C++ (Cpp) Winding::Valid示例

示例#1

文件： flow.cpp 项目： emileb/XashXT

// AJM: MVD
// =====================================================================================
//  ClipWindingsToBounds
//      clips all the windings with all the planes (including original face) and outputs 
//      what's left int "out"
// =====================================================================================
static void			ClipWindingsToBounds(winding_t *windings, int numwindings, plane_t *bounds, int numbounds, plane_t &original_plane, winding_t **out, int &num_out)
{
	hlassert(windings);
	hlassert(bounds);

	winding_t out_windings[MAX_PORTALS_ON_LEAF];
	num_out = 0;

	int h, i;

	*out = NULL;

	Winding wind;

	for(h = 0; h < numwindings; h++)
	{					
		// For each winding...
		// Create a winding with CWinding

		wind.initFromPoints(windings[h].points, windings[h].numpoints);

		// Clip winding to original plane
		wind.Chop(original_plane.normal, original_plane.dist);

		for(i = 0; i < numbounds, wind.Valid(); i++)
		{
			// For each bound...
			// Chop the winding to the bounds
			wind.Chop(bounds[i].normal, bounds[i].dist);
		}
		
		if(wind.Valid())
		{
			// We have a valid winding, copy to array
			wind.CopyPoints(&out_windings[num_out].points[0], out_windings[num_out].numpoints);

			num_out++;
		}
	}

	if(!num_out)		// Everything was clipped away
		return;

	// Otherwise, create out
	*out = new winding_t[num_out];

	memcpy(*out, out_windings, num_out * sizeof(winding_t));
}