[DEV] tutorial 26 'light point' implementation

res/lamp.mtl

@@ -0,0 +1,11 @@
+# Blender MTL File: 'newLamp.blend'
+# Material Count: 1
+
+newmtl None
+Ns 0
+Ka 0.000000 0.000000 0.000000
+Kd 0.8 0.8 0.8
+Ks 0.8 0.8 0.8
+d 1
+illum 2
+map_Kd C:\Users\Karl\workspace\JGame\src\res\newLamp.png

src/engineTester/MainGameLoop.java

@@ -5,6 +5,7 @@ import java.util.ArrayList;
 import java.util.List;
 import java.util.Random;
 
+import org.atriaSoft.etk.math.Vector2f;
 import org.atriaSoft.etk.math.Vector3f;
 import org.lwjgl.openvr.Texture;
 
@@ -12,6 +13,8 @@ import entities.Camera;
 import entities.Entity;
 import entities.Light;
 import entities.Player;
+import guis.GuiRenderer;
+import guis.GuiTexture;
 import models.RawModel;
 import models.TexturedModel;
 import renderEngine.DisplayManager;
@@ -47,6 +50,8 @@ public class MainGameLoop {
 		Loader loader = new Loader();
 		manager.init();
 
+		List<Entity> entities = new ArrayList<Entity>();
+		Random random = new Random();
 
 		
 		TexturedModel staticModel = new TexturedModel(OBJLoader.loadObjModel("tree", loader),
@@ -70,7 +75,33 @@ public class MainGameLoop {
 		fernModel.getTexture().setHasTransparency(true);
 		fernModel.getTexture().setNumberOfRows(2);
 
-		Light light = new Light(new Vector3f(3000,2000,2000), new Vector3f(1,1,1));
+		TexturedModel lampModel = new TexturedModel(OBJLoader.loadObjModel("lamp", loader),
+				new ModelTexture(loader.loadTexture("lamp")));
+		//lampModel.getTexture().setHasTransparency(true);
+		lampModel.getTexture().setUseFakeLighting(true); // this permit to the light to glow
+		
+		TexturedModel pineModel = new TexturedModel(OBJLoader.loadObjModel("pine", loader),
+				new ModelTexture(loader.loadTexture("pine")));
+		
+		List<Light> lights = new ArrayList<Light>();
+		lights.add(new Light(new Vector3f(0,10000,-7000), new Vector3f(0.4f,0.4f,0.4f)));
+		lights.add(new Light(new Vector3f(185,10,-293), new Vector3f(2,0,0), new Vector3f(1,0.01f,0.002f)));
+		lights.add(new Light(new Vector3f(370,17,-300), new Vector3f(0,2,2), new Vector3f(1,0.01f,0.002f)));
+		lights.add(new Light(new Vector3f(293,7,-305), new Vector3f(2,2,0), new Vector3f(1,0.01f,0.002f)));
+
+		entities.add(new Entity(lampModel, 
+				new Vector3f(185, -4.7f, -293),
+				new Vector3f(0,0,0),
+				1));
+		entities.add(new Entity(lampModel, 
+				new Vector3f(370, 4.2f, -300),
+				new Vector3f(0,0,0),
+				1));
+		entities.add(new Entity(lampModel, 
+				new Vector3f(293, -6.8f, -305),
+				new Vector3f(0,0,0),
+				1));
+		
 		
 		TerrainTexture backgroundTexture = new TerrainTexture(loader.loadTexture("grass"));
 		TerrainTexture rTexture = new TerrainTexture(loader.loadTexture("dirt"));
@@ -83,10 +114,8 @@ public class MainGameLoop {
 		Terrain terrain = new Terrain(0,-1,loader, texturePack, blendMap, "heightmap");
 		
 
-		List<Entity> entities = new ArrayList<Entity>();
-		Random random = new Random();
 
