sms: option to hide simulations

sms/sms/include/simulation.h

@@ -9,6 +9,7 @@ class Simulation {
     std::vector<SpringMassSystem *> m_systems;
     double m_update_rate;
     bool m_paused;
+    bool m_visible;
     bool m_draw_masses;
     bool m_textured;
     bool m_texturable;
@@ -19,6 +20,7 @@ class Simulation {
     public:
         Simulation() :
             m_paused(false),
+            m_visible(true),
             m_draw_masses(true),
             m_textured(false),
             m_texturable(false),
@@ -30,6 +32,7 @@ class Simulation {
             {return &this->m_systems;}
         double update_rate() const {return this->m_update_rate;}
         bool paused() const {return this->m_paused;}
+        bool visible() const {return this->m_visible;}
         bool draw_masses() const {return this->m_draw_masses;}
         bool textured() const {return this->m_textured;}
         bool texturable() const {return this->m_texturable;}
@@ -41,6 +44,7 @@ class Simulation {
             {this->m_systems = v;}
         void set_update_rate(double r) {this->m_update_rate = r;}
         void set_paused(bool p) {this->m_paused = p;}
+        void set_visible(bool v) {this->m_visible = v;}
         void set_draw_masses(bool d) {this->m_draw_masses = d;}
         void set_textured(bool t) {this->m_textured = t;}
         void set_texturable(bool t) {this->m_texturable = t;}

sms/sms/src/display.cpp

@@ -57,7 +57,8 @@ void Display::paintGL() {
         glPopMatrix();
     }
     for(auto x : this->m_simulations)
-        this->draw_simulation(x);
+        if(x->visible())
+            this->draw_simulation(x);
     this->update_fps();
     Rendering::draw_hud(this->m_fps);
 }
@@ -173,6 +174,12 @@ void Display::keyPressEvent(QKeyEvent * event) {
             this->m_ctrl_key_down = true;
             break;
     }
+    if('0' <= event->key() && event->key() <= '9') {
+        unsigned int i = event->key() - '0';
+        if(i < this->m_simulations.size())
+            this->m_simulations[i]->set_visible(
+                !this->m_simulations[i]->visible());
+    }
 }
 
 void Display::keyReleaseEvent(QKeyEvent * event) {

sms/sms/src/main.cpp

@@ -29,6 +29,7 @@ int main(int argc, char ** argv) {
     init_simulations(&simulations, &systems);
     for(auto & x : simulations) {
         x.set_paused(true);
+        x.set_visible(false);
         x.set_update_rate(UPDATE_RATE);
     }
     Display display;