add gfx/animations/SpriteAnimation

1 files changed, 89 insertions, 0 deletions

diff --git a/core/src/ch/asynk/tankontank/engine/gfx/animations/SpriteAnimation.java b/core/src/ch/asynk/tankontank/engine/gfx/animations/SpriteAnimation.java
new file mode 100644
index 0000000..ee498b3
--- /dev/null
+++ b/core/src/ch/asynk/tankontank/engine/gfx/animations/SpriteAnimation.java
@@ -0,0 +1,89 @@
+package ch.asynk.tankontank.engine.gfx.animations;
+
+import java.util.Random;
+
+import com.badlogic.gdx.utils.Disposable;
+
+import com.badlogic.gdx.graphics.Texture;
+import com.badlogic.gdx.graphics.g2d.Batch;
+import com.badlogic.gdx.graphics.g2d.TextureRegion;
+import com.badlogic.gdx.graphics.glutils.ShapeRenderer;
+
+import ch.asynk.tankontank.engine.gfx.Drawable;
+import ch.asynk.tankontank.engine.gfx.Animation;
+
+public class SpriteAnimation implements Disposable, Animation
+{
+    private static Random random = new Random();
+    private Texture texture;
+    private TextureRegion[] frames;
+    private float duration;
+    private float frameDuration;
+    private float elapsed;
+    private float x0;
+    private float y0;
+    private float x1;
+    private float y1;
+    private int w;
+    private int h;
+    private int randFreq;
+
+    public SpriteAnimation(Texture texture, int cols, int rows, int randFreq)
+    {
+        this.texture = texture;
+        this.randFreq = randFreq;
+        this.w = (texture.getWidth() / cols);
+        this.h = (texture.getHeight() / rows);
+        TextureRegion[][] tmp = TextureRegion.split(texture, w, h);
+        this.frames = new TextureRegion[cols * rows];
+        int idx = 0;
+        for (int i = 0; i < rows; i++) {
+            for (int j = 0; j < cols; j++) {
+                this.frames[idx++] = tmp[i][j];
+            }
+        }
+    }
+
+    @Override
+    public void dispose()
+    {
+        this.texture.dispose();
+    }
+
+    public void init(float duration, float x, float y)
+    {
+        this.duration = duration;
+        this.frameDuration = (duration / (float) frames.length);
+        this.x0 = x - (w/ 2);
+        this.y0 = y - (h / 2);
+        this.elapsed = 0f;
+        randPos();
+    }
+
+    private void randPos()
+    {
+        this.x1 = this.x0 + (random.nextInt(w / 1) - (w / 2));
+        this.y1 = this.y0 + (random.nextInt(h / 1) - (h / 2));
+    }
+
+    @Override
+    public boolean animate(float delta)
+    {
+        elapsed += delta;
+        return (elapsed >= duration);
+    }
+
+    @Override
+    public void draw(Batch batch)
+    {
+        int n = (((int)(elapsed / frameDuration)) % frames.length);
+        if ((n > 0) && (n % randFreq) == 0)
+            randPos();
+        batch.draw(frames[n], x1, y1, w, h);
+    }
+
+    @Override
+    public void drawDebug(ShapeRenderer debugShapes)
+    {
+    }
+}