[DEV] tutorial 17 'multiple texturing' implementation

src/engineTester/MainGameLoop.java

@@ -22,6 +22,8 @@ import renderEngine.OBJLoader;
 import renderEngine.EntityRenderer;
 import shaders.StaticShader;
 import terrains.Terrain;
+import terrains.TerrainTexture;
+import terrains.TerrainTexturePack;
 import textures.ModelTexture;
 
 /**
@@ -57,14 +59,28 @@ public class MainGameLoop {
 				new ModelTexture(loader.loadTexture("grassTexture")));
 		grassModel.getTexture().setHasTransparency(true);
 		grassModel.getTexture().setUseFakeLighting(true);
+		
+		TexturedModel flowerModel = new TexturedModel(OBJLoader.loadObjModel("grassModel", loader),
+				new ModelTexture(loader.loadTexture("flower")));
+		flowerModel.getTexture().setHasTransparency(true);
+		flowerModel.getTexture().setUseFakeLighting(true);
+		
 		TexturedModel fernModel = new TexturedModel(OBJLoader.loadObjModel("fern", loader),
 				new ModelTexture(loader.loadTexture("fern")));
 		fernModel.getTexture().setHasTransparency(true);
 		
 		Light light = new Light(new Vector3f(3000,2000,2000), new Vector3f(1,1,1));
+
+		TerrainTexture backgroundTexture = new TerrainTexture(loader.loadTexture("grass"));
+		TerrainTexture rTexture = new TerrainTexture(loader.loadTexture("dirt"));
+		TerrainTexture gTexture = new TerrainTexture(loader.loadTexture("grassFlowers"));
+		TerrainTexture bTexture = new TerrainTexture(loader.loadTexture("path"));
+		TerrainTexturePack texturePack = new TerrainTexturePack(backgroundTexture, rTexture, gTexture, bTexture);
+
+		TerrainTexture blendMap = new TerrainTexture(loader.loadTexture("blendMap"));
 		
-		Terrain terrain = new Terrain(0,-1,loader, new ModelTexture(loader.loadTexture("grass")));
-		Terrain terrain2 = new Terrain(-1,-1,loader, new ModelTexture(loader.loadTexture("grass")));
+		Terrain terrain = new Terrain(0,-1,loader, texturePack, blendMap);
+		Terrain terrain2 = new Terrain(-1,-1,loader, texturePack, blendMap);
 		
 		Camera camera = new Camera();
 
@@ -81,6 +97,9 @@ public class MainGameLoop {
 			entities.add(new Entity(fernModel,
 					new Vector3f(random.nextFloat()*800 - 400, 0, random.nextFloat() * -600),
 					new Vector3f(0,0,0),0.6f));
+			entities.add(new Entity(flowerModel,
+					new Vector3f(random.nextFloat()*800 - 400, 0, random.nextFloat() * -600),
+					new Vector3f(0,0,0),1.5f));
 		}
 		
 		MasterRenderer renderer = new MasterRenderer();

src/entities/Camera.java

@@ -26,6 +26,12 @@ public class Camera {
 		if (DisplayManager.isKeyDown('a')) {
 			position.x -= 0.8f;
 		}
+		if (DisplayManager.isKeyDown('q')) {
+			position.y += 0.8f;
+		}
+		if (DisplayManager.isKeyDown('z')) {
+			position.y -= 0.8f;
+		}
 	}
 
 	public Vector3f getPosition() {

src/renderEngine/Loader.java

@@ -57,7 +57,6 @@ public class Loader {
 	}
 	
     private int loadPNGTexture(String filename, int textureUnit) {
-    	ByteBuffer bufIn = null;
     	ByteBuffer buf = null;
         int tWidth = 0;
         int tHeight = 0;
@@ -71,7 +70,8 @@ public class Loader {
             tHeight = decoder.getHeight();
             // Decode the PNG file in a ByteBuffer
             buf = ByteBuffer.allocateDirect(4 * decoder.getWidth() * decoder.getHeight());
-            decoder.decodeFlipped(buf, decoder.getWidth() * 4, Format.RGBA);
+            //decoder.decodeFlipped(buf, decoder.getWidth() * 4, Format.RGBA);
+            decoder.decode(buf, decoder.getWidth() * 4, Format.RGBA);
             buf.flip();
             in.close();
         } catch (IOException e) {
@@ -96,10 +96,10 @@ public class Loader {
         GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_T, GL11.GL_REPEAT);
          
