Add parallel pre-rendering

src/audio/AudioClient.java

@@ -5,6 +5,7 @@ import engine.Vector3;
 import engine.WorldObject;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.stream.IntStream;
 import shapes.Shape;
 import shapes.Shapes;
 import shapes.Vector2;
@@ -20,20 +21,27 @@ public class AudioClient {
     //  Improve performance of line cleanup with a heuristic.
     //  Pre-render in parallel.
 
-    Camera camera = new Camera(0.8, new Vector3(0, 0, -3));
+    Camera camera = new Camera(0.6, new Vector3(0, 0, -0.08));
     WorldObject object = new WorldObject(args[0], new Vector3(0, 0, 0), new Vector3());
     Vector3 rotation = new Vector3(0,Math.PI / 100,Math.PI / 100);
     List<List<? extends Shape>> preRenderedFrames = new ArrayList<>();
 
     int numFrames = (int) (Float.parseFloat(args[1]) * TARGET_FRAMERATE);
 
-
+    long start = System.currentTimeMillis();
 
     for (int i = 0; i < numFrames; i++) {
-      preRenderedFrames.add(Shapes.sortLines(camera.draw(object)));
-      object.rotate(rotation);
+      preRenderedFrames.add(new ArrayList<>());
     }
 
+    IntStream.range(0, numFrames).parallel().forEach((frameNum) -> {
+      WorldObject clone = object.clone();
+      clone.rotate(rotation.scale(frameNum));
+      preRenderedFrames.set(frameNum, Shapes.sortLines(camera.draw(clone)));
+    });
+
+    System.out.println(System.currentTimeMillis() - start);
+
     AudioPlayer player = new AudioPlayer(SAMPLE_RATE, preRenderedFrames);
     //AudioPlayer.setRotateSpeed(1);
     //AudioPlayer.setTranslation(1, new Vector2(1, 1));

src/audio/AudioPlayer.java

@@ -136,7 +136,7 @@ public class AudioPlayer extends Thread {
   }
 
   private static Shape getCurrentShape() {
-    if (frames.size() == 0) {
+    if (frames.size() == 0 || frames.get(currentFrame).size() == 0) {
       return new Vector2(0, 0);
     }
 

src/engine/Vector3.java

@@ -84,4 +84,8 @@ public final class Vector3 {
 
     return mean.scale(1f / (points.size()));
   }
+
+  public Vector3 clone() {
+    return new Vector3(x, y, z);
+  }
 }

src/engine/WorldObject.java

@@ -23,10 +23,21 @@ public class WorldObject {
     loadFromFile(filename);
   }
 
+  public WorldObject(List<Vector3> vertices, List<Integer> edgeData, Vector3 position, Vector3 rotation) {
+    this.vertices = vertices;
+    this.edgeData = edgeData;
+    this.position = position;
+    this.rotation = rotation;
+  }
+
   public void rotate(Vector3 theta) {
     rotation = rotation.add(theta);
   }
 
+  public void resetRotation() {
+    rotation = new Vector3();
+  }
+
   public List<Vector3> getVertices() {
     List<Vector3> newVertices = new ArrayList<>();
 
@@ -67,4 +78,20 @@ public class WorldObject {
       throw new IllegalArgumentException("Cannot load mesh data from: " + filename);
     }
   }
+
+  public WorldObject clone() {
+    List<Vector3> newVertices = new ArrayList<>();
+
+    for (Vector3 vertex : vertices) {
+      newVertices.add(vertex.clone());
+    }
+
+    List<Integer> newEdgeData = new ArrayList<>();
+
+    for (int edge : edgeData) {
+      newEdgeData.add(edge);
+    }
+
+    return new WorldObject(newVertices, newEdgeData, position.clone(), rotation.clone());
+  }
 }