Editor : Enhanced StepInto & StepOver

Author: P0ulpy

src/Editor/RaycastingCameraViewport.hpp

@@ -27,7 +27,7 @@ class RaycastingCameraViewport
 
     void DrawGUI()
     {
-        ImGui::PushStyleVar(ImGuiStyleVar_WindowPadding, ImVec2(0, 0));
+        ImGui::PushStyleVar(ImGuiStyleVar_WindowPadding, ImVec2(3, 0));
         ImGui::SetNextWindowSizeConstraints(ImVec2(400, 400), ImVec2((float)GetScreenWidth(), (float)GetScreenHeight()));
 
         if (ImGui::Begin("3D View", nullptr, ImGuiWindowFlags_NoScrollbar | ImGuiWindowFlags_MenuBar))

src/Editor/RenderingOrchestrator.hpp

@@ -4,6 +4,7 @@
 #include <vector>
 
 #include "RaycastingCameraViewport.hpp"
+#include "Utils/DrawingHelper.hpp"
 
 class RenderingOrchestrator
 {
@@ -18,23 +19,17 @@ class RenderingOrchestrator
 
         if(play)
         {
-            InitilizeFrame(world, cam);
-
-            if(rasterizer.IsRenderIterationRemains())
+            AllRenderItr(world, cam);
+        }
+        else
+        {
+            switch(invokeEvent)
             {
-                OneRenderItr(true);
+                case StepInto: OneRenderItr(world, cam); break;
+                case StepOver: AllRenderItr(world, cam); break;
             }
 
-            while(rasterizer.IsRenderIterationRemains())
-            {
-                OneRenderItr(false);
-            }
-        }
-        else if(stepByStepNewFrame)
-        {
-            stepByStepNewFrame = false;
-            InitilizeFrame(world, cam);
-            OneRenderItr(true);
+            invokeEvent = None;
         }
     }
 
@@ -64,67 +59,75 @@ class RenderingOrchestrator
         }
     }
 
-    void OneRenderItr(bool firstItr)
+    void AllRenderItr(World &world, RaycastingCamera &cam)
     {
-        if(rasterizer.IsRenderIterationRemains())
+        do
         {
-           auto& renderTexture = cameraViewport.GetRenderTexture();
-     
-            BeginTextureMode(renderTexture);
-
-                if(firstItr)
-                {
-                    ClearBackground(MY_BLACK);
-                }
+            OneRenderItr(world, cam);
+        } while(rasterizer.IsRenderIterationRemains());
+    }
 
-                rasterizer.RenderIteration();
-            EndTextureMode();
+    void OneRenderItr(World &world, RaycastingCamera &cam)
+    {
+        if(!rasterizer.IsRenderIterationRemains())
+        {
+            InitilizeFrame(world, cam);
+        }
 
-            auto& ctx = rasterizer.GetContext();
-            assert(rasterizingItrsTextures.size() >= ctx.currentRenderItr);
+        assert(rasterizer.IsRenderIterationRemains());
 
-            auto& texture = rasterizingItrsTextures.at(ctx.currentRenderItr - 1);
+        auto& renderTexture = cameraViewport.GetRenderTexture();
+        auto& ctx = rasterizer.GetContext();
+    
+        BeginTextureMode(renderTexture);
 
-            if(texture.id == 0)
+            if(ctx.currentRenderItr == 0)
             {
-                texture = LoadRenderTexture(renderTexture.texture.width, renderTexture.texture.height);
+                ClearBackground(MY_BLACK);
             }
 
