/// <summary>
/// Performs pixel level collision between two masks
/// </summary>
/// <param name="mask1">The mask1.</param>
/// <param name="mask2">The mask2.</param>
/// <param name="x">The x.</param>
/// <param name="y">The y.</param>
/// <returns></returns>
public static bool Collision(string mask1, string mask2, float x, float y)
{
CanvasElement canvas1 = _masks[mask1];
if (x > canvas1.Width || y > canvas1.Height)
{
return(false);
}
CanvasElement canvas2 = _masks[mask2];
if (canvas2.Width + x < 0 || canvas2.Height + y < 0)
{
return(false);
}
int top = Math.Round(Math.Max(0, y));
int height = Math.Round(Math.Min(canvas1.Height, y + canvas2.Height) - top);
int left = Math.Round(Math.Max(0, x));
int width = Math.Round(Math.Min(canvas1.Width, x + canvas2.Width) - left);
if (width <= 0 || height <= 0)
{
return(false);
}
CanvasElement checkCanvas = (CanvasElement)Document.CreateElement("Canvas");
checkCanvas.Width = width;
checkCanvas.Height = height;
CanvasContext2D context = (CanvasContext2D)checkCanvas.GetContext(Rendering.Render2D);
context.FillStyle = "white";
context.FillRect(0, 0, checkCanvas.Width, checkCanvas.Height);
context.CompositeOperation = CompositeOperation.Xor;
context.DrawImage(canvas1, left, top, width, height, 0, 0, width, height);
context.DrawImage(canvas2, Math.Round(left - x), Math.Round(top - y), width, height, 0, 0, width, height);
PixelArray data = context.GetImageData(0, 0, width, height).Data;
for (int i = 0; i < data.Length; i += 4)
{
if ((int)data[i] > 0)
{
return(true);
}
}
return(false);
}
public Color GetColorFromClick(ElementEvent e)
{
ImageElement image = Document.GetElementById <ImageElement>("colorhex");
CanvasElement canvas = (CanvasElement)Document.CreateElement("canvas");
canvas.Width = image.Width;
canvas.Height = image.Height;
CanvasContext2D ctx = (CanvasContext2D)canvas.GetContext(Rendering.Render2D);
ctx.DrawImage(image, 0, 0);
PixelArray pixels = ctx.GetImageData(e.OffsetX, e.OffsetY, 1, 1).Data;
Color = Color.FromArgb((float)pixels[3], (float)pixels[0], (float)pixels[1], (float)pixels[2]);
return(Color);
}
public void PickColor(ElementEvent e)
{
DivElement picker = Document.GetElementById <DivElement>("colorpicker");
ImageElement image = Document.GetElementById <ImageElement>("colorhex");
CanvasElement canvas = (CanvasElement)Document.CreateElement("canvas");
canvas.Width = image.Width;
canvas.Height = image.Height;
CanvasContext2D ctx = (CanvasContext2D)canvas.GetContext(Rendering.Render2D);
ctx.DrawImage(image, 0, 0);
PixelArray pixels = ctx.GetImageData(e.OffsetX, e.OffsetY, 1, 1).Data;
Color = Color.FromArgb((float)pixels[3], (float)pixels[0], (float)pixels[1], (float)pixels[2]);
if (CallBack != null)
{
CallBack(Color);
}
}
