Feedback loop

Nodes/10 Image/Feedback (One frame delay).clbnode

@@ -0,0 +1,8 @@
+// To learn how to write nodes, see https://coollab-art.com/Tutorials/Writing%20Nodes/Intro
+
+INPUT UV->sRGB_StraightA 'Image';
+
+sRGB_StraightA main(UV uv)
+{
+    return vec4(); // Doesn't matter, this node file is just a hack to have a node with the right input and output pins
+}

src/App.cpp

@@ -52,13 +52,13 @@ namespace Lab {
 
 App::App(Cool::WindowManager& windows, Cool::ViewsManager& views)
     : _main_window{windows.main_window()}
-    , _output_view{views.make_view<Cool::RenderView>(Cool::ViewCreationParams{
+    , _output_view{views.make_view<Cool::TextureView>(Cool::ViewCreationParams{
           .name           = Cool::icon_fmt("Output", ICOMOON_IMAGE),
           .is_output_view = true,
           .is_closable    = true,
           .start_open     = false,
       })}
-    , _preview_view{views.make_view<Cool::ForwardingOrRenderView>(
+    , _preview_view{views.make_view<Cool::ForwardingOrTextureView>(
           _output_view,
           Cool::ViewCreationParams{
               .name        = Cool::icon_fmt("View", ICOMOON_IMAGE),
@@ -116,6 +116,9 @@ void App::update()
         initial_project_opening(command_execution_context());
     }
 
+    if (DebugOptions::force_rerender_every_frame())
+        _project.modules_graph->request_rerender_all();
+
     Cool::user_settings().color_themes.update();
 
     _project.audio.set_force_mute(_project.exporter.is_exporting());
@@ -141,16 +144,16 @@ void App::update()
 
     if (inputs_are_allowed()) // Must update() before we render() to make sure the modules are ready (e.g. Nodes need to parse the definitions of the nodes from files)
     {
-        _nodes_library_manager.update(_project.modules_graph->regenerate_code_flag(), _project.modules_graph->graph(), _project.modules_graph->nodes_config(ui(), _project.audio, _nodes_library_manager.library()));
+        _nodes_library_manager.update(_project.modules_graph->rebuild_modules_graph_flag(), _project.modules_graph->graph(), _project.modules_graph->nodes_config(ui(), _project.audio, _nodes_library_manager.library()));
         _project.modules_graph->update();
         check_inputs();
     }
 
     if (!_project.exporter.is_exporting())
     {
         _project.clock.update();
-        render_view().update_size(_project.view_constraint); // TODO(JF) Integrate the notion of View Constraint inside the RenderView ? But that's maybe too much coupling
-        polaroid().render(_project.clock.time(), _project.clock.delta_time());
+        auto const render_size = render_view().desired_image_size(_project.view_constraint); // TODO(JF) Integrate the notion of View Constraint inside the TextureView ? But that's may be too much coupling
+        polaroid().render(render_size, _project.clock.time(), _project.clock.delta_time());
     }
     else
     {
@@ -196,7 +199,7 @@ void App::request_rerender() // TODO(Modules) Sometimes we don't need to call th
     _project.modules_graph->request_rerender_all();
 }
 
-auto App::render_view() -> Cool::RenderView&
+auto App::render_view() -> Cool::TextureView&
 {
     if (_output_view.is_open())
         return _output_view;
@@ -206,14 +209,9 @@ auto App::render_view() -> Cool::RenderView&
 Cool::Polaroid App::polaroid()
 {
     return {
-        .render_target = render_view().render_target(), // TODO(Modules) Each module should have its own render target that it renders on. The views shouldn't have a render target, but receive the one of the top-most module by reference.
-        .render_fn     = [this](Cool::RenderTarget& render_target, Cool::Time time, Cool::Time delta_time) {
-            if (_last_time != time)
-            {
-                _last_time = time;
-                on_time_changed();
-            }
-            render(render_target, time, delta_time);
+        .texture = [this]() { return _project.modules_graph->final_texture(); },
+        .render  = [this](img::Size size, Cool::Time time, Cool::Time delta_time) {
+            render(size, time, delta_time);
         }
     };
 }
@@ -236,11 +234,15 @@ static void imgui_window_console()
 #endif
 }
 
-void App::render(Cool::RenderTarget& render_target, Cool::Time time, Cool::Time delta_time)
+void App::render(img::Size size, Cool::Time time, Cool::Time delta_time)
 {
+    if (_last_time != time)
+    {
+        _last_time = time;
+        on_time_changed();
+    }
     _project.modules_graph->render(
-        render_target,
-        data_to_pass_to_shader(render_target.desired_size(), time, delta_time),
+        data_to_pass_to_shader(size, time, delta_time),
         data_to_generate_shader_code()
     );
 }
@@ -280,10 +282,12 @@ void App::imgui_window_view()
     }
 