-            BeginTextureMode(texture);
-                DrawTexture(renderTexture.texture, 0, 0, WHITE);
-            EndTextureMode();
-        }
-        else
+            rasterizer.RenderIteration();
+            
+        EndTextureMode();
+
+        assert(rasterizingItrsTextures.size() >= ctx.currentRenderItr);
+        assert(ctx.currentRenderItr > 0);
+
+        auto& texture = rasterizingItrsTextures.at(ctx.currentRenderItr - 1);
+
+        if(texture.id == 0)
         {
-            stepByStepNewFrame = true;
+            texture = LoadRenderTexture(renderTexture.texture.width, renderTexture.texture.height);
         }
+
+        BeginTextureMode(texture);
+            DrawTextureFlippedY(renderTexture.texture, 0, 0, WHITE);
+        EndTextureMode();
     }
 
     void DrawGUI()
     {
         ImGui::Begin("Rendering");
 
-            if(ImGui::Button("Play"))
+            constexpr const char* LabelPlay = "Play";
+            constexpr const char* LabelPause = "Pause";
+
+            if(ImGui::Button(!play ? LabelPlay : LabelPause))
             {
-                play = true;
+                play = !play;
             } 
             ImGui::SameLine();
-            if(ImGui::Button("Pause"))
-            {
-                play = false;
-                stepByStepNewFrame = true;
-            }
-            ImGui::SameLine();
             if(ImGui::Button("> Step") && !play)
             {
-                OneRenderItr(stepByStepNewFrame);
+                invokeEvent = StepInto;
             }
             ImGui::SameLine();
             if(ImGui::Button(">> Step") && !play)
             {
-
+                invokeEvent = StepOver;
             }
 
+            // Render Iterations UI
             {
                 auto& ctx = rasterizer.GetContext();
 
@@ -145,13 +148,11 @@ class RenderingOrchestrator
 
 private:    
     RaycastingCameraViewport& cameraViewport;
-
-    // Step By step
-    bool play = true;
-    bool stepByStepNewFrame = false;
-
     WorldRasterizer rasterizer;
 
+    bool play = true;
+    enum InvokeEvent { None, StepInto, StepOver };
+    InvokeEvent invokeEvent { None };
     std::vector<RenderTexture> rasterizingItrsTextures;
 };
 

src/Utils/DrawingHelper.hpp

@@ -23,4 +23,13 @@ inline void DrawArrow(Vector2 start, Vector2 end, Color color = RED, float thick
     Vector2 arrowTipB = Vector2Add(arrowTipEnd, Vector2Scale(arrowLeftPerpDirection, arrowTipWidth));
 
     DrawTriangle(end, arrowTipA, arrowTipB, color);
+}
+
+void DrawTextureFlippedY(const Texture2D& texture, int posX, int posY, Color tint)
+{
+    Rectangle sourceRec = { 0.0f, 0.0f, (float)texture.width, (float)-texture.height }; // Flip Y axis
+    Rectangle destRec = { (float)posX, (float)posY, (float)texture.width, (float)texture.height };
+    Vector2 origin = { 0.0f, 0.0f };
+
+    DrawTexturePro(texture, sourceRec, destRec, origin, 0.0f, tint);
 }

vendors/rlImGui/rlImGui.cpp

@@ -616,7 +616,7 @@ void rlImGuiImageRenderTextureFit(const RenderTexture* image, bool center)
         ImGui::SetCursorPosY(ImGui::GetCursorPosY() + (area.y / 2 - sizeY / 2));
     }
 
-    rlImGuiImageRect(&image->texture, sizeX, sizeY, Rectangle{ 0,0, float(image->texture.width), -float(image->texture.height) });
+    rlImGuiImageRect(&image->texture, sizeX, sizeY, Rectangle{ 0, 0, float(image->texture.width), -float(image->texture.height) });
 }
 
 void rlImGuiImageRenderTextureFitWidth(const RenderTexture* image)
@@ -629,7 +629,7 @@ void rlImGuiImageRenderTextureFitWidth(const RenderTexture* image)
 
     ImVec2 area = ImGui::GetContentRegionAvail();
 
-    float scale =  area.x / image->texture.width;
+    float scale = area.x / image->texture.width;
 
     int sizeX = int(image->texture.width * scale);
     int sizeY = int(image->texture.height * scale);