public void Draw(Graphics graphics, RectangleD cameraBounds)
{
var particleBounds = new List <RectangleF>();
foreach (Particle particle in _particles)
{
if (particle.IsActive)
{
if (cameraBounds.Contains(particle.Position))
{
PointF localPoint = RenderUtils.WorldToScreen(particle.Position, cameraBounds);
particleBounds.Add(new RectangleF(localPoint.X, localPoint.Y, 1.5f, 1.5f));
}
}
}
RenderUtils.DrawRectangles(graphics, particleBounds, Color.FromArgb(200, 255, 255, 0));
}
public Bitmap GenerateTexture(double sootRatio)
{
// Simple case for soot texture
if (sootRatio > 0.99)
{
return(_sootTexture);
}
// Simple case for base texture
if (sootRatio < 0.01)
{
return(_baseTexture);
}
// Otherwise blend
// Build the main texture (a combination of base and soot)
using (Graphics graphics = RenderUtils.GetContext(false, _sootBuffer))
{
graphics.DrawImage(_baseTexture, new Rectangle(0, 0, _sootBuffer.Width, _sootBuffer.Height));
float[][] matrixAlpha =
{
new float[] { 1, 0, 0, 0, 0 },
new float[] { 0, 1, 0, 0, 0 },
new float[] { 0, 0, 1, 0, 0 },
new float[] { 0, 0, 0, (float)sootRatio, 0 },
new float[] { 0, 0, 0, 0, 1 }
};
ColorMatrix colorMatrix = new ColorMatrix(matrixAlpha);
ImageAttributes iaAlphaBlend = new ImageAttributes();
iaAlphaBlend.SetColorMatrix(colorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
graphics.DrawImage(_sootTexture, new Rectangle(0, 0, _sootBuffer.Width, _sootBuffer.Height), 0, 0,
_sootBuffer.Width, _sootBuffer.Height, GraphicsUnit.Pixel, iaAlphaBlend);
}
return(_sootBuffer);
}