     _project.modules_graph->submit_gizmos(_preview_view.gizmos_manager(), command_executor(), _project.camera_2D_manager.camera());
+    _output_view.set_texture(_project.modules_graph->final_texture());
     _output_view.imgui_window({
         .on_open  = [&]() { request_rerender(); }, // When we switch between using the _output_view and the _nodes_view
         .on_close = [&]() { request_rerender(); }, // as our render target, we need to rerender.
     });
+    _preview_view.set_texture(_project.modules_graph->final_texture());
     _preview_view.imgui_window({
         .fullscreen    = view_in_fullscreen,
         .extra_widgets = [&]() {
@@ -354,7 +358,7 @@ void App::imgui_window_meshing()
 {
     _meshing_gui.imgui_window(
         _mesh_export_settings,
-        data_to_pass_to_shader(render_view().render_target().current_size(), _project.clock.time(), _project.clock.delta_time()),
+        data_to_pass_to_shader(render_view().desired_image_size(_project.view_constraint), _project.clock.time(), _project.clock.delta_time()),
         data_to_generate_shader_code()
     );
 }
@@ -405,8 +409,8 @@ void App::imgui_windows_only_when_inputs_are_allowed()
     // Share online
     _gallery_poster.imgui_window([&](img::Size size) {
         auto the_polaroid = polaroid();
-        the_polaroid.render(_project.clock.time(), _project.clock.delta_time(), size);
-        auto const image = the_polaroid.render_target.download_pixels();
+        the_polaroid.render(size, _project.clock.time(), _project.clock.delta_time());
+        auto const image = the_polaroid.texture().download_pixels();
         return img::save_png_to_string(image);
     });
     // Recently opened projects

src/App.h

@@ -8,7 +8,6 @@
 #include <Cool/Gpu/RenderTarget.h>
 #include <Cool/Path/Path.h>
 #include <Cool/Time/Clock_Realtime.h>
-#include <Cool/View/RenderView.h>
 #include <Cool/View/ViewsManager.h>
 #include <Cool/Window/WindowManager.h>
 #include <Nodes/NodesLibraryManager.h>
@@ -35,8 +34,8 @@
 #include "Cool/StrongTypes/Camera2D.h"
 #include "Cool/Time/Clock_Realtime.h"
 #include "Cool/Tips/TipsManager.h"
-#include "Cool/View/ForwardingOrRenderView.h"
-#include "Cool/View/RenderView.h"
+#include "Cool/View/ForwardingOrTextureView.hpp"
+#include "Cool/View/TextureView.hpp"
 #include "Cool/View/ViewsManager.h"
 #include "Cool/Webcam/WebcamsConfigs.h"
 #include "Cool/Window/WindowManager.h"
@@ -78,10 +77,10 @@ class App : public Cool::IApp {
     auto nodes_library() const -> Cool::NodesLibrary const& { return _nodes_library_manager.library(); }
 
 private:
-    void render(Cool::RenderTarget& render_target, Cool::Time time, Cool::Time delta_time);
+    void render(img::Size size, Cool::Time time, Cool::Time delta_time);
     void on_time_changed();
     void on_time_reset();
-    auto render_view() -> Cool::RenderView&;
+    auto render_view() -> Cool::TextureView&;
 
     void check_inputs();
     void check_inputs__history();
@@ -97,7 +96,7 @@ class App : public Cool::IApp {
     auto command_executor                           () { return CommandExecutor{command_execution_context()}; }
     auto system_values                              (img::Size render_target_size, Cool::Time time, Cool::Time delta_time) const { return SystemValues{render_target_size, time, delta_time, _project.camera_2D_manager.camera(), _project.camera_3D_manager.camera(), _project.audio}; }
     auto ui                                         () { return Ui_Ref{command_executor()}; }
-    auto data_to_pass_to_shader                     (img::Size render_target_size, Cool::Time time, Cool::Time delta_time) const { return DataToPassToShader{system_values(render_target_size, time, delta_time),  _project.modules_graph->graph(), _project.modules_graph->compositing_module().feedback_double_buffer() }; }
+    auto data_to_pass_to_shader                     (img::Size render_target_size, Cool::Time time, Cool::Time delta_time) const { return DataToPassToShader{system_values(render_target_size, time, delta_time),  _project.modules_graph->graph() }; }
     auto data_to_generate_shader_code               () const { return DataToGenerateShaderCode{_project.modules_graph->graph(), Cool::GetNodeDefinition_Ref<NodeDefinition>{_nodes_library_manager.library()} }; }
     // clang-format on
 
