FrameHeight);
// Assign the geometry a name so that
// it can be targeted by a Storyboard.
this.RegisterName(
spriteName, myRectangleGeometry);
Sprite sprite = new SnowSprite(FrameWidth, FrameHeight, 1000, 4000, "SnowSprite.png", randomStartY, randomStartX);
var p = sprite.DoThing(myRectangleGeometry, this.MainGrid, spriteName, this);
sprite.AnimationComplete += HalloweenSpiderRectAnimation_Completed;
// Start the storyboard when the Path loads.
containerCanvas.Children.Add(p);
Content = containerCanvas;
}
}
private async Task OnCreateResourcesAsync(EngineCreateResourcesEventArgs e)
{
var grass = GrassSprite.Resolve(Entity);
var snow = SnowSprite.Resolve(Entity);
var rock = RockSprite.Resolve(Entity);
var heightMap = _terrain.HeightMap.Resolve(Entity);
if (!heightMap.IsPreScaled || !grass.IsPreScaled || !snow.IsPreScaled || !rock.IsPreScaled)
{
throw new ArgumentException("The heightmap, grass, snow and rock textures must be prescaled in order to be used for terrain rendering");
}
// Calculate average colors (these are used at small zoom levels)
_grassColor = GetAverageColor(e.Sender, grass.Image);
_snowColor = GetAverageColor(e.Sender, snow.Image);
_rockColor = GetAverageColor(e.Sender, rock.Image);
_normalHeightMap = await RenderNormalHeightMapAsync(e.Sender, heightMap.Image, _terrain.Height - _terrain.BaseHeight);
var wrap = CanvasEdgeBehavior.Wrap;
var grassTiled = new BorderEffect {
Source = grass.Image, ExtendX = wrap, ExtendY = wrap, CacheOutput = true
};
var snowTiled = new BorderEffect {
Source = snow.Image, ExtendX = wrap, ExtendY = wrap, CacheOutput = true
};
var rockTiled = new BorderEffect {
Source = rock.Image, ExtendX = wrap, ExtendY = wrap, CacheOutput = true
};
var shaderBytes = await Utilities.ReadBytesFromUriAsync(new Uri("ms-appx:///Shaders/TerrainShader.bin"));
_terrainMap = new PixelShaderEffect(shaderBytes)
{
Source1 = _normalHeightMap,
Source2 = grassTiled,
Source3 = snowTiled,
Source4 = rockTiled,
CacheOutput = true
};
}