-		for (int iii=0; iii<500; iii++) {
+		for (int iii=0; iii<250; iii++) {
 			float x = random.nextFloat()*800 - 400;
 			float z = random.nextFloat() * -600;
 			float y = terrain.getHeightOfTerrain(x, z);
@@ -94,7 +123,15 @@ public class MainGameLoop {
 					new Vector3f(x, y, z),
 					new Vector3f(0,0,0),3));
 		}
-		for (int iii=0; iii<5000; iii++) {
+		for (int iii=0; iii<250; iii++) {
+			float x = random.nextFloat()*800 - 400;
+			float z = random.nextFloat() * -600;
+			float y = terrain.getHeightOfTerrain(x, z);
+			entities.add(new Entity(pineModel,
+					new Vector3f(x, y, z),
+					new Vector3f(0,0,0),0.5f));
+		}
+		for (int iii=0; iii<500; iii++) {
 			float x = random.nextFloat()*800 - 400;
 			float z = random.nextFloat() * -600;
 			float y = terrain.getHeightOfTerrain(x, z);
@@ -107,29 +144,38 @@ public class MainGameLoop {
 		TexturedModel playerModel = new TexturedModel(OBJLoader.loadObjModel("person", loader),
 				new ModelTexture(loader.loadTexture("playerTexture")));
 		
-		Player player = new Player(playerModel, new Vector3f(0,terrain.getHeightOfTerrain(0, -50),-50), new Vector3f(0,3.14f,0), 0.4f);
+		Player player = new Player(playerModel, new Vector3f(180,terrain.getHeightOfTerrain(180, -250),-250), new Vector3f(0,3.14f,0), 0.4f);
 
 		Camera camera = new Camera(player);
 		
+		
+		List<GuiTexture> guis = new ArrayList<GuiTexture>();
+		GuiTexture gui = new GuiTexture(loader.loadTexture("health"), new Vector2f(-0.75f, 0.9f), new Vector2f(0.25f, 0.25f));
+		guis.add(gui);
+		
+		GuiRenderer guiRenderer = new GuiRenderer(loader);
 		MasterRenderer renderer = new MasterRenderer();
+		
 		manager.setDrawer(new DisplayManagerDraw() {
 			@Override
 			public void draw() {
 				//entity.increasePosition(0.0f, 0, -0.01f);
 				//entity.increaseRotation(0, 0, 0.01f);
 				//entity.increaseRotation(0.01f, 0.02f, 0.0f);
-				camera.move();
 				player.move(terrain);
+				camera.move();
 				renderer.processTerrain(terrain);
 				renderer.processEntity(player);
 				for (Entity entity : entities) {
 					entity.increaseRotation(0, 0.01f, 0.0f);
 					renderer.processEntity(entity);
 				}
-				renderer.render(light, camera);
+				renderer.render(lights, camera);
+				guiRenderer.render(guis);
 			} 
 		});
 		manager.loop();
+		guiRenderer.cleanUp();
 		renderer.cleanUp();
 		loader.cleanUp();
 		manager.unInit();

src/entities/Light.java

@@ -5,11 +5,16 @@ import org.atriaSoft.etk.math.Vector3f;
 public class Light {
 	private Vector3f position;
 	private Vector3f colour;
+	private Vector3f attenuation = new Vector3f(1, 0, 0);
 	public Light(Vector3f position, Vector3f colour) {
-		super();
 		this.position = position;
 		this.colour = colour;
 	}
+	public Light(Vector3f position, Vector3f colour, Vector3f attenuation) {
+		this.position = position;
+		this.colour = colour;
+		this.setAttenuation(attenuation);
+	}
 	public Vector3f getPosition() {
 		return position;
 	}
@@ -22,5 +27,11 @@ public class Light {
 	public void setColour(Vector3f colour) {
 		this.colour = colour;
 	}
+	public Vector3f getAttenuation() {
+		return attenuation;
+	}
+	public void setAttenuation(Vector3f attenuation) {
+		this.attenuation = attenuation;
+	}
 	
