lolengine/test-map.cpp

// Test stuff

#ifdef WIN32
#   define WIN32_LEAN_AND_MEAN
#   include <windows.h>
#endif
#if defined __APPLE__ && defined __MACH__
#   include <OpenGL/gl.h>
#   include <OpenGL/glu.h>
#else
#   include <GL/gl.h>
#   include <GL/glu.h>
#endif

#include <SDL.h>
#include <SDL_image.h>

float xrot, yrot, zrot;

/* Storage for one texture  */
GLuint texture[1];

// Load Bitmaps And Convert To Textures
void LoadGLTextures(void)
{	
    SDL_Surface *image1 = IMG_Load("art/test/groundtest.png");

    if (!image1)
    {
        SDL_Quit();
        exit(1);
    }

    glGenTextures(1, &texture[0]);
    glBindTexture(GL_TEXTURE_2D, texture[0]);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

    glTexImage2D(GL_TEXTURE_2D, 0, 4, image1->w, image1->h, 0,
                 GL_RGBA, GL_UNSIGNED_BYTE, image1->pixels);
};

void InitGL(int Width, int Height)
{
    glViewport(0, 0, Width, Height);
    LoadGLTextures();
    glEnable(GL_TEXTURE_2D);
    glClearColor(0.0f, 0.0f, 1.0f, 0.0f);
    glClearDepth(1.0);
    glDepthFunc(GL_LESS);
    glEnable(GL_DEPTH_TEST);
    glShadeModel(GL_SMOOTH);

    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();

    gluPerspective(45.0f, (GLfloat)Width / (GLfloat)Height, 0.1f, 100.0f);

    glMatrixMode(GL_MODELVIEW);
}

/* The main drawing function. */
void DrawGLScene()
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glLoadIdentity();

    glTranslatef(0.0f, 0.0f, -5.0f);

    glRotatef(xrot, 1.0f, 0.0f, 0.0f);
    glRotatef(yrot, 0.0f, 1.0f, 0.0f);
    glRotatef(zrot, 0.0f, 0.0f, 1.0f);

    glBindTexture(GL_TEXTURE_2D, texture[0]);

    glBegin(GL_QUADS);

    glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f,  1.0f);
    glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f,  1.0f);
    glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f,  1.0f,  1.0f);
    glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f,  1.0f,  1.0f);

    glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f);
    glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f,  1.0f, -1.0f);
    glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f,  1.0f, -1.0f);
    glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, -1.0f);

    glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f,  1.0f, -1.0f);
    glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f,  1.0f,  1.0f);
    glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f,  1.0f,  1.0f);
    glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f,  1.0f, -1.0f);

    glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, -1.0f, -1.0f);
    glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, -1.0f, -1.0f);
    glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f,  1.0f);
    glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f,  1.0f);

    glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f, -1.0f);
    glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f,  1.0f, -1.0f);
    glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f,  1.0f,  1.0f);
    glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f,  1.0f);

    glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f);
    glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f,  1.0f);
    glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f,  1.0f,  1.0f);
    glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f,  1.0f, -1.0f);

    glEnd();

    xrot += 0.2f;
    yrot += 0.2f;
    zrot += 0.2f;

    SDL_GL_SwapBuffers();
}

int main(int argc, char **argv)
{
  int done;

  /* Initialize SDL for video output */
  if ( SDL_Init(SDL_INIT_VIDEO) < 0 )
  {
    fprintf(stderr, "Unable to initialize SDL: %s\n", SDL_GetError());
    exit(1);
  }

  /* Create a 640x480 OpenGL screen */
  if ( SDL_SetVideoMode(640, 480, 0, SDL_OPENGL) == NULL )
  {
    fprintf(stderr, "Unable to create OpenGL screen: %s\n", SDL_GetError());
    SDL_Quit();
    exit(2);
  }

  /* Set the title bar in environments that support it */
  SDL_WM_SetCaption("Deus Hax", NULL);

  /* Loop, drawing and checking events */
  InitGL(640, 480);
  done = 0;
  while ( !done )
  {
    DrawGLScene();

    /* This could go in a separate function */
    SDL_Event event;
    while ( SDL_PollEvent(&event) )
    {
      if ( event.type == SDL_QUIT )
        done = 1;
      if ( event.type == SDL_KEYDOWN )
        if ( event.key.keysym.sym == SDLK_ESCAPE )
          done = 1;
    }
  }
  SDL_Quit();
  return 1;
}