Added capabilities for multiple light sources

core/assets/Fragment.frag

@@ -1,22 +1,43 @@
+#version 410 core
 //SpriteBatch will use texture unit 0
 uniform sampler2D u_texture;
 uniform vec2 u_screenResolution;
+uniform vec2 u_lightCoord[50];
+uniform float u_lightIntensity[50];
+uniform int u_actualLights;
 
 //"in" varyings from our vertex shader
 varying vec4 vColor;
 varying vec2 vTexCoord;
+
+float getDistance(float x1, float y1, float x2, float y2){
+	float dx = x2 - x1;
+	float dy = y2 - y1;
+	float dis = sqrt(dx * dx + dy * dy);
+	return dis;
+}
 void main() {
+
+
+
    //sample the texture
    vec4 texColor = texture2D(u_texture, vTexCoord);
-   float dx = u_screenResolution.x / 2.0 - gl_FragCoord.x;
-   float dy = u_screenResolution.y / 2.0 - gl_FragCoord.y;
-   float dxi = u_screenResolution.x / 2.0;
-   float dyi = u_screenResolution.y / 2.0;
-   float dis = sqrt(dx * dx + dy * dy);
-   float disFull = sqrt(dxi * dxi + dyi * dyi);
+ 
+   float dis = getDistance(u_screenResolution.x / 2.0, u_screenResolution.y / 2.0, gl_FragCoord.x, gl_FragCoord.y);
+   float disFull = getDistance(u_screenResolution.x / 2.0, u_screenResolution.y / 2.0, 0, 0);
    float disSq = (1-(dis / disFull));
-   texColor.rgb = texColor.rgb * disSq * disSq * disSq * disSq * disSq;
+   
+   
+   //Distance is measured in pixels
+   
 
+   float brightest = 0;
+   for(int i = 0;i < u_actualLights;i++){
+   	float dis2Light = getDistance(gl_FragCoord.x, gl_FragCoord.y, u_lightCoord[i].x, u_lightCoord[i].y);
+   	float dis2Light2 = (1-(min(dis2Light/(disFull * u_lightIntensity[i]), 1)));
+   	brightest = brightest + dis2Light2 - brightest * dis2Light2;
+   }
+   texColor.rgb = texColor.rgb * (pow(brightest, 10));
    //final color
    gl_FragColor = texColor * vColor;
-}
+}

core/assets/testmap.tmx

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<map version="1.0" orientation="orthogonal" renderorder="right-up" width="50" height="50" tilewidth="16" tileheight="16" nextobjectid="66">
+<map version="1.0" orientation="orthogonal" renderorder="right-up" width="50" height="50" tilewidth="16" tileheight="16" nextobjectid="78">
  <tileset firstgid="1" name="env" tilewidth="16" tileheight="16" tilecount="64" columns="8">
   <image source="env.png" width="128" height="128"/>
  </tileset>
@@ -112,4 +112,18 @@
   <object id="63" x="608" y="352" width="192" height="40"/>
   <object id="65" x="608" y="240" width="48" height="112"/>
  </objectgroup>
+ <objectgroup name="lights">
+  <object id="66" x="384" y="624"/>
+  <object id="67" x="576" y="624"/>
+  <object id="68" x="576" y="752"/>
+  <object id="69" x="384" y="752"/>
+  <object id="70" x="512" y="544"/>
+  <object id="71" x="512" y="416"/>
+  <object id="72" x="784" y="416"/>
+  <object id="73" x="784" y="768"/>
+  <object id="74" x="640" y="768"/>
+  <object id="75" x="384" y="336"/>
+  <object id="76" x="352" y="304"/>
+  <object id="77" x="416" y="304"/>
+ </objectgroup>
 </map>