 }

src/guis/GuiRenderer.java

@@ -0,0 +1,52 @@
+package guis;
+
+import java.util.List;
+
+import org.atriaSoft.etk.math.Matrix4f;
+import org.lwjgl.opengl.GL11;
+import org.lwjgl.opengl.GL13;
+import org.lwjgl.opengl.GL20;
+import org.lwjgl.opengl.GL30;
+
+import models.RawModel;
+import renderEngine.Loader;
+import toolbox.Maths;
+
+public class GuiRenderer {
+
+	private final RawModel quad;
+	private GuiShader shader;
+
+	public GuiRenderer(Loader loader) {
+		 float[] positions = {-1, 1, -1, -1, 1, 1, 1, -1};
+		 quad = loader.loadToVAO(positions);
+		 shader = new GuiShader();
+	}
+	public void render(List<GuiTexture> guis) {
+		shader.start();
+		//System.out.println("Render Gui " + guis.size());
+		GL30.glBindVertexArray(quad.getVaoID());
+		GL20.glEnableVertexAttribArray(0);
+		GL11.glEnable(GL11.GL_BLEND);
+		GL11.glBlendFunc(GL11.GL_SRC_ALPHA,  GL11.GL_ONE_MINUS_SRC_ALPHA);
+		GL11.glDisable(GL11.GL_DEPTH_TEST);
+		for (GuiTexture gui: guis) {
+			GL13.glActiveTexture(GL13.GL_TEXTURE0);
+			GL11.glBindTexture(GL11.GL_TEXTURE_2D, gui.getTexture());
+			Matrix4f matrix = Maths.createTransformationMatrix(gui.getPosition(), gui.getScale());
+			shader.loadTransformation(matrix);
+			GL11.glDrawArrays(GL11.GL_TRIANGLE_STRIP, 0, quad.getVertexCount());
+			
+		}
+		GL11.glDisable(GL11.GL_BLEND);
+		GL11.glEnable(GL11.GL_DEPTH_TEST);
+		GL20.glDisableVertexAttribArray(0);	
+		GL30.glBindVertexArray(0);
+		shader.stop();
+	}
+	
+	public void cleanUp() {
+		shader.cleanUp();
+	}
+	
+}

src/guis/GuiShader.java

@@ -0,0 +1,35 @@
+package guis;
+
+import org.atriaSoft.etk.math.Matrix4f;
+
+import shaders.ShaderProgram;
+
+public class GuiShader extends ShaderProgram {
+	
+	private static final String VERTEX_FILE = "src/guis/guiVertexShader.txt";
+	private static final String FRAGMENT_FILE = "src/guis/guiFragmentShader.txt";
+	
+	private int location_transformationMatrix;
+
+	public GuiShader() {
+		super(VERTEX_FILE, FRAGMENT_FILE);
+	}
+	
+	public void loadTransformation(Matrix4f matrix){
+		super.loadMatrix(location_transformationMatrix, matrix);
+	}
+
+	@Override
+	protected void getAllUniformLocations() {
+		location_transformationMatrix = super.getUniformLocation("transformationMatrix");
+	}
+
+	@Override
+	protected void bindAttributes() {
+		super.bindAttribute(0, "position");
+	}
+	
+	
+	
+
+}

src/guis/GuiTexture.java

@@ -0,0 +1,33 @@
+package guis;
+
+import org.atriaSoft.etk.math.Vector2f;
+
+public class GuiTexture {
+	private int texture;
+	private Vector2f position;
+	private Vector2f scale;
+	public GuiTexture(int texture, Vector2f position, Vector2f scale) {
+		this.texture = texture;
+		this.position = position;
+		this.scale = scale;
+	}
+	public int getTexture() {
+		return texture;
+	}
+	public void setTexture(int texture) {
+		this.texture = texture;
+	}
+	public Vector2f getPosition() {
+		return position;
+	}
+	public void setPosition(Vector2f position) {
+		this.position = position;
+	}
+	public Vector2f getScale() {
+		return scale;
+	}
+	public void setScale(Vector2f scale) {
+		this.scale = scale;
+	}
+	
+}

