Fixed floating-point precision issue making the right-side value of a plot sometimes wrap to the left-side value.

Tricky bug, I was calling abs() which resolve to abs(float) under
Windows with the include we have, but abs(int) under Mac/Linux

README.md

@@ -1,11 +1,13 @@
 ImGui
 =====
 
-ImGui is a bloat-free graphical user interface library for C++. It is portable, renderer agnostic and carries minimal amount of dependencies (only 3 files are needed). It is based on an "immediate" graphical user interface paradigm which allows you to build simple user interfaces with ease.
+ImGui is a bloat-free graphical user interface library for C++. It outputs vertex buffers that you can render in your 3D-pipeline enabled application. It is portable, renderer agnostic and carries minimal amount of dependencies (only 3 files are needed). It is based on an "immediate" graphical user interface paradigm which allows you to build simple user interfaces with ease.
 
-ImGui is designed to allow programmers to create "content creation" or "debug" tools (as opposed to tools for the average end-user). It favors simplicity and thus lacks certain features normally found in more high-level libraries, such as string localisation.
+ImGui is designed to enable fast iteration and allow programmers to create "content creation" or "debug" tools (as opposed to tools for the average end-user). It favors simplicity and thus lacks certain features normally found in more high-level libraries, such as string localisation.
 
-After ImGui is setup in your application, you can use it like in this example:
+ImGui is particularly suited to integration in 3D applications, fullscreen applications, embedded applications, games, or any applications on consoles platforms where operating system features are non-standard. 
+
+After ImGui is setup in your engine, you can use it like in this example:
 
 ![screenshot of sample code alongside its output with ImGui](/web/code_sample_01.png?raw=true)
 

examples/directx9_example/main.cpp

@@ -99,55 +99,6 @@ static void ImImpl_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_c
 	}
 }
 
-// Get text data in Win32 clipboard
-static const char* ImImpl_GetClipboardTextFn()
-{
-	static char* buf_local = NULL;
-	if (buf_local)
-	{
-		free(buf_local);
-		buf_local = NULL;
-	}
-
-	if (!OpenClipboard(NULL)) 
-		return NULL;
-
-	HANDLE buf_handle = GetClipboardData(CF_TEXT); 
-	if (buf_handle == NULL)
-		return NULL;
-
-	if (char* buf_global = (char*)GlobalLock(buf_handle))
-		buf_local = strdup(buf_global);
-	GlobalUnlock(buf_handle); 
-	CloseClipboard(); 
-
-	return buf_local;
-}
-
-// Set text data in Win32 clipboard
-static void ImImpl_SetClipboardTextFn(const char* text, const char* text_end)
-{
-	if (!OpenClipboard(NULL))
-		return;
-
-	if (!text_end)
-		text_end = text + strlen(text);
-
-	const int buf_length = (text_end - text) + 1;
-	HGLOBAL buf_handle = GlobalAlloc(GMEM_MOVEABLE, buf_length * sizeof(char)); 
-	if (buf_handle == NULL)
-		return;
-
-	char* buf_global = (char *)GlobalLock(buf_handle); 
-	memcpy(buf_global, text, text_end - text);
-	buf_global[text_end - text] = 0;
-	GlobalUnlock(buf_handle); 
-
-	EmptyClipboard();
-	SetClipboardData(CF_TEXT, buf_handle);
-	CloseClipboard();
-}
-
 HRESULT InitD3D(HWND hWnd)
 {
     if (NULL == (g_pD3D = Direct3DCreate9(D3D_SDK_VERSION)))
@@ -250,8 +201,6 @@ void InitImGui()
 	io.KeyMap[ImGuiKey_Z] = 'Z';
 
 	io.RenderDrawListsFn = ImImpl_RenderDrawLists;
-	io.SetClipboardTextFn = ImImpl_SetClipboardTextFn;
-	io.GetClipboardTextFn = ImImpl_GetClipboardTextFn;
 	
 	// Create the vertex buffer
 	if (g_pd3dDevice->CreateVertexBuffer(10000 * sizeof(CUSTOMVERTEX), D3DUSAGE_DYNAMIC | D3DUSAGE_WRITEONLY, D3DFVF_CUSTOMVERTEX, D3DPOOL_DEFAULT, &g_pVB, NULL) < 0)
@@ -271,6 +220,35 @@ void InitImGui()
 	}
 }
 
