Don't update camera when mouse is over imgui.

examples/14-shadowvolumes/shadowvolumes.cpp

@@ -2027,7 +2027,7 @@ public:
 			s_uniforms.m_time = time;
 
 			// Update camera.
-			cameraUpdate(deltaTime, m_mouseState);
+			cameraUpdate(deltaTime, m_mouseState, ImGui::MouseOverArea() );
 
 			// Set view and projection matrix for view 0.
 			{

examples/16-shadowmaps/shadowmaps.cpp

@@ -2047,7 +2047,7 @@ public:
 			const float deltaTime = float(frameTime/freq);
 
 			// Update camera.
-			cameraUpdate(deltaTime, m_mouseState);
+			cameraUpdate(deltaTime, m_mouseState, ImGui::MouseOverArea() );
 
 			// Update view mtx.
 			cameraGetViewMtx(m_viewState.m_view);

examples/21-deferred/deferred.cpp

@@ -416,14 +416,14 @@ public:
 		if (!entry::processEvents(m_width, m_height, m_debug, m_reset, &m_mouseState) )
 		{
 			imguiBeginFrame(m_mouseState.m_mx
-					, m_mouseState.m_my
-					, (m_mouseState.m_buttons[entry::MouseButton::Left  ] ? IMGUI_MBUT_LEFT   : 0)
-					| (m_mouseState.m_buttons[entry::MouseButton::Right ] ? IMGUI_MBUT_RIGHT  : 0)
-					| (m_mouseState.m_buttons[entry::MouseButton::Middle] ? IMGUI_MBUT_MIDDLE : 0)
-					, m_mouseState.m_mz
-					, uint16_t(m_width)
-					, uint16_t(m_height)
-					);
+				, m_mouseState.m_my
+				, (m_mouseState.m_buttons[entry::MouseButton::Left  ] ? IMGUI_MBUT_LEFT   : 0)
+				| (m_mouseState.m_buttons[entry::MouseButton::Right ] ? IMGUI_MBUT_RIGHT  : 0)
+				| (m_mouseState.m_buttons[entry::MouseButton::Middle] ? IMGUI_MBUT_MIDDLE : 0)
+				, m_mouseState.m_mz
+				, uint16_t(m_width)
+				, uint16_t(m_height)
+				);
 
 			showExampleDialog(this);
 
@@ -437,17 +437,14 @@ public:
 			float time = (float)( (now-m_timeOffset)/freq);
 
 			ImGui::SetNextWindowPos(
-				ImVec2(m_width - m_width / 5.0f - 10.0f, 10.0f)
+				  ImVec2(m_width - m_width / 5.0f - 10.0f, 10.0f)
 				, ImGuiCond_FirstUseEver
-			);
+				);
 			ImGui::SetNextWindowSize(
-				ImVec2(m_width / 5.0f, m_height / 3.0f)
+				  ImVec2(m_width / 5.0f, m_height / 3.0f)
 				, ImGuiCond_FirstUseEver
-			);
-			ImGui::Begin("Settings"
-				, NULL
-				, 0
-			);
+				);
+			ImGui::Begin("Settings", NULL, 0);
 
 			ImGui::SliderInt("Num lights", &m_numLights, 1, 2048);
 			ImGui::Checkbox("Show G-Buffer.", &m_showGBuffer);
@@ -573,7 +570,7 @@ public:
 				}
 
 				// Update camera.
-				cameraUpdate(deltaTime, m_mouseState);
+				cameraUpdate(deltaTime, m_mouseState, ImGui::MouseOverArea() );
 
 				float view[16];
 				cameraGetViewMtx(view);

examples/24-nbody/nbody.cpp

@@ -368,7 +368,7 @@ public:
 				bx::swap(m_prevPositionBuffer0, m_prevPositionBuffer1);
 
 				// Update camera.
-				cameraUpdate(deltaTime, m_mouseState);
+				cameraUpdate(deltaTime, m_mouseState, ImGui::MouseOverArea() );
 
 				float view[16];
 				cameraGetViewMtx(view);

examples/26-occlusion/occlusion.cpp

@@ -203,8 +203,9 @@ public:
 				const float deltaTime = float(frameTime/freq);
 
 				// Update camera.
+				cameraUpdate(deltaTime, m_state.m_mouse, ImGui::MouseOverArea() );
+
 				float view[16];
-				cameraUpdate(deltaTime, m_state.m_mouse);
 				cameraGetViewMtx(view);
 
 				// Set view and projection matrix for view 0.

examples/27-terrain/terrain.cpp

@@ -432,11 +432,11 @@ ExampleTerrain(const char* _name, const char* _description, const char* _url)
 			ImGui::End();
 			imguiEndFrame();
 
+			// Update camera.
+			cameraUpdate(deltaTime, m_mouseState, ImGui::MouseOverArea() );
+
 			if (!ImGui::MouseOverArea() )
 			{
-				// Update camera.
-				cameraUpdate(deltaTime, m_mouseState);
-
 				if (!!m_mouseState.m_buttons[entry::MouseButton::Left])
 				{
 					mousePickTerrain();

examples/29-debugdraw/debugdraw.cpp

@@ -904,7 +904,7 @@ public:
 			const float deltaTime = float(frameTime/freq);
 
