/// <summary>
/// Draws the <see cref="IRefractionEffect"/>.
/// </summary>
/// <param name="spriteBatch">The <see cref="ISpriteBatch"/> to draw with.</param>
public void Draw(ISpriteBatch spriteBatch)
{
if (IsExpired || !IsEnabled)
{
return;
}
SetShaderParameters(TickCount.Now);
// Draw
var dest = ToRectangle();
var oldBlendMode = spriteBatch.BlendMode;
try
{
spriteBatch.BlendMode = BlendMode.None;
try
{
Shader.Bind();
WaveNoise.Draw(spriteBatch, dest);
}
finally
{
Shader.Unbind();
}
}
finally
{
spriteBatch.BlendMode = oldBlendMode;
}
}
/// <summary>
/// Updates the <see cref="IRefractionEffect"/>.
/// </summary>
/// <param name="currentTime">The current game time in milliseconds.</param>
public void Update(TickCount currentTime)
{
if (IsExpired)
{
return;
}
// Most all of the updating takes place in the shader itself, which is done right before drawing
// Update the sprite
WaveNoise.Update(currentTime);
}