Better animation system

src/main/java/org/saturnclient/ui2/Element.java

@@ -41,6 +41,12 @@ public class Element {
     public void mouseReleased(double mouseX, double mouseY, int button) {
     }
 
+    public void playAnimationFrame(long elapsed) {
+        if (this.animation != null) {
+            this.animation.tick(this.curve.apply(Math.min(1.0, (double) elapsed / this.animation.duration)), this);
+        }
+    }
+
     public Element dimensions(int width, int height) {
         this.width = width;
         this.height = height;

src/main/java/org/saturnclient/ui2/ElementContext.java

@@ -4,13 +4,15 @@ public class ElementContext {
     public int mouseX, mouseY;
     public int elementWidth, elementHeight;
     public float elementScale;
+    public long elapsed;
 
-    public ElementContext(int mouseX, int mouseY, Element e) {
+    public ElementContext(long elapsed, int mouseX, int mouseY, Element e) {
         this.mouseX = mouseX - e.x;
         this.mouseY = mouseY - e.y;
         this.elementWidth = e.width;
         this.elementHeight = e.height;
         this.elementScale = e.scale;
+        this.elapsed = elapsed;
     }
 
     public boolean isHovering() {

src/main/java/org/saturnclient/ui2/SaturnScreen.java

@@ -1,11 +1,11 @@
 package org.saturnclient.ui2;
 
+import java.time.Duration;
+import java.time.Instant;
 import java.util.ArrayList;
 import java.util.List;
 
 import org.saturnclient.saturnclient.mixin.DrawContextAccessor;
-import org.saturnclient.ui2.anim.Animation;
-import org.saturnclient.ui2.anim.SlideXAbsolute;
 import org.saturnclient.ui2.components.ElementRenderer;
 
 import net.minecraft.client.MinecraftClient;
@@ -23,6 +23,7 @@ public abstract class SaturnScreen extends Screen {
     private final Pool pool = new Pool(3);
     protected List<Element> elements = new ArrayList<>();
     protected float backgroundOpacity = 1.0f;
+    protected Instant start = null;
     public int blurDuration = 700;
     public float blurProgress = 0.0f;
     public int backgroundBlur = 10;
@@ -41,36 +42,7 @@ public abstract class SaturnScreen extends Screen {
     }
 
     public void draw(Element element) {
-        synchronized (elements) {
-            elements.add(element);
-        }
-
-        if (element.animation != null) {
-            element.animation.init(element);
-
-            Animation.execute((Float progress) -> {
-                element.animation.tick(progress, element);
-            }, element.animation.duration);
-        }
-
-        if (element.duration != null) {
-            new Thread(() -> {
-                try {
-                    Animation fadeOut = new SlideXAbsolute(700, -(width - element.x));
-                    Thread.sleep(element.duration);
-                    fadeOut.init(element);
-                    Animation.executeSync((Float progress) -> {
-                        fadeOut.tick(progress, element);
-                    }, fadeOut.duration);
-                    synchronized (elements) {
-                        elements.remove(element);
-                    }
-
-                } catch (InterruptedException e) {
-                    e.printStackTrace();
-                }
-            }).start();
-        }
+        ElementRenderer.draw(elements, element);
     }
 
     @Override
@@ -79,10 +51,6 @@ public abstract class SaturnScreen extends Screen {
         width *= 2;
         height *= 2;
         ui(); // abstraction to render the saturn ui and also render extra stuff here
-
-        Animation.execute((Float progress) -> {
-            blurProgress = progress;
-        }, blurDuration);
     }
 
     public abstract void ui();
@@ -90,6 +58,11 @@ public abstract class SaturnScreen extends Screen {
     @SuppressWarnings("deprecation")
     @Override
     public void render(DrawContext context, int mouseX, int mouseY, float delta) {
+        if (start == null) {
+            start = Instant.now();
+        }
+        long elapsed = Duration.between(start, Instant.now()).toMillis();
+
         mouseX *= 2;
         mouseY *= 2;
 
@@ -114,7 +87,7 @@ public abstract class SaturnScreen extends Screen {
 
         renderScope.matrices.scale(0.5f, 0.5f, 0.5f);
 
-        ElementRenderer.render(new ArrayList<>(elements), renderScope, mouseX, mouseY);
+        ElementRenderer.render(new ArrayList<>(elements), elapsed, renderScope, mouseX, mouseY);
 
         renderScope.matrices.pop();
     }

src/main/java/org/saturnclient/ui2/anim/Animation.java

@@ -1,8 +1,5 @@
 package org.saturnclient.ui2.anim;
 
-import java.util.function.Consumer;
-import java.util.function.Function;
-
 import org.saturnclient.ui2.Element;
 
 public abstract class Animation {
@@ -12,64 +9,7 @@ public abstract class Animation {
         this.duration = duration;
     }
 
