Now generating seperate terrain meshes for chunks.

game/level.cc

@@ -229,6 +229,7 @@ void Level::setSkydomeObject(Skydome object){
 
 void Level::addObject(Object* object) {
     allObjects.push_back(object);
+    //int xPosition = object->getPosition().x - terrain.getHeightmapHeight
     chunks.at(0).at(0).addObject(object);
 }
 
@@ -335,12 +336,13 @@ void Level::printPosition() {
 }
 
 void Level::generateChunks(int chunkSize) {
+    this->chunkSize = chunkSize;
     int numberChunksX = 0;
-    if (terrain.getHeightmapHeight() % chunkSize == 0) {
-        numberChunksX = terrain.getHeightmapHeight()/chunkSize;
+    if (terrain.getHeightmapWidth() % chunkSize == 0) {
+        numberChunksX = terrain.getHeightmapWidth()/chunkSize;
     }
     else {
-        numberChunksX = (terrain.getHeightmapHeight()/chunkSize) + 1;
+        numberChunksX = (terrain.getHeightmapWidth()/chunkSize) + 1;
     }
     int numberChunksZ = 0;
     if (terrain.getHeightmapHeight() % chunkSize == 0) {
@@ -358,3 +360,7 @@ void Level::generateChunks(int chunkSize) {
         chunks.at(i) = zChunks;
     }
 }
+
+std::vector<std::vector<Chunk>>* Level::getChunks() {
+    return &chunks;
+}

game/level.hh

@@ -75,6 +75,7 @@ class Level {
         void setTerrain(Terrain terrain);
         void printPosition();
         void generateChunks(int chunkSize);
+        std::vector<std::vector<Chunk>>* getChunks();
     private:
         lua_State* luaState=nullptr;
         std::vector<Object*> crossChunkObjects;
@@ -99,6 +100,7 @@ class Level {
         float strength;
         std::string xmlFilePath;
         glm::vec3 nextLightPosition;
+        float chunkSize;
 };
 
 #endif

game/loader.cc

@@ -2,6 +2,8 @@
 #include <ACGL/OpenGL/Objects/VertexArrayObject.hh>
 using namespace tinyxml2;
 
+const int chunkSize = 50;
+
 Loader::Loader() {
 }
 
@@ -80,10 +82,10 @@ void Loader::load(std::string filePath, Level* level, std::string compositionsPa
     }
     Terrain terrain = Terrain(levelHeightmapPath);
     level->setTerrain(terrain);
-    // Because object gets copied a lot load it when it has reached it's final destination
+    // Because object gets copied a lot, load it when it has reached it's final destination
     level->getTerrain()->load();
-    level->generateChunks(50.0f);
-    Model terrainModel = Model(level->getTerrain()->getModel());
+    // generate appropriate amount of chunks depending on the heightmap size.
+    level->generateChunks(chunkSize);
     std::string terrainTexture = queryString(terrainElement, "texture");
     float terrainAmbientFactor = queryFloat(terrainElement, "ambientFactor");
     float terrainDiffuseFactor = queryFloat(terrainElement, "diffuseFactor");
@@ -95,10 +97,15 @@ void Loader::load(std::string filePath, Level* level, std::string compositionsPa
         exit(-1);
     }
     Material terrainMaterial = Material(terrainTexture, terrainAmbientFactor, terrainDiffuseFactor, terrainSpecularFactor, terrainShininess);
-    Object* terrainObject = new Object(terrainModel, terrainMaterial,
-    glm::vec3(-0.5*((float)level->getTerrain()->getHeightmapHeight()-1), 0.0f, -0.5f*((float)level->getTerrain()->getHeightmapWidth()-1)),
-        glm::vec3(0.0f, 0.0f, 0.0f), true);
-    level->addObject(terrainObject);
+    for (unsigned int i = 0; i<level->getChunks()->size(); i++) {
+        for (unsigned int j = 0; j<level->getChunks()->at(i).size(); j++) {
+            Model terrainModel = Model(level->getTerrain()->makeTriangleMesh(i*chunkSize, j*chunkSize, (i+1)*chunkSize+1, (j+1)*chunkSize+1));
+            Object* terrainObject = new Object(terrainModel, terrainMaterial,
+            glm::vec3(-0.5*((float)level->getTerrain()->getHeightmapHeight()-1), 0.0f, -0.5f*((float)level->getTerrain()->getHeightmapWidth()-1)),
+                glm::vec3(0.0f, 0.0f, 0.0f), true);
+            level->addObject(terrainObject);
+        }
+    }
     level->getPhysics()->addTerrain(level->getTerrain()->getHeightmapWidth(), level->getTerrain()->getHeightmapHeight(), level->getTerrain()->getHeightmap());
     
     //load the skydome

game/terrain.cc

@@ -29,10 +29,9 @@ void Terrain::load() {
             this->heightmap[columnNum][rowNum] = (float)(image[(rowNum*heightmapWidth+columnNum)*4]) / 6; //<--heightmap is scaled here
         }
     }
-    this->makeTriangleMesh(0, 0, heightmapHeight, heightmapWidth);
 }
 
-void Terrain::makeTriangleMesh(int startX, int startZ, int endX, int endZ) {
+SharedVertexArrayObject Terrain::makeTriangleMesh(int startX, int startZ, int endX, int endZ) {
     if (startX < 0) {
         startX = 0;
     }
@@ -46,7 +45,8 @@ void Terrain::makeTriangleMesh(int startX, int startZ, int endX, int endZ) {
         endZ = heightmapWidth;
     }
 
-    ACGL::OpenGL::SharedArrayBuffer ab = std::make_shared<ACGL::OpenGL::ArrayBuffer>();
+    SharedArrayBuffer ab = SharedArrayBuffer(new ArrayBuffer());
+    SharedVertexArrayObject vao = SharedVertexArrayObject(new VertexArrayObject());
     // Do NOT change the order of this!
     ab->defineAttribute("aPosition", GL_FLOAT, 3);
     ab->defineAttribute("aTexCoord", GL_FLOAT, 2);
@@ -54,7 +54,7 @@ void Terrain::makeTriangleMesh(int startX, int startZ, int endX, int endZ) {
     
     int rowNum = startX, columnNum = startZ, dataCount=0, floatsPerVertex=8; //initializing:
     bool movingRight = true, isUp = true;
-    int numVertices = (this->heightmapHeight - 1) * (this->heightmapWidth * 2 + 1) + 1;
+    int numVertices = ((endX - startX) - 1) * ((endZ - startZ) * 2 + 1) + 1;
     float* abData = new float[numVertices * floatsPerVertex];
     
     while(rowNum < endX){ //traversing the Triangle Strip!
@@ -98,10 +98,10 @@ void Terrain::makeTriangleMesh(int startX, int startZ, int endX, int endZ) {
     
     ab->setDataElements(numVertices, abData);
     delete abData;
-    this->triangleMesh = std::make_shared<ACGL::OpenGL::VertexArrayObject>();
-    this->triangleMesh->bind();
-    this->triangleMesh->setMode(GL_TRIANGLE_STRIP);
-    this->triangleMesh->attachAllAttributes(ab);
+    vao->bind();
+    vao->setMode(GL_TRIANGLE_STRIP);
+    vao->attachAllAttributes(ab);
+    return vao;
 }
 
 
@@ -150,10 +150,6 @@ void Terrain::set_abData(float* abData, int dataCount, int rowNum, int columnNum
     }
 }
 
-Model Terrain::getModel(){
-    return Model(this->triangleMesh);
-}
-
 float** Terrain::getHeightmap(){
     return this->heightmap;
 }

game/terrain.hh

@@ -5,6 +5,9 @@
 #include "material.hh"
 #include <ACGL/OpenGL/Objects/VertexArrayObject.hh>
 #include "model.hh"
+
+using namespace ACGL::OpenGL;
+
 class Terrain {
     public:
         Terrain(std::string heightmapFilePath);
@@ -12,17 +15,15 @@ class Terrain {
         ~Terrain();
         void load();
         void render();
-        Model getModel();
         float** getHeightmap();
         int getHeightmapHeight();
         int getHeightmapWidth();
-        void makeTriangleMesh(int startX, int startZ, int endX, int endZ);
+        SharedVertexArrayObject makeTriangleMesh(int startX, int startZ, int endX, int endZ);
     private:
         Material material;
         std::string heightmapFilePath;
         int heightmapHeight, heightmapWidth;
         float** heightmap; //can be accessed like 'float[][]'
-        ACGL::OpenGL::SharedVertexArrayObject triangleMesh;
         void set_abData(float* abData, int dataCount, int rowNum, int columnNum);
 };