src/guis/guiFragmentShader.txt

@@ -0,0 +1,11 @@
+#version 400 core
+
+in vec2 textureCoords;
+
+out vec4 out_Color;
+
+uniform sampler2D guiTexture;
+
+void main(void){
+	out_Color = texture(guiTexture,textureCoords);
+}

src/guis/guiVertexShader.txt

@@ -0,0 +1,13 @@
+#version 400 core
+
+in vec2 position;
+
+out vec2 textureCoords;
+
+uniform mat4 transformationMatrix;
+
+void main(void){
+
+	gl_Position = transformationMatrix * vec4(position, 0.0, 1.0);
+	textureCoords = vec2((position.x+1.0)/2.0, 1 - (position.y+1.0)/2.0);
+}

src/renderEngine/Loader.java

@@ -50,8 +50,17 @@ public class Loader {
 		return new RawModel(vaoID, indices.length);
 	}
 	
+	public RawModel loadToVAO(float[] positions) {
+		int vaoID = createVAO();
+		this.storeDataInAttributeList(0, 2, positions);
+		unbindVAO();
+		return new RawModel(vaoID, positions.length/2);
+	}
+	
 	public int loadTexture(String filename) {
-		int textureId = loadPNGTexture("res/" + filename + ".png", GL13.GL_TEXTURE0);
+		String fullname = "res/" + filename + ".png";
+		System.out.println("Load texture : " + fullname);
+		int textureId = loadPNGTexture(fullname, GL13.GL_TEXTURE0);
 		this.textures.add(textureId);
 		return textureId;
 	}

src/renderEngine/MasterRenderer.java

@@ -54,18 +54,18 @@ public class MasterRenderer {
 		GL11.glDisable(GL11.GL_BACK);
 	}
 	
-	public void render(Light sun, Camera camera) {
+	public void render(List<Light> lights, Camera camera) {
 		prepare();
 		shader.start();
 		shader.loadSkyColour(SKY_COLOUR);
-		shader.loadLight(sun);
+		shader.loadLights(lights);
 		shader.loadViewMatrix(camera);
 		renderer.render(entities);
 		shader.stop();
 		entities.clear();
 		terrainShader.start();
 		terrainShader.loadSkyColour(SKY_COLOUR);
-		terrainShader.loadLight(sun);
+		terrainShader.loadLights(lights);
 		terrainShader.loadViewMatrix(camera);
 		terrainRenderer.render(terrains); 
 		terrainShader.stop();

src/shaders/ShaderProgram.java

@@ -90,6 +90,7 @@ public abstract class ShaderProgram {
 	}
 	
 	private static int loadShader(String file, int type) {
+		System.out.println("Load shader: '" + file + "'");
 		StringBuilder shaderSource = new StringBuilder();
 		try {
 			BufferedReader reader = new BufferedReader(new FileReader(file));

src/shaders/StaticShader.java

@@ -1,5 +1,7 @@
 package shaders;
 
+import java.util.List;
+
 import org.atriaSoft.etk.math.Matrix4f;
 import org.atriaSoft.etk.math.Vector2f;
 import org.atriaSoft.etk.math.Vector3f;
@@ -9,14 +11,16 @@ import entities.Light;
 import toolbox.Maths;
 
 public class StaticShader extends ShaderProgram {
+	private static final int MAX_LIGHTS = 4;
 	private static final String VERTEX_FILE = "src/shaders/vertexShader.txt";
 	private static final String FRAGMENT_FILE = "src/shaders/fragmentShader.txt";
 