         // Setup what to do when the texture has to be scaled
-//        GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MAG_FILTER, GL11.GL_NEAREST);
-//        GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER, GL11.GL_LINEAR_MIPMAP_LINEAR);
-        GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MAG_FILTER, GL11.GL_LINEAR);
-        GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER, GL11.GL_LINEAR);
+        GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MAG_FILTER, GL11.GL_NEAREST);
+        GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER, GL11.GL_LINEAR_MIPMAP_LINEAR);
+//        GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MAG_FILTER, GL11.GL_LINEAR);
+//        GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER, GL11.GL_LINEAR);
          
         this.exitOnGLError("loadPNGTexture");
          

src/renderEngine/OBJLoader.java

@@ -6,7 +6,8 @@ import objConverter.OBJFileLoader;
 
 public class OBJLoader {
 	public static RawModel loadObjModel(String fileName, Loader loader) {
-		ModelData data = OBJFileLoader.loadOBJ("tree");
+		System.out.println("Load file " + fileName);
+		ModelData data = OBJFileLoader.loadOBJ(fileName);
 		return loader.loadToVAO(data.getVertices(), data.getTextureCoords(), data.getNormals(), data.getIndices());
 	}
 }

src/renderEngine/TerrainRenderer.java

@@ -13,6 +13,7 @@ import org.lwjgl.opengl.GL30;
 import models.RawModel;
 import shaders.TerrainShader;
 import terrains.Terrain;
+import terrains.TerrainTexturePack;
 import textures.ModelTexture;
 import toolbox.Maths;
 
@@ -24,6 +25,7 @@ public class TerrainRenderer {
 		this.shader = shader;
 		shader.start();
 		shader.loadProjectionMatrix(projectionMatrix);
+		shader.connectTextureUnits();
 		shader.stop();
 	}
 
@@ -43,12 +45,24 @@ public class TerrainRenderer {
 		GL20.glEnableVertexAttribArray(0);
 		GL20.glEnableVertexAttribArray(1);
 		GL20.glEnableVertexAttribArray(2);
-		ModelTexture texture = terrain.getTexture();
-		shader.loadShineVariable(texture.getShineDamper(), texture.getReflectivity());
-		GL13.glActiveTexture(GL13.GL_TEXTURE0);
-		GL11.glBindTexture(GL11.GL_TEXTURE_2D, texture.getTexturedID());
+		bindTextures(terrain);
+		shader.loadShineVariable(1, 0);
 	}
 
+	private void bindTextures(Terrain terrain) {
+		TerrainTexturePack texturePack = terrain.getTexturePack();
+		GL13.glActiveTexture(GL13.GL_TEXTURE0);
+		GL11.glBindTexture(GL11.GL_TEXTURE_2D, texturePack.getBackgroundTexture().getTextureId());
+		GL13.glActiveTexture(GL13.GL_TEXTURE1);
+		GL11.glBindTexture(GL11.GL_TEXTURE_2D, texturePack.getrTexture().getTextureId());
+		GL13.glActiveTexture(GL13.GL_TEXTURE2);
+		GL11.glBindTexture(GL11.GL_TEXTURE_2D, texturePack.getgTexture().getTextureId());
+		GL13.glActiveTexture(GL13.GL_TEXTURE3);
+		GL11.glBindTexture(GL11.GL_TEXTURE_2D, texturePack.getbTexture().getTextureId());
+		GL13.glActiveTexture(GL13.GL_TEXTURE4);
+		GL11.glBindTexture(GL11.GL_TEXTURE_2D, terrain.getBlendMap().getTextureId());
+	}
+	
 	private void unbindTexturedModel() {
 		GL20.glDisableVertexAttribArray(0);
 		GL20.glDisableVertexAttribArray(1);

