LWJGL 中的 3D 拾取

Question

我正在制作一个 Minecraft 风格的游戏，将块的 3D 阵列分成块。但是然后我需要检查块播放器指向什么来执行世界修改。到目前为止，这是我想出的：

    private Block getBlockLookedAt(EntityPlayer ep) {


        double px = ep.getPosition().x;
        double py = ep.getPosition().y;
        double pz = ep.getPosition().z;

        float pPitch = ep.getPitch()*-1;
        float pYaw = ep.getYaw()*-1;

        double searchRadius = 6;

        double targetX = searchRadius * Math.cos(Math.toRadians(pYaw))*Math.sin(Math.toRadians(pPitch));
        double targetY = searchRadius * Math.sin(Math.toRadians(pYaw))*Math.sin(Math.toRadians(pPitch));
        double targetZ = searchRadius * Math.cos(Math.toRadians(pPitch));
        //System.out.println("=");
        //System.out.println(px + "," + py + "," + pz);
        //System.out.println(targetX + "," + targetY + "," + targetZ);
        //System.out.println("=");
        for(double i = 0; i<searchRadius; i+=0.01){
            targetX = i * Math.cos(Math.toRadians(pYaw))*Math.sin(Math.toRadians(pPitch));
            targetY = i * Math.sin(Math.toRadians(pYaw))*Math.sin(Math.toRadians(pPitch));
            targetZ = i * Math.cos(Math.toRadians(pPitch));
            int bx = (int)Math.ceil(targetX+px);
            int by = (int)Math.ceil((targetY*-1)+py);
            int bz = (int)Math.ceil(targetZ+pz);
            System.out.println(bx + "," + by + "," + bz + "," + getBlock(bx,by,bz).getID());
            if(getBlock(bx,by,bz).getID()!=0)return getBlock(bx,by,bz);
        }



        return Block.air;
    }

我在这里所做的是使用球坐标，并在检查半径中添加 0.01 以检查范围内是否存在与空气不同的块。虽然这似乎不起作用（它总是返回空气，我需要在块内才能检测到其他块） 有人有解决方案，或者有更好的方法吗？

附言。我已经阅读了 schabby 的教程，据我理解，它不会检查 Z 轴，所以这不是我想要的。

Answer 1

double searchRadius = 0;
...
for(double i = 0; i<searchRadius; i+=0.01){
    ...
}
return Block.air;

试试大于零的searchRadius。