 	private int location_transformationMatrix;
 	private int location_projectionMatrix;
 	private int location_viewMatrix;
-	private int location_lightPosition;
+	private int location_lightPosition[];
-	private int location_lightColour;
+	private int location_lightColour[];
+	private int location_lightAttenuation[];
 	private int location_reflectivity;
 	private int location_shineDamper;
 	private int location_useFakeLighting;
@@ -40,14 +44,21 @@ public class StaticShader extends ShaderProgram {
 		location_transformationMatrix = super.getUniformLocation("transformationMatrix");
 		location_projectionMatrix = super.getUniformLocation("projectionMatrix");
 		location_viewMatrix = super.getUniformLocation("viewMatrix");
-		location_lightPosition = super.getUniformLocation("lightPosition");
-		location_lightColour = super.getUniformLocation("lightColour");
 		location_reflectivity = super.getUniformLocation("reflectivity");
 		location_shineDamper = super.getUniformLocation("shineDamper");
 		location_useFakeLighting = super.getUniformLocation("useFakeLighting");
 		location_skyColor = super.getUniformLocation("skyColor");
 		location_numberOfRows = super.getUniformLocation("numberOfRows");
 		location_offset = super.getUniformLocation("offset");
+
+		location_lightPosition = new int[MAX_LIGHTS];
+		location_lightColour = new int[MAX_LIGHTS];
+		location_lightAttenuation = new int[MAX_LIGHTS];
+		for (int iii=0; iii<MAX_LIGHTS; iii++) {
+			location_lightPosition[iii] = super.getUniformLocation("lightPosition[" + iii+ "]");
+			location_lightColour[iii] = super.getUniformLocation("lightColour[" + iii+ "]");
+			location_lightAttenuation[iii] = super.getUniformLocation("lightAttenuation[" + iii+ "]");
+		}
 	}
 	
 
@@ -75,9 +86,18 @@ public class StaticShader extends ShaderProgram {
 	public void loadTransformationMatrix(Matrix4f matrix) {
 		super.loadMatrix(location_transformationMatrix, matrix);
 	}
-	public void loadLight(Light light) {
+	public void loadLights(List<Light> lights) {
-		super.loadVector(location_lightPosition, light.getPosition());
+		for (int iii=0; iii<MAX_LIGHTS; iii++) {
-		super.loadVector(location_lightColour, light.getColour());
+			if (iii<lights.size()) {
+				super.loadVector(location_lightPosition[iii], lights.get(iii).getPosition());
+				super.loadVector(location_lightColour[iii], lights.get(iii).getColour());
+				super.loadVector(location_lightAttenuation[iii], lights.get(iii).getAttenuation());
+			} else {
+				super.loadVector(location_lightPosition[iii], new Vector3f(0,0,0));
+				super.loadVector(location_lightColour[iii], new Vector3f(0,0,0));
+				super.loadVector(location_lightAttenuation[iii], new Vector3f(1,0,0));
+			}
+		}
 	}
 	public void loadProjectionMatrix(Matrix4f projection) {
 		super.loadMatrix(location_projectionMatrix, projection);

src/shaders/TerrainShader.java

@@ -1,5 +1,7 @@
 package shaders;
 
+import java.util.List;
+
 import org.atriaSoft.etk.math.Matrix4f;
 import org.atriaSoft.etk.math.Vector3f;
 
@@ -8,14 +10,16 @@ import entities.Light;
 import toolbox.Maths;
 
 public class TerrainShader  extends ShaderProgram {
+	private static final int MAX_LIGHTS = 4;
 	private static final String VERTEX_FILE = "src/shaders/terrainVertexShader.txt";
 	private static final String FRAGMENT_FILE = "src/shaders/terrainFragmentShader.txt";
 