@@ -123,8 +122,8 @@ class App : public Cool::IApp {
 
 private:
     Cool::Window&                        _main_window;
-    Cool::RenderView&                    _output_view;
-    Cool::ForwardingOrRenderView&        _preview_view; // Must be after _output_view because it stores a reference to it
+    Cool::TextureView&                   _output_view;
+    Cool::ForwardingOrTextureView&       _preview_view; // Must be after _output_view because it stores a reference to it
     Project                              _project{};
     std::optional<std::filesystem::path> _current_project_path{};
     RecentlyOpened                       _recently_opened_projects{};

src/Debug/generate_debug_options.py

@@ -62,6 +62,11 @@ def all_debug_options():
             name_in_ui="Show nodes and links registries",
             available_in_release=True,
         ),
+        DebugOption(
+            name_in_code="force_rerender_every_frame",
+            name_in_ui="Force rerender every frame",
+            available_in_release=True,
+        ),
         DebugOption(
             name_in_code="log_when_rendering",
             name_in_ui="Log when rendering",

src/Debug/generated/DebugOptions.inl

@@ -39,6 +39,7 @@ public:
         }
     }
     [[nodiscard]] static auto show_nodes_and_links_registries() -> bool& { return instance().show_nodes_and_links_registries; }
+    [[nodiscard]] static auto force_rerender_every_frame() -> bool& { return instance().force_rerender_every_frame; }
     [[nodiscard]] static auto log_when_rendering() -> bool& { return instance().log_when_rendering; }
     [[nodiscard]] static auto log_when_updating_particles() -> bool& { return instance().log_when_updating_particles; }
     [[nodiscard]] static auto log_when_compiling_nodes() -> bool& { return instance().log_when_compiling_nodes; }
@@ -90,6 +91,7 @@ private:
         bool show_imgui_demo_window{false};
         bool show_history_window{false};
         bool show_nodes_and_links_registries{false};
+        bool force_rerender_every_frame{false};
         bool log_when_rendering{false};
         bool log_when_updating_particles{false};
         bool log_when_compiling_nodes{false};
@@ -113,6 +115,7 @@ private:
                 ser20::make_nvp("ImGui Demo window", show_imgui_demo_window),
                 ser20::make_nvp("Show history", show_history_window),
                 ser20::make_nvp("Show nodes and links registries", show_nodes_and_links_registries),
+                ser20::make_nvp("Force rerender every frame", force_rerender_every_frame),
                 ser20::make_nvp("Log when rendering", log_when_rendering),
                 ser20::make_nvp("Log when updating particles", log_when_updating_particles),
                 ser20::make_nvp("Log when compiling nodes", log_when_compiling_nodes),
@@ -128,6 +131,7 @@ private:
                 ser20::make_nvp("ImGui Demo window", show_imgui_demo_window),
                 ser20::make_nvp("Show history", show_history_window),
                 ser20::make_nvp("Show nodes and links registries", show_nodes_and_links_registries),
+                ser20::make_nvp("Force rerender every frame", force_rerender_every_frame),
                 ser20::make_nvp("Log when rendering", log_when_rendering),
                 ser20::make_nvp("Log when updating particles", log_when_updating_particles),
                 ser20::make_nvp("Log when compiling nodes", log_when_compiling_nodes),
@@ -150,6 +154,7 @@ private:
         instance().show_imgui_demo_window            = false;
         instance().show_history_window               = false;
         instance().show_nodes_and_links_registries   = false;
+        instance().force_rerender_every_frame        = false;
         instance().log_when_rendering                = false;
         instance().log_when_updating_particles       = false;
         instance().log_when_compiling_nodes          = false;
@@ -218,6 +223,11 @@ private:
             Cool::ImGuiExtras::toggle("Show nodes and links registries", &instance().show_nodes_and_links_registries);
         }
 
+        if (wafl::similarity_match({filter, "Force rerender every frame"}) >= wafl::Matches::Strongly)
+        {
+            Cool::ImGuiExtras::toggle("Force rerender every frame", &instance().force_rerender_every_frame);
+        }
+
         if (wafl::similarity_match({filter, "Log when rendering"}) >= wafl::Matches::Strongly)
         {
             Cool::ImGuiExtras::toggle("Log when rendering", &instance().log_when_rendering);
@@ -308,6 +318,12 @@ private:
             throw 0.f; // To understand why we need to throw, see `toggle_first_option()` in <Cool/DebugOptions/DebugOptionsManager.h>
         }
 
