50 lines
1.6 KiB
C#
50 lines
1.6 KiB
C#
using Microsoft.Xna.Framework;
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using Microsoft.Xna.Framework.Graphics;
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using System;
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namespace RecrownedAthenaeum.Camera
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{
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/// <summary>
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/// A virtual 2D camera that wraps the normal <see cref="Camera"/>. Default projection is orthographic.
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/// </summary>
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public class Camera2D : Camera
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{
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/// <summary>
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/// The 2D position.
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/// </summary>
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public Vector2 Position { get { return new Vector2(position.X, position.Y); } set { position.X = value.X; position.Y = value.Y; } }
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/// <summary>
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/// A 2D camera from the generic <see cref="Camera"/>.
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/// </summary>
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public Camera2D() : base()
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{
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}
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/// <summary>
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/// Lerps to the given position.
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/// </summary>
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/// <param name="alpha">The multiplier for difference in distance.</param>
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/// <param name="targetPosition">The target position to lerp to.</param>
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/// <param name="delta">Time between this frame and the previous frame.</param>
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public void LinearInterpolationToPosition(float alpha, Vector2 targetPosition, float delta)
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{
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if (alpha <= 0 && alpha > 1f) throw new ArgumentException("Alpha can't be greater than 1f, less than or equal to 0.");
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Vector2 distance = targetPosition - Position;
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distance *= (float)(1.0f - Math.Pow(1 - alpha, delta / 0.02f));
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Position += distance;
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Apply();
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}
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private Matrix BasicOrthographic()
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{
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return Matrix.CreateOrthographic(graphicsDevice.Viewport.Width, graphicsDevice.Viewport.Height, 0, 1);
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}
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}
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}
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