Added orbit command

src/cmdparser.cpp

@@ -178,6 +178,18 @@ Command* CommandParser::parseCommand()
         paramList->getNumber("duration", duration);
         cmd = new CommandChangeDistance(duration, rate);
     }
+    else if (commandName == "orbit")
+    {
+        double rate = 0.0;
+        double duration = 1.0;
+        Vec3d axis;
+        paramList->getNumber("duration", duration);
+        paramList->getNumber("rate", rate);
+        paramList->getVector("axis", axis);
+        cmd = new CommandOrbit(duration,
+                               Vec3f((float) axis.x, (float) axis.y, (float) axis.z),
+                               (float) rate);
+    }
     else if (commandName == "setposition")
     {
         Vec3d base, offset;

src/command.cpp

@@ -42,7 +42,8 @@ CommandSelect::~CommandSelect()
 
 void CommandSelect::process(Simulation* sim, Renderer* renderer)
 {
-    sim->selectBody(target);
+    Selection sel = sim->findObject(target);
+    sim->setSelection(sel);
 }
 
 
@@ -160,7 +161,7 @@ void CommandSetTimeRate::process(Simulation* sim, Renderer* renderer)
 
 
 ////////////////
-// Change distance command change the distance from the selected object
+// Change distance command: change the distance from the selected object
 
 CommandChangeDistance::CommandChangeDistance(double _duration, double _rate) :
     TimedCommand(_duration),
@@ -174,6 +175,27 @@ void CommandChangeDistance::process(Simulation* sim, Renderer* renderer, double
 }
 
 
+////////////////
+// Oribt command: rotate about the selected object
+
+CommandOrbit::CommandOrbit(double _duration, const Vec3f& axis, float rate) :
+    TimedCommand(_duration),
+    spin(axis * rate)
+{
+}
+
+void CommandOrbit::process(Simulation* sim, Renderer* rend, double t, double dt)
+{
+    float v = spin.length();
+    if (v != 0.0f)
+    {
+        Quatf q;
+        q.setAxisAngle(spin / v, (float) (v * dt));
+        sim->orbit(q);
+    }
+}
+
+
 ////////////////
 // Set position command: set the position of the camera
 
@@ -188,7 +210,7 @@ void CommandSetPosition::process(Simulation* sim, Renderer* renderer)
 
 
 ////////////////
-// Set position command: set the position of the camera
+// Set orientation command: set the orientation of the camera
 
 CommandSetOrientation::CommandSetOrientation(const Vec3f& _axis, float _angle) :
     axis(_axis), angle(_angle)

src/command.h

@@ -174,6 +174,17 @@ class CommandChangeDistance : public TimedCommand
 };
 
 
+class CommandOrbit : public TimedCommand
+{
+ public:
+    CommandOrbit(double _duration, const Vec3f& axis, float rate);
+    void process(Simulation*, Renderer*, double t, double dt);
+
+ private:
+    Vec3f spin;
+};
+
+
 class CommandSetPosition : public InstantaneousCommand
 {
  public: