Reimplement updating focal length and camera position

src/main/java/sh/ball/FrameSet.java

@@ -2,4 +2,5 @@ package sh.ball;
 
 public interface FrameSet<T> {
   T next();
+  void setFrameSettings(Object settings);
 }

src/main/java/sh/ball/audio/FrameProducer.java

@@ -9,14 +9,14 @@ import sh.ball.parser.FileParser;
 
 import javax.xml.parsers.ParserConfigurationException;
 
-public class FrameProducer<T> implements Runnable {
+public class FrameProducer<S> implements Runnable {
 
-  private final Renderer<T> renderer;
-  private final FrameSet<T> frames;
+  private final Renderer<S> renderer;
+  private final FrameSet<S> frames;
 
   private boolean running;
 
-  public FrameProducer(Renderer<T> renderer, FileParser<FrameSet<T>> parser) throws IOException, SAXException, ParserConfigurationException {
+  public FrameProducer(Renderer<S> renderer, FileParser<FrameSet<S>> parser) throws IOException, SAXException, ParserConfigurationException {
     this.renderer = renderer;
     this.frames = parser.parse();
   }
@@ -32,4 +32,8 @@ public class FrameProducer<T> implements Runnable {
   public void stop() {
     running = false;
   }
+
+  public void setFrameSettings(Object settings) {
+    frames.setFrameSettings(settings);
+  }
 }

src/main/java/sh/ball/engine/Camera.java

@@ -127,4 +127,8 @@ public class Camera {
   public void setFocalLength(double focalLength) {
     this.focalLength = focalLength;
   }
+
+  public double getFocalLength() {
+    return focalLength;
+  }
 }

src/main/java/sh/ball/gui/Controller.java

@@ -5,7 +5,6 @@ import sh.ball.audio.AudioPlayer;
 import sh.ball.audio.FrameProducer;
 
 import java.io.File;
-import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.net.URL;
 import java.util.List;
@@ -28,6 +27,8 @@ import javafx.stage.Stage;
 import javax.xml.parsers.ParserConfigurationException;
 
 import org.xml.sax.SAXException;
+import sh.ball.engine.Vector3;
+import sh.ball.parser.obj.ObjFrameSettings;
 import sh.ball.parser.obj.ObjParser;
 import sh.ball.parser.ParserFactory;
 import sh.ball.parser.txt.TextParser;
@@ -44,7 +45,7 @@ public class Controller implements Initializable {
 
   private FrameProducer<List<Shape>> producer = new FrameProducer<>(
     renderer,
-    ParserFactory.getParser(DEFAULT_FILE).orElseThrow(FileNotFoundException::new)
+    ParserFactory.getParser(DEFAULT_FILE)
   );
 
   private Stage stage;
@@ -98,9 +99,9 @@ public class Controller implements Initializable {
       translationSpeedSlider,
       new SliderUpdater<>(translationSpeedLabel::setText, renderer::setTranslationSpeed),
       scaleSlider,
-      new SliderUpdater<>(scaleLabel::setText, renderer::setScale)
-//      focalLengthSlider,
-//      new SliderUpdater<>(focalLengthLabel::setText, producer::setFocalLength)
+      new SliderUpdater<>(scaleLabel::setText, renderer::setScale),
+      focalLengthSlider,
+      new SliderUpdater<>(focalLengthLabel::setText, this::setFocalLength)
     );
   }
 
@@ -123,29 +124,32 @@ public class Controller implements Initializable {
     translationXTextField.textProperty().addListener(translationUpdate);
     translationYTextField.textProperty().addListener(translationUpdate);
 
-//    InvalidationListener cameraPosUpdate = observable ->
-//      producer.setCameraPos(new Vector3(
-//        tryParse(cameraXTextField.getText()),
-//        tryParse(cameraYTextField.getText()),
-//        tryParse(cameraZTextField.getText())
-//      ));
-//
-//    cameraXTextField.textProperty().addListener(cameraPosUpdate);
-//    cameraYTextField.textProperty().addListener(cameraPosUpdate);
-//    cameraZTextField.textProperty().addListener(cameraPosUpdate);
+    InvalidationListener cameraPosUpdate = observable ->
+      producer.setFrameSettings(new ObjFrameSettings(new Vector3(
+        tryParse(cameraXTextField.getText()),
+        tryParse(cameraYTextField.getText()),
+        tryParse(cameraZTextField.getText())
+      )));
+
+    cameraXTextField.textProperty().addListener(cameraPosUpdate);
+    cameraYTextField.textProperty().addListener(cameraPosUpdate);
+    cameraZTextField.textProperty().addListener(cameraPosUpdate);
 
