added imgui

.gitmodules

@@ -4,3 +4,6 @@
 [submodule "vendor/glm"]
 	path = vendor/glm
 	url = git@github.com:g-truc/glm.git
+[submodule "vendor/imgui"]
+	path = vendor/imgui
+	url = git@github.com:ocornut/imgui.git

CMakeLists.txt

@@ -5,6 +5,8 @@ cmake_minimum_required (VERSION 3.8)
 
 project ("Visualizer")
 
+set(VENDOR_DIR ${CMAKE_SOURCE_DIR}/vendor)
+
 find_package(GLFW3)
 if(NOT GLFW3_FOUND)
 	message(STATUS "Could not find GLFW binaries on system, building from source instead")

src/Application.cpp

@@ -5,6 +5,9 @@
 
 #include <glad/glad.h>
 #include <GLFW/glfw3.h>
+#include "imgui.h"
+#include "backends/imgui_impl_glfw.h"
+#include "backends/imgui_impl_opengl3.h"
 
 #ifdef NDEBUG	
 	#define FULLSCREEN
@@ -12,6 +15,10 @@
 
 Application::~Application()
 {
+	ImGui_ImplOpenGL3_Shutdown();
+	ImGui_ImplGlfw_Shutdown();
+	ImGui::DestroyContext();
+
 	if (cube != nullptr)
 		delete cube;
 
@@ -95,7 +102,20 @@ void Application::Init(int width, int height, const std::string& title)
 		}
 	);
 
+	// Set up ImGui
+	IMGUI_CHECKVERSION();
+	ImGui::CreateContext();
+	ImGuiIO& io = ImGui::GetIO();
+
+	ImGui_ImplGlfw_InitForOpenGL(window, true);
+	ImGui_ImplOpenGL3_Init("#version 460 core");
+
+	ImGui::StyleColorsDark();
+
 	cube = new Cuboid();
+	cubePosition = glm::vec3(0.0f);
+	cubeOrientation = glm::vec3(0.0f);
+	cubeScale = glm::vec3(1.0f);
 }
 
 void Application::Launch()
@@ -104,13 +124,28 @@ void Application::Launch()
 	{
 		glfwPollEvents();
 
-		cube->Rotate(glm::vec3(0.2f, 1.0f, -0.4f), 1.0f);
+		cube->SetPosition(cubePosition);
+		cube->SetRotation(cubeOrientation);
+		cube->SetScale(cubeScale);
 
 		glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
 		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
+		ImGui_ImplOpenGL3_NewFrame();
+		ImGui_ImplGlfw_NewFrame();
+		ImGui::NewFrame();
+
 		cube->Render();
 
+		ImGui::Begin("Debug");
+		ImGui::SliderFloat3("Position", &(cubePosition[0]), -2.0f, 2.0f);
+		ImGui::SliderFloat3("Orientation", &(cubeOrientation[0]), 0.0f, glm::two_pi<float>());
+		ImGui::SliderFloat3("Scale", &(cubeScale[0]), 0.0f, 2.0f);
+		ImGui::End();
+
+		ImGui::Render();
+		ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
+
 		glfwSwapBuffers(window);
 	}
 }

src/Application.hpp

@@ -34,5 +34,6 @@ public:
 private:
 	GLFWwindow* window = nullptr;
 
+	glm::vec3 cubeOrientation, cubePosition, cubeScale;
 	Cuboid* cube;
 };

src/CMakeLists.txt

@@ -3,13 +3,22 @@ add_executable(visualizer
  "backend/VertexArrayObject.cpp" "backend/Shader.cpp"  "Cuboid.cpp" "backend/Drawable.cpp" "backend/Transformable.cpp")
 
 target_sources(visualizer PUBLIC 
-	${CMAKE_SOURCE_DIR}/vendor/glad/src/glad.c
+	${VENDOR_DIR}/glad/src/glad.c
+
+	${VENDOR_DIR}/imgui/backends/imgui_impl_opengl3.cpp
+	${VENDOR_DIR}/imgui/backends/imgui_impl_glfw.cpp
+	${VENDOR_DIR}/imgui/imgui.cpp
+	${VENDOR_DIR}/imgui/imgui_draw.cpp
+	${VENDOR_DIR}/imgui/imgui_tables.cpp
+	${VENDOR_DIR}/imgui/imgui_widgets.cpp
+	${VENDOR_DIR}/imgui/imgui_demo.cpp
 )
 
 target_include_directories(visualizer PRIVATE 
 	${GLFW3_INCLUDE_DIRS}
 	${GLM_INCLUDE_DIRS}
-	${CMAKE_SOURCE_DIR}/vendor/glad/include
+	${VENDOR_DIR}/glad/include
+	${VENDOR_DIR}/imgui
 )
 
 target_link_libraries(visualizer PRIVATE 

src/backend/Transformable.cpp

@@ -46,7 +46,7 @@ void Transformable::Rotate(const glm::vec3& axis, float angle)
 	CalculateTransformationMatrix();
 }
 
-const glm::vec3& Transformable::SetScale()
+const glm::vec3& Transformable::GetScale()
 {
 	return scale;
 }
@@ -66,7 +66,7 @@ void Transformable::Scale(const glm::vec3& factor)
 void Transformable::CalculateTransformationMatrix()
 {
 	transformation = glm::mat4(1.0f);
-	glm::scale(transformation, scale);
+	transformation = glm::translate(transformation, position);
 	transformation *= glm::toMat4(orientation);
-	glm::translate(transformation, position);
+	transformation = glm::scale(transformation, scale);
 }

src/backend/Transformable.hpp

@@ -17,7 +17,7 @@ public:
 	void SetRotation(const glm::vec3& eulerAngles);
 	void Rotate(const glm::vec3& axis, float angle);
 
-	const glm::vec3& SetScale();
+	const glm::vec3& GetScale();
 	void SetScale(const glm::vec3& scale);
 	void Scale(const glm::vec3& factor);
 

vendor/imgui

@@ -0,0 +1 @@
+Subproject commit 4bad852a785d6361ab0744c28f3ca3dbb847a8fc