src/shaders/ShaderProgram.java

@@ -60,10 +60,15 @@ public abstract class ShaderProgram {
 	protected void loadFloat(int location, float value) {
 		GL20.glUniform1f(location, value);
 	}
+	
+	protected void loadInt(int location, int value) {
+		GL20.glUniform1i(location, value);
+	}
 
 	protected void loadVector(int location, Vector3f value) {
 		GL20.glUniform3f(location, value.x, value.y, value.z);
 	}
+	
 	protected void loadBoolean(int location, boolean value) {
 		//System.out.println("set value " + value + " " + (value==true?1.0f:0.0f));
 		GL20.glUniform1f(location, value==true?1.0f:0.0f);

src/shaders/TerrainShader.java

@@ -19,6 +19,11 @@ public class TerrainShader  extends ShaderProgram {
 	private int location_reflectivity;
 	private int location_shineDamper;
 	private int location_skyColor;
+	private int location_backgroundTexture;
+	private int location_rTexture;
+	private int location_gTexture;
+	private int location_bTexture;
+	private int location_blendMap;
 
 	public TerrainShader() {
 		super(VERTEX_FILE, FRAGMENT_FILE);
@@ -41,6 +46,19 @@ public class TerrainShader  extends ShaderProgram {
 		location_reflectivity = super.getUniformLocation("reflectivity");
 		location_shineDamper = super.getUniformLocation("shineDamper");
 		location_skyColor = super.getUniformLocation("skyColor");
+		location_backgroundTexture = super.getUniformLocation("backgroundTexture");
+		location_rTexture = super.getUniformLocation("rTexture");
+		location_gTexture = super.getUniformLocation("gTexture");
+		location_bTexture = super.getUniformLocation("bTexture");
+		location_blendMap = super.getUniformLocation("blendMap");
+	}
+	
+	public void connectTextureUnits() {
+		super.loadInt(location_backgroundTexture, 0);
+		super.loadInt(location_rTexture, 1);
+		super.loadInt(location_gTexture, 2);
+		super.loadInt(location_bTexture, 3);
+		super.loadInt(location_blendMap, 4);
 	}
 	
 	public void loadSkyColour(Vector3f color) {

src/shaders/terrainFragmentShader.txt

@@ -9,7 +9,12 @@ in float visibility;
 
 out vec4 out_Color;
 
-uniform sampler2D textureSampler;
+uniform sampler2D backgroundTexture;
+uniform sampler2D rTexture;
+uniform sampler2D gTexture;
+uniform sampler2D bTexture;
+uniform sampler2D blendMap;
+
 uniform vec3 lightColour;
 uniform float reflectivity;
 uniform float shineDamper;
@@ -18,6 +23,17 @@ uniform vec3 skyColor;
 
 void main(void) {
 	
+	vec4 blendMapColour = texture(blendMap, pass_textureCoordinates);
+	
+	float backTextureAmount = 1 - (blendMapColour.r + blendMapColour.g + blendMapColour.b);
+	vec2 tiledCoords = pass_textureCoordinates * 40.0;
+	vec4 backgroundTextureColour = texture(backgroundTexture, tiledCoords) * backTextureAmount;
+	vec4 rTextureColour = texture(rTexture, tiledCoords) * blendMapColour.r;
+	vec4 gTextureColour = texture(gTexture, tiledCoords) * blendMapColour.g;
+	vec4 bTextureColour = texture(bTexture, tiledCoords) * blendMapColour.b;
+	
+	vec4 totalColour = backgroundTextureColour + rTextureColour + gTextureColour + bTextureColour;
+	
 	vec3 unitNormal = normalize(surfaceNormal);
 	vec3 unitLightVector = normalize(toLightVector);
 	