     chooseFileButton.setOnAction(e -> {
-      File file = null;
-      while (file == null) {
-        file = fileChooser.showOpenDialog(stage);
+      File file = fileChooser.showOpenDialog(stage);
+      if (file != null) {
+        chooseFile(file);
       }
-      chooseFile(file);
     });
 
     executor.submit(producer);
     new Thread(renderer).start();
   }
 
+  private void setFocalLength(double focalLength) {
+    producer.setFrameSettings(new ObjFrameSettings(focalLength));
+  }
+
   private double tryParse(String value) {
     try {
       return Double.parseDouble(value);
@@ -161,7 +165,6 @@ public class Controller implements Initializable {
       producer = new FrameProducer<>(
         renderer,
         ParserFactory.getParser(path)
-          .orElseThrow(FileNotFoundException::new)
       );
       executor.submit(producer);
 

src/main/java/sh/ball/parser/ParserFactory.java

@@ -8,21 +8,21 @@ import sh.ball.parser.txt.TextParser;
 import sh.ball.shapes.Shape;
 
 import javax.xml.parsers.ParserConfigurationException;
+import java.io.File;
 import java.io.IOException;
 import java.util.List;
-import java.util.Optional;
 
 public class ParserFactory {
 
-  public static Optional<FileParser<FrameSet<List<Shape>>>> getParser(String filePath) throws IOException, ParserConfigurationException, SAXException {
+  public static FileParser<FrameSet<List<Shape>>> getParser(String filePath) throws IOException, ParserConfigurationException, SAXException {
     if (ObjParser.isObjFile(filePath)) {
-      return Optional.of(new ObjParser(filePath, 1));
+      return new ObjParser(filePath, 1);
     } else if (SvgParser.isSvgFile(filePath)) {
-      return Optional.of(new SvgParser(filePath));
+      return new SvgParser(filePath);
     } else if (TextParser.isTxtFile(filePath)) {
-      return Optional.of(new TextParser(filePath));
+      return new TextParser(filePath);
     }
-    return Optional.empty();
+    throw new IOException("No known parser that can parse " + new File(filePath).getName());
   }
 
 }

src/main/java/sh/ball/parser/ShapeFrameSet.java

@@ -17,4 +17,7 @@ public class ShapeFrameSet implements FrameSet<List<Shape>> {
   public List<Shape> next() {
     return shapes;
   }
+
+  @Override
+  public void setFrameSettings(Object settings) {}
 }

src/main/java/sh/ball/parser/obj/ObjFrameSet.java

@@ -13,11 +13,13 @@ public class ObjFrameSet implements FrameSet<List<Shape>> {
   private final WorldObject object;
   private final Camera camera;
   private final Vector3 rotation;
+  private final boolean isDefaultPosition;
 
-  public ObjFrameSet(WorldObject object, Camera camera, Vector3 rotation) {
+  public ObjFrameSet(WorldObject object, Camera camera, Vector3 rotation, boolean isDefaultPosition) {
     this.object = object;
     this.camera = camera;
     this.rotation = rotation;
+    this.isDefaultPosition = isDefaultPosition;
   }
 
   @Override
@@ -25,4 +27,22 @@ public class ObjFrameSet implements FrameSet<List<Shape>> {
     object.rotate(rotation);
     return camera.draw(object);
   }
+
+  @Override
+  public void setFrameSettings(Object settings) {
+    if (settings instanceof ObjFrameSettings obj) {
+      Double focalLength = obj.focalLength();
+      Vector3 cameraPos = obj.cameraPos();
+
+      if (focalLength != null && camera.getFocalLength() != focalLength) {
+        camera.setFocalLength(focalLength);
+        if (isDefaultPosition) {
+          camera.findZPos(object);
+        }
+      }
+      if (cameraPos != null && camera.getPos() != cameraPos) {
+        camera.setPos(cameraPos);
+      }
+    }
+  }
 }

src/main/java/sh/ball/parser/obj/ObjFrameSettings.java

@@ -0,0 +1,14 @@
+package sh.ball.parser.obj;
+
+import sh.ball.engine.Vector3;
+
+public record ObjFrameSettings(Double focalLength, Vector3 cameraPos) {
+
+  public ObjFrameSettings(double focalLength) {
+    this(focalLength, null);
+  }
+
+  public ObjFrameSettings(Vector3 cameraPos) {
+    this(null, cameraPos);
+  }
+}

src/main/java/sh/ball/parser/obj/ObjParser.java

@@ -49,7 +49,7 @@ public class ObjParser extends FileParser<FrameSet<List<Shape>>> {
       camera.findZPos(object);
     }
 
-    return new ObjFrameSet(object, camera, rotation);
+    return new ObjFrameSet(object, camera, rotation, isDefaultPosition);
   }
 
   @Override