void nGame::Process()
{
static float absoluteTime = 0.0f;
static float absoluteTime2 = 0.0f;
// Check for pause key
if(nGetInstance()->GetInput()->GetKeyboard()->GetNewKey(DIK_PAUSE) || nGetInstance()->GetInput()->GetKeyboard()->GetNewKey(DIK_P))
SetPause(!GetPause());
// Don't process further if paused
if(m_Pause)
return;
absoluteTime += nGetInstance()->GetElapsedTime();
absoluteTime2 += nGetInstance()->GetElapsedTime();
// Create enemy missle if enough time passed
if(absoluteTime > m_MissleTime)
{
// Reset the timer
absoluteTime = 0.0f;
if(m_MissleTime > 1.0f)
m_MissleTime -= (double)nGetInstance()->GetElapsedTime() / 4.0f;
// Create a missle at a random top position going to a random bottom position
AddMissle(nVector2(randf(0.0f,nGetInstance()->GetGraphics()->GetDisplaySize().cx),0.0f),nVector2(randf(0.0f,nGetInstance()->GetGraphics()->GetDisplaySize().cx),nGetInstance()->GetGraphics()->GetDisplaySize().cy),1.0f,80.0f,GAME_ENEMY_COLOR,false,true);
}
// Create child enemy missle if enough time passed
if(absoluteTime2 > 100.0f)
{
// Reset the timer
absoluteTime2 = 0.0f;
if(m_Missles.size())
{
// Create a missle at a random trail of a nother missle
unsigned long count = 1 + rand() % 3;
Missle* missle = &m_Missles[rand() % m_Missles.size()];
// Find a live enemy missle
while(missle->frendly || missle->dead > 0.0f)
missle = &m_Missles[rand() % m_Missles.size()];
nVector2 dir = missle->position - missle->source;
float length = dir.Length();
dir.Normalize();
nVector2 source = missle->source + dir * randf(0.0f,length);
for(unsigned long i = 0; i < count; i++)
AddMissle(source,nVector2(randf(0.0f,nGetInstance()->GetGraphics()->GetDisplaySize().cx),nGetInstance()->GetGraphics()->GetDisplaySize().cy),1.0f,80.0f,GAME_ENEMY_COLOR,false,true);
}
}
// Check left missle silo launch
if(nGetInstance()->GetInput()->GetMouse()->GetNewButton(nMouse::ButtonLeft))
FireSilo(m_Silos[0],nGetInstance()->GetInput()->GetMouse()->GetPosition(),20.0f,80.0f,true);
// Check right missle silo launch
if(nGetInstance()->GetInput()->GetMouse()->GetButton(nMouse::ButtonRight))
{
// Get a random vector in a sphere domain
nVector2 miss(randf(-1.0f,1.0f),randf(-1.0f,1.0f));
miss.Normalize();
miss *= randf(0.0f,50.0f);
FireSilo(m_Silos[1],nGetInstance()->GetInput()->GetMouse()->GetPosition() + miss,30.0f,20.0f,false);
}
// Remove silo fire time
for(unsigned long i = 0; i < m_Silos.size(); i++)
{
Silo* silo = &m_Silos[i];
// Remove some fire time
silo->time -= nGetInstance()->GetElapsedTime();
// Check if all/too much fire time was removed
if(silo->time < 0.0f)
silo->time = 0.0f;
}
// Move missles and remove dead ones
for(unsigned long i = 0; i < m_Missles.size(); i++)
{
Missle* missle = &m_Missles[i];
if(missle->position == missle->destination || missle->dead > 0.0f)
{
if(missle->position == missle->destination && !missle->frendly && missle->dead == 0.0f)
{
// Players base got hit
SetHealth(GetHealth() - 10);
// Check if player dead
if(!GetHealth())
{
// Game over
AddHiScore(m_Score);
RestartGame();
return;
}
}
if(missle->dead > 10.0f)
{
// Remove missle
RemoveMissle(i--);
continue;
}
if(missle->dead == 0.0f)
{
// Explode
AddExplosion(missle->position,missle->blast,4.0f,nColor(1.0f,0.1f,1.0f));
}
missle->dead += nGetInstance()->GetElapsedTime();
continue;
}
if(missle->target > 0.0f)
missle->target -= nGetInstance()->GetElapsedTime() / 10.0f;
else if(missle->target < 0.0f)
missle->target = 0.0f;
nVector2 velocity = missle->destination - missle->source;
velocity.Normalize();
velocity *= missle->speed * nGetInstance()->GetElapsedTime();
if(velocity.x > 0.0f && missle->position.x + velocity.x > missle->destination.x)
missle->position.x = missle->destination.x;
else if(velocity.x < 0.0f && missle->position.x + velocity.x < missle->destination.x)
missle->position.x = missle->destination.x;
else
missle->position.x += velocity.x;
if(velocity.y > 0.0f && missle->position.y + velocity.y > missle->destination.y)
missle->position.y = missle->destination.y;
else if(velocity.y < 0.0f && missle->position.y + velocity.y < missle->destination.y)