@@ -35,7 +51,7 @@ void main(void) {
 	float damperFactor = pow(specularFactor, shineDamper);
 	vec3 finalSpecular = damperFactor * reflectivity * lightColour;
 	
-	out_Color = vec4(diffuse,1.0) * texture(textureSampler,pass_textureCoordinates) + vec4(finalSpecular, 1.0); 
+	out_Color = vec4(diffuse,1.0) * totalColour + vec4(finalSpecular, 1.0); 
 	out_Color = mix(vec4(skyColor,1.0), out_Color, visibility);
 }
 

src/terrains/Terrain.java

@@ -11,10 +11,12 @@ public class Terrain {
 	private float x;
 	private float z;
 	private RawModel model;
-	private ModelTexture texture;
+	private TerrainTexturePack texturePack;
+	private TerrainTexture blendMap;
 	
-	public Terrain(int girdX, int girdZ, Loader loader, ModelTexture texture) {
-		this.texture = texture;
+	public Terrain(int girdX, int girdZ, Loader loader, TerrainTexturePack texturePack, TerrainTexture blendMap) {
+		this.texturePack = texturePack;
+		this.blendMap = blendMap;
 		this.x = girdX * SIZE;
 		this.z = girdZ * SIZE;
 		this.model = generateTerrain(loader);
@@ -35,8 +37,8 @@ public class Terrain {
 				normals[vertexPointer*3] = 0;
 				normals[vertexPointer*3+1] = 1;
 				normals[vertexPointer*3+2] = 0;
-				textureCoords[vertexPointer*2] = (float)j/((float)VERTEX_COUNT - 1)*100;
-				textureCoords[vertexPointer*2+1] = (float)i/((float)VERTEX_COUNT - 1)*100;
+				textureCoords[vertexPointer*2] = (float)j/((float)VERTEX_COUNT - 1);
+				textureCoords[vertexPointer*2+1] = (float)i/((float)VERTEX_COUNT - 1);
 				vertexPointer++;
 			}
 		}
@@ -82,11 +84,11 @@ public class Terrain {
 		this.model = model;
 	}
 
-	public ModelTexture getTexture() {
-		return texture;
+	public TerrainTexture getBlendMap() {
+		return blendMap;
 	}
 
-	public void setTexture(ModelTexture texture) {
-		this.texture = texture;
+	public TerrainTexturePack getTexturePack() {
+		return texturePack;
 	}
 }

src/terrains/TerrainTexture.java

@@ -0,0 +1,18 @@
+package terrains;
+
+public class TerrainTexture {
+	private int textureId;
+
+	public TerrainTexture(int textureId) {
+		this.textureId = textureId;
+	}
+	
+	public int getTextureId() {
+		return textureId;
+	}
+
+	public void setTextureId(int textureId) {
+		this.textureId = textureId;
+	}
+
+}

src/terrains/TerrainTexturePack.java

@@ -0,0 +1,32 @@
+package terrains;
+
+public class TerrainTexturePack {
+	private TerrainTexture backgroundTexture;
+	private TerrainTexture rTexture;
+	private TerrainTexture gTexture;
+	private TerrainTexture bTexture;
+
+	public TerrainTexturePack(TerrainTexture backgroundTexture, TerrainTexture rTexture, TerrainTexture gTexture,
+			TerrainTexture bTexture) {
+		this.backgroundTexture = backgroundTexture;
+		this.rTexture = rTexture;
+		this.gTexture = gTexture;
+		this.bTexture = bTexture;
+	}
+	
+	public TerrainTexture getBackgroundTexture() {
+		return backgroundTexture;
+	}
+
+	public TerrainTexture getrTexture() {
+		return rTexture;
+	}
+
+	public TerrainTexture getgTexture() {
+		return gTexture;
+	}
+
+	public TerrainTexture getbTexture() {
+		return bTexture;
+	}
+}