feat: basic player entity

4 files changed, 136 insertions, 2 deletions

diff --git a/core/src/main/java/kz/ilotterytea/frogartha/entities/Entity.java b/core/src/main/java/kz/ilotterytea/frogartha/entities/Entity.java
new file mode 100644
index 0000000..f8a7ce5
--- /dev/null
+++ b/core/src/main/java/kz/ilotterytea/frogartha/entities/Entity.java
@@ -0,0 +1,4 @@
+package kz.ilotterytea.frogartha.entities;
+
+public abstract class Entity {
+}
diff --git a/core/src/main/java/kz/ilotterytea/frogartha/entities/PlayerEntity.java b/core/src/main/java/kz/ilotterytea/frogartha/entities/PlayerEntity.java
new file mode 100644
index 0000000..da100fa
--- /dev/null
+++ b/core/src/main/java/kz/ilotterytea/frogartha/entities/PlayerEntity.java
@@ -0,0 +1,71 @@
+package kz.ilotterytea.frogartha.entities;
+
+import com.badlogic.gdx.Gdx;
+import com.badlogic.gdx.Input;
+import com.badlogic.gdx.graphics.Camera;
+import com.badlogic.gdx.graphics.Texture;
+import com.badlogic.gdx.math.Vector3;
+import com.badlogic.gdx.math.collision.Ray;
+
+public class PlayerEntity extends RenderableEntity {
+    private final Camera camera;
+    private final float velocity;
+
+    public PlayerEntity(Camera camera) {
+        super(new Texture(Gdx.files.internal("sprites/player/player.png")));
+        this.camera = camera;
+        this.velocity = 8f;
+        setCameraPosition();
+    }
+
+    @Override
+    public void update(float delta) {
+        updatePlayerPosition();
+        updatePlayerLook();
+    }
+
+    @Override
+    public void setPosition(float x, float y, float z) {
+        super.setPosition(x, y, z);
+        setCameraPosition();
+    }
+
+    private void updatePlayerPosition() {
+        float xMovement = 0f, zMovement = 0f;
+
+        if (Gdx.input.isKeyPressed(Input.Keys.W)) {
+            xMovement = -1f;
+        } else if (Gdx.input.isKeyPressed(Input.Keys.S)) {
+            xMovement = 1f;
+        }
+
+        if (Gdx.input.isKeyPressed(Input.Keys.A)) {
+            zMovement = 1f;
+        } else if (Gdx.input.isKeyPressed(Input.Keys.D)) {
+            zMovement = -1f;
+        }
+
+        xMovement *= velocity / 100f;
+        zMovement *= velocity / 100f;
+
+        setPosition(position.x + xMovement, position.y, position.z + zMovement);
+
+        if (xMovement != 0f || zMovement != 0f) setCameraPosition();
+    }
+
+    private void updatePlayerLook() {
+        // cv pasted from https://stackoverflow.com/a/18552800
+        Ray ray = camera.getPickRay(Gdx.input.getX(), Gdx.input.getY());
+        final float distance = -ray.origin.y / ray.direction.y;
+        Vector3 point = new Vector3(ray.direction).scl(distance).add(ray.origin);
+        super.setDirection(point.x, 1f, point.z);
+    }
+
+    private void setCameraPosition() {
+        float zoomScale = 4f;
+
+        this.camera.position.set(position.x + zoomScale, position.y + zoomScale / 2f, position.z);
+        this.camera.lookAt(position);
+        this.camera.update();
+    }
+}
diff --git a/core/src/main/java/kz/ilotterytea/frogartha/entities/RenderableEntity.java b/core/src/main/java/kz/ilotterytea/frogartha/entities/RenderableEntity.java
new file mode 100644
index 0000000..39cc866
--- /dev/null
+++ b/core/src/main/java/kz/ilotterytea/frogartha/entities/RenderableEntity.java
@@ -0,0 +1,52 @@
+package kz.ilotterytea.frogartha.entities;
+
