添加动态阻挡时想要带上Flag，业务层可根据其Flag做不同业务逻辑

动态阻挡增加Flag about navmeshscene HOT 1 CLOSED

kangzr commented on June 1, 2024

动态阻挡增加Flag

from navmeshscene.

Comments (1)

fananchong commented on June 1, 2024

看了下源代码，动态障碍物的实现原理，是把动态障碍物区域镂空。镂空后，这块区域是 DT_TILECACHE_NULL_AREA 。寻路上，就是遇到 Wall 。即动态障碍物区域是没有 ploy 的，更无法谈及对 ploy 设置 flag

具体相关代码如下：

dtStatus dtTileCache::buildNavMeshTile(const dtCompressedTileRef ref, dtNavMesh* navmesh)
{	
	// 略
	
	// Rasterize obstacles.
	for (int i = 0; i < m_params.maxObstacles; ++i)
	{
		const dtTileCacheObstacle* ob = &m_obstacles[i];
		if (ob->state == DT_OBSTACLE_EMPTY || ob->state == DT_OBSTACLE_REMOVING)
			continue;
		if (contains(ob->touched, ob->ntouched, ref))
		{
			if (ob->type == DT_OBSTACLE_CYLINDER)
			{
				dtMarkCylinderArea(*bc.layer, tile->header->bmin, m_params.cs, m_params.ch,
							    ob->cylinder.pos, ob->cylinder.radius, ob->cylinder.height, 0);
			}
			else if (ob->type == DT_OBSTACLE_BOX)
			{
				dtMarkBoxArea(*bc.layer, tile->header->bmin, m_params.cs, m_params.ch,
					ob->box.bmin, ob->box.bmax, 0);
			}
			else if (ob->type == DT_OBSTACLE_ORIENTED_BOX)
			{
				dtMarkBoxArea(*bc.layer, tile->header->bmin, m_params.cs, m_params.ch,
					ob->orientedBox.center, ob->orientedBox.halfExtents, ob->orientedBox.rotAux, 0);
			}
		}
	}
	
	// Build navmesh
	status = dtBuildTileCacheRegions(m_talloc, *bc.layer, walkableClimbVx);
	if (dtStatusFailed(status))
		return status;

        // 略

}