 			// Update camera.
-			cameraUpdate(deltaTime, m_mouseState);
+			cameraUpdate(deltaTime, m_mouseState, ImGui::MouseOverArea() );
 
 			float view[16];
 			cameraGetViewMtx(view);

examples/31-rsm/reflectiveshadowmap.cpp

@@ -451,7 +451,7 @@ public:
 			const float deltaTime = float(frameTime/freq);
 
 			// Update camera
-			cameraUpdate(deltaTime*0.15f, m_mouseState);
+			cameraUpdate(deltaTime*0.15f, m_mouseState, ImGui::MouseOverArea() );
 
 			// Set up matrices for gbuffer
 			float view[16];

examples/32-particles/particles.cpp

@@ -333,7 +333,7 @@ public:
 			const double freq = double(bx::getHPFrequency() );
 			const float deltaTime = float(frameTime/freq);
 
-			cameraUpdate(deltaTime, m_mouseState);
+			cameraUpdate(deltaTime, m_mouseState, ImGui::MouseOverArea() );
 
 			float view[16];
 			cameraGetViewMtx(view);

examples/36-sky/sky.cpp

@@ -565,11 +565,8 @@ namespace
 
 				imguiEndFrame();
 
-				if (!ImGui::MouseOverArea())
-				{
-					// Update camera.
-					cameraUpdate(deltaTime, m_mouseState);
-				}
+				// Update camera.
+				cameraUpdate(deltaTime, m_mouseState, ImGui::MouseOverArea() );
 
 				// Set view 0 default viewport.
 				bgfx::setViewRect(0, 0, 0, uint16_t(m_width), uint16_t(m_height));

examples/38-bloom/bloom.cpp

@@ -435,7 +435,7 @@ public:
 				ImGui::End();
 
 				// Update camera.
-				cameraUpdate(deltaTime, m_mouseState);
+				cameraUpdate(deltaTime, m_mouseState, ImGui::MouseOverArea() );
 
 				float view[16];
 				cameraGetViewMtx(view);

examples/39-assao/assao.cpp

@@ -471,7 +471,7 @@ namespace
 				}
 
 				// Update camera
-				cameraUpdate(deltaTime*0.15f, m_mouseState);
+				cameraUpdate(deltaTime*0.15f, m_mouseState, ImGui::MouseOverArea() );
 
 				// Set up matrices for gbuffer
 				cameraGetViewMtx(m_view);

examples/40-svt/svt.cpp

@@ -261,7 +261,7 @@ public:
 				ImGui::End();
 
 				// Update camera.
-				cameraUpdate(deltaTime, m_mouseState);
+				cameraUpdate(deltaTime, m_mouseState, ImGui::MouseOverArea() );
 
 				float view[16];
 				cameraGetViewMtx(view);

examples/41-tess/tess.cpp

@@ -511,11 +511,8 @@ namespace
 
 				ImGui::End();
 
-				if (!ImGui::MouseOverArea() )
-				{
-					// Update camera.
-					cameraUpdate(deltaTime*0.01f, m_mouseState);
-				}
+				// Update camera.
+				cameraUpdate(deltaTime*0.01f, m_mouseState, ImGui::MouseOverArea() );
 
 				bgfx::touch(0);
 				bgfx::touch(1);

examples/common/camera.cpp

@@ -79,13 +79,14 @@ struct Camera
 	{
 		int32_t m_mx;
 		int32_t m_my;
+		int32_t m_mz;
 	};
 
 	Camera()
 	{
 		reset();
 		entry::MouseState mouseState;
-		update(0.0f, mouseState);
+		update(0.0f, mouseState, true);
 
 		cmdAdd("move", cmdMove);
 		inputAddBindings("camBindings", s_camBindings);
@@ -100,8 +101,10 @@ struct Camera
 	{
 		m_mouseNow.m_mx  = 0;
 		m_mouseNow.m_my  = 0;
+		m_mouseNow.m_mz  = 0;
 		m_mouseLast.m_mx = 0;
 		m_mouseLast.m_my = 0;
+		m_mouseLast.m_mz = 0;
 		m_eye.x  =   0.0f;
 		m_eye.y  =   0.0f;
 		m_eye.z  = -35.0f;
@@ -126,8 +129,19 @@ struct Camera
 		m_keys |= _down ? _key : 0;
 	}
 
-	void update(float _deltaTime, const entry::MouseState& _mouseState)
+	void update(float _deltaTime, const entry::MouseState& _mouseState, bool _reset)
 	{
+		if (_reset)
+		{
+			m_mouseLast.m_mx = _mouseState.m_mx;
+			m_mouseLast.m_my = _mouseState.m_my;
+			m_mouseLast.m_mz = _mouseState.m_mz;
+			m_mouseNow  = m_mouseLast;
+			m_mouseDown = false;
+
+			return;
+		}
+
 		if (!m_mouseDown)
 		{
 			m_mouseLast.m_mx = _mouseState.m_mx;
@@ -142,10 +156,15 @@ struct Camera
 			m_mouseNow.m_my = _mouseState.m_my;
 		}
 