+INT64 ticks_per_second = 0;
+INT64 time = 0;
+
+void UpdateImGui()
+{
+	ImGuiIO& io = ImGui::GetIO();
+
+	// Setup timestep
+	INT64 current_time;
+	QueryPerformanceCounter((LARGE_INTEGER *)&current_time); 
+	io.DeltaTime = (float)(current_time - time) / ticks_per_second;
+	time = current_time;
+
+	// Setup inputs
+	// (we already got mouse position, buttons, wheel from the window message callback)
+	BYTE keystate[256];
+	GetKeyboardState(keystate);
+	for (int i = 0; i < 256; i++)
+		io.KeysDown[i] = (keystate[i] & 0x80) != 0;
+	io.KeyCtrl = (keystate[VK_CONTROL] & 0x80) != 0;
+	io.KeyShift = (keystate[VK_SHIFT] & 0x80) != 0;
+	// io.MousePos : filled by WM_MOUSEMOVE event
+	// io.MouseDown : filled by WM_*BUTTON* events
+	// io.MouseWheel : filled by WM_MOUSEWHEEL events
+
+	// Start the frame
+	ImGui::NewFrame();
+}
+
 int WINAPI wWinMain(HINSTANCE hInst, HINSTANCE, LPWSTR, int)
 {
     // Register the window class
@@ -280,101 +258,91 @@ int WINAPI wWinMain(HINSTANCE hInst, HINSTANCE, LPWSTR, int)
     // Create the application's window
     hWnd = CreateWindow(L"ImGui Example", L"ImGui DirectX9 Example", WS_OVERLAPPEDWINDOW, 100, 100, 1280, 800, NULL, NULL, wc.hInstance, NULL);
 
-	INT64 ticks_per_second, time;
 	if (!QueryPerformanceFrequency((LARGE_INTEGER *)&ticks_per_second))
 		return 1;
 	if (!QueryPerformanceCounter((LARGE_INTEGER *)&time))
 		return 1;
 
 	// Initialize Direct3D
-    if (InitD3D(hWnd) >= 0)
+    if (InitD3D(hWnd) < 0)
+	{
+		if (g_pVB)
+			g_pVB->Release();
+	    UnregisterClass(L"ImGui Example", wc.hInstance);
+		return 1;
+	}
+
+	// Show the window
+	ShowWindow(hWnd, SW_SHOWDEFAULT);
+	UpdateWindow(hWnd);
+
+	InitImGui();
+
+    // Enter the message loop
+    MSG msg;
+    ZeroMemory(&msg, sizeof(msg));
+    while (msg.message != WM_QUIT)
     {
-        // Show the window
-        ShowWindow(hWnd, SW_SHOWDEFAULT);
-        UpdateWindow(hWnd);
-
-		InitImGui();
-
-        // Enter the message loop
-        MSG msg;
-        ZeroMemory(&msg, sizeof(msg));
-        while (msg.message != WM_QUIT)
+        if (PeekMessage(&msg, NULL, 0U, 0U, PM_REMOVE))
         {
-            if (PeekMessage(&msg, NULL, 0U, 0U, PM_REMOVE))
-            {
-                TranslateMessage(&msg);
-                DispatchMessage(&msg);
-				continue;
-            }
+            TranslateMessage(&msg);
+            DispatchMessage(&msg);
+			continue;
+        }
 		
-			// 1) ImGui start frame, setup time delta & inputs
-			ImGuiIO& io = ImGui::GetIO();
-			INT64 current_time;
-			QueryPerformanceCounter((LARGE_INTEGER *)&current_time); 
-			io.DeltaTime = (float)(current_time - time) / ticks_per_second;
-			time = current_time;
-			BYTE keystate[256];
-			GetKeyboardState(keystate);
-			for (int i = 0; i < 256; i++)
-				io.KeysDown[i] = (keystate[i] & 0x80) != 0;
-			io.KeyCtrl = (keystate[VK_CONTROL] & 0x80) != 0;
-			io.KeyShift = (keystate[VK_SHIFT] & 0x80) != 0;
-			// io.MousePos : filled by WM_MOUSEMOVE event
-			// io.MouseDown : filled by WM_*BUTTON* events
-			// io.MouseWheel : filled by WM_MOUSEWHEEL events
-			ImGui::NewFrame();
+		UpdateImGui();
 
-			// 2) ImGui usage
-			static bool show_test_window = true;
-			static bool show_another_window = false;
-			static float f;
-			ImGui::Text("Hello, world!");
-			ImGui::SliderFloat("float", &f, 0.0f, 1.0f);
-			show_test_window ^= ImGui::Button("Test Window");
-			show_another_window ^= ImGui::Button("Another Window");
+		// Create a simple window
+		// Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets appears in a window automatically called "Debug"
+		static bool show_test_window = true;
+		static bool show_another_window = false;
+		static float f;
+		ImGui::Text("Hello, world!");
+		ImGui::SliderFloat("float", &f, 0.0f, 1.0f);
+		show_test_window ^= ImGui::Button("Test Window");
+		show_another_window ^= ImGui::Button("Another Window");
 
