4-render.cpp

void render() {
  
    // Clear screen
    SDL_RenderClear(gRenderer);
  
    // Render zombies
    for (int i = 0; i < ZOMBIE_COUNT; i++) {
        if (zombies[i].alive) {
            SDL_Rect srcZombie = { .x = (zombies[i].frameX / zombieAnimSpeed) * zombieWidth, .y = zombies[i].frameY * zombieHeight, .w = zombieWidth, .h = zombieHeight };
            SDL_Rect dstZombie = { .x = (int)zombies[i].x, .y = (int)zombies[i].y, .w = zombieWidth, .h = zombieHeight };
            SDL_RendererFlip flip = zombies[i].dir == 1 ? SDL_FLIP_NONE : SDL_FLIP_HORIZONTAL;
            SDL_RenderCopyEx(gRenderer, zombieTexture, &srcZombie, &dstZombie, 0, NULL, flip);
        }
    }
  
    // Update the screen
    SDL_RenderPresent(gRenderer);
    
    // Update animation frame
    for (int i = 0; i < ZOMBIE_COUNT; i++) {
        zombies[i].frameX++;
        if (zombies[i].alive && zombies[i].frameX / zombieAnimSpeed >= 4) {
           zombies[i].frameX = 0;
        }
    }
  
}