/////// This enemy behavior seeks out the player ////////
/////// until they reach a set Y value at which ////////
/////// point they simply fly straight. ////////
void AI::enemy1Update(Enemy &enemy, GSP420::ABC *player, const float dt)
{
// Check if enemy Y position is higher than half the game height
if (enemy.getPosition().y > 0.0f) // TODO: Modify for exact game height constant
{
D3DXVECTOR3 tempVel;
// Get new enemy direction based on player position
tempVel = player->getPosition() - enemy.getPosition();
D3DXVec3Normalize(&tempVel, &tempVel);
// Multiply enemy direction by its speed to get its velocity
tempVel *= ENEMY_SPEED;
enemy.setVelocity(tempVel);
}
// Uncomment if needed
//enemy.setPosition(enemy.getPosition() += enemy.getVelocity() * dt);
// Check if enemy should fire a bullet
float bFireRate = enemy.getBulletFireRate();
enemy.setBulletFireRate(bFireRate -= dt);
if (bFireRate <= 0.0f)
{
enemy.fireBullet(D3DXVECTOR3(0.0f, -5.0f, 0.0f)); // TODO: Modify for a fixed bullet speed constant
enemy.setBulletFireRate(ENEMY_BULLET_FR);
}
}
//////// Boss moves down into game screen ////////
//////// then begins its attack run ////////
void AI::enemyBossUpdate(Enemy &enemy, const float dt)
{
// Move into game screen
if (enemy.getPosition() < D3DXVECTOR3(0.0f, 20.0f, 0.0f)) // TODO: Modify for constant Y position value
{
D3DXVECTOR3 vel = D3DXVECTOR3(0.0f, -5.0f, 0.0f);
enemy.setVelocity(vel);
// Uncomment if needed
//enemy.setPosition(enemy.getPosition() += vel * dt);
}
else
{
// Begin attack run
// Fire bullets
float bFireRate = enemy.getBulletFireRate();
enemy.setBulletFireRate(bFireRate -= dt);
if (bFireRate <= 0.0f)
{
float x = -20.0f;
for (int i = 0; i < 4; i++)
{
enemy.fireBullet(D3DXVECTOR3(x, -20.0f, 0.0f));
x += 10.0f;
}
enemy.setBulletFireRate(1.0f);
}
// Fire missiles
float missFireRate = enemy.getMissileFireRate();
enemy.setMissileFireRate(missFireRate -= dt);
if (missFireRate <= 0.0f)
{
enemy.fireMissile(D3DXVECTOR3(0.0f, -20.0f, 0.0f));
enemy.setMissileFireRate(10.0f);
}
// Fire mines
// Cannot specify where to drop mine
// Mines are listed as a pickup, are they intended to be picked up by the player?
/*float mineFireRate = enemy.getMineFireRate();
enemy.setMineFireRate(mineFireRate -= dt);
if (mineFireRate <= 0.0f)
{
}*/
}
}
