feat: automatic animation

src/morphist_viewer.cpp

@@ -51,12 +51,10 @@ void MorphistViewer::process_imgui()
 
     ImGui::Text("%s", this->mesh2_path.filename().c_str());
 
-
     ImGui::Dummy(ImVec2(0.0f, 10.0f));
 
     ImGui::SeparatorText("Pre-Compute");
 
-
     ImGui::Spacing();
 
     if (ImGui::InputInt("Resolution", &this->bake_resolution, 1))
@@ -79,17 +77,13 @@ void MorphistViewer::process_imgui()
         this->is_baking = false;
         this->is_mesh_baked = true;
 
-        SDF sdf_final = morpher.morphing_sdf(morph_percentage);
-        mesh_ = morpher.reconstruct_surfaces(sdf_final);
-        pmp::BoundingBox bb = bounds(mesh_);
-        pmp::flip_faces(mesh_);
+        update_morph();
 
+        pmp::BoundingBox bb = bounds(mesh_);
         set_scene((pmp::vec3)bb.center(), 0.5 * bb.size());
-
-        update_mesh();
     }
 
-    if (ImGui::Button("Bake"))
+    if (ImGui::Button("Bake", ImVec2(300, 20)))
     {
         this->is_baking = true;
         ImGui::SameLine();
@@ -102,26 +96,31 @@ void MorphistViewer::process_imgui()
 
     ImGui::SeparatorText("Morphing");
 
-    if (ImGui::SliderFloat("##", &morph_percentage, 0.0f, 1.0f))
+    if (ImGui::SliderFloat("Percentage", &morph_percentage, 0.0f, 1.0f))
     {
-        SDF sdf_final = morpher.morphing_sdf(morph_percentage);
-        mesh_ = morpher.reconstruct_surfaces(sdf_final);
-        pmp::flip_faces(mesh_);
-
-        update_mesh();
+        this->is_morph_playing = false;
+        update_morph();
     }
+    
+    ImGui::Spacing();
+    ImGui::Separator();
+    ImGui::Spacing();
 
-    if (this->is_morph_playing)
+    if (ImGui::Button(this->is_morph_playing ? "Pause" : "Play", ImVec2(300, 20)))
     {
-        if (ImGui::Button("Pause"))
-        {
-            this->is_morph_playing = false;
-        }
+        this->is_morph_playing = !this->is_morph_playing;
     }
-    else if (ImGui::Button("Play"))
+
+    ImGui::SliderFloat("Speed", &this->animation_speed, 0.0, 5.0);
+
+    if (is_morph_playing)
     {
-        this->is_morph_playing = true;
+        animation_driver += ImGui::GetIO().DeltaTime * animation_speed;
+        this->morph_percentage = cos(animation_driver + M_PI) * 0.5 + 0.5;
+
+        update_morph();
     }
+
     ImGui::EndDisabled();
 
     show_help();
@@ -168,6 +167,11 @@ void MorphistViewer::show_help()
     }
 }
 
-void MorphistViewer::mouse(int button, int action, int mods)
+void MorphistViewer::update_morph()
 {
+    SDF sdf_final = morpher.morphing_sdf(morph_percentage);
+    mesh_ = morpher.reconstruct_surfaces(sdf_final);
+    pmp::flip_faces(mesh_);
+
+    update_mesh();
 }

src/morphist_viewer.hpp

@@ -16,9 +16,6 @@ public:
     MorphistViewer(const char* title, int width, int height);
 
 protected:
-    //! this function handles mouse button presses
-    void mouse(int button, int action, int mods) override;
-
     //! draw the scene in different draw modes
     void process_imgui() override;
 
@@ -26,6 +23,8 @@ protected:
 
     void show_help();
 
+    void update_morph();
+
 private:
     
     bool is_baking = false;
@@ -37,4 +36,6 @@ private:
 
     // Between 0 and 1
     float morph_percentage = 0.0f;
+    float animation_driver = 0.0f;
+    float animation_speed = 1.0f;
 };
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