-			// Calculate and show framerate
-			static float ms_per_frame[120] = { 0 };
-			static int ms_per_frame_idx = 0;
-			static float ms_per_frame_accum = 0.0f;
-			ms_per_frame_accum -= ms_per_frame[ms_per_frame_idx];
-			ms_per_frame[ms_per_frame_idx] = io.DeltaTime * 1000.0f;
-			ms_per_frame_accum += ms_per_frame[ms_per_frame_idx];
-			ms_per_frame_idx = (ms_per_frame_idx + 1) % 120;
-			const float ms_per_frame_avg = ms_per_frame_accum / 120;
-			ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", ms_per_frame_avg, 1000.0f / ms_per_frame_avg);
+		// Calculate and show framerate
+		static float ms_per_frame[120] = { 0 };
+		static int ms_per_frame_idx = 0;
+		static float ms_per_frame_accum = 0.0f;
+		ms_per_frame_accum -= ms_per_frame[ms_per_frame_idx];
+		ms_per_frame[ms_per_frame_idx] = ImGui::GetIO().DeltaTime * 1000.0f;
+		ms_per_frame_accum += ms_per_frame[ms_per_frame_idx];
+		ms_per_frame_idx = (ms_per_frame_idx + 1) % 120;
+		const float ms_per_frame_avg = ms_per_frame_accum / 120;
+		ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", ms_per_frame_avg, 1000.0f / ms_per_frame_avg);
 
-			if (show_test_window)
-			{
-				// More example code in ShowTestWindow()
-				ImGui::SetNewWindowDefaultPos(ImVec2(650, 20));		// Normally user code doesn't need/want to call it because positions are saved in .ini file anyway. Here we just want to make the demo initial state a bit more friendly!
-				ImGui::ShowTestWindow(&show_test_window);
-			}
-
-			if (show_another_window)
-			{
-				ImGui::Begin("Another Window", &show_another_window, ImVec2(200,100));
-				ImGui::Text("Hello");
-				ImGui::End();
-			}
-
-			// 3) Rendering
-			// Clear frame buffer
-		    g_pd3dDevice->SetRenderState(D3DRS_ZENABLE, false);
-			g_pd3dDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, false);
-			g_pd3dDevice->SetRenderState(D3DRS_SCISSORTESTENABLE, false);
-			g_pd3dDevice->Clear(0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, D3DCOLOR_XRGB(204, 153, 153), 1.0f, 0);
-			if (g_pd3dDevice->BeginScene() >= 0)
-			{
-				// Render ImGui
-				ImGui::Render();
-				g_pd3dDevice->EndScene();
-			}
-		    g_pd3dDevice->Present(NULL, NULL, NULL, NULL);
+		// Show the ImGui test window
+		// Most of user example code is in ImGui::ShowTestWindow()
+		if (show_test_window)
+		{
+			ImGui::SetNewWindowDefaultPos(ImVec2(650, 20));		// Normally user code doesn't need/want to call it because positions are saved in .ini file anyway. Here we just want to make the demo initial state a bit more friendly!
+			ImGui::ShowTestWindow(&show_test_window);
 		}
 
-		ImGui::Shutdown();
-    }
+		// Show another simple window
+		if (show_another_window)
+		{
+			ImGui::Begin("Another Window", &show_another_window, ImVec2(200,100));
+			ImGui::Text("Hello");
+			ImGui::End();
+		}
+
+		// Rendering
+		g_pd3dDevice->SetRenderState(D3DRS_ZENABLE, false);
+		g_pd3dDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, false);
+		g_pd3dDevice->SetRenderState(D3DRS_SCISSORTESTENABLE, false);
+		g_pd3dDevice->Clear(0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, D3DCOLOR_XRGB(204, 153, 153), 1.0f, 0);
+		if (g_pd3dDevice->BeginScene() >= 0)
+		{
+			ImGui::Render();
+			g_pd3dDevice->EndScene();
+		}
+		g_pd3dDevice->Present(NULL, NULL, NULL, NULL);
+	}
+
+	ImGui::Shutdown();
 
 	if (g_pVB)
 		g_pVB->Release();

