Messages

1

Graphics / Re: Enemy Sprites spawn but don't move and can't be killed

« on: September 29, 2024, 12:38:28 pm »

I figured out the problem. There is a bug in the github code and I believe in the book itself. In the Zombie.cpp file the m_Alive boolean is never initialized. All I had to do was set m_Alive = true; in the void Zombie::spawn() type like so:

void Zombie::spawn(float startX, float startY, int type, int seed)
{
        m_Alive = true;
        switch(type)
        {
        case 0:
                // Bloater
                m_Sprite = Sprite(TextureHolder::GetTexture("graphics/bloater.png"));
                m_Speed = BLOATER_SPEED;
                m_Health = BLOATER_HEALTH;
                break;

        case 1:
                // Chaser
                m_Sprite = Sprite(TextureHolder::GetTexture("graphics/chaser.png"));
                m_Speed = CHASER_SPEED;
                m_Health = CHASER_HEALTH;
                break;
               
        case 2:
                // Crawler
                m_Sprite = Sprite(TextureHolder::GetTexture("graphics/crawler.png"));
                m_Speed = CRAWLER_SPEED;
                m_Health = CRAWLER_HEALTH;
                break; 
        }

2

Graphics / Re: Enemy Sprites spawn but don't move and can't be killed

« on: September 21, 2024, 07:35:31 pm »

Hi Frank,

I have the exact same problem though I'm only in chapter 10 so I don't have as much of the code fleshed out as in your example. The code will compile correctly and the game will start but a seemingly random number of the enemy sprites will remain fixed to the arena walls and are unresponsive. To compare with my code I ran the sample code the publisher posted to github to check and see if I could identify any errors. When I ran the example the same problem appeared.

I'm not sure if the problem is in the code logic itself or if it's an artifact of something else. I'm using the g++ compiler in ubuntu using a makefile and writing my code in text files; I'm not using visual studio so I wonder if that could be the source of the problem.

If you have made any progress on this I'd be curious to hear about what you did.

Best,
JZ