拾取地形的问题

Game_Cen

我是用鼠标左键拾取的 每拾取一次都会出现如下的警告
Direct3D9: (WARN) :Static index buffer locked more than once per frame. Could have severe performance penalty.
Direct3D9: (WARN) :Static index buffer locked more than once per frame. Could have severe performance penalty.
Direct3D9: (WARN) :Static index buffer locked more than once per frame. Could have severe performance penalty.
Direct3D9: (WARN) :Static index buffer locked more than once per frame. Could have severe performance penalty.
Direct3D9: (WARN) :Static index buffer locked more than once per frame. Could have severe performance penalty.
Direct3D9: (WARN) :Static index buffer locked more than once per frame. Could have severe performance penalty.
Direct3D9: (WARN) :Static index buffer locked more than once per frame. Could have severe performance penalty.

请问怎么处理。

zhyinty

这只是性能警告，想必你是直接Lock缓冲读取地形的数据吧，这种方式效率实在是太低了。

wsz317sky

对每个面做射线检测效率太低了。

我建议:
   沿射线方向穷举。

   vec3 start, end;
   vec3 dir;
   vec3 pos;
   
   while (pos < end)
   {
        float y = get_terrain_height(pos.x, pos.z);
        if (pos.y < y)
          break;

        pos += dir;
   }

一般情况都挺快的。

游戏阿家

拾取地形怎么会LOCK index buffer? 没有高度图数据吗?