-    public abstract void tick(float progress, Element element);
+    public abstract void tick(double progress, Element element);
+
     public abstract void init(Element element);
-
-    public static void execute(Consumer<Float> tick, int duration) {
-        new Thread(() -> {
-            Function<Double, Double> curveFunction = Curve::easeInOutCubic;
-            float progress = 0.0f;
-            double incremental = (1000 - duration) / 10000.0;
-
-            for (int i = 0; i <= 100; i++) {
-                float newProgress = (float) (double) curveFunction.apply(i / 100.0);
-
-                while (Math.abs(newProgress - progress) > 1e-6) {
-                    if (progress < newProgress) {
-                        progress += incremental;
-                        if (progress > newProgress) progress = newProgress;
-                    } else {
-                        progress -= incremental;
-                        if (progress < newProgress) progress = newProgress;
-                    }
-
-                    tick.accept(newProgress);
-
-                    try {
-                        Thread.sleep(duration / 100);
-                    } catch (Exception e) {
-                        e.printStackTrace();
-                    }            
-                }
-            }
-        }).start();
-    }
-
-    public static void executeSync(Consumer<Float> tick, int duration) {
-        Function<Double, Double> curveFunction = Curve::easeInOutCubic;
-        float progress = 0.0f;
-        double incremental = (1000 - duration) / 10000.0;
-
-        for (int i = 0; i <= 100; i++) {
-            float newProgress = (float) (double) curveFunction.apply(i / 100.0);
-
-            while (Math.abs(newProgress - progress) > 1e-6) {
-                if (progress < newProgress) {
-                    progress += incremental;
-                    if (progress > newProgress) progress = newProgress;
-                } else {
-                    progress -= incremental;
-                    if (progress < newProgress) progress = newProgress;
-                }
-
-                tick.accept(newProgress);
-
-                try {
-                    Thread.sleep(duration / 100);
-                } catch (Exception e) {
-                    e.printStackTrace();
-                }            
-            }
-        }
-    }
 }

src/main/java/org/saturnclient/ui2/anim/Fade.java

@@ -10,8 +10,8 @@ public class Fade extends Animation {
     }
 
     @Override
-    public void tick(float progress, Element element) {
-        element.opacity = targetOpacity * progress;
+    public void tick(double progress, Element element) {
+        element.opacity = targetOpacity * (float) progress;
     }
 
     @Override

src/main/java/org/saturnclient/ui2/anim/FadeOut.java

@@ -10,8 +10,8 @@ public class FadeOut extends Animation {
     }
 
     @Override
-    public void tick(float progress, Element element) {
-        element.opacity = targetOpacity - progress;
+    public void tick(double progress, Element element) {
+        element.opacity = targetOpacity - (float) progress;
     }
 
     @Override

src/main/java/org/saturnclient/ui2/anim/SlideX.java

@@ -24,7 +24,7 @@ public class SlideX extends Animation {
     }
 
     @Override
-    public void tick(float progress, Element element) {
+    public void tick(double progress, Element element) {
         element.x = elementX + (int) (offset * progress);
     }
 

src/main/java/org/saturnclient/ui2/anim/SlideXAbsolute.java

@@ -24,7 +24,7 @@ public class SlideXAbsolute extends Animation {
     }
 
     @Override
-    public void tick(float progress, Element element) {
+    public void tick(double progress, Element element) {
         element.x = elementX + (int) (offset * progress);
     }
 

src/main/java/org/saturnclient/ui2/anim/SlideY.java

@@ -26,7 +26,7 @@ public class SlideY extends Animation {
     }
     
     @Override
-    public void tick(float progress, Element element) {
+    public void tick(double progress, Element element) {
         element.y = elementY + (int) (offset * progress);
     }
 

src/main/java/org/saturnclient/ui2/components/ElementRenderer.java

@@ -7,7 +7,6 @@ import org.saturnclient.ui2.Element;
 import org.saturnclient.ui2.ElementContext;
 import org.saturnclient.ui2.RenderScope;
 import org.saturnclient.ui2.Utils;
-import org.saturnclient.ui2.anim.Animation;
 
 public class ElementRenderer {
     public static void draw(List<Element> elements, Element element) {
@@ -17,20 +16,18 @@ public class ElementRenderer {
 
         if (element.animation != null) {
             element.animation.init(element);
-
-            Animation.execute((Float progress) -> {
-                element.animation.tick(progress, element);
-            }, element.animation.duration);
         }
     }
 
-    public static void render(List<Element> elements, RenderScope renderScope, int mouseX, int mouseY) {
+    public static void render(List<Element> elements, long elapsed, RenderScope renderScope, int mouseX, int mouseY) {
         for (Element element : elements) {
+            element.playAnimationFrame(elapsed);
+
             renderScope.matrices.push();
             renderScope.setOpacity(element.opacity);
             renderScope.matrices.translate(element.x, element.y, 0);
             renderScope.matrices.scale(element.scale, element.scale, 1.0f);
-            element.render(renderScope, new ElementContext(mouseX, mouseY, element));
+            element.render(renderScope, new ElementContext(elapsed, mouseX, mouseY, element));
             renderScope.matrices.pop();
             renderScope.setRenderLayer(null);
         }

src/main/java/org/saturnclient/ui2/elements/Scroll.java

@@ -36,7 +36,7 @@ public class Scroll extends Element {
         renderScope.matrices.push();
         renderScope.matrices.translate(padding, -scroll + padding, 0);
 
-        ElementRenderer.render(children, renderScope,
+        ElementRenderer.render(children, ctx.elapsed, renderScope,
                 ctx.mouseX - padding,
                 ctx.mouseY - padding + scroll);