examples/opengl_example/Makefile.Macosx

@@ -5,7 +5,8 @@
 #
 
 CXXFLAGS=-framework OpenGL -framework Cocoa -framework IOKit 
-#CXXFLAGS+=-L/usr/local/Cellar/glew/1.10.0/lib -L/usr/local/Cellar/glfw3/3.0.4/lib
+CXXFLAGS+=-I/usr/local/Cellar/glew/1.10.0/include -I/usr/local/Cellar/glfw3/3.0.4/include
+CXXFLAGS+=-L/usr/local/Cellar/glew/1.10.0/lib -L/usr/local/Cellar/glfw3/3.0.4/lib
 CXXFLAGS+=-lglew -lglfw3
 CXXFLAGS+=-I../../
 CXXFLAGS+= -D__APPLE__

examples/opengl_example/main.cpp

@@ -19,24 +19,26 @@ static void ImImpl_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_c
 	if (cmd_lists_count == 0)
 		return;
 
-	// Setup render state: alpha-blending enabled, no face culling, no depth testing
+	// Setup render state: alpha-blending enabled, no face culling, no depth testing, scissor enabled, vertex/texcoord/color pointers.
 	glEnable(GL_BLEND);
 	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 	glDisable(GL_CULL_FACE);
 	glDisable(GL_DEPTH_TEST);
-	//glEnable(GL_SCISSOR_TEST);
+	glEnable(GL_SCISSOR_TEST);
 	glEnableClientState(GL_VERTEX_ARRAY);
 	glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 	glEnableClientState(GL_COLOR_ARRAY);
 
-	// Bind texture
+	// Setup texture
 	glBindTexture(GL_TEXTURE_2D, fontTex);
 	glEnable(GL_TEXTURE_2D);
 
-	// Setup matrices
+	// Setup orthographic projection matrix
+	const float width = ImGui::GetIO().DisplaySize.x;
+	const float height = ImGui::GetIO().DisplaySize.y;
 	glMatrixMode(GL_PROJECTION);
 	glLoadIdentity();
-	glOrtho(0.0f, ImGui::GetIO().DisplaySize.x, ImGui::GetIO().DisplaySize.y, 0.0f, -1.0f, +1.0f);
+	glOrtho(0.0f, width, height, 0.0f, -1.0f, +1.0f);
 	glMatrixMode(GL_MODELVIEW);
 	glLoadIdentity();
 
@@ -53,7 +55,7 @@ static void ImImpl_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_c
 		const ImDrawCmd* pcmd_end = cmd_list->commands.end();
 		for (const ImDrawCmd* pcmd = cmd_list->commands.begin(); pcmd != pcmd_end; pcmd++)
 		{
-			glScissor((int)pcmd->clip_rect.x, (int)pcmd->clip_rect.y, (int)(pcmd->clip_rect.z - pcmd->clip_rect.x), (int)(pcmd->clip_rect.w - pcmd->clip_rect.y));
+			glScissor((int)pcmd->clip_rect.x, (int)(height - pcmd->clip_rect.w), (int)(pcmd->clip_rect.z - pcmd->clip_rect.x), (int)(pcmd->clip_rect.w - pcmd->clip_rect.y));
 			glDrawArrays(GL_TRIANGLES, vtx_offset, pcmd->vtx_count);
 			vtx_offset += pcmd->vtx_count;
 		}
@@ -71,24 +73,33 @@ static void ImImpl_SetClipboardTextFn(const char* text, const char* text_end)
 	if (!text_end)
 		text_end = text + strlen(text);
 
-	// Add a zero-terminator because glfw function doesn't take a size
-	char* buf = (char*)malloc(text_end - text + 1);
-	memcpy(buf, text, text_end-text);
-	buf[text_end-text] = '\0';
-	glfwSetClipboardString(window, buf);
-	free(buf);
+	if (*text_end == 0)
+	{
+		// Already got a zero-terminator at 'text_end', we don't need to add one
+		glfwSetClipboardString(window, text);
+	}
+	else
+	{
+		// Add a zero-terminator because glfw function doesn't take a size
+		char* buf = (char*)malloc(text_end - text + 1);
+		memcpy(buf, text, text_end-text);
+		buf[text_end-text] = '\0';
+		glfwSetClipboardString(window, buf);
+		free(buf);
+	}
 }
 
+
 // GLFW callbacks to get events
 static void glfw_error_callback(int error, const char* description)
 {
 	fputs(description, stderr);
 }
 
-static float mouse_wheel = 0.0f;
 static void glfw_scroll_callback(GLFWwindow* window, double xoffset, double yoffset)
 {
-	mouse_wheel = (float)yoffset;
+	ImGuiIO& io = ImGui::GetIO();
+	io.MouseWheel = (yoffset != 0.0f) ? yoffset > 0.0f ? 1 : - 1 : 0;			// Mouse wheel: -1,0,+1
 }
 
 static void glfw_key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
@@ -171,37 +182,43 @@ void InitImGui()
 	stbi_image_free(tex_data);
 }
 
