GeometryWars/EnemySpawner.cpp at master · rroa/GeometryWars · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
#include "Utility/package.hpp"

#include "package.h"

//---------------------------------------------------------------------------------
// Written by Terence J. Grant - tjgrant [at] tatewake [dot] com
// Find the full tutorial at: http://gamedev.tutsplus.com/series/
//----------------------------------------------------------------------------------

tVector2f EnemySpawner::GetSpawnPosition()
{
    tVector2f pos;
    do
    {
        pos = tVector2f(tMath::random() * GameRoot::getInstance()->getViewportSize().width,
                tMath::random() * GameRoot::getInstance()->getViewportSize().height);
    }
    while (pos.distanceSquared(PlayerShip::getInstance()->getPosition()) < 250 * 250);

    return pos;
}

EnemySpawner::EnemySpawner()
        :   mInverseSpawnChance(90)
{

}

void EnemySpawner::update()
{
    if (!PlayerShip::getInstance()->getIsDead() && EntityManager::getInstance()->getCount() < 3)
    {
        if (int32_t(tMath::random() * mInverseSpawnChance) == 0)
        {
            EntityManager::getInstance()->add(Enemy::createSeeker(GetSpawnPosition()));
        }

        if (int32_t(tMath::random() * mInverseSpawnChance) == 0)
        {
            EntityManager::getInstance()->add(Enemy::createWanderer(GetSpawnPosition()));
        }

        if (EntityManager::getInstance()->getBlackHoleCount() < 2 && int32_t(tMath::random() * mInverseBlackHoleChance) == 0)
        {
            EntityManager::getInstance()->add(new BlackHole(GetSpawnPosition()));
        }
    }

    if (mInverseSpawnChance > 30)
    {
        mInverseSpawnChance -= 0.005f;
    }
}

void EnemySpawner::reset()
{
    mInverseSpawnChance = 90;
}