WIP adding directory structure

kraken/nodes/KRLODSet.cpp

@@ -0,0 +1,149 @@
+//
+//  KRLODSet.cpp
+//  Kraken Engine
+//
+//  Copyright 2024 Kearwood Gilbert. All rights reserved.
+//  
+//  Redistribution and use in source and binary forms, with or without modification, are
+//  permitted provided that the following conditions are met:
+//  
+//  1. Redistributions of source code must retain the above copyright notice, this list of
+//  conditions and the following disclaimer.
+//  
+//  2. Redistributions in binary form must reproduce the above copyright notice, this list
+//  of conditions and the following disclaimer in the documentation and/or other materials
+//  provided with the distribution.
+//  
+//  THIS SOFTWARE IS PROVIDED BY KEARWOOD GILBERT ''AS IS'' AND ANY EXPRESS OR IMPLIED
+//  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+//  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL KEARWOOD GILBERT OR
+//  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+//  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+//  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+//  ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+//  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+//  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//  
+//  The views and conclusions contained in the software and documentation are those of the
+//  authors and should not be interpreted as representing official policies, either expressed
+//  or implied, of Kearwood Gilbert.
+//
+
+#include "KRLODSet.h"
+#include "KRLODGroup.h"
+#include "KRContext.h"
+
+/* static */
+void KRLODSet::InitNodeInfo(KrNodeInfo* nodeInfo)
+{
+  KRNode::InitNodeInfo(nodeInfo);
+  // No additional members
+}
+
+KRLODSet::KRLODSet(KRScene& scene, std::string name) : KRNode(scene, name)
+{
+
+}
+
+KRLODSet::~KRLODSet()
+{}
+
+std::string KRLODSet::getElementName()
+{
+  return "lod_set";
+}
+
+tinyxml2::XMLElement* KRLODSet::saveXML(tinyxml2::XMLNode* parent)
+{
+  tinyxml2::XMLElement* e = KRNode::saveXML(parent);
+
+  return e;
+}
+
+void KRLODSet::loadXML(tinyxml2::XMLElement* e)
+{
+  KRNode::loadXML(e);
+}
+
+
+void KRLODSet::updateLODVisibility(const KRViewport& viewport)
+{
+  if (m_lod_visible >= LOD_VISIBILITY_PRESTREAM) {
+    /*
+    // FINDME, TODO, HACK - Disabled streamer delayed LOD load due to performance issues:
+    KRLODGroup *new_active_lod_group = NULL;
+    */
+
+    // Upgrade and downgrade LOD groups as needed
+    
+    for (KRNode* childNode = m_firstChildNode; childNode != nullptr; childNode = childNode->m_nextNode) {
+      KRLODGroup* lod_group = dynamic_cast<KRLODGroup*>(childNode);
+      assert(lod_group != NULL);
+      LodVisibility group_lod_visibility = KRMIN(lod_group->calcLODVisibility(viewport), m_lod_visible);
+      /*
+      // FINDME, TODO, HACK - Disabled streamer delayed LOD load due to performance issues:
+        if(group_lod_visibility == LOD_VISIBILITY_VISIBLE) {
+            new_active_lod_group = lod_group;
+        }
+        */
+      lod_group->setLODVisibility(group_lod_visibility);
+    }
+
+    /*
+    // FINDME, TODO, HACK - Disabled streamer delayed LOD load due to performance issues:
+    bool streamer_ready = false;
+    if(new_active_lod_group == NULL) {
+        streamer_ready = true;
+    } else if(new_active_lod_group->getStreamLevel(viewport) >= kraken_stream_level::STREAM_LEVEL_IN_LQ) {
+        streamer_ready = true;
+    }
+    */
+    bool streamer_ready = true;
+
+    if (streamer_ready) {
+      // Upgrade and downgrade LOD groups as needed
+      for (KRNode* childNode = m_firstChildNode; childNode != nullptr; childNode = childNode->m_nextNode) {
+        KRLODGroup* lod_group = dynamic_cast<KRLODGroup*>(childNode);
+        assert(lod_group != NULL);
+        LodVisibility group_lod_visibility = KRMIN(lod_group->calcLODVisibility(viewport), m_lod_visible);
+        lod_group->setLODVisibility(group_lod_visibility);
+      }
+    }
+
+    KRNode::updateLODVisibility(viewport);
+  }
+}
+
+void KRLODSet::setLODVisibility(KRNode::LodVisibility lod_visibility)
+{
+  if (lod_visibility == LOD_VISIBILITY_HIDDEN) {
+    KRNode::setLODVisibility(lod_visibility);
+  } else if (m_lod_visible != lod_visibility) {
+    // Don't automatically recurse into our children, as only one of those will be activated, by updateLODVisibility
+    if (m_lod_visible == LOD_VISIBILITY_HIDDEN && lod_visibility >= LOD_VISIBILITY_PRESTREAM) {
+      getScene().notify_sceneGraphCreate(this);
+    }
+    m_lod_visible = lod_visibility;
+  }
+}
+
+kraken_stream_level KRLODSet::getStreamLevel(const KRViewport& viewport)
+{
+  KRLODGroup* new_active_lod_group = NULL;
+
+  // Upgrade and downgrade LOD groups as needed
+  for (KRNode* childNode = m_firstChildNode; childNode != nullptr; childNode = childNode->m_nextNode) {
+    KRLODGroup* lod_group = dynamic_cast<KRLODGroup*>(childNode);
+    assert(lod_group != NULL);
+    if (lod_group->calcLODVisibility(viewport) == LOD_VISIBILITY_VISIBLE) {
+      new_active_lod_group = lod_group;
+    }
+  }
+
+  if (new_active_lod_group) {
+    return new_active_lod_group->getStreamLevel(viewport);
+  } else {
+    return kraken_stream_level::STREAM_LEVEL_IN_HQ;
+  }
+}
+