Method Process

Engine/source/EtEditor/Rendering/EditorCamera.cpp:56–121

------------------------------ AudioListenerSystem::Process Update a cameras position according to input

// Update a cameras position according to input
//
void EditorCameraSystem::Process(fw::ComponentRange<EditorCameraSystemView>& range) 
{
	// common variables
	core::InputManager* const input = core::InputManager::GetInstance();
	float const dt = core::ContextManager::GetInstance()->GetActiveContext()->time->DeltaTime();

	for (EditorCameraSystemView& view : range)
	{
		// movement direction
		vec3 move;

		if (view.camera->isEnabled)
		{
			move.x -= (input->GetKeyState(E_KbdKey::A) == E_KeyState::Down) ? 1.0f : 0.0f;
			move.x += (input->GetKeyState(E_KbdKey::D) == E_KeyState::Down) ? 1.0f : 0.0f;

			move.y -= (input->GetKeyState(E_KbdKey::Q) == E_KeyState::Down) ? 1.0f : 0.0f;
			move.y += (input->GetKeyState(E_KbdKey::E) == E_KeyState::Down) ? 1.0f : 0.0f;

			move.z += (input->GetKeyState(E_KbdKey::W) == E_KeyState::Down) ? 1.0f : 0.0f;
			move.z -= (input->GetKeyState(E_KbdKey::S) == E_KeyState::Down) ? 1.0f : 0.0f;
		}

		if (!math::isZero(move))
		{
			move = math::normalize(move);
		}

		//Acceleration
		{
			vec3 const delta = move - view.camera->movement;
			float const acc = s_Accelleration * dt;
			view.camera->movement = view.camera->movement + (delta * math::Clamp01(acc));
		}

		//handle scrolling to change camera speed
		float const scroll = view.camera->isEnabled ? input->GetMouseWheelDelta().y : 0.f;
		if (scroll > 0.0f)
		{
			view.camera->speedMultiplier *= 1.1f;
		}
		else if (scroll < -0.01f)
		{
			view.camera->speedMultiplier *= 0.9f;
		}

		float const currSpeed = s_MoveSpeed * view.camera->speedMultiplier;

		//move relative to cameras view space - luckily the camera already has those inverted matrices calculated
		mat3 const camMat = math::CreateFromMat4(view.camera->renderCamera->GetViewInv());
		view.transform->SetPosition(view.transform->GetPosition() + camMat * view.camera->movement * currSpeed * dt);

		//Rotate
		//******
		vec2 const look = view.camera->isEnabled ? input->GetMouseMove() : vec2();

		view.camera->totalYaw += -look.x * s_RotationSpeed;
		view.camera->totalPitch = math::Clamp(view.camera->totalPitch, math::PI_DIV2, -math::PI_DIV2); // Make sure we can't do a backflip