 	private int location_transformationMatrix;
 	private int location_projectionMatrix;
 	private int location_viewMatrix;
-	private int location_lightPosition;
+	private int location_lightPosition[];
-	private int location_lightColour;
+	private int location_lightColour[];
+	private int location_lightAttenuation[];
 	private int location_reflectivity;
 	private int location_shineDamper;
 	private int location_skyColor;
@@ -41,8 +45,6 @@ public class TerrainShader  extends ShaderProgram {
 		location_transformationMatrix = super.getUniformLocation("transformationMatrix");
 		location_projectionMatrix = super.getUniformLocation("projectionMatrix");
 		location_viewMatrix = super.getUniformLocation("viewMatrix");
-		location_lightPosition = super.getUniformLocation("lightPosition");
-		location_lightColour = super.getUniformLocation("lightColour");
 		location_reflectivity = super.getUniformLocation("reflectivity");
 		location_shineDamper = super.getUniformLocation("shineDamper");
 		location_skyColor = super.getUniformLocation("skyColor");
@@ -51,6 +53,14 @@ public class TerrainShader  extends ShaderProgram {
 		location_gTexture = super.getUniformLocation("gTexture");
 		location_bTexture = super.getUniformLocation("bTexture");
 		location_blendMap = super.getUniformLocation("blendMap");
+		location_lightPosition = new int[MAX_LIGHTS];
+		location_lightColour = new int[MAX_LIGHTS];
+		location_lightAttenuation = new int[MAX_LIGHTS];
+		for (int iii=0; iii<MAX_LIGHTS; iii++) {
+			location_lightPosition[iii] = super.getUniformLocation("lightPosition[" + iii+ "]");
+			location_lightColour[iii] = super.getUniformLocation("lightColour[" + iii+ "]");
+			location_lightAttenuation[iii] = super.getUniformLocation("lightAttenuation[" + iii+ "]");
+		}
 	}
 	
 	public void connectTextureUnits() {
@@ -74,9 +84,18 @@ public class TerrainShader  extends ShaderProgram {
 		super.loadMatrix(location_transformationMatrix, matrix);
 	}
 
-	public void loadLight(Light light) {
+	public void loadLights(List<Light> lights) {
-		super.loadVector(location_lightPosition, light.getPosition());
+		for (int iii=0; iii<MAX_LIGHTS; iii++) {
-		super.loadVector(location_lightColour, light.getColour());
+			if (iii<lights.size()) {
+				super.loadVector(location_lightPosition[iii], lights.get(iii).getPosition());
+				super.loadVector(location_lightColour[iii], lights.get(iii).getColour());
+				super.loadVector(location_lightAttenuation[iii], lights.get(iii).getAttenuation());
+			} else {
+				super.loadVector(location_lightPosition[iii], new Vector3f(0,0,0));
+				super.loadVector(location_lightColour[iii], new Vector3f(0,0,0));
+				super.loadVector(location_lightAttenuation[iii], new Vector3f(1,0,0));
+			}
+		}
 	}
 	
 	public void loadProjectionMatrix(Matrix4f projection) {

src/shaders/fragmentShader.txt

@@ -2,7 +2,7 @@
 
 in vec2 pass_textureCoordinates;
 in vec3 surfaceNormal;
-in vec3 toLightVector;
+in vec3 toLightVector[4];
 in vec3 toCameraVector;
 // FOW: Fog Of War result calculation
 in float visibility;
@@ -10,7 +10,8 @@ in float visibility;
 out vec4 out_Color;
 
 uniform sampler2D textureSampler;
-uniform vec3 lightColour;
+uniform vec3 lightColour[4];
+uniform vec3 lightAttenuation[4];
 uniform float reflectivity;
 uniform float shineDamper;
 uniform vec3 skyColor;
@@ -19,21 +20,27 @@ uniform vec3 skyColor;
 void main(void) {
 	