+		m_mouseLast.m_mz = m_mouseNow.m_mz;
+		m_mouseNow.m_mz  = _mouseState.m_mz;
+
+		const int32_t deltaZ = float(m_mouseNow.m_mz - m_mouseLast.m_mz);
+
 		if (m_mouseDown)
 		{
-			int32_t deltaX = m_mouseNow.m_mx - m_mouseLast.m_mx;
-			int32_t deltaY = m_mouseNow.m_my - m_mouseLast.m_my;
+			const int32_t deltaX = m_mouseNow.m_mx - m_mouseLast.m_mx;
+			const int32_t deltaY = m_mouseNow.m_my - m_mouseLast.m_my;
 
 			m_horizontalAngle += m_mouseSpeed * float(deltaX);
 			m_verticalAngle   -= m_mouseSpeed * float(deltaY);
@@ -174,63 +193,47 @@ struct Camera
 		const bx::Vec3 right =
 		{
 			bx::sin(m_horizontalAngle - bx::kPiHalf),
-			0,
+			0.0f,
 			bx::cos(m_horizontalAngle - bx::kPiHalf),
 		};
 
 		const bx::Vec3 up = bx::cross(right, direction);
 
+		m_eye = bx::mad(direction, deltaZ * _deltaTime * m_moveSpeed, m_eye);
+
 		if (m_keys & CAMERA_KEY_FORWARD)
 		{
-			const bx::Vec3 pos = m_eye;
-			const bx::Vec3 tmp = bx::mul(direction, _deltaTime * m_moveSpeed);
-
-			m_eye = bx::add(pos, tmp);
+			m_eye = bx::mad(direction, _deltaTime * m_moveSpeed, m_eye);
 			setKeyState(CAMERA_KEY_FORWARD, false);
 		}
 
 		if (m_keys & CAMERA_KEY_BACKWARD)
 		{
-			const bx::Vec3 pos = m_eye;
-			const bx::Vec3 tmp = bx::mul(direction, _deltaTime * m_moveSpeed);
-
-			m_eye = bx::sub(pos, tmp);
+			m_eye = bx::mad(direction, -_deltaTime * m_moveSpeed, m_eye);
 			setKeyState(CAMERA_KEY_BACKWARD, false);
 		}
 
 		if (m_keys & CAMERA_KEY_LEFT)
 		{
-			const bx::Vec3 pos = m_eye;
-			const bx::Vec3 tmp = bx::mul(right, _deltaTime * m_moveSpeed);
-
-			m_eye = bx::add(pos, tmp);
+			m_eye = bx::mad(right, _deltaTime * m_moveSpeed, m_eye);
 			setKeyState(CAMERA_KEY_LEFT, false);
 		}
 
 		if (m_keys & CAMERA_KEY_RIGHT)
 		{
-			const bx::Vec3 pos = m_eye;
-			const bx::Vec3 tmp = bx::mul(right, _deltaTime * m_moveSpeed);
-
-			m_eye = bx::sub(pos, tmp);
+			m_eye = bx::mad(right, -_deltaTime * m_moveSpeed, m_eye);
 			setKeyState(CAMERA_KEY_RIGHT, false);
 		}
 
 		if (m_keys & CAMERA_KEY_UP)
 		{
-			const bx::Vec3 pos = m_eye;
-			const bx::Vec3 tmp = bx::mul(up, _deltaTime * m_moveSpeed);
-
-			m_eye = bx::add(pos, tmp);
+			m_eye = bx::mad(up, _deltaTime * m_moveSpeed, m_eye);
 			setKeyState(CAMERA_KEY_UP, false);
 		}
 
 		if (m_keys & CAMERA_KEY_DOWN)
 		{
-			const bx::Vec3 pos = m_eye;
-			const bx::Vec3 tmp = bx::mul(up, _deltaTime * m_moveSpeed);
-
-			m_eye = bx::sub(pos, tmp);
+			m_eye = bx::mad(up, -_deltaTime * m_moveSpeed, m_eye);
 			setKeyState(CAMERA_KEY_DOWN, false);
 		}
 
@@ -323,7 +326,7 @@ bx::Vec3 cameraGetAt()
 	return s_camera->m_at;
 }
 
-void cameraUpdate(float _deltaTime, const entry::MouseState& _mouseState)
+void cameraUpdate(float _deltaTime, const entry::MouseState& _mouseState, bool _reset)
 {
-	s_camera->update(_deltaTime, _mouseState);
+	s_camera->update(_deltaTime, _mouseState, _reset);
 }

examples/common/camera.h

@@ -43,6 +43,6 @@ bx::Vec3 cameraGetPosition();
 bx::Vec3 cameraGetAt();
 
 ///
-void cameraUpdate(float _deltaTime, const entry::MouseState& _mouseState);
+void cameraUpdate(float _deltaTime, const entry::MouseState& _mouseState, bool _reset = false);
 
 #endif // CAMERA_H_HEADER_GUARD