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added camera scaling

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This commit is contained in:
Ellpeck 2019-11-10 22:36:25 +01:00
parent 47af6f992a
commit ee051f2ab0
2 changed files with 43 additions and 3 deletions
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15
MLEM/Cameras/Camera.cs
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@ -8,7 +8,13 @@ namespace MLEM.Cameras {
public class Camera {
public Vector2 Position;
public float Scale = 1;
public float Scale {
get => this.scale;
set => this.scale = MathHelper.Clamp(value, this.MinScale, this.MaxScale);
}
private float scale = 1;
public float MinScale = 0;
public float MaxScale = float.MaxValue;
public bool AutoScaleWithScreen;
public Point AutoScaleReferenceSize;
public float ActualScale {
@ -76,5 +82,12 @@ namespace MLEM.Cameras {
this.Max = new Vector2(this.Max.X, max.Y);
}
public void Zoom(float delta, Vector2? zoomCenter = null) {
var center = (zoomCenter ?? this.Viewport.Size.ToVector2() / 2) / this.ActualScale;
var lastScale = this.Scale;
this.Scale += delta;
this.Position += center * ((this.Scale - lastScale) / this.Scale);
}
}
}

31
Sandbox/GameImpl.cs
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@ -2,6 +2,9 @@ using System;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using MLEM.Cameras;
using MLEM.Extended.Extensions;
using MLEM.Extended.Tiled;
using MLEM.Extensions;
using MLEM.Font;
using MLEM.Startup;
@ -9,10 +12,15 @@ using MLEM.Textures;
using MLEM.Ui;
using MLEM.Ui.Elements;
using MLEM.Ui.Style;
using MonoGame.Extended.Tiled;
namespace Sandbox {
public class GameImpl : MlemGame {
private Camera camera;
private TiledMap map;
private IndividualTiledMapRenderer mapRenderer;
public GameImpl() {
this.IsMouseVisible = true;
this.Window.ClientSizeChanged += (o, args) => {
@ -23,7 +31,18 @@ namespace Sandbox {
protected override void LoadContent() {
base.LoadContent();
var tex = LoadContent<Texture2D>("Textures/Test");
this.map = LoadContent<TiledMap>("Tiled/Map");
this.mapRenderer = new IndividualTiledMapRenderer(this.map);
this.camera = new Camera(this.GraphicsDevice) {
AutoScaleWithScreen = true,
Scale = 2,
LookingPosition = new Vector2(25, 25) * this.map.GetTileSize(),
MinScale = 0.25F,
MaxScale = 4
};
/*var tex = LoadContent<Texture2D>("Textures/Test");
this.UiSystem.Style = new UntexturedStyle(this.SpriteBatch) {
Font = new GenericSpriteFont(LoadContent<SpriteFont>("Fonts/TestFont")),
TextScale = 0.1F,
@ -37,17 +56,25 @@ namespace Sandbox {
var panel = new Panel(Anchor.Center, new Vector2(0, 100), Vector2.Zero) {SetWidthBasedOnChildren = true};
panel.AddChild(new Button(Anchor.AutoLeft, new Vector2(100, 10)));
panel.AddChild(new Button(Anchor.AutoCenter, new Vector2(80, 10)));
this.UiSystem.Add("Panel", panel);
this.UiSystem.Add("Panel", panel);*/
}
protected override void Update(GameTime gameTime) {
base.Update(gameTime);
if (this.InputHandler.IsKeyPressed(Keys.F11))
this.GraphicsDeviceManager.SetFullscreen(!this.GraphicsDeviceManager.IsFullScreen);
var delta = this.InputHandler.ScrollWheel - this.InputHandler.LastScrollWheel;
if (delta != 0) {
this.camera.Zoom(0.1F * Math.Sign(delta), this.InputHandler.MousePosition.ToVector2());
}
}
protected override void DoDraw(GameTime gameTime) {
this.GraphicsDevice.Clear(Color.Black);
this.SpriteBatch.Begin(SpriteSortMode.Deferred, null, SamplerState.PointClamp, null, null, null, this.camera.ViewMatrix);
this.mapRenderer.Draw(this.SpriteBatch, this.camera.GetVisibleRectangle().ToExtended());
this.SpriteBatch.End();
base.DoDraw(gameTime);
}