SpriteRenderTargetHelper.cs

Go to the documentation of this file.

using System.Collections.Generic;
using System.Runtime.InteropServices;
using Microsoft.Xna.Framework;
using Terraria.DataStructures;
 
namespace Terraria.Graphics;
 
[StructLayout(LayoutKind.Sequential, Size = 1)]
public struct SpriteRenderTargetHelper
{
    public static void GetDrawBoundary(List<DrawData> playerDrawData, out Vector2 lowest, out Vector2 highest)
    {
        lowest = Vector2.Zero;
        highest = Vector2.Zero;
        for (int i = 0; i <= playerDrawData.Count; i++)
        {
            if (i != playerDrawData.Count)
            {
                DrawData cdd = playerDrawData[i];
                if (i == 0)
                {
                    lowest = cdd.position;
                    highest = cdd.position;
                }
                GetHighsAndLowsOf(ref lowest, ref highest, ref cdd);
            }
        }
    }
 
    public static void GetHighsAndLowsOf(ref Vector2 lowest, ref Vector2 highest, ref DrawData cdd)
    {
        Vector2 origin = cdd.origin;
        Rectangle rectangle = cdd.destinationRectangle;
        if (cdd.sourceRect.HasValue)
        {
            rectangle = cdd.sourceRect.Value;
        }
        if (!cdd.sourceRect.HasValue)
        {
            rectangle = cdd.texture.Frame();
        }
        rectangle.X = 0;
        rectangle.Y = 0;
        Vector2 pos = cdd.position;
        GetHighsAndLowsOf(ref lowest, ref highest, ref cdd, ref pos, ref origin, new Vector2(0f, 0f));
        GetHighsAndLowsOf(ref lowest, ref highest, ref cdd, ref pos, ref origin, new Vector2(rectangle.Width, 0f));
        GetHighsAndLowsOf(ref lowest, ref highest, ref cdd, ref pos, ref origin, new Vector2(0f, rectangle.Height));
        GetHighsAndLowsOf(ref lowest, ref highest, ref cdd, ref pos, ref origin, new Vector2(rectangle.Width, rectangle.Height));
    }
 
    public static void GetHighsAndLowsOf(ref Vector2 lowest, ref Vector2 highest, ref DrawData cdd, ref Vector2 pos, ref Vector2 origin, Vector2 corner)
    {
        Vector2 corner2 = GetCorner(ref cdd, ref pos, ref origin, corner);
        lowest = Vector2.Min(lowest, corner2);
        highest = Vector2.Max(highest, corner2);
    }
 
    public static Vector2 GetCorner(ref DrawData cdd, ref Vector2 pos, ref Vector2 origin, Vector2 corner)
    {
        Vector2 spinningpoint = corner - origin;
        return pos + spinningpoint.RotatedBy(cdd.rotation) * cdd.scale;
    }
}