-void Shutdown()
+void UpdateImGui()
 {
-	ImGui::Shutdown();
-	glfwTerminate();
+	ImGuiIO& io = ImGui::GetIO();
+
+	// Setup timestep
+	static double time = 0.0f;
+	const double current_time =  glfwGetTime();
+	io.DeltaTime = (float)(current_time - time);
+	time = current_time;
+
+	// Setup inputs
+	// (we already got mouse wheel, keyboard keys & characters from glfw callbacks polled in glfwPollEvents())
+	double mouse_x, mouse_y;
+	glfwGetCursorPos(window, &mouse_x, &mouse_y);
+	io.MousePos = ImVec2((float)mouse_x, (float)mouse_y);                           // Mouse position, in pixels (set to -1,-1 if no mouse / on another screen, etc.)
+	io.MouseDown[0] = glfwGetMouseButton(window, GLFW_MOUSE_BUTTON_LEFT) != 0;
+	io.MouseDown[1] = glfwGetMouseButton(window, GLFW_MOUSE_BUTTON_RIGHT) != 0;
+
+	// Start the frame
+	ImGui::NewFrame();
 }
 
+// Application code
 int main(int argc, char** argv)
 {
 	InitGL();
 	InitImGui();
 
-	double time = glfwGetTime();
 	while (!glfwWindowShouldClose(window))
 	{
 		ImGuiIO& io = ImGui::GetIO();
+		io.MouseWheel = 0;
 		glfwPollEvents();
+		UpdateImGui();
 
-		// 1) ImGui start frame, setup time delta & inputs
-		const double current_time =  glfwGetTime();
-		io.DeltaTime = (float)(current_time - time);
-		time = current_time;
-		double mouse_x, mouse_y;
-		glfwGetCursorPos(window, &mouse_x, &mouse_y);
-		io.MousePos = ImVec2((float)mouse_x, (float)mouse_y);                            // Mouse position, in pixels (set to -1,-1 if no mouse / on another screen, etc.)
-		io.MouseDown[0] = glfwGetMouseButton(window, GLFW_MOUSE_BUTTON_LEFT) != 0;
-		io.MouseDown[1] = glfwGetMouseButton(window, GLFW_MOUSE_BUTTON_RIGHT) != 0;
-		io.MouseWheel = (mouse_wheel != 0) ? mouse_wheel > 0.0f ? 1 : - 1 : 0;            // Mouse wheel: -1,0,+1
-		mouse_wheel = 0.0f;
-		ImGui::NewFrame();
-
-		// 2) ImGui usage
+		// Create a simple window
+		// Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets appears in a window automatically called "Debug"
 		static bool show_test_window = true;
 		static bool show_another_window = false;
 		static float f;
@@ -215,19 +232,21 @@ int main(int argc, char** argv)
 		static int ms_per_frame_idx = 0;
 		static float ms_per_frame_accum = 0.0f;
 		ms_per_frame_accum -= ms_per_frame[ms_per_frame_idx];
-		ms_per_frame[ms_per_frame_idx] = io.DeltaTime * 1000.0f;
+		ms_per_frame[ms_per_frame_idx] = ImGui::GetIO().DeltaTime * 1000.0f;
 		ms_per_frame_accum += ms_per_frame[ms_per_frame_idx];
 		ms_per_frame_idx = (ms_per_frame_idx + 1) % 120;
 		const float ms_per_frame_avg = ms_per_frame_accum / 120;
 		ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", ms_per_frame_avg, 1000.0f / ms_per_frame_avg);
 
+		// Show the ImGui test window
+		// Most of user example code is in ImGui::ShowTestWindow()
 		if (show_test_window)
 		{
-			// More example code in ShowTestWindow()
 			ImGui::SetNewWindowDefaultPos(ImVec2(650, 20));        // Normally user code doesn't need/want to call it because positions are saved in .ini file anyway. Here we just want to make the demo initial state a bit more friendly!
 			ImGui::ShowTestWindow(&show_test_window);
 		}
 
+		// Show another simple window
 		if (show_another_window)
 		{
 			ImGui::Begin("Another Window", &show_another_window, ImVec2(200,100));
@@ -235,15 +254,15 @@ int main(int argc, char** argv)
 			ImGui::End();
 		}
 