 	vec3 unitNormal = normalize(surfaceNormal);
-	vec3 unitLightVector = normalize(toLightVector);
-	
-	float nDot1 = dot(unitNormal, unitLightVector);
-	// the 0.2 represent the anbiant lightning ==> maybe set an uniform for this
-	float brightness = max(nDot1, 0.2);
-	vec3 diffuse = brightness * lightColour;
-	
 	vec3 unitVectorToCamera = normalize(toCameraVector);
+	vec3 totalDiffuse = vec3(0.0);
+	vec3 totalSpecular = vec3(0.0);
+	for(int i=0;i<4;i++) {
+		float distance = length(toLightVector[i]);
+		float attenuationFactor = lightAttenuation[i].x + (lightAttenuation[i].y * distance) + (lightAttenuation[i].z * distance * distance);
+		vec3 unitLightVector = normalize(toLightVector[i]);
+		float nDot1 = dot(unitNormal, unitLightVector);
+		float brightness = max(nDot1, 0.0);
 		vec3 lightDirection = -unitLightVector;
 		vec3 reflectedLightDirection = reflect(lightDirection, unitNormal);
-	
 		float specularFactor = dot(reflectedLightDirection, unitVectorToCamera);
 		specularFactor = max(specularFactor, 0.0);
 		float damperFactor = pow(specularFactor, shineDamper);
-	vec3 finalSpecular = damperFactor * reflectivity * lightColour;
+		vec3 diffuse = (brightness * lightColour[i]) / attenuationFactor;;
+		vec3 finalSpecular = (damperFactor * reflectivity * lightColour[i]) / attenuationFactor;;
+		totalDiffuse = totalDiffuse + diffuse;
+		totalSpecular = totalSpecular + finalSpecular;
+	}
+	// the 0.2 represent the ambiant lightning ==> maybe set an uniform for this
+	totalDiffuse = max (totalDiffuse, 0.2);
 	
 	// disable transparency elements in the texture ...
 	// Can be set at the start of the shader ...
@@ -42,7 +49,7 @@ void main(void) {
 		discard;
 	}
 	
-	out_Color = vec4(diffuse,1.0) * textureColour + vec4(finalSpecular, 1.0);
+	out_Color = vec4(totalDiffuse,1.0) * textureColour + vec4(totalSpecular, 1.0);
 	out_Color = mix(vec4(skyColor,1.0), out_Color, visibility);
 }
 

src/shaders/terrainFragmentShader.txt

@@ -2,7 +2,7 @@
 
 in vec2 pass_textureCoordinates;
 in vec3 surfaceNormal;
-in vec3 toLightVector;
+in vec3 toLightVector[4];
 in vec3 toCameraVector;
 // FOW: Fog Of War result calculation
 in float visibility;
@@ -15,7 +15,8 @@ uniform sampler2D gTexture;
 uniform sampler2D bTexture;
 uniform sampler2D blendMap;
 
-uniform vec3 lightColour;
+uniform vec3 lightColour[4];
+uniform vec3 lightAttenuation[4];
 uniform float reflectivity;
 uniform float shineDamper;
 uniform vec3 skyColor;
@@ -35,12 +36,16 @@ void main(void) {
 	vec4 totalColour = backgroundTextureColour + rTextureColour + gTextureColour + bTextureColour;
 	
 	vec3 unitNormal = normalize(surfaceNormal);
-	vec3 unitLightVector = normalize(toLightVector);
+	
+	vec3 totalDiffuse = vec3(0.0);
+	vec3 totalSpecular = vec3(0.0);
+	for(int i=0;i<4;i++) {
+		float distance = length(toLightVector[i]);
+		float attenuationFactor = lightAttenuation[i].x + (lightAttenuation[i].y * distance) + (lightAttenuation[i].z * distance * distance);
+		vec3 unitLightVector = normalize(toLightVector[i]);
 		
 		float nDot1 = dot(unitNormal, unitLightVector);
-	// the 0.2 represent the anbiant lightning ==> maybe set an uniform for this
+		float brightness = max(nDot1, 0.0);
-	float brightness = max(nDot1, 0.2);
-	vec3 diffuse = brightness * lightColour;
 		
 		vec3 unitVectorToCamera = normalize(toCameraVector);
 		vec3 lightDirection = -unitLightVector;
@@ -49,9 +54,15 @@ void main(void) {
 		float specularFactor = dot(reflectedLightDirection, unitVectorToCamera);
 		specularFactor = max(specularFactor, 0.0);
 		float damperFactor = pow(specularFactor, shineDamper);
-	vec3 finalSpecular = damperFactor * reflectivity * lightColour;
+		vec3 diffuse = (brightness * lightColour[i]) / attenuationFactor;
+		vec3 finalSpecular = (damperFactor * reflectivity * lightColour[i]) / attenuationFactor;
+		totalDiffuse = totalDiffuse + diffuse;
+		totalSpecular = totalSpecular + finalSpecular;
+	}
+	// the 0.2 represent the ambiant lightning ==> maybe set an uniform for this
+	totalDiffuse = max (totalDiffuse, 0.2);
 	
