Added include/osg/EarthSky and src/osg/EarthSky to cvs.

Also move osg across to using radians for angular paramters by default.
By defining USE_DEGREES_INTERNALLY you can get the OSG to revert to
the old style degrees. This later feature is deprecated and only meant
for helping comptability in the interim.

ChangeLog

@@ -1,7 +1,20 @@
 OSG Change log
 ==============
 
-
+  o Moved the osg across to using radians for all angular paramters,
+    previously all angular paramters were degrees as per Performer.
+    If the osg is compiled with USE_DEGREES_INTERNALLY defined then
+    the osg will revert to using degrees for anglular paramters,
+    however, this is only a temporary measure to help users port.
+    The inline methods inDegrees(float), and inRadians(float) have
+    been added into osg/Types to make porting easier, these methods
+    covert the specified anglular quantity into the current internal
+    angular units.
+  o Added osg::EarthSky node to support users defined clearing of the
+    color and depth buffers.
+  o Added support for removal of duplicate StateSets using the 
+    osgUtil::OptimizeStateVisitor, previously of removal of duplicate
+    StateAttributes was supported.
   o Made spelling corrections in include/osgDB,osgUtil,osgGLUT,osgWX,
     spelling mistakes picked up by a script written by Neil Salter.
   o Made osg::Matrix::_mat private, and updated the rest of the osg

include/osg/EarthSky

@@ -0,0 +1,49 @@
+#ifndef OSG_EARTHSKY
+#define OSG_EARTHSKY 1
+
+#include <osg/Group>
+#include <osg/Vec4>
+
+namespace osg {
+
+/** EarthSky is a Group node which controls the clearing of the color and depth
+  * buffers at the start of each frame.
+  * The earth sky by default is empty and simply holds the clear color of
+  * the background. However, if the uses wants to add their own clearing of
+  * the color and depth buffers then the children can be added, and the
+  * background clear turned off. The EarthSky by default has StateSet attached
+  * to it which sets the default EarthSky bin number to -1, so that all drawables
+  * below it are placed in a separate bin from the rest of the scene graph, and
+  * are rendered prior to standard opaque and transparent drawables.
+*/
+class SG_EXPORT EarthSky : public Group
+{
+    public :
+        
+        EarthSky();
+
+        META_Node(EarthSky);
+
+	/** Sets the flag which control whether a glClear is required at the beginning of each frame. */
+        inline void setRequiresClear(const bool requiresClear) { _requiresClear = requiresClear; }
+
+	/** Gets the flag which control whether a glClear is required at the beginning of each frame. */
+        inline const bool getRequiresClear() const { return _requiresClear; }
+
+	/** Sets the clear color. */
+        inline void setClearColor(const Vec4& color) { _clearColor = color; }
+
+	/** Returns the clear color. */
+        inline const Vec4& getClearColor() const { return _clearColor; }
+
+    protected :
+    
+        virtual ~EarthSky() {}
+        
+        bool _requiresClear;
+        Vec4 _clearColor;  
+};
+
+};
+
+#endif

include/osg/Types

@@ -22,6 +22,18 @@ typedef uchar ubyte;
 #define M_2_SQRTPI      1.12837916709551257390
 #define M_SQRT2         1.41421356237309504880
 #define M_SQRT1_2       0.70710678118654752440
+#else
+#include <math.h>
+#endif
+
+#define USE_DEGREES_INTERNALLY
+
+#ifdef USE_DEGREES_INTERNALLY
+inline double inDegrees(float angle) { return angle; } 
+inline double inRadians(float angle) { return angle*180.0/M_PI; }
+#else
+inline double inDegrees(float angle) { return angle*M_PI/180.0; }
+inline double inRadians(float angle) { return angle; }
 #endif
 
 };

src/Demos/hangglide/GliderManipulator.cpp

@@ -204,8 +204,8 @@ bool GliderManipulator::calcMovement()
     osg::Vec3 sv = _camera->getSideVector();
     osg::Vec3 lv = _camera->getLookVector();
 
