Light Bug

[BertilBraun]

Light updates are disabled, because I can not find the bug, thats causing the assert.

In the queue of lightupdates sometimes NULL objects get pushed back (maybe the reason).

void FinishLights() {

    while (!sunRemovalQueue.empty()) {

        if (&sunRemovalQueue.front() == nullptr)
            continue;

        glm::vec3   pos = sunRemovalQueue.front().first;
        short       val = sunRemovalQueue.front().second;

        Vector2 c = chunkCoord(pos.x, pos.z);
        Vector2 b = blockCoord(pos.x, pos.z);

        sunRemovalQueue.pop();

        auto TrySetLightValue = [&](float ox, float oy, float oz) {

            int neighborLevel = getSunlight(b.x + ox, pos.y + oy, b.z + oz);

            if (neighborLevel != 0 && neighborLevel < val) 
                resetSunlight(pos.x + ox, pos.y + oy, pos.z + oz);

            else if (neighborLevel >= val) 
                sunLightQueue.emplace(pos.x + ox, pos.y + oy, pos.z + oz);
        };

        TrySetLightValue(-1,  0,  0);
        TrySetLightValue( 1,  0,  0);
        TrySetLightValue( 0, -1,  0);
        TrySetLightValue( 0,  1,  0);
        TrySetLightValue( 0,  0, -1);
        TrySetLightValue( 0,  0,  1);
    }
}

void resetSunlight(int x, int y, int z){ 

    sunRemovalQueue.emplace(glm::vec3(x, y, z), getSunlight(x, y, z));
    setSunlight(x, y % CHUNK_SIZE, z, 0);
}