+        if (wafl::similarity_match({filter, "Force rerender every frame"}) >= wafl::Matches::Strongly)
+        {
+            instance().force_rerender_every_frame = !instance().force_rerender_every_frame;
+            throw 0.f; // To understand why we need to throw, see `toggle_first_option()` in <Cool/DebugOptions/DebugOptionsManager.h>
+        }
+
         if (wafl::similarity_match({filter, "Log when rendering"}) >= wafl::Matches::Strongly)
         {
             instance().log_when_rendering = !instance().log_when_rendering;

src/Meshing/MeshingGui.cpp

@@ -26,7 +26,7 @@ static void gen_and_export_mesh(Cool::NodeId const& main_node_id, MeshingSetting
     // auto const node_def   = data_to_generate_shader_code.get_node_definition(maybe_node->id_names());
     // is_shape_3D(node_def->signature());
 
-    auto const maybe_mesh = gen_mesh_from_sdf(main_node_id, meshing_settings, data_to_pass_to_shader, data_to_generate_shader_code);
+    auto const maybe_mesh = gen_mesh_from_sdf(main_node_id, meshing_settings, data_to_pass_to_shader, data_to_generate_shader_code, {}); // TODO(Meshing) We need to generate an entire ModulesGraph, so that we can properly handle the fact that our module might depend on other modules
     if (!maybe_mesh)
         return; // TODO(Meshing) Error message should be handled here
     export_mesh(*maybe_mesh, mesh_export_settings);

src/Meshing/gen_mesh_from_sdf.cpp

@@ -83,10 +83,11 @@ void cool_main()
 }
 
 auto gen_mesh_from_sdf(
-    Cool::NodeId const&             main_node_id,
-    MeshingSettings const&          meshing_settings,
-    DataToPassToShader const&       data_to_pass_to_shader,
-    DataToGenerateShaderCode const& data_to_generate_shader_code
+    Cool::NodeId const&                         main_node_id,
+    MeshingSettings const&                      meshing_settings,
+    DataToPassToShader const&                   data_to_pass_to_shader,
+    DataToGenerateShaderCode const&             data_to_generate_shader_code,
+    std::vector<std::shared_ptr<Module>> const& module_dependencies
 ) -> std::optional<Cool::Mesh>
 {
     if constexpr (COOL_OPENGL_VERSION < 430)
@@ -122,10 +123,13 @@ auto gen_mesh_from_sdf(
     meshing_compute_shader->set_uniform("_step_size", meshing_settings.step_size().x);
 
     {
-        auto dependencies = ModuleDependencies{};
+        auto dependencies            = ModuleDependencies{};
+        auto nodes_that_we_depend_on = std::vector<Cool::NodeId>{}; //  TODO(Meshing) Properly compute the nodes that we depend on
+        for (auto const& [id, _] : data_to_pass_to_shader.nodes_graph.nodes())
+            nodes_that_we_depend_on.emplace_back(id);
         update_dependencies_from_shader_code(dependencies, *shader_code);
-        update_dependencies_from_nodes_graph(dependencies, data_to_pass_to_shader.nodes_graph);
-        set_uniforms_for_shader_based_module(*meshing_compute_shader, dependencies, data_to_pass_to_shader);
+        update_dependencies_from_nodes_graph(dependencies, data_to_pass_to_shader.nodes_graph, nodes_that_we_depend_on);
+        set_uniforms_for_shader_based_module(*meshing_compute_shader, dependencies, data_to_pass_to_shader, module_dependencies, nodes_that_we_depend_on);
     }
 
     meshing_compute_shader->compute(meshing_settings.samples_count);

src/Meshing/gen_mesh_from_sdf.hpp

@@ -7,7 +7,15 @@
 
 namespace Lab {
 
+class Module;
+
 // TODO(Meshing) Return error message in case of failure (tl::expected)
-auto gen_mesh_from_sdf(Cool::NodeId const& main_node_id, MeshingSettings const&, DataToPassToShader const&, DataToGenerateShaderCode const&) -> std::optional<Cool::Mesh>;
+auto gen_mesh_from_sdf(
+    Cool::NodeId const& main_node_id,
+    MeshingSettings const&,
+    DataToPassToShader const&,
+    DataToGenerateShaderCode const&,
+    std::vector<std::shared_ptr<Module>> const& module_dependencies
+) -> std::optional<Cool::Mesh>;
 
 } // namespace Lab

src/Module/Module.cpp

@@ -13,4 +13,11 @@ void Module::log_module_error(Cool::OptionalErrorMessage const& maybe_err, Cool:
     });
 }
 
+auto Module::needs_to_rerender() const -> bool
+{
+    return _needs_to_rerender_flag.is_dirty() || std::any_of(_modules_that_we_depend_on.begin(), _modules_that_we_depend_on.end(), [&](auto&& module) {
+               return module->needs_to_rerender();
+           });
+};
+
 } // namespace Lab