core/src/com/toasted/chuck/ChuckGame.java

@@ -12,10 +12,10 @@ import com.badlogic.gdx.maps.MapLayer;
 import com.badlogic.gdx.maps.MapObject;
 import com.badlogic.gdx.maps.objects.RectangleMapObject;
 import com.badlogic.gdx.maps.tiled.TiledMap;
-import com.badlogic.gdx.maps.tiled.TiledMapRenderer;
 import com.badlogic.gdx.maps.tiled.TmxMapLoader;
 import com.badlogic.gdx.maps.tiled.renderers.OrthogonalTiledMapRenderer;
 import com.badlogic.gdx.math.Rectangle;
+import com.badlogic.gdx.math.Vector2;
 
 public class ChuckGame extends ApplicationAdapter implements InputProcessor{
 	Graphics graphics;
@@ -25,6 +25,8 @@ public class ChuckGame extends ApplicationAdapter implements InputProcessor{
 	TiledMap tiledMap;
 	OrthogonalTiledMapRenderer tmRenderer;
 	ArrayList<Rectangle> collisions = new ArrayList<Rectangle>();
+	ArrayList<Light> lights = new ArrayList<Light>();
+	Light playerLight;
 	@Override
 	public void create () {
 		Gdx.input.setInputProcessor(this);
@@ -43,6 +45,9 @@ public class ChuckGame extends ApplicationAdapter implements InputProcessor{
 		};
 		tiledMap = new TmxMapLoader().load("testmap.tmx");
 		tmRenderer = new OrthogonalTiledMapRenderer(tiledMap, graphics.getBatch());
+		playerLight = new Light(8, 8, 1);
+		lights.add(playerLight);
+		lights.add(new Light( 100, 100, .3f));
 		
 		MapLayer ml = tiledMap.getLayers().get("collisions");
 		for(MapObject o: ml.getObjects()){
@@ -51,7 +56,14 @@ public class ChuckGame extends ApplicationAdapter implements InputProcessor{
 			collisions.add(r);
 			
 		}
-		
+		MapLayer lightLayer = tiledMap.getLayers().get("lights");
+		Vector2 t = new Vector2();
+		for(MapObject o: lightLayer.getObjects()){
+			RectangleMapObject rmo = (RectangleMapObject) o;
+			t = new Rectangle(rmo.getRectangle()).getCenter(t);
+			lights.add(new Light(t.x, t.y, .3f));
+			
+		}
 		
 		
 	}
@@ -59,13 +71,13 @@ public class ChuckGame extends ApplicationAdapter implements InputProcessor{
 	@Override
 	public void render () {
 		
-//		player.update(Gdx.graphics.getDeltaTime(), entities);
 		for(Entity e: entities){
 			e.update(Gdx.graphics.getDeltaTime(), entities, collisions);
 		}
 		Collections.sort(entities, zSorter);
+		playerLight.position.x = player.position.x + 8;
+		playerLight.position.y = player.position.y + 8;
 		
-//		graphics.cam.lookAt(player.position.x, player.position.y, 0);
 		graphics.cam.position.x =  player.position.x + 8;
 		graphics.cam.position.y = player.position.y + 8;
 		
@@ -73,21 +85,20 @@ public class ChuckGame extends ApplicationAdapter implements InputProcessor{
 		
 
 		graphics.prepare();
+		graphics.passLightsToShader(lights);
 		Gdx.gl.glClearColor(0, 0, 0, 1);
 		Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
 		
 		tmRenderer.setView(graphics.cam);
 		tmRenderer.render();
 		graphics.startSprite();
-//		tmRenderer.getBatch().setShader(graphics.shader);
 		
-//		player.draw(graphics);
 		for(Entity e: entities){
 			if(e.shouldDrawSelf)
 				e.draw(graphics);
 		}
 		graphics.endSprite();
-//		graphics.endShapes();
+		System.out.println("FPS:" + Gdx.graphics.getFramesPerSecond());
 	}
 	
 	@Override

core/src/com/toasted/chuck/Graphics.java

@@ -1,5 +1,7 @@
 package com.toasted.chuck;
 
