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https://github.com/Ellpeck/MLEM.git
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67 lines
No EOL
2.6 KiB
C#
67 lines
No EOL
2.6 KiB
C#
using System.Linq;
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using System.Reflection;
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using Microsoft.Xna.Framework;
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using Microsoft.Xna.Framework.Graphics;
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using MLEM.Extensions;
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using MLEM.Misc;
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using MLEM.Startup;
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using MLEM.Ui;
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using MLEM.Ui.Elements;
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namespace Demos {
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public class EasingsDemo : Demo {
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private static readonly FieldInfo[] EasingFields = typeof(Easings)
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.GetFields(BindingFlags.Public | BindingFlags.Static).ToArray();
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private static readonly Easings.Easing[] Easings = EasingFields
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.Select(f => (Easings.Easing) f.GetValue(null)).ToArray();
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private Group group;
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private int current;
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private float progress;
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public EasingsDemo(MlemGame game) : base(game) {
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}
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public override void LoadContent() {
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base.LoadContent();
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this.group = new Group(Anchor.TopCenter, Vector2.One) {SetWidthBasedOnChildren = true};
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this.group.AddChild(new Button(Anchor.AutoCenter, new Vector2(30, 10), "Next") {
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OnPressed = e => {
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this.current = (this.current + 1) % Easings.Length;
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this.progress = 0;
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}
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});
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this.group.AddChild(new Paragraph(Anchor.AutoCenter, 1, p => EasingFields[this.current].Name, true));
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this.UiRoot.AddChild(this.group);
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}
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public override void Clear() {
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this.group.Parent.RemoveChild(this.group);
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}
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public override void DoDraw(GameTime time) {
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this.GraphicsDevice.Clear(Color.CornflowerBlue);
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base.DoDraw(time);
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this.SpriteBatch.Begin(SpriteSortMode.Deferred, null, SamplerState.PointClamp);
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var view = this.GraphicsDevice.Viewport;
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// graph the easing function
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var graphEase = Easings[this.current].ScaleInput(0, view.Width).ScaleOutput(-view.Height / 3, view.Height / 3);
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for (var x = 0; x < view.Width; x++) {
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var area = new RectangleF(x - 2, view.Height / 2 - graphEase(x) - 2, 4, 4);
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this.SpriteBatch.Draw(this.SpriteBatch.GetBlankTexture(), area, Color.Green);
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}
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// draw a little dot to show what it would look like
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this.progress = (this.progress + (float) time.ElapsedGameTime.TotalSeconds / 2) % 1;
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var dotEase = Easings[this.current].AndReverse().ScaleOutput(0, view.Height / 4);
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var pos = new RectangleF(view.Width / 2 - 4, view.Height - 20 - dotEase(this.progress), 8, 8);
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this.SpriteBatch.Draw(this.SpriteBatch.GetBlankTexture(), pos, Color.Red);
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this.SpriteBatch.End();
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}
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}
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} |