-		// 3) Rendering
+		// Rendering
 		glViewport(0, 0, (int)io.DisplaySize.x, (int)io.DisplaySize.y);
 		glClearColor(0.8f, 0.6f, 0.6f, 1.0f);
 		glClear(GL_COLOR_BUFFER_BIT);
 		ImGui::Render();
-
 		glfwSwapBuffers(window);
 	}
 
-	Shutdown();
+	ImGui::Shutdown();
+	glfwTerminate();
 	return 0;
 }

imconfig.h

@@ -4,15 +4,22 @@
 
 #pragma once
 
-//----- Define your own ImVector<> type if you don't want to use the provided implementation defined in imgui.h
+//---- Define your own ImVector<> type if you don't want to use the provided implementation defined in imgui.h
 //#include <vector>
 //#define ImVector	std::vector
 //#define ImVector	MyVector
 
-//----- Define assertion handler. Default to calling assert().
-// #define IM_ASSERT(_EXPR)	MyAssert(_EXPR)
+//---- Define assertion handler. Defaults to calling assert().
+//#define IM_ASSERT(_EXPR)	MyAssert(_EXPR)
 
-//----- Define implicit cast operators to convert back<>forth from your math types and ImVec2/ImVec4.
+//---- Don't implement default clipboard handlers for Windows (so as not to link with OpenClipboard(), etc.)
+//#define IMGUI_DISABLE_WIN32_DEFAULT_CLIPBOARD_FUNCS
+
+//---- If you are loading a custom font, ImGui expect to find a pure white pixel at (0,0)
+// Change it's UV coordinate here if you can't have a white pixel at (0,0)
+//#define IMGUI_FONT_TEX_UV_FOR_WHITE	ImVec2(0.f/256.f,0.f/256.f)
+
+//---- Define implicit cast operators to convert back<>forth from your math types and ImVec2/ImVec4.
 /*
 #define IM_VEC2_CLASS_EXTRA													\
 		ImVec2(const MyVec2& f) { x = f.x; y = f.y; }						\
@@ -23,8 +30,8 @@
 		operator MyVec4() const { return MyVec4(x,y,z,w); }
 */
 
-//----- Freely implement extra functions within the ImGui:: namespace.
-//----- e.g. you can create variants of the ImGui::Value() helper for your low-level math types.
+//---- Freely implement extra functions within the ImGui:: namespace.
+//---- e.g. you can create variants of the ImGui::Value() helper for your low-level math types.
 /*
 namespace ImGui
 {

imgui.h

@@ -85,9 +85,9 @@ public:
 
 	inline void					clear()							{ if (_data) { _size = _capacity = 0; free(_data); _data = NULL; } }
 	inline iterator				begin()							{ return _data; }
-	inline const iterator		begin() const					{ return _data; }
+	inline const_iterator		begin() const					{ return _data; }
 	inline iterator				end()							{ return _data + _size; }
-	inline const iterator		end() const						{ return _data + _size; }
+	inline const_iterator		end() const						{ return _data + _size; }
 	inline value_type&			front()							{ return at(0); }
 	inline const value_type&	front() const					{ return at(0); }
 	inline value_type&			back()							{ IM_ASSERT(_size > 0); return at(_size-1); }
@@ -135,7 +135,7 @@ namespace ImGui
 	bool		GetWindowIsFocused();
 	float		GetWindowWidth();
 	ImVec2		GetWindowPos();														// you should rarely need/care about the window position, but it can be useful if you want to use your own drawing
-	void		SetWindowPos(ImVec2 pos);											// unchecked
+	void		SetWindowPos(const ImVec2& pos);									// set current window pos
 	ImVec2		GetWindowSize();
 	ImVec2		GetWindowContentRegionMin();
 	ImVec2		GetWindowContentRegionMax();
@@ -149,9 +149,14 @@ namespace ImGui
 	float		GetItemWidth();
 	void		PushAllowKeyboardFocus(bool v);
 	void		PopAllowKeyboardFocus();
-	void		PushStyleColor(ImGuiCol idx, ImVec4 col);
+	void		PushStyleColor(ImGuiCol idx, const ImVec4& col);
 	void		PopStyleColor();
 