missle->position.y = missle->destination.y;
else
missle->position.y += velocity.y;
}
// Expand explosions and remove dead ones
for(unsigned long i = 0; i < m_Explosions.size(); i++)
{
Explosion* explosion = &m_Explosions[i];
if(explosion->size == explosion->power)
{
// Remove it
RemoveExplosion(i--);
continue;
}
float expansion = explosion->speed * nGetInstance()->GetElapsedTime();
if(explosion->size + expansion > explosion->power)
explosion->size = explosion->power;
else
explosion->size += expansion;
// Check if the explosion destroyed any missles
for(unsigned long j = 0; j < m_Missles.size(); j++)
{
Missle* missle = &m_Missles[j];
// Skip frendly or already dead missles
if(missle->frendly || missle->dead > 0.0f)
continue;
nVector2 dir = missle->position - explosion->position;
unsigned long points = 0;
if(dir.Length() < explosion->size)
{
// Set death time
missle->dead += nGetInstance()->GetElapsedTime();
// Create some particles
for(unsigned long k = 0; k < 50; k++)
{
// Get a random vector in a sphere domain
nVector2 velocity(randf(-1.0f,1.0f),randf(-1.0f,1.0f));
velocity.Normalize();
velocity *= randf(0.0f,5.0f);
AddParticle(missle->position,velocity,nVector2(0.0f,0.1f),10.0f,GAME_COLOR_PARTICLES);
}
// Add player points
points++;
}
// Add score
if(points > 1)
SetScore(GetScore() + points + points / 2);
else
SetScore(GetScore() + points);
}
}
// Move and remove particles
for(unsigned long i = 0; i < m_Particles.size(); i++)
{
Particle* particle = &m_Particles[i];
// Remove the particle if it's dead
if(particle->lived >= particle->life)
{
// Remove it
RemoveParticle(i--);
continue;
}
particle->lived += nGetInstance()->GetElapsedTime();
particle->velocity += particle->force * nGetInstance()->GetElapsedTime();
particle->position += particle->velocity * nGetInstance()->GetElapsedTime();
}
}
//updates the world one tick
void UpdateGame(void)
{
int numbigasteroids = 0, nummedasteroids = 0;
LIST * cur;
LIST * next;
static unsigned int fpsframes = 0;
static unsigned int last_fps_time = 0;
unsigned int t;
char hiscore_name[HS_NAME_LENGTH];
if(g_paused)
return;
UpdateStarfield(&g_starfield);
for(cur = g_asteroid_list; cur; cur = cur->next)
{
if(((ASTEROID *)cur->d)->scale == 4.0f)
numbigasteroids++;
else if(((ASTEROID *)cur->d)->scale == 2.0f)
nummedasteroids++;
}
t = 1500*numbigasteroids + 500*nummedasteroids + (int)(16384.0/pow((double)g_score, 0.3010299956639811952));
if(g_ships
&& !g_time_to_reset
&& g_level > 2
&& !(rand() % t))
{
NewAlien(g_score >= 10000 ? (rand() % 3) : 1);
}
t = (g_ships + 1) * 1000;
if(g_ships
&& g_ships < 11
&& !g_time_to_reset
&& !(rand() % t))
{
NewPowerup();
}
for(cur = g_asteroid_list; cur; cur = cur->next)
UpdateAsteroid(cur->d);
if(g_ships)
UpdatePlayer(&g_player, g_keys);
for(cur = g_alien_list; cur; cur = next)
{
next = cur->next;
UpdateAlien(cur->d, (g_ships ? &g_player : NULL), g_asteroid_list);
if(((ALIEN *)cur->d)->pos.x < 0.0f || ((ALIEN *)cur->d)->pos.x > 40.0f)
RemoveNode(cur, &g_alien_list);
}
for(cur = g_shot_list; cur; cur = next)
{
next = cur->next;
UpdateShot(cur->d);
if(!(((SHOT *)cur->d)->life))
RemoveNode(cur, &g_shot_list);
}
for(cur = g_explosion_list; cur; cur = next)
{
next = cur->next;
UpdateExplosion(cur->d);
if(!(((EXPLOSION *)cur->d)->life))
RemoveNode(cur, &g_explosion_list);
}
for(cur = g_burst_list; cur; cur = next)
{
next = cur->next;
UpdateBurst(cur->d);
if(!(((BURST *)cur->d)->life))
RemoveNode(cur, &g_burst_list);
}
for(cur = g_powerup_list; cur; cur = next)
{
next = cur->next;
UpdatePowerup(cur->d);
if(((POWERUP *)cur->d)->pos.x < 0.0f || ((POWERUP *)cur->d)->pos.x > 40.0f)
RemoveNode(cur, &g_powerup_list);
}
Clipping();
g_frame++; //next frame
if(g_time_to_reset && !(--g_time_to_reset))
NextLevel();
if(!g_ships && g_hisct_delay && !(--g_hisct_delay) && IsScoreHi(&g_hisct, g_score) && GetHiScoreName(hiscore_name))
AddHiScore(&g_hisct, hiscore_name, g_score, g_level);
fpsframes++;
t = glutGet(GLUT_ELAPSED_TIME);
if(t >= last_fps_time + 1000)
{
g_fps = (float)fpsframes / (float)(t - last_fps_time) * 1000.0f;
fpsframes = 0;
last_fps_time = t;
}
glutPostRedisplay();
}
