feat(view): Add ability to rotate the camera in 45 degree increments using the mouse (#1848)

The view can be rotated in 45 degree increments by holding the CTRL modifier key while pressing the middle mouse button and moving the cursor

Author: Stubbjax

Generals/Code/GameEngine/Include/GameClient/LookAtXlat.h

@@ -71,6 +71,7 @@ class LookAtTranslator : public GameMessageTranslator
 	ICoord2D m_anchor;
 	ICoord2D m_originalAnchor;
 	ICoord2D m_currentPos;
+	Real m_anchorAngle;
 	Bool m_isScrolling;				// set to true if we are in the act of RMB scrolling
 	Bool m_isRotating;					// set to true if we are in the act of MMB rotating
 	Bool m_isPitching;					// set to true if we are in the act of ALT pitch rotation

Generals/Code/GameEngine/Source/GameClient/MessageStream/LookAtXlat.cpp

@@ -291,6 +291,7 @@ GameMessageDisposition LookAtTranslator::translateGameMessage(const GameMessage
 
 			m_isRotating = true;
 			m_anchor = msg->getArgument( 0 )->pixel;
+			m_anchorAngle = TheTacticalView->getAngle();
 			m_originalAnchor = msg->getArgument( 0 )->pixel;
 			m_currentPos = msg->getArgument( 0 )->pixel;
 			m_timestamp = TheGameClient->getFrame();
@@ -360,10 +361,18 @@ GameMessageDisposition LookAtTranslator::translateGameMessage(const GameMessage
 			if (m_isRotating)
 			{
 				const Real FACTOR = 0.01f;
+				const Real angle = FACTOR * (m_currentPos.x - m_originalAnchor.x);
+				Real targetAngle = m_anchorAngle + angle;
 
-				Real angle = FACTOR * (m_currentPos.x - m_anchor.x);
+				// TheSuperHackers @tweak Stubbjax 13/11/2025 Snap angle to nearest 45 degrees
+				// while using force attack mode for convenience.
+				if (TheInGameUI->isInForceAttackMode())
+				{
+					const Real snapRadians = DEG_TO_RADF(45);
+					targetAngle = WWMath::Round(targetAngle / snapRadians) * snapRadians;
+				}
 
-				TheTacticalView->setAngle( TheTacticalView->getAngle() + angle );
+				TheTacticalView->setAngle(targetAngle);
 				m_anchor = msg->getArgument( 0 )->pixel;
 			}
 

GeneralsMD/Code/GameEngine/Include/GameClient/LookAtXlat.h

@@ -71,6 +71,7 @@ class LookAtTranslator : public GameMessageTranslator
 	ICoord2D m_anchor;
 	ICoord2D m_originalAnchor;
 	ICoord2D m_currentPos;
+	Real m_anchorAngle;
 	Bool m_isScrolling;				// set to true if we are in the act of RMB scrolling
 	Bool m_isRotating;					// set to true if we are in the act of MMB rotating
 	Bool m_isPitching;					// set to true if we are in the act of ALT pitch rotation

GeneralsMD/Code/GameEngine/Source/GameClient/MessageStream/LookAtXlat.cpp

@@ -290,6 +290,7 @@ GameMessageDisposition LookAtTranslator::translateGameMessage(const GameMessage
 
 			m_isRotating = true;
 			m_anchor = msg->getArgument( 0 )->pixel;
+			m_anchorAngle = TheTacticalView->getAngle();
 			m_originalAnchor = msg->getArgument( 0 )->pixel;
 			m_currentPos = msg->getArgument( 0 )->pixel;
 			m_timestamp = TheGameClient->getFrame();
@@ -359,10 +360,18 @@ GameMessageDisposition LookAtTranslator::translateGameMessage(const GameMessage
 			if (m_isRotating)
 			{
 				const Real FACTOR = 0.01f;
+				const Real angle = FACTOR * (m_currentPos.x - m_originalAnchor.x);
+				Real targetAngle = m_anchorAngle + angle;
 
-				Real angle = FACTOR * (m_currentPos.x - m_anchor.x);
+				// TheSuperHackers @tweak Stubbjax 13/11/2025 Snap angle to nearest 45 degrees
+				// while using force attack mode for convenience.
+				if (TheInGameUI->isInForceAttackMode())
+				{
+					const Real snapRadians = DEG_TO_RADF(45);
+					targetAngle = WWMath::Round(targetAngle / snapRadians) * snapRadians;
+				}
 
-				TheTacticalView->setAngle( TheTacticalView->getAngle() + angle );
+				TheTacticalView->setAngle(targetAngle);
 				m_anchor = msg->getArgument( 0 )->pixel;
 			}