Overhaul ingame camera implementation, much better now.

rwengine/include/objects/VehicleObject.hpp

@@ -82,6 +82,8 @@ public:
 	
 	bool isFlipped() const;
 
+	float getVelocity() const;
+	
 	void ejectAll();
 	
 	GameObject* getOccupant(size_t seat);

rwengine/src/objects/VehicleObject.cpp

@@ -365,6 +365,14 @@ bool VehicleObject::isFlipped() const
 	return up.z <= -0.1f;
 }
 
+float VehicleObject::getVelocity() const
+{
+	if (physVehicle) {
+		return (physVehicle->getCurrentSpeedKmHour()*1000.f)/(60.f*60.f);
+	}
+	return 0.f;
+}
+
 void VehicleObject::setSteeringAngle(float a)
 {
 	steerAngle = a;

rwgame/ingamestate.cpp

@@ -15,11 +15,19 @@
 #include <script/ScriptMachine.hpp>
 #include <dynamics/RaycastCallbacks.hpp>
 
-#define AUTOLOOK_TIME 2.f
+constexpr float kAutoLookTime = 2.f;
+constexpr float kAutolookMinVelocity = 0.2f;
+const float kMaxRotationRate = glm::half_pi<float>();
+const float kCameraPitchLimit = glm::quarter_pi<float>() * 0.5f;
 
 IngameState::IngameState(RWGame* game, bool newgame, const std::string& save)
-    : State(game), started(false), newgame(newgame), save(save),
-	autolookTimer(0.f), camMode(IngameState::CAMERA_NORMAL)
+	: State(game)
+	, started(false)
+	, save(save)
+	, newgame(newgame)
+	, autolookTimer(0.f)
+	, camMode(IngameState::CAMERA_NORMAL)
+	, m_cameraAngles { 0.f, glm::half_pi<float>() }
 {
 }
 
@@ -108,20 +116,24 @@ void IngameState::tick(float dt)
 	autolookTimer = std::max(autolookTimer - dt, 0.f);
 
 	auto player = game->getPlayer();
-	if( player && player->isInputEnabled() && game->hasFocus() )
+	if( player && player->isInputEnabled() )
 	{
-		float qpi = glm::half_pi<float>();
-
 		sf::Vector2f screenSize(getWindow().getSize());
 		sf::Vector2f screenCenter(screenSize / 2.f);
-		sf::Vector2f mousePos(sf::Mouse::getPosition(getWindow()));
-		sf::Vector2f deltaMouse = (mousePos - screenCenter);
-		sf::Vector2f mouseMove(deltaMouse.x / screenSize.x, deltaMouse.y / screenSize.y);
-		sf::Mouse::setPosition(sf::Vector2i(screenCenter), getWindow());
-		
-		if(deltaMouse.x != 0 || deltaMouse.y != 0)
+		sf::Vector2f mouseMove;
+		if (game->hasFocus())
 		{
-			autolookTimer = AUTOLOOK_TIME;
+			sf::Vector2f mousePos(sf::Mouse::getPosition(getWindow()));
+			sf::Vector2f deltaMouse = (mousePos - screenCenter);
+			mouseMove = sf::Vector2f(deltaMouse.x / screenSize.x, deltaMouse.y / screenSize.y);
+			sf::Mouse::setPosition(sf::Vector2i(screenCenter), getWindow());
+
+			if(deltaMouse.x != 0 || deltaMouse.y != 0)
+			{
+				autolookTimer = kAutoLookTime;
+				m_cameraAngles += glm::vec2(mouseMove.x, mouseMove.y);
+				m_cameraAngles.y = glm::clamp(m_cameraAngles.y, kCameraPitchLimit, glm::pi<float>() - kCameraPitchLimit);
+			}
 		}
 
 		float viewDistance = 4.f;
@@ -169,20 +181,36 @@ void IngameState::tick(float dt)
 			targetPosition = vehicle->getPosition();
 			lookTargetPosition = targetPosition;
 			lookTargetPosition.z += (vehicle->info->handling.dimensions.z);
-			targetPosition.z += (vehicle->info->handling.dimensions.z * 2.f);
+			targetPosition.z += (vehicle->info->handling.dimensions.z * 1.f);
 			physTarget = vehicle->physBody;
+			m_cameraAngles.y = glm::half_pi<float>();
+
+			// Rotate the camera to the ideal angle if the player isn't moving it
+			float velocity = vehicle->getVelocity();
+			if (autolookTimer <= 0.f && glm::abs(velocity) > kAutolookMinVelocity)
+			{
+				auto idealAngle = -glm::roll(vehicle->getRotation()) - glm::half_pi<float>();
+				if (velocity < 0.f) {
+					idealAngle = glm::mod(idealAngle - glm::pi<float>(), glm::pi<float>() * 2.f);
+				}
+				float currentAngle = glm::mod(m_cameraAngles.x, glm::pi<float>()*2);
+				float rotation = idealAngle - currentAngle;
+				if (glm::abs(rotation) > glm::pi<float>()) {
+					rotation -= glm::sign(rotation) * glm::pi<float>()*2.f;
+				}
+				m_cameraAngles.x += glm::sign(rotation) * std::min(kMaxRotationRate * dt, glm::abs(rotation));
+			}
 		}
 
 		// Non-topdown camera can orbit
 		if( camMode != IngameState::CAMERA_TOPDOWN )
 		{
-			// Rotate the cameraPosition vector around targetPosition by the mouse movement
-			auto camtotarget = targetPosition - cameraPosition;
-			float camAngle = glm::atan(camtotarget.y, camtotarget.x);
-			glm::quat epsilon( glm::vec3( 0.f, 0.f, camAngle) );
-			glm::quat theta( glm::vec3(0.f, 0.f, -mouseMove.x) );
-			glm::quat rho( epsilon * glm::vec3(0.f, mouseMove.y, 0.f) );
-			cameraPosition = targetPosition - (theta * (rho * camtotarget));
+			// Determine the "ideal" camera position for the current view angles
+			auto yaw = glm::angleAxis(m_cameraAngles.x, glm::vec3(0.f, 0.f,-1.f));
+			auto pitch = glm::angleAxis(m_cameraAngles.y, glm::vec3(0.f,-1.f, 0.f));
+			auto cameraOffset =
+					yaw * pitch * glm::vec3(0.f, 0.f, viewDistance);
+			cameraPosition = targetPosition + cameraOffset;
 		}
 		else
 		{

rwgame/ingamestate.hpp

@@ -27,6 +27,9 @@ class IngameState : public State
 	/** Timer to hold user camera position */
 	float autolookTimer;
 	CameraMode camMode;
+
+	/// Current camera yaw and pitch
+	glm::vec2 m_cameraAngles;
 public:
     /**
      * @brief IngameState