+	// Tooltip
+	void		SetTooltip(const char* fmt, ...);									// set tooltip under mouse-cursor, typically use with ImGui::IsHovered(). last call wins.
+	void		BeginTooltip();														// use to create full-featured tooltip windows that aren't just text. 
+	void		EndTooltip();
+
 	// Layout
 	void		Separator();														// horizontal line
 	void		SameLine(int column_x = 0, int spacing_w = -1);						// call between widgets to layout them horizontally
@@ -161,8 +166,8 @@ namespace ImGui
 	float		GetColumnOffset(int column_index = -1);
 	void		SetColumnOffset(int column_index, float offset);
 	float		GetColumnWidth(int column_index = -1);
-	ImVec2		GetCursorPos();														// cursor position relative to window position
-	void		SetCursorPos(ImVec2 p);
+	ImVec2		GetCursorPos();														// cursor position is relative to window position
+	void		SetCursorPos(const ImVec2& pos);									// "
 	void		AlignFirstTextHeightToWidgets();									// call once if the first item on the line is a Text() item and you want to vertically lower it to match higher widgets.
 	float		GetTextLineSpacing();
 	float		GetTextLineHeight();
@@ -176,6 +181,7 @@ namespace ImGui
 	// Widgets
 	void		Text(const char* fmt, ...);
 	void		TextV(const char* fmt, va_list args);
+	void		TextColored(const ImVec4& col, const char* fmt, ...);				// shortcut to doing PushStyleColor(ImGuiCol_Text, col); Text(fmt, ...); PopStyleColor();
 	void		TextUnformatted(const char* text, const char* text_end = NULL);		// doesn't require null terminated string if 'text_end' is specified. no copy done to any bounded stack buffer, better for long chunks of text.
 	void		LabelText(const char* label, const char* fmt, ...);
 	void		BulletText(const char* fmt, ...);
@@ -183,16 +189,18 @@ namespace ImGui
 	bool		SmallButton(const char* label);
 	bool		CollapsingHeader(const char* label, const char* str_id = NULL, const bool display_frame = true, const bool default_open = false);
 	bool		SliderFloat(const char* label, float* v, float v_min, float v_max, const char* display_format = "%.3f", float power = 1.0f);
+	bool		SliderFloat2(const char* label, float v[2], float v_min, float v_max, const char* display_format = "%.3f", float power = 1.0f);
 	bool		SliderFloat3(const char* label, float v[3], float v_min, float v_max, const char* display_format = "%.3f", float power = 1.0f);
 	bool		SliderAngle(const char* label, float* v, float v_degrees_min = -360.0f, float v_degrees_max = +360.0f);		// *v in radians
 	bool		SliderInt(const char* label, int* v, int v_min, int v_max, const char* display_format = "%.0f");
-	void		PlotLines(const char* label, const float* values, int values_count, int values_offset = 0, const char* overlay_text = NULL, float scale_min = FLT_MAX, float scale_max = FLT_MAX, ImVec2 graph_size = ImVec2(0,0));
-	void		PlotHistogram(const char* label, const float* values, int values_count, int values_offset = 0, const char* overlay_text = NULL, float scale_min = FLT_MAX, float scale_max = FLT_MAX, ImVec2 graph_size = ImVec2(0,0));
+	void		PlotLines(const char* label, const float* values, int values_count, int values_offset = 0, const char* overlay_text = NULL, float scale_min = FLT_MAX, float scale_max = FLT_MAX, ImVec2 graph_size = ImVec2(0,0), size_t stride = sizeof(float));
+	void		PlotHistogram(const char* label, const float* values, int values_count, int values_offset = 0, const char* overlay_text = NULL, float scale_min = FLT_MAX, float scale_max = FLT_MAX, ImVec2 graph_size = ImVec2(0,0), size_t stride = sizeof(float));
 	void		Checkbox(const char* label, bool* v);
 	void		CheckboxFlags(const char* label, unsigned int* flags, unsigned int flags_value);
 	bool		RadioButton(const char* label, bool active);
 	bool		RadioButton(const char* label, int* v, int v_button);
 	bool		InputFloat(const char* label, float* v, float step = 0.0f, float step_fast = 0.0f, int decimal_precision = -1);
+	bool		InputFloat2(const char* label, float v[2], int decimal_precision = -1);
 	bool		InputFloat3(const char* label, float v[3], int decimal_precision = -1);
 	bool		InputInt(const char* label, int* v, int step = 1, int step_fast = 100);
 	bool		InputText(const char* label, char* buf, size_t buf_size, ImGuiInputTextFlags flags = 0);
@@ -227,10 +235,11 @@ namespace ImGui
 	void		LogToClipboard(int max_depth = -1);
 
