From 778bdec6d840ff7547cb65cb24fc639c7782fd29 Mon Sep 17 00:00:00 2001
From: Andrew Meadows <andrew@highfidelity.io>
Date: Thu, 6 Mar 2014 12:34:21 -0800
Subject: [PATCH] Model now knows its bounding radius

---
 interface/src/renderer/Model.cpp | 10 +++++++++-
 interface/src/renderer/Model.h   |  6 +++++-
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/interface/src/renderer/Model.cpp b/interface/src/renderer/Model.cpp
index 5055b16c4d..7ef87eaa47 100644
--- a/interface/src/renderer/Model.cpp
+++ b/interface/src/renderer/Model.cpp
@@ -7,6 +7,7 @@
 //
 
 #include <glm/gtx/transform.hpp>
+#include <glm/gtx/norm.hpp>
 
 #include <GeometryUtil.h>
 
@@ -23,7 +24,8 @@ Model::Model(QObject* parent) :
     QObject(parent),
     _shapesAreDirty(true),
     _lodDistance(0.0f),
-    _pupilDilation(0.0f) {
+    _pupilDilation(0.0f),
+    _boundingRadius(0.f) {
     // we may have been created in the network thread, but we live in the main thread
     moveToThread(Application::getInstance()->thread());
 }
@@ -136,6 +138,7 @@ void Model::createCollisionShapes() {
 
 void Model::updateShapePositions() {
     if (_shapesAreDirty && _shapes.size() == _jointStates.size()) {
+        _boundingRadius = 0.f;
         float uniformScale = extractUniformScale(_scale);
         const FBXGeometry& geometry = _geometry->getFBXGeometry();
         for (int i = 0; i < _jointStates.size(); i++) {
@@ -145,7 +148,12 @@ void Model::updateShapePositions() {
             glm::vec3 worldPosition = extractTranslation(_jointStates[i].transform) + jointToShapeOffset + _translation;
             _shapes[i]->setPosition(worldPosition);
             _shapes[i]->setRotation(_jointStates[i].combinedRotation * joint.shapeRotation);
+            float distance2 = glm::distance2(worldPosition, _translation);
+            if (distance2 > _boundingRadius) {
+                _boundingRadius = distance2;
+            }
         }
+        _boundingRadius = sqrtf(_boundingRadius);
         _shapesAreDirty = false;
     }
 }
diff --git a/interface/src/renderer/Model.h b/interface/src/renderer/Model.h
index 4891c86779..88bfbfd3aa 100644
--- a/interface/src/renderer/Model.h
+++ b/interface/src/renderer/Model.h
@@ -172,6 +172,8 @@ public:
     /// Use the collision to affect the model
     void applyCollision(CollisionInfo& collision);
 
+    float getBoundingRadius() const { return _boundingRadius; }
+
 protected:
 
     QSharedPointer<NetworkGeometry> _geometry;
@@ -228,7 +230,7 @@ protected:
     /// Computes and returns the extended length of the limb terminating at the specified joint and starting at the joint's
     /// first free ancestor.
     float getLimbLength(int jointIndex) const;
-    
+
     void applyRotationDelta(int jointIndex, const glm::quat& delta, bool constrain = true);
     
 private:
@@ -257,6 +259,8 @@ private:
     QVector<glm::vec3> _blendedNormals;
     
     QVector<Model*> _attachments;
+
+    float _boundingRadius;
     
     static ProgramObject _program;
     static ProgramObject _normalMapProgram;