Ability to pause sim

KhronosGroup · Sep 13, 2022 · d3b4be2 · d3b4be2
1 parent ff44fc3
commit d3b4be2
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Showing 2 changed files with 20 additions and 1 deletion.
diff --git a/samples/extensions/khr/conway/main.cpp b/samples/extensions/khr/conway/main.cpp
@@ -57,6 +57,7 @@ class Conway : public cl::sdk::InteropWindow {
               device_id,
               device_type
           }
+        , animating(true)
     {}
 
 protected:
@@ -88,6 +89,7 @@ class Conway : public cl::sdk::InteropWindow {
 
     DoubleBuffer<cl::ImageGL> cl_images;
     cl::vector<cl::Memory> interop_resources;
+    bool animating;
 };
 
 inline bool checkError(const char* Title)
@@ -301,6 +303,7 @@ void Conway::initializeCL()
 
 void Conway::updateScene()
 {
+    if (animating) {
     auto conway =
         cl::KernelFunctor<cl::ImageGL, cl::ImageGL, cl_float2>{ cl_program,
                                                                 "conway" };
@@ -323,6 +326,7 @@ void Conway::updateScene()
     // Swap front and back buffer handles
     std::swap(cl_images.front, cl_images.back);
     std::swap(gl_images.front, gl_images.back);
+    }
 }
 
 void Conway::render()
@@ -351,6 +355,12 @@ void Conway::event(const sf::Event& event)
     switch (event.type)
     {
         case sf::Event::Closed: close(); break;
+        case sf::Event::KeyPressed:
+            if (event.key.code == sf::Keyboard::Key::Space)
+            {
+                animating = !animating;
+            }
+            break;
     }
 }
 

diff --git a/samples/extensions/khr/nbody/main.cpp b/samples/extensions/khr/nbody/main.cpp
@@ -64,7 +64,7 @@ class NBody : public cl::sdk::InteropWindow {
           z_abs_range(32.f), mass_min(100.f), mass_max(500.f),
           RMB_pressed(false),
           dist(std::max({ x_abs_range, y_abs_range, z_abs_range }) * 3), phi(0),
-          theta(0), needMatrixReset(true)
+          theta(0), needMatrixReset(true), animating(true)
     {}
 
 protected:
@@ -115,6 +115,7 @@ class NBody : public cl::sdk::InteropWindow {
     sf::Vector2<int> mousePos; // Variables to enable dragging
     float dist, phi, theta; // Mouse polar coordinates
     bool needMatrixReset; // Whether matrices need to be reset in shaders
+    bool animating;
 
     void
     mouseDrag(const sf::Event::MouseMoveEvent& event); // Handle mouse dragging
@@ -324,6 +325,7 @@ void NBody::initializeCL()
 
 void NBody::updateScene()
 {
+    if (animating){
     auto nbody = cl::KernelFunctor<cl::BufferGL, cl::BufferGL, cl::Buffer,
                                    cl_uint, cl_float>{ cl_program, "nbody" };
     cl::Event acquire, release;
@@ -345,6 +347,7 @@ void NBody::updateScene()
     // Swap front and back buffer handles
     cl_pos_mass.swap();
     gl_pos_mass.swap();
+    }
 }
 
 void NBody::render()
@@ -388,6 +391,12 @@ void NBody::event(const sf::Event& event)
             checkError("glViewport(0, 0, getSize().x, getSize().y)");
             needMatrixReset = true; // projection matrix need to be recalculated
             break;
+        case sf::Event::KeyPressed:
+            if (event.key.code == sf::Keyboard::Key::Space)
+            {
+                animating = !animating;
+            }
+            break;
         case sf::Event::MouseButtonPressed:
             if (event.mouseButton.button == sf::Mouse::Button::Right)
             {