-    float pitch = -dy*0.15f*dt;
-    float roll = -dx*0.1f*dt;
+    float pitch = inDegrees(-dy*0.15f*dt);
+    float roll = inDegrees(-dx*0.1f*dt);
 
     osg::Matrix mat;
     mat.makeTrans(-center);
@@ -214,7 +214,7 @@ bool GliderManipulator::calcMovement()
     if (_yawMode==YAW_AUTOMATICALLY_WHEN_BANKED)
     {
         float bank = asinf(sv.z());
-        float yaw = (-bank*180.0f/M_PI)*dt;
+        float yaw = inRadians(-bank)*dt;
         mat *= Matrix::rotate(yaw,0.0f,0.0f,1.0f);
     }
 

src/Demos/osgcluster/osgcluster.cpp

@@ -336,8 +336,7 @@ int main( int argc, char **argv )
     osg::Timer_t after_load = timer.tick();
     cout << "Time for load = "<<timer.delta_s(before_load,after_load)<<" seconds"<<endl;
 
-    osg::ref_ptr<MySceneView> mySceneView = new MySceneView(viewerMode,socketNumber,camera_fov,camera_offset);
-
+    osg::ref_ptr<MySceneView> mySceneView = new MySceneView(viewerMode,socketNumber,camera_fov,osg::inDegrees(camera_offset));
     mySceneView->setSceneData(rootnode);
 
     // initialize the viewer.

src/Demos/osgcube/osgcube.cpp

@@ -170,7 +170,7 @@ int main( int argc, char **argv )
     myTransform->addChild( createCube() );
     
     // move node in a circle at 90 degrees a sec.
-    myTransform->setAppCallback(new TransformCallback(myTransform,90.0f));
+    myTransform->setAppCallback(new TransformCallback(myTransform,osg::inDegrees(90.0f)));
 
     // create the viewer and the model to it.
     osgGLUT::Viewer viewer;

src/Demos/osgreflect/osgreflect.cpp

@@ -473,7 +473,7 @@ int main( int argc, char **argv )
     osgGLUT::Viewer viewer;
     viewer.addViewport( rootNode );
 
-    loadedModelTransform->setAppCallback(new TransformCallback(loadedModelTransform,45.0f));
+    loadedModelTransform->setAppCallback(new TransformCallback(loadedModelTransform,osg::inDegrees(45.0f)));
 
     // register trackball, flight and drive.
     viewer.registerCameraManipulator(new osgUtil::TrackballManipulator);

src/osg/Billboard.cpp

@@ -10,7 +10,6 @@ using namespace osg;
 Billboard::Billboard()
 {
     _mode = AXIAL_ROT;
-    //    _mode = POINT_ROT_WORLD;
     _axis.set(0.0f,0.0f,1.0f);
 }
 
@@ -85,7 +84,7 @@ void Billboard::calcRotation(const Vec3& eye_local, const Vec3& pos_local,Matrix
             {
                 mat.makeIdent();
                 //float rotation_zrotation_z = atan2f(ev.x(),ev.y());
-                //mat.makeRot(rotation_z*180.0f/M_PI,0.0f,0.0f,1.0f);
+                //mat.makeRot(inRadians(rotation_z),0.0f,0.0f,1.0f);
                 float inv = 1.0f/ev_length;
                 float c = ev.y()*inv;
                 float s = ev.x()*inv;
@@ -123,7 +122,7 @@ void Billboard::calcRotation(const Vec3& eye_local, const Vec3& pos_local,Matrix
                     cp /= cp_len;
 
                     float rotation_cp = acosf(dot);
-                    mat.makeRot(rotation_cp*180.0f/M_PI,cp[0],cp[1],cp[2]);
+                    mat.makeRot(inRadians(rotation_cp),cp[0],cp[1],cp[2]);
                 }
             }
             break;

src/osg/EarthSky.cpp

@@ -0,0 +1,20 @@
+#include "osg/EarthSky"
+
+#include <algorithm>
+
+using namespace osg;
+
+/**
+ * EarthSky constructor.
+ */
+EarthSky::EarthSky()
+{
+    StateSet* stateset = new StateSet;
+    stateset->setRenderBinDetails(-1,"RenderBin");
+    setStateSet(stateset);
+    
+    _requiresClear = true;
+    _clearColor.set(0.0f,0.0f,0.0f,1.0f);  
+
+}
+

src/osg/Matrix.cpp

@@ -14,6 +14,7 @@ using namespace osg;
 #define DEG2RAD(x)    ((x)*M_PI/180.0)
 #define RAD2DEG(x)    ((x)*180.0/M_PI)
 
