Code restructure of portal render limit handler

2013-02-27 01:14:18 +08:00
parent 82792cf4be
commit f4f3e7791f
3 changed files with 84 additions and 57 deletions
--- a/code/portal_render_limit.js
+++ b/code/portal_render_limit.js
@ -0,0 +1,80 @@
+
+// PORTAL RENDER LIMIT HANDLER ///////////////////////////////////////
+// Functions to handle hiding low level portal when portal render 
+// limit is reached. 
+//
+// After initialized and reset in window.requestData(), portals in 
+// response data will pass to function "pushPortal". Each new portal 
+// not on the map will add 1 to newPortalsPerLevel[portal level].
+//
+// "getMinLevel" will be called by "getMinPortalLevel" in utils_misc.js 
+// to determine min portal level to draw on map.
+// 
+// "getMinLevel" will return minLevel and call "setMinLevel" if 
+// minLevel hasn't set yet. 
+// 
+// In "setMinLevel", it will loop through all portal level from 
+// high to low, and sum total portal count (old + new) to check 
+// minLevel. 
+//
+// In each call of window.handleDataResponse(), it will call 
+// "resetCounting" to reset previous response data. But minLevel
+// is preserved and only replaced when render limit reached in 
+// higher level, until next window.requestData() called and reset.
+// 
+
+window.portalRenderLimit = function() {}
+
+window.portalRenderLimit.initialized = false;
+window.portalRenderLimit.minLevelSet = false;
+window.portalRenderLimit.minLevel = -1;
+window.portalRenderLimit.newPortalsPerLevel = new Array(MAX_PORTAL_LEVEL + 1);
+
+window.portalRenderLimit.init = function () {
+  portalRenderLimit.initialized = true;
+  portalRenderLimit.minLevel = -1;
+  portalRenderLimit.resetCounting();
+}
+
+window.portalRenderLimit.resetCounting = function() {
+  portalRenderLimit.minLevelSet = false;
+  for(var i = 0; i <= MAX_PORTAL_LEVEL; i++) {
+    portalRenderLimit.newPortalsPerLevel[i] = 0;
+  }
+}
+
+window.portalRenderLimit.pushPortal = function(ent) {
+  var portalGuid = ent[0];
+  var portalLevel = parseInt(getPortalLevel(ent[2]));
+  var layerGroup = portalsLayers[portalLevel];
+  
+  if(findEntityInLeaflet(layerGroup, window.portals, ent[0])) return;
+  portalRenderLimit.newPortalsPerLevel[portalLevel]++;
+}
+
+window.portalRenderLimit.getMinLevel = function() {
+  if(!portalRenderLimit.initialized) return -1;
+  if(!portalRenderLimit.minLevelSet) portalRenderLimit.setMinLevel();
+  return portalRenderLimit.minLevel;
+}
+
+window.portalRenderLimit.setMinLevel = function() {
+  var totalPortalsCount = 0;
+  var newMinLevel = MAX_PORTAL_LEVEL + 1;
+  
+  // Find the min portal level under render limit
+  while(newMinLevel > 0) {
+    var oldPortalCount = layerGroupLength(portalsLayers[newMinLevel - 1]);
+    var newPortalCount = portalRenderLimit.newPortalsPerLevel[newMinLevel - 1];
+    totalPortalsCount += oldPortalCount + newPortalCount;
+    if(totalPortalsCount >= MAX_DRAWN_PORTALS)
+      break;
+    newMinLevel--;
+  }
+  
+  // If render limit reached at max portal level, still let portal at max level render
+  newMinLevel = Math.min(newMinLevel, MAX_PORTAL_LEVEL);
+  
+  portalRenderLimit.minLevel = Math.max(newMinLevel, portalRenderLimit.minLevel);
+  portalRenderLimit.minLevelSet = true;
+}