Code: 3d_underwater_world/world.h

This is an example OpenGL SDL application which creates an animated 3D underwater world (screenshot), with "Thunderbird 4" with headlights moving on a spline path, a randomly generated sand terrain, sunken ship/submarine/treasure chest models, and swaying fish and seaweed. It is designed to demonstrate basic OpenGL features, and the structure is as follows:

#include "global.h"
#include "terrain.h"
#include "textures.h"
#include "clipping.h"
#include "worldobjects.h"

class World
{
      private:
              // world time in seconds since
              // the world was first started
              GLfloat time;
              // visible distance from eye visible 
              // in world coordinates
              GLfloat visibleDistance;
              // terrain
              TerrainGrid* floor;
              Texture* sandTex;
              float floorW, floorD;
              // thunderbird 4
              VehicleObject* vehicle;
              // static objects
              StaticObject** staticObject;
              GrassObject** grassObjects;
              // fish
              FishObject** fish;
              // initializes the world
              void init();
              // draws the landscape
              int draw_landscape(CameraView* view);
      public:
             // constructor
             World();
             // destructor
             ~World();
             // simulate the scene, updating the time
             // dT - the change in the world time in seconds
             //      this will normally be the positive time
             //      since the last simulate, but could be negative
             void simulate(GLfloat dT);
             // goes to the time of the picture
             void gotoPicTime();
             // check for collision, and if
             // one occurs provides the point of
             // collision
             // position - vertex to check
             // direction - direction of vertex as it approached
             // result - when returns true contains the point of collision
             bool collisionDetect(Vec3* position, Vec3* direction, Vec3* result);
             // resets the simulation to time 0
             // and all objects to their state at time 0
             void reset();
             // draws world that is currently
             // visible by the camera view
             // returns the triangle count for 
             // the current frame
             int draw(CameraView* view);
};

3D Underwater World (using OpenGL and SDL)

world.h