Code: 3d_underwater_world/staticobjects.cpp

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 "worldobjects.h"

/*
  UBoatObject class
  Submarine model
*/

UBoatObject::UBoatObject()
{
    width = 12;
    height = 20;
    depth = 62;
    org.x = -10;
    org.y = -8;
    org.z = -10;
}

// draw uboat at origin
void UBoatObject::drawMesh()
{
     // setup material and colour
     glMaterialf(GL_FRONT, GL_SHININESS, 11);
     GLfloat spec[] = {0.7, 0.7, 0.7, 1.0};
     glMaterialfv(GL_FRONT, GL_SPECULAR, spec);
     GLfloat em[] = {0.1, 0.1, 0.1, 1.0};
     glMaterialfv(GL_FRONT, GL_EMISSION, em);
     glColor3f(0.3, 0.3, 0.3);
     
     // draw cylinder
     glPushMatrix();
     glScalef(5, 7, 50);
     Primitives::drawCylinder();
     glPopMatrix();
     
     // draw two spheres at each end
     glPushMatrix();
     glScalef(5, 7, 5);
     Primitives::drawSphere();
     glPopMatrix();
     glPushMatrix();
     glTranslatef(0, 0, 50);
     glScalef(5, 7, 5);
     Primitives::drawSphere();
     glPopMatrix();
     
     // draw bit on top
     glPushMatrix();
     glTranslatef(0, 9, 20);
     glScalef(3, 6, 5);
     glRotatef(90, 1, 0, 0);
     Primitives::drawCylinder();
     Primitives::drawDisk();
     glPopMatrix();
     
     // fins
     Vec3 box[8];
     Vec3 na[8];
     Mat4 m;
     Primitives::initBox(box);
     m.setI();
     m.scale(0.5, 15, 5);
     m.translate(0.0, -7, -8);
     m.transform(box, 8);
     Primitives::boxNormals(box, na);
     Primitives::drawBox(box, na);
     
     Primitives::initBox(box);
     m.setI();
     m.scale(0.5, 15, 5);
     m.translate(0.0, -7, -8);
          m.rotate(90, 0, 0, 1);
     m.transform(box, 8);
     Primitives::boxNormals(box, na);
     Primitives::drawBox(box, na);
     
     // revert material
     glMaterialf(GL_FRONT, GL_SHININESS, 0);
     spec[0] = 0.0; spec[1] = 0.0; spec[2] = 0.0;
     glMaterialfv(GL_FRONT, GL_SPECULAR, spec);
     em[0] = 0.0; em[1] = 0.0; em[2] = 0.0;
     glMaterialfv(GL_FRONT, GL_EMISSION, spec);
}

/*
  Ship class
  A sunken ship
*/
ShipObject::ShipObject()
{
    width = 12;
    height = 14;
    depth = 32;
}

void ShipObject::drawMesh()
{
     // init
     Vec3 box[8];
     Vec3 na[8];
     Mat4 m;
          
     // the ship base
     glColor3f(0.64, 0.32, 0);
     Primitives::initBox(box);
     m.setI();
     m.scale(10.0, 10.0, 30.0);
     m.translate(0.0, 0.0, 0.0);
     m.transform(box, 8);
     box[0].add(2, 0, 4);
     box[3].add(-2, 0, 4);
     box[4].add(2, 0, -4);
     box[7].add(-2, 0, -4);
     Primitives::boxNormals(box, na);
     Primitives::drawBox(box, na);
     
     // the cabins
     Primitives::initBox(box);
     m.setI();
     m.scale(10.0, 2.0, 10.0);
     m.translate(0.0, 10.0, 0.0);
     m.transform(box, 8);
     box[1].add(0, 1, 0);
     box[2].add(0, 1, 0);
     Primitives::boxNormals(box, na);
     Primitives::drawBox(box, na);
     
     // the main mast
     glPushMatrix();
     glTranslatef(5, 30, 15);
     glScalef(0.5, 20, 0.5);
     glRotatef(90, 1, 0, 0);
     Primitives::drawCylinder();
     glPopMatrix();
     
     // cross beams
     // large
     glPushMatrix();
     glRotatef(90, 0, 1, 0);
     glTranslatef(-15, 20, -2.5);
     glScalef(0.5, 0.5, 15);
     Primitives::drawCylinder();
     glPopMatrix();
     glPushMatrix();
     glRotatef(90, 0, 1, 0);
     glTranslatef(-15, 27, 0);
     glScalef(0.5, 0.5, 10);
     Primitives::drawCylinder();
     glPopMatrix();
}

/*
  TreasureChest class
  A treasure chest
*/
TreasureChestObject::TreasureChestObject()
{
    goldT = new Texture("gold00.jpg");
    width = 3.5;
    height = 2.5;
    depth = 2.0;
    org.x = -0.3;
    org.y = -0.3;
    org.z = -0.3;
}

void TreasureChestObject::drawMesh()
{    
     
     // init 
     Vec3 box[8];
     Vec3 na[8];
     Mat4 m;
          
     // the chest itself
     glColor3f(0.64, 0.32, 0);
     Primitives::initBox(box);
     m.setI();
     m.scale(3.0, 1.0, 1.5);
     m.translate(0.0, 0.0, 0.0);
     m.transform(box, 8);
     Primitives::boxNormals(box, na);
     Primitives::drawBox(box, na);
         
     // the lid
     glPushMatrix();
     glTranslatef(0, 1.2, 1.9);
     glRotatef(-120, 1, 0, 0);
     Primitives::initBox(box);
     m.setI();
     m.scale(3.0, 0.5, 1.5);
     m.translate(0.0, 0.0, 0.0);
     m.transform(box, 8);
     box[0].add(0.2, 0, 0.4);
     box[3].add(-0.2, 0, 0.4);
     box[4].add(0.2, 0, -0.4);
     box[7].add(-0.2, 0, -0.4);
     Primitives::boxNormals(box, na);
     Primitives::drawBox(box, na);
     glPopMatrix();
     
     // the treasure
     FaceInfo faces[6];
     FaceInfo::initBox(faces, 1, 1, 0);
     //FaceInfo::initBox(faces, goldT);
     Primitives::initBox(box);
     m.setI();
     m.scale(2.5, 0.9, 1.2);
     m.translate(0.2, 0.2, 0.2);
     m.transform(box, 8);
     Primitives::boxNormals(box, na);
     Primitives::drawBox(box, na, faces);
     
     /*Primitives::initBox(box);
     m.setI();
     m.scale(5, 5, 5);
     m.translate(0.2, 20, 0.2);
     m.transform(box, 8);
     Primitives::boxNormals(box, na);
     Primitives::drawBox(box, na, faces);*/
}
3D Underwater World (using OpenGL and SDL)

staticobjects.cpp
