DrawAnimationVertical.cs

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using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
 
namespace Terraria.DataStructures;
 
public class DrawAnimationVertical : DrawAnimation
{
    public bool PingPong;
 
    public bool NotActuallyAnimating;
 
    public DrawAnimationVertical(int ticksperframe, int frameCount, bool pingPong = false)
    {
        Frame = 0;
        FrameCounter = 0;
        FrameCount = frameCount;
        TicksPerFrame = ticksperframe;
        PingPong = pingPong;
    }
 
    public override void Update()
    {
        if (NotActuallyAnimating || ++FrameCounter < TicksPerFrame)
        {
            return;
        }
        FrameCounter = 0;
        if (PingPong)
        {
            if (++Frame >= FrameCount * 2 - 2)
            {
                Frame = 0;
            }
        }
        else if (++Frame >= FrameCount)
        {
            Frame = 0;
        }
    }
 
    public override Rectangle GetFrame(Texture2D texture, int frameCounterOverride = -1)
    {
        if (frameCounterOverride != -1)
        {
            int num = frameCounterOverride / TicksPerFrame;
            int num2 = FrameCount;
            if (PingPong)
            {
                num2 = num2 * 2 - 1;
            }
            int num3 = num % num2;
            if (PingPong && num3 >= FrameCount)
            {
                num3 = FrameCount * 2 - 2 - num3;
            }
            Rectangle result = texture.Frame(1, FrameCount, 0, num3);
            result.Height -= 2;
            return result;
        }
        int frameY = Frame;
        if (PingPong && Frame >= FrameCount)
        {
            frameY = FrameCount * 2 - 2 - Frame;
        }
        Rectangle result2 = texture.Frame(1, FrameCount, 0, frameY);
        result2.Height -= 2;
        return result2;
    }
}