/// <summary>
/// Draws an Image in parts to form a horizontally waving image.
/// </summary>
/// <param name="image">The image to draw.</param>
/// <param name="step">How many steps to iterate through for the wave.</param>
/// <param name="timer">The timer the wave should act with.</param>
/// <param name="rate">The rate which the wave should move at.</param>
/// <param name="amp">How far the wave will offset the image.</param>
/// <param name="freq">How frequent the wave should repeat.</param>
/// <param name="x">The x position to draw the image from.</param>
/// <param name="y">The y position to draw the image from.</param>
static public void ImageWaveX(OtterDrawables.Image image, int step, float timer, float rate, float amp, float freq, float x = 0, float y = 0)
{
for (var yy = 0; yy < image.Height; yy += step)
{
yy = (int)Util.Clamp(yy, image.Height);
var xx = (int)Util.SinScale(timer * rate + yy * freq, -amp, amp);
ImageClip(image, new Rectangle(0, yy, image.Width, step), x + xx, y);
}
}
/// <summary>
/// Draws an Image in parts to form a vertically waving image.
/// </summary>
/// <param name="image">The image to draw.</param>
/// <param name="step">How many steps to iterate through for the wave.</param>
/// <param name="timer">The timer the wave should act with.</param>
/// <param name="rate">The rate which the wave should move at.</param>
/// <param name="amp">How far the wave will offset the image.</param>
/// <param name="freq">How frequent the wave should repeat.</param>
/// <param name="x">The x position to draw the image from.</param>
/// <param name="y">The y position to draw the image from.</param>
static public void ImageWaveY(OtterDrawables.Image image, int step, float timer, float rate, float amp, float freq, float x = 0, float y = 0)
{
for (var xx = 0; xx < image.Width; xx += step)
{
xx = (int)Util.Clamp(xx, image.Width);
var yy = (int)Util.SinScale(timer * rate + xx * freq, -amp, amp);
ImageClip(image, new Rectangle(xx, 0, step, image.Height), x, y + yy);
}
}
/// <summary>
/// Renders a clipped Image to the current target Surface.
/// </summary>
/// <param name="image">the Image to render.</param>
/// <param name="clip">The portion of the Image to render.</param>
/// <param name="x">The x offset to position the Image at.</param>
/// <param name="y">The y offset to position the Image at.</param>
static public void ImageClip(OtterDrawables.Image image, Rectangle clip, float x = 0, float y = 0)
{
var tempRect = image.ClippingRegion;
image.ClippingRegion = clip;
image.Render(x, y);
image.ClippingRegion = tempRect;
}