+import com.badlogic.gdx.graphics.Texture;
+import com.badlogic.gdx.graphics.g2d.TextureRegion;
+import com.badlogic.gdx.graphics.g3d.decals.Decal;
+import com.badlogic.gdx.graphics.g3d.decals.DecalBatch;
+import com.badlogic.gdx.math.Vector3;
+import com.badlogic.gdx.math.collision.BoundingBox;
+
+public abstract class RenderableEntity extends Entity {
+    protected final Vector3 position, direction;
+    protected final Decal decal;
+    protected final BoundingBox boundingBox;
+
+    public RenderableEntity(Texture texture) {
+        this.decal = Decal.newDecal(1f, 1f, new TextureRegion(texture), true);
+        this.boundingBox = new BoundingBox();
+        this.position = new Vector3();
+        this.direction = new Vector3();
+    }
+
+    public void render(DecalBatch decalBatch) {
+        decalBatch.add(decal);
+    }
+
+    public Vector3 getPosition() {
+        return position;
+    }
+
+    public void setPosition(float x, float y, float z) {
+        position.set(x, y, z);
+        decal.setPosition(position);
+
+        float xSize = 2.5f, ySize = 1f;
+
+        boundingBox.set(
+            new Vector3(position.x - xSize, position.y, position.z - xSize),
+            new Vector3(position.x + xSize, position.y + ySize, xSize + 2.5f)
+        );
+    }
+
+    public Vector3 getDirection() {
+        return direction;
+    }
+
+    public void setDirection(float x, float y, float z) {
+        direction.set(x, y, z);
+        decal.lookAt(direction, Vector3.Y);
+    }
+
+    public abstract void update(float delta);
+}
diff --git a/core/src/main/java/kz/ilotterytea/frogartha/screens/GameScreen.java b/core/src/main/java/kz/ilotterytea/frogartha/screens/GameScreen.java
index 509566e..d8f9b36 100644
--- a/core/src/main/java/kz/ilotterytea/frogartha/screens/GameScreen.java
+++ b/core/src/main/java/kz/ilotterytea/frogartha/screens/GameScreen.java
@@ -11,6 +11,7 @@ import com.badlogic.gdx.graphics.g3d.decals.CameraGroupStrategy;
 import com.badlogic.gdx.graphics.g3d.decals.DecalBatch;
 import com.badlogic.gdx.graphics.g3d.utils.ModelBuilder;
 import com.badlogic.gdx.math.Vector3;
+import kz.ilotterytea.frogartha.entities.PlayerEntity;
 import net.mgsx.gltf.scene3d.attributes.PBRCubemapAttribute;
 import net.mgsx.gltf.scene3d.attributes.PBRTextureAttribute;
 import net.mgsx.gltf.scene3d.lights.DirectionalShadowLight;
@@ -25,9 +26,14 @@ public class GameScreen implements Screen {
     private SceneManager sceneManager;
     private DecalBatch decalBatch;
 
+    private PlayerEntity playerEntity;
+
     @Override
     public void show() {
         create3D();
+
+        playerEntity = new PlayerEntity(camera);
+        playerEntity.setPosition(0f, 1f, 0f);
     }
 
     @Override
@@ -36,6 +42,9 @@ public class GameScreen implements Screen {
         sceneManager.update(delta);
         sceneManager.render();
 
+        playerEntity.update(delta);
+        playerEntity.render(decalBatch);
+
         decalBatch.flush();
     }
 
@@ -78,8 +87,6 @@ public class GameScreen implements Screen {
         camera = new PerspectiveCamera(60f, Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
         camera.near = 1f;
         camera.far = 300f;
-        camera.position.set(0f, 8f, 15f);
-        camera.lookAt(planeScene.modelInstance.transform.getTranslation(new Vector3()));
         camera.update();
 
         sceneManager.setCamera(camera);