[libgdx] Minor cleanup & optimizations, timing code in ClipTest

spine-libgdx/spine-libgdx-tests/src/com/esotericsoftware/spine/ClippingTest.java

@@ -37,29 +37,36 @@ import com.badlogic.gdx.backends.lwjgl.LwjglApplication;
 import com.badlogic.gdx.backends.lwjgl.LwjglApplicationConfiguration;
 import com.badlogic.gdx.graphics.GL20;
 import com.badlogic.gdx.graphics.OrthographicCamera;
+import com.badlogic.gdx.graphics.g2d.BitmapFont;
+import com.badlogic.gdx.graphics.g2d.PolygonSpriteBatch;
 import com.badlogic.gdx.graphics.g2d.TextureAtlas;
+import com.badlogic.gdx.math.WindowedMean;
 import com.esotericsoftware.spine.attachments.ClippingAttachment;
 import com.esotericsoftware.spine.utils.TwoColorPolygonBatch;
 
 public class ClippingTest extends ApplicationAdapter {
 	OrthographicCamera camera;
-	TwoColorPolygonBatch batch;
+	PolygonSpriteBatch batch;
 	SkeletonRenderer renderer;
 	SkeletonRendererDebug debugRenderer;
+	BitmapFont font;
 
 	TextureAtlas atlas;
 	Skeleton skeleton;
 	AnimationState state;
+	
+	WindowedMean mean = new WindowedMean(30);	
 
 	public void create () {
 		camera = new OrthographicCamera();
-		batch = new TwoColorPolygonBatch(2048);
+		batch = new PolygonSpriteBatch(2048);
 		renderer = new SkeletonRenderer();
 		renderer.setPremultipliedAlpha(true);
 		renderer.setSoftwareClipping(true);
 		debugRenderer = new SkeletonRendererDebug();
 		debugRenderer.setBoundingBoxes(false);
 		debugRenderer.setRegionAttachments(false);
+		font = new BitmapFont();
 
 		atlas = new TextureAtlas(Gdx.files.internal("spineboy/spineboy-pma.atlas"));
 		SkeletonJson json = new SkeletonJson(atlas);
@@ -122,7 +129,11 @@ public class ClippingTest extends ApplicationAdapter {
 		debugRenderer.getShapeRenderer().setProjectionMatrix(camera.combined);
 
 		batch.begin();
+		long start = System.nanoTime();
 		renderer.draw(batch, skeleton);
+		mean.addValue((System.nanoTime() - start) / 1000000.0f);
+		renderer.setPremultipliedAlpha(false);
+		font.draw(batch, "Time: " + mean.getMean() + "ms", 10, Gdx.graphics.getHeight() - font.getLineHeight());
 		batch.end();
 
 		debugRenderer.draw(skeleton);

spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/SkeletonRenderer.java

@@ -444,9 +444,11 @@ public class SkeletonRenderer {
 				
 				float denom = 1 / (d0 * d2 + d1 * d3);
 				
-				for (int j = 0; j < clipOutput.size; j += 2) {				
-					float x = clipOutput.get(j);
-					float y = clipOutput.get(j + 1);
+				float[] clipVertices = clipOutput.items;
+				
+				for (int j = 0, n = clipOutput.size; j < n; j += 2) {				
+					float x = clipVertices[j];
+					float y = clipVertices[j + 1];
 						
 					float a = (d0 * (x - x3) + d1 * (y - y3)) * denom;
 					float b = (d4 * (x - x3) + d2 * (y - y3)) * denom;
@@ -462,7 +464,7 @@ public class SkeletonRenderer {
 					clippedVertices.add(v);
 				}
 				
-				for (int j = 1; j < (clipOutput.size >> 1) - 1; j++) {
+				for (int j = 1, n = (clipOutput.size >> 1) - 1; j < n; j++) {
 					clippedTriangles.add(idx);
 					clippedTriangles.add(idx + j);
 					clippedTriangles.add(idx + j + 1);

spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/utils/SutherlandHodgmanClipper.java

@@ -43,19 +43,14 @@ public class SutherlandHodgmanClipper {
 				edgeY2 = tmp;
 			}
 
-			// System.out.println("-- Edge " + i / 2 + ": (" + edgeX + ", " + edgeY + ")-(" + edgeX2 + ", " + edgeY2 + ")");
-			
 			for (int j = 0; j < input.size; j += 2) {
 				float inputX = input.items[j % input.size];
 				float inputY = input.items[(j + 1) % input.size];
 				float inputX2 = input.items[(j + 2) % input.size];
 				float inputY2 = input.items[(j + 3) % input.size];
 				
-				// System.out.println("\tinput " + j / 2 + ": (" + inputX + ", " + inputY + ")-(" + inputX2 + ", " + inputY2 + ")");
-				
 				int side = pointLineSide(edgeX2, edgeY2, edgeX, edgeY, inputX, inputY);
 				int side2 = pointLineSide(edgeX2, edgeY2, edgeX, edgeY, inputX2, inputY2);
-				// System.out.println("\tv1: " + (side < 0 ? "outside" : "inside" ) + ", v2: " + (side2 < 0 ? "outside" : "inside"));				
 				
 				// v1 inside, v2 inside
 				if (side >= 0 && side2 >= 0) {