From fe6bd866326433c9d8e3b1c6d6f194eaffcb4d54 Mon Sep 17 00:00:00 2001
From: Recrown <yunyangdeng@gmail.com>
Date: Wed, 14 Jun 2017 00:16:24 -0500
Subject: [PATCH] minor progress on background shader

---
 android/assets/shaders/star_frag.glsl               | 13 ++++---------
 android/assets/shaders/star_vert.glsl               |  3 ---
 core/src/zero1hd/polyjet/Polyjet.java               |  2 ++
 .../src/zero1hd/polyjet/ui/stages/GamePlayArea.java |  5 +----
 4 files changed, 7 insertions(+), 16 deletions(-)

diff --git a/android/assets/shaders/star_frag.glsl b/android/assets/shaders/star_frag.glsl
index cbdb571..f2cafbc 100755
--- a/android/assets/shaders/star_frag.glsl
+++ b/android/assets/shaders/star_frag.glsl
@@ -1,8 +1,8 @@
 #extension GL_OES_standard_derivatives : enable
 
 varying float vTime;
-varying vec2 vResolution;
 #define M_PI 3.1415926535897932384626433832795
+varying vec2 vTexCoord;
 
 //#define vTime (vTime * vTime * 0.05)
 
@@ -42,10 +42,7 @@ float stars(in vec2 x, float numCells, float size, float br)
 
 void main()
 {
-
-	float res  = max(vResolution.y, vResolution.y);
-
-    vec2 coord = gl_FragCoord.xy / vResolution;
+    vec2 coord = vTexCoord;
 
 	vec2 tmp = coord;
 
@@ -64,7 +61,8 @@ void main()
 
 
 
-	gl_FragColor = vec4(result,1.);
+	gl_FragColor = vec4(result, 1.0);
+//    gl_FragColor = vec4(1.0*(vTexCoord.x/vResolution.x), 0.0, 0.0, 1.0);
 
 
 
@@ -72,7 +70,4 @@ void main()
     // vec2 bl = gl_FragCoord.xy / vResolution.xy;
 
     // if(bl.y>.50-min(vTime/20.,0.4) ^^ bl.y<0.50+min(vTime/20.0,.4))  gl_FragColor  = vec4(0.0,sqrt(coord.y+0.1),0.3,1.0);
-
-
-
 }
diff --git a/android/assets/shaders/star_vert.glsl b/android/assets/shaders/star_vert.glsl
index 0ff9b1c..4880758 100755
--- a/android/assets/shaders/star_vert.glsl
+++ b/android/assets/shaders/star_vert.glsl
@@ -4,17 +4,14 @@ attribute vec2 a_texCoord0;
 
 uniform mat4 u_projTrans;
 uniform float time;
-uniform vec2 resolution;
 
 varying vec4 vColor;
 varying vec2 vTexCoord;
 varying float vTime;
-varying vec2 vResolution;
 void main() {
 	vColor = a_color;
 	vTexCoord = a_texCoord0;
 	vTime = time;
-	vResolution = resolution;
 
 	gl_Position = u_projTrans * a_position;
 }
diff --git a/core/src/zero1hd/polyjet/Polyjet.java b/core/src/zero1hd/polyjet/Polyjet.java
index 328f995..33846af 100755
--- a/core/src/zero1hd/polyjet/Polyjet.java
+++ b/core/src/zero1hd/polyjet/Polyjet.java
@@ -128,6 +128,8 @@ public class Polyjet extends Game {
 		assetManager.load("shard.png", Texture.class);
 		assetManager.load("bar.png", Texture.class);
 		assetManager.load("flake.png", Texture.class);
+		assetManager.load("star_bg.png", Texture.class);
+//		assetManager.load("");
 	}
 	public void generateFonts() {
 		initComplete = true;
diff --git a/core/src/zero1hd/polyjet/ui/stages/GamePlayArea.java b/core/src/zero1hd/polyjet/ui/stages/GamePlayArea.java
index b3f4dab..eb70719 100755
--- a/core/src/zero1hd/polyjet/ui/stages/GamePlayArea.java
+++ b/core/src/zero1hd/polyjet/ui/stages/GamePlayArea.java
@@ -32,8 +32,6 @@ public class GamePlayArea extends Stage {
 	private ShaderProgram invert;
 	private ShaderProgram bgShader;
 	
-	private Vector2 resolution;
-	
 	private float timePassed;
 	
 	private Texture background;
@@ -83,7 +81,6 @@ public class GamePlayArea extends Stage {
 			if (bgShader.getLog().length()!=0) {
 				System.out.println(bgShader.getLog());
 			}
-			resolution = new Vector2(Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
 		} else {
 			//TODO prepare background rendering without shader
 		}
@@ -110,8 +107,8 @@ public class GamePlayArea extends Stage {
 		if (bgShader != null) {
 			timePassed += delta;
 			bgShader.setUniformf("time", timePassed);
-			bgShader.setUniformf("resolution", resolution);
 		}
+		
 		collisionDetector.collisionCheck();
 		ec.deathClean();