 	// Utilities
-	void		SetTooltip(const char* fmt, ...);									// set tooltip under mouse-cursor, typically use with ImGui::IsHovered(). (currently no contention handling, last call win)
-	void		SetNewWindowDefaultPos(ImVec2 pos);									// set position of window that do
+	void		SetNewWindowDefaultPos(const ImVec2& pos);							// set position of window that do
 	bool		IsHovered();														// was the last item active area hovered by mouse?
-	bool		IsClipped(ImVec2 item_size);										// to perform coarse clipping on user's side (as an optimisation)
+	ImVec2		GetItemBoxMin();													// get bounding box of last item
+	ImVec2		GetItemBoxMax();													// get bounding box of last item
+	bool		IsClipped(const ImVec2& item_size);									// to perform coarse clipping on user's side (as an optimisation)
 	bool		IsKeyPressed(int key_index, bool repeat = true);					// key_index into the keys_down[512] array, imgui doesn't know the semantic of each entry
 	bool		IsMouseClicked(int button, bool repeat = false);
 	bool		IsMouseDoubleClicked(int button);
@@ -380,14 +389,20 @@ struct ImGuiIO
 	bool		FontAllowScaling;			// = false					// Set to allow scaling text with CTRL+Wheel.
 	float		PixelCenterOffset;			// = 0.5f					// Set to 0.0f for DirectX <= 9, 0.5f for Direct3D >= 10 and OpenGL.
 
-	// Settings - Functions (fill once)
-	void		(*RenderDrawListsFn)(ImDrawList** const draw_lists, int count);	// Required
-	const char*	(*GetClipboardTextFn)();										// Required for clipboard support
-	void		(*SetClipboardTextFn)(const char* text, const char* text_end);	// Required for clipboard support (nb- the string is *NOT* zero-terminated at 'text_end')
+	// Settings - Rendering function (REQUIRED)
+	// See example code if you are unsure of how to implement this.
+	void		(*RenderDrawListsFn)(ImDrawList** const draw_lists, int count);
+
+	// Settings - Clipboard Support
+	// Override to provide your clipboard handlers.
+	// On Windows architecture, defaults to use the native Win32 clipboard, otherwise default to use a ImGui private clipboard. 
+	// NB- for SetClipboardTextFn, the string is *NOT* zero-terminated at 'text_end'
+	const char*	(*GetClipboardTextFn)();										
+	void		(*SetClipboardTextFn)(const char* text, const char* text_end);
 
 	// Input - Fill before calling NewFrame()
 	ImVec2		MousePos;					// Mouse position, in pixels (set to -1,-1 if no mouse / on another screen, etc.)
-	bool		MouseDown[2];				// Mouse buttons
+	bool		MouseDown[5];				// Mouse buttons. ImGui itself only uses button 0 (left button) but you can use others as storage for convenience.
 	int			MouseWheel;					// Mouse wheel: -1,0,+1
 	bool		KeyCtrl;					// Keyboard modifier pressed: Control
 	bool		KeyShift;					// Keyboard modifier pressed: Shift
@@ -404,11 +419,11 @@ struct ImGuiIO
 	// [Internal] ImGui will maintain those fields for you
 	ImVec2		MousePosPrev;
 	ImVec2		MouseDelta;
-	bool		MouseClicked[2];
-	ImVec2		MouseClickedPos[2];
-	float		MouseClickedTime[2];
-	bool		MouseDoubleClicked[2];
-	float		MouseDownTime[2];
+	bool		MouseClicked[5];
+	ImVec2		MouseClickedPos[5];
+	float		MouseClickedTime[5];
+	bool		MouseDoubleClicked[5];
+	float		MouseDownTime[5];
 	float		KeysDownTime[512];
 
 	ImGuiIO();
@@ -505,8 +520,8 @@ struct ImDrawCmd
 	ImVec4			clip_rect;
 };
 
-#ifndef IMDRAW_TEX_UV_FOR_WHITE
-#define IMDRAW_TEX_UV_FOR_WHITE	ImVec2(0,0)
+#ifndef IMGUI_FONT_TEX_UV_FOR_WHITE
+#define IMGUI_FONT_TEX_UV_FOR_WHITE	ImVec2(0.f,0.f)
 #endif
 
 // sizeof() == 20
@@ -521,8 +536,11 @@ struct ImDrawVert
 // User is responsible for providing a renderer for this in ImGuiIO::RenderDrawListFn
 struct ImDrawList
 {
-	ImVector<ImDrawCmd>		commands;
+	// This is what you have to render
+	ImVector<ImDrawCmd>		commands;			// commands
 	ImVector<ImDrawVert>	vtx_buffer;			// each command consume ImDrawCmd::vtx_count of those
+
+	// [Internal to ImGui]
 	ImVector<ImVec4>		clip_rect_stack;	// [internal] clip rect stack while building the command-list (so text command can perform clipping early on)
 	ImDrawVert*				vtx_write;			// [internal] point within vtx_buffer after each add command (to avoid using the ImVector<> operators too much)