-	out_Color = vec4(diffuse,1.0) * totalColour + vec4(finalSpecular, 1.0); 
+	out_Color = vec4(totalDiffuse,1.0) * totalColour + vec4(totalSpecular, 1.0); 
 	out_Color = mix(vec4(skyColor,1.0), out_Color, visibility);
 }
 

src/shaders/terrainVertexShader.txt

@@ -6,7 +6,7 @@ in vec3 normal;
 
 out vec2 pass_textureCoordinates;
 out vec3 surfaceNormal;
-out vec3 toLightVector;
+out vec3 toLightVector[4];
 out vec3 toCameraVector;
 // FOW: Fog Of War result calculation
 out float visibility;
@@ -14,7 +14,7 @@ out float visibility;
 uniform mat4 transformationMatrix;
 uniform mat4 projectionMatrix;
 uniform mat4 viewMatrix;
-uniform vec3 lightPosition;
+uniform vec3 lightPosition[4];
 
 const float density = 0.007;
 const float gradient = 2.5;
@@ -26,7 +26,9 @@ void main(void) {
 	pass_textureCoordinates = textureCoords;
 	
 	surfaceNormal = (transformationMatrix * vec4(normal, 0.0)).xyz;
-	toLightVector = lightPosition - worldPosition.xyz;
+	for(int i=0;i<4;i++) {
+		toLightVector[i] = lightPosition[i] - worldPosition.xyz;
+	}
 	toCameraVector = (inverse(viewMatrix) * vec4(0.0,0.0,0.0,1.0)).xyz - worldPosition.xyz;
 	
 	float distance = length(positionRelativeToCam.xyz);

src/shaders/vertexShader.txt

@@ -6,7 +6,7 @@ in vec3 normal;
 
 out vec2 pass_textureCoordinates;
 out vec3 surfaceNormal;
-out vec3 toLightVector;
+out vec3 toLightVector[4];
 out vec3 toCameraVector;
 // FOW: Fog Of War result calculation
 out float visibility;
@@ -14,7 +14,7 @@ out float visibility;
 uniform mat4 transformationMatrix;
 uniform mat4 projectionMatrix;
 uniform mat4 viewMatrix;
-uniform vec3 lightPosition; 
+uniform vec3 lightPosition[4]; 
 
 uniform float useFakeLighting;
 
@@ -36,7 +36,9 @@ void main(void) {
 		actualNormal = vec3(0.0, 1.0, 0.0);
 	}
 	surfaceNormal = (transformationMatrix * vec4(actualNormal, 0.0)).xyz;
-	toLightVector = lightPosition - worldPosition.xyz;
+	for(int i=0;i<4;i++) {
+		toLightVector[i] = lightPosition[i] - worldPosition.xyz;
+	}
 	toCameraVector = (inverse(viewMatrix) * vec4(0.0,0.0,0.0,1.0)).xyz - worldPosition.xyz;
 	
 	float distance = length(positionRelativeToCam.xyz);

src/toolbox/Maths.java

@@ -38,4 +38,11 @@ public class Maths {
 		matrix.translate(new Vector3f(-camarePos.x,-camarePos.y,-camarePos.z));
 		return matrix;
 	}
+	public static Matrix4f createTransformationMatrix(Vector2f translation, Vector2f scale) {
+		Matrix4f matrix = new Matrix4f();
+		matrix.setIdentity();
+		matrix.translate(new Vector3f(translation.x, translation.y, 0));
+		matrix.scale(new Vector3f(scale.x, scale.y, 1f));
+		return matrix;
+	}
 }