allocate memory for big temporary storage arrays rather than using the

[xonotic/darkplaces.git] / model_brush.c

diff --git a/model_brush.c b/model_brush.c
index f58d7a944b22bdf113c35c8eb0292297715d140b..6fbad625487a50d52a426e1fbb6754f367607778 100644 (file)
--- a/model_brush.c
+++ b/model_brush.c
@@ -3140,6 +3140,9 @@ static void RemovePortalFromNodes(portal_t *portal)
 }
 
 #define PORTAL_DIST_EPSILON (1.0 / 32.0)
+static double *portalpointsbuffer;
+static int portalpointsbufferoffset;
+static int portalpointsbuffersize;
 static void Mod_Q1BSP_RecursiveNodePortals(mnode_t *node)
 {
        int i, side;
@@ -3147,12 +3150,23 @@ static void Mod_Q1BSP_RecursiveNodePortals(mnode_t *node)
        mplane_t clipplane, *plane;
        portal_t *portal, *nextportal, *nodeportal, *splitportal, *temp;
        int numfrontpoints, numbackpoints;
-       double frontpoints[3*MAX_PORTALPOINTS], backpoints[3*MAX_PORTALPOINTS];
+       double *frontpoints, *backpoints;
 
        // if a leaf, we're done
        if (!node->plane)
                return;
 
+       // get some space for our clipping operations to use
+       if (portalpointsbuffersize < portalpointsbufferoffset + 6*MAX_PORTALPOINTS)
+       {
+               portalpointsbuffersize = portalpointsbufferoffset * 2;
+               portalpointsbuffer = Mem_Realloc(loadmodel->mempool, portalpointsbuffer, portalpointsbuffersize * sizeof(*portalpointsbuffer));
+       }
+       frontpoints = portalpointsbuffer + portalpointsbufferoffset;
+       portalpointsbufferoffset += 3*MAX_PORTALPOINTS;
+       backpoints = portalpointsbuffer + portalpointsbufferoffset;
+       portalpointsbufferoffset += 3*MAX_PORTALPOINTS;
+
        plane = node->plane;
 
        front = node->children[0];
@@ -3270,12 +3284,21 @@ static void Mod_Q1BSP_RecursiveNodePortals(mnode_t *node)
 
        Mod_Q1BSP_RecursiveNodePortals(front);
        Mod_Q1BSP_RecursiveNodePortals(back);
+
+       portalpointsbufferoffset -= 6*MAX_PORTALPOINTS;
 }
 
 static void Mod_Q1BSP_MakePortals(void)
 {
        Mem_ExpandableArray_NewArray(&portalarray, loadmodel->mempool, sizeof(portal_t), 1020*1024/sizeof(portal_t));
+       portalpointsbufferoffset = 0;
+       portalpointsbuffersize = 6*MAX_PORTALPOINTS*128;
+       portalpointsbuffer = Mem_Alloc(loadmodel->mempool, portalpointsbuffersize * sizeof(*portalpointsbuffer));
        Mod_Q1BSP_RecursiveNodePortals(loadmodel->brush.data_nodes + loadmodel->brushq1.hulls[0].firstclipnode);
+       Mem_Free(portalpointsbuffer);
+       portalpointsbuffer = NULL;
+       portalpointsbufferoffset = 0;
+       portalpointsbuffersize = 0;
        Mod_Q1BSP_FinalizePortals();
        Mem_ExpandableArray_FreeArray(&portalarray);
 }