Added setambientlight command.

src/celengine/cmdparser.cpp

@@ -321,6 +321,12 @@ Command* CommandParser::parseCommand()
         paramList->getNumber("magnitude", mag);
         cmd = new CommandSetVisibilityLimit(mag);
     }
+    else if (commandName == "setambientlight")
+    {
+        double brightness = 0.0;
+        paramList->getNumber("brightness", brightness);
+        cmd = new CommandSetAmbientLight((float) brightness);
+    }
     else
     {
         error("Unknown command name '" + commandName + "'");

src/celengine/command.cpp

@@ -148,6 +148,31 @@ void CommandSynchronous::process(ExecutionEnvironment& env)
 }
 
 
+////////////////
+// Chase command: 
+
+CommandChase::CommandChase()
+{
+}
+
+void CommandChase::process(ExecutionEnvironment& env)
+{
+    env.getSimulation()->chase();
+}
+
+////////////////
+// Lock command:
+
+CommandLock::CommandLock()
+{
+}
+
+void CommandLock::process(ExecutionEnvironment& env)
+{
+    env.getSimulation()->follow();
+}
+
+
 ////////////////
 // Cancel command: cancel a follow or goto command
 
@@ -364,3 +389,19 @@ void CommandSetVisibilityLimit::process(ExecutionEnvironment& env)
     }
     env.getSimulation()->setFaintestVisible(magnitude);
 }
+
+
+////////////////
+// Set ambient light command
+
+CommandSetAmbientLight::CommandSetAmbientLight(float level) :
+    lightLevel(level)
+{
+}
+
+void CommandSetAmbientLight::process(ExecutionEnvironment& env)
+{
+    Renderer* r = env.getRenderer();
+    if (r != NULL)
+        r->setAmbientLightLevel(lightLevel);
+}

src/celengine/command.h

@@ -143,6 +143,28 @@ class CommandSynchronous : public InstantaneousCommand
 };
 
 
+class CommandLock : public InstantaneousCommand
+{
+ public:
+    CommandLock();
+    void process(ExecutionEnvironment&);
+
+ private:
+    int dummy;
+};
+
+
+class CommandChase : public InstantaneousCommand
+{
+ public:
+    CommandChase();
+    void process(ExecutionEnvironment&);
+
+ private:
+    int dummy;
+};
+
+
 class CommandCancel : public InstantaneousCommand
 {
  public:
@@ -300,5 +322,16 @@ class CommandSetVisibilityLimit : public InstantaneousCommand
 };
 
 
+class CommandSetAmbientLight : public InstantaneousCommand
+{
+ public:
+    CommandSetAmbientLight(float);
+    void process(ExecutionEnvironment&);
+
+ private:
+    float lightLevel;
+};
+
+
 
 #endif // _COMMAND_H_