History: IntermediateTutorial5Source

This is the source for Intermediate Tutorial 5.

 #include "ExampleApplication.h"
 
 class TutorialApplication : public ExampleApplication
 {
 protected:
 public:
     TutorialApplication()
     {
     }
 
     ~TutorialApplication() 
     {
     }
 protected:
     MeshPtr mGrassMesh;
 
     void createGrassMesh()
     {
         const float width = 25;
         const float height = 30;
         ManualObject mo("GrassObject");
 
         Vector3 vec(width/2, 0, 0);
         Quaternion rot;
         rot.FromAngleAxis(Degree(60), Vector3::UNIT_Y);
     
         mo.begin("Examples/GrassBlades", RenderOperation::OT_TRIANGLE_LIST);
         for (int i = 0; i < 3; ++i)
         {
             mo.position(-vec.x, height, -vec.z);
             mo.textureCoord(0, 0);
 
             mo.position(vec.x, height, vec.z);
             mo.textureCoord(1, 0);
 
             mo.position(-vec.x, 0, -vec.z);
             mo.textureCoord(0, 1);
 
             mo.position(vec.x, 0, vec.z);
             mo.textureCoord(1, 1);
             
             int offset = i * 4;
             mo.triangle(offset, offset+3, offset+1);
             mo.triangle(offset, offset+2, offset+3);
 
             vec = rot * vec;
         }
         mo.end();
 
         mo.convertToMesh("GrassBladesMesh");
     }
 
     void createScene(void)
     {
         createGrassMesh();
         mSceneMgr->setAmbientLight(ColourValue(1, 1, 1));
 
         mCamera->setPosition(150, 50, 150);
         mCamera->lookAt(0, 0, 0);
 
         Entity *robot = mSceneMgr->createEntity("robot", "robot.mesh");
         mSceneMgr->getRootSceneNode()->createChildSceneNode()->attachObject(robot);
 
         Plane plane;
         plane.normal = Vector3::UNIT_Y;
         plane.d = 0;
         MeshManager::getSingleton().createPlane("floor",
             ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME, plane,
             450,450,10,10,true,1,50,50,Vector3::UNIT_Z);
         Entity* pPlaneEnt = mSceneMgr->createEntity("plane", "floor");
         pPlaneEnt->setMaterialName("Examples/GrassFloor");
         pPlaneEnt->setCastShadows(false);
         mSceneMgr->getRootSceneNode()->createChildSceneNode()->attachObject(pPlaneEnt);
 
         Entity *grass = mSceneMgr->createEntity("grass", "GrassBladesMesh");
         StaticGeometry *sg = mSceneMgr->createStaticGeometry("GrassArea");
 
         const int size = 375;
         const int amount = 20;
 
         sg->setRegionDimensions(Vector3(size, size, size));
         sg->setOrigin(Vector3(-size/2, 0, -size/2));
 
         for (int x = -size/2; x < size/2; x += (size/amount))
             for (int z = -size/2; z < size/2; z += (size/amount))
             {
                 Real r = size / (float)amount / 2;
                 Vector3 pos(x + Math::RangeRandom(-r, r), 0, z + Math::RangeRandom(-r, r));
                 Vector3 scale(1, Math::RangeRandom(0.9, 1.1), 1);
                 Quaternion orientation;
                 orientation.FromAngleAxis(Degree(Math::RangeRandom(0, 359)), Vector3::UNIT_Y);
 
                 sg->addEntity(grass, pos, orientation, scale);
             }
 
         sg->build();
     }
 };
 
 #if OGRE_PLATFORM == OGRE_PLATFORM_WIN32
 #define WIN32_LEAN_AND_MEAN
 #include "windows.h"
 
 INT WINAPI WinMain(HINSTANCE hInst, HINSTANCE, LPSTR strCmdLine, INT)
 #else
 int main(int argc, char **argv)
 #endif
 {
     // Create application object
     TutorialApplication app;
 
     try {
         app.go();
     } catch(Exception& e) {
 #if OGRE_PLATFORM == OGRE_PLATFORM_WIN32 
         MessageBoxA(NULL, e.getFullDescription().c_str(), "An exception has occurred!", MB_OK | MB_ICONERROR | MB_TASKMODAL);
 #else
         fprintf(stderr, "An exception has occurred: %s\n",
             e.getFullDescription().c_str());
 #endif
     }
 
     return 0;
 }

{{Ogre Tutorial}}

Category:Tutorials