+import java.util.ArrayList;
+
 import com.badlogic.gdx.Gdx;
 import com.badlogic.gdx.files.FileHandle;
 import com.badlogic.gdx.graphics.OrthographicCamera;
@@ -8,6 +10,7 @@ import com.badlogic.gdx.graphics.glutils.ShaderProgram;
 import com.badlogic.gdx.graphics.glutils.ShapeRenderer;
 import com.badlogic.gdx.graphics.glutils.ShapeRenderer.ShapeType;
 import com.badlogic.gdx.math.Vector2;
+import com.badlogic.gdx.math.Vector3;
 
 public class Graphics {
 	private SpriteBatch spriteBatch;
@@ -16,14 +19,18 @@ public class Graphics {
 	
 	final FileHandle VERTEX = Gdx.files.internal("Vertex.vert");
     final FileHandle FRAGMENT = Gdx.files.internal("Fragment.frag");
-
+    final int orthoX = 16 * 28;
+    final int orthoY = 9  * 28;
+    final float orthoScale = orthoX / (float)getWidth();
+    
+    
     ShaderProgram shader = new ShaderProgram(VERTEX, FRAGMENT);
 	public Graphics(){
 		cam = new OrthographicCamera();
 		spriteBatch = new SpriteBatch();
 		shapeRenderer = new ShapeRenderer();
 		
-		cam.setToOrtho(false, 16 * 28, 9 * 28);
+		cam.setToOrtho(false, orthoX, orthoY);
 		
 	}
 	public int getWidth(){
@@ -32,6 +39,7 @@ public class Graphics {
 	public int getHeight(){
 		return Gdx.graphics.getHeight();
 	}
+	
 	public void startShapes(ShapeType shapeType){
 		shapeRenderer.begin(shapeType);
 	}
@@ -54,18 +62,30 @@ public class Graphics {
 		shapeRenderer.setProjectionMatrix(cam.combined);
 		spriteBatch.setProjectionMatrix(cam.combined);
 		
-		System.out.println(shader.getLog());
 		spriteBatch.setShader(shader);
-		System.out.println(shader.getUniforms());
-//		for(String s: shader.getUniforms()){
-//			System.out.println(s);
-//		}
-//		System.out.println(shader.getFragmentShaderSource());
-//		shader.begin();
-		shader.begin();
 		
-//		shader.setUniform2fv("u_resolution", new float[]{(float) getWidth(),  (float) getHeight()}, 0, 2);
+		if(!shader.isCompiled()){
+			System.err.println(shader.getLog());
+		}
+		
+		shader.begin();
 		shader.setUniformf("u_screenResolution", new Vector2(getWidth(), getHeight()));
 		
 	}
+	public void passLightsToShader(ArrayList<Light> lights){
+		if(lights.size() > 50){ // if there are too many to do
+			
+		} else {
+			shader.setUniformi("u_actualLights", lights.size());
+			int loc = shader.getUniformLocation("u_lightCoord[" + 0 + "]");
+			int locIn = shader.getUniformLocation("u_lightIntensity[0]");
+			for(int i = 0;i < lights.size();i++){
+				
+				Vector3 v3 = cam.project(new Vector3(lights.get(i).position.x, lights.get(i).position.y, 0));
+				Vector2 v = new Vector2(v3.x, v3.y);
+				shader.setUniformf(loc + i, v);
+				shader.setUniformf(locIn + i, lights.get(i).intensity);
+			}
+		}
+	}
 }

core/src/com/toasted/chuck/Light.java

@@ -0,0 +1,17 @@
+package com.toasted.chuck;
+
+import com.badlogic.gdx.math.Vector2;
+
+public class Light {
+	private static Vector2 tmp = new Vector2();
+	Vector2 position;
+	float intensity = 1;
+	public Light(float x, float y, float intensity){
+		position = new Vector2(x, y);
+		this.intensity = intensity;
+	}
+	public Vector2 getScreenPos(float cx, float cy){
+		return tmp.set(position).sub(cx, cy);
+	}
+	
+}