+
 // temporary #define's for warning that deprecated methods are being
 // used which should be replaced by the new variants.
 #define WARN_DEPRECATED
@@ -33,8 +34,6 @@ using namespace osg;
     #define DEPRECATED(message)
 #endif        
 
-#define ANGLES_IN_DEGREES
-
 
 #define SET_ROW(row, v1, v2, v3, v4 )    \
     _mat[(row)][0] = (v1); \
@@ -168,11 +167,8 @@ void Matrix::makeRot( const Vec3& from, const Vec3& to )
     double d = from * to; // dot product == cos( angle between from & to )
     if( d < 0.9999 ) {
         double angle = acos(d);
-#ifdef ANGLES_IN_DEGREES
-        angle = RAD2DEG(angle);
-#endif
         Vec3 axis = to ^ from; //we know ((to) x (from)) is perpendicular to both
-        makeRot( angle, axis );
+        makeRot( inRadians(angle) , axis );
     }        
     else 
         makeIdent();
@@ -188,7 +184,7 @@ void Matrix::makeRot( float angle, float x, float y, float z ) {
     if( d == 0 )
         return;
 
-#ifdef ANGLES_IN_DEGREES
+#ifdef USE_DEGREES_INTERNALLY
     angle = DEG2RAD(angle);
 #endif
 
@@ -230,7 +226,7 @@ void Matrix::makeRot( const Quat& q ) {
 
 void Matrix::makeRot( float yaw, float pitch, float roll)
 {
-#ifdef ANGLES_IN_DEGREES
+#ifdef USE_DEGREES_INTERNALLY
     yaw = DEG2RAD(yaw);
     pitch = DEG2RAD(pitch);
     roll = DEG2RAD(roll);

src/osgUtil/DriveManipulator.cpp

@@ -405,7 +405,7 @@ bool DriveManipulator::calcMovement()
 
     float dx = _ga_t0->getX()-mx;
 
-    float yaw = dx*0.1f*dt;
+    float yaw = inDegrees(dx*0.1f*dt);
 
     osg::Matrix mat;
     mat.makeTrans(-center.x(),-center.y(),-center.z());

src/osgUtil/FlightManipulator.cpp

@@ -201,8 +201,8 @@ bool FlightManipulator::calcMovement()
     osg::Vec3 sv = _camera->getSideVector();
     osg::Vec3 lv = _camera->getLookVector();
 
-    float pitch = -dy*0.15f*dt;
-    float roll = -dx*0.1f*dt;
+    float pitch = inDegrees(-dy*0.15f*dt);
+    float roll = inDegrees(-dx*0.1f*dt);
 
     osg::Matrix mat;
     mat.makeTrans(-center);
@@ -211,7 +211,7 @@ bool FlightManipulator::calcMovement()
     if (_yawMode==YAW_AUTOMATICALLY_WHEN_BANKED)
     {
         float bank = asinf(sv.z());
-        float yaw = (-bank*180.0f/M_PI)*dt;
+        float yaw = inRadians(-bank)*dt;
         mat *= Matrix::rotate(yaw,0.0f,0.0f,1.0f);
     }
 

src/osgUtil/TrackballManipulator.cpp

@@ -338,7 +338,7 @@ void TrackballManipulator::trackball(osg::Vec3& axis,float& angle, float p1x, fl
      */
     if (t > 1.0) t = 1.0;
     if (t < -1.0) t = -1.0;
-    angle = asin(t) * 180.0f/M_PI;
+    angle = inRadians(asin(t));
 
 }