background shader now functioning

core/src/zero1hd/polyjet/ui/stages/GamePlayArea.java

@@ -5,8 +5,8 @@ import com.badlogic.gdx.Preferences;
 import com.badlogic.gdx.assets.AssetManager;
 import com.badlogic.gdx.graphics.Texture;
 import com.badlogic.gdx.graphics.glutils.ShaderProgram;
-import com.badlogic.gdx.math.Vector2;
 import com.badlogic.gdx.scenes.scene2d.Stage;
+import com.badlogic.gdx.utils.TimeUtils;
 import com.badlogic.gdx.utils.viewport.FitViewport;
 
 import zero1hd.polyjet.Polyjet;
@@ -32,10 +32,10 @@ public class GamePlayArea extends Stage {
 	private ShaderProgram invert;
 	private ShaderProgram bgShader;
 	
-	private float timePassed;
-	
 	private Texture background;
 	
+	private float time;
+	
 	public GamePlayArea(AssetManager assetManager, Preferences prefs) {
 		super(new FitViewport(Polyjet.GAME_AREA_WIDTH, Polyjet.GAME_AREA_HEIGHT));
 		Gdx.app.debug("Game Area", "new area created");
@@ -81,6 +81,7 @@ public class GamePlayArea extends Stage {
 			if (bgShader.getLog().length()!=0) {
 				System.out.println(bgShader.getLog());
 			}
+			
 		} else {
 			//TODO prepare background rendering without shader
 		}
@@ -91,10 +92,13 @@ public class GamePlayArea extends Stage {
 	@Override
 	public void draw() {
 		//TODO batch draw background
+		getBatch().begin();
+		
 		if (bgShader != null) {
 			getBatch().setShader(bgShader);
+			bgShader.setUniformf("resolution", background.getWidth(), background.getHeight());
+			bgShader.setUniformf("time", time);
 		}
-		getBatch().begin();
 		getBatch().draw(background, 0f, 0f, Polyjet.GAME_AREA_WIDTH, Polyjet.GAME_AREA_HEIGHT);
 		getBatch().end();
 		
@@ -104,10 +108,7 @@ public class GamePlayArea extends Stage {
 	
 	@Override
 	public void act(float delta) {
-		if (bgShader != null) {
-			timePassed += delta;
-			bgShader.setUniformf("time", timePassed);
-		}
+		time = TimeUtils.millis()/10f;
 		
 		collisionDetector.collisionCheck();
 		ec.deathClean();