5 files changed, 43 insertions, 3 deletions

diff --git a/src/core/Collision.cpp b/src/core/Collision.cpp
index b68214af..77e28a10 100644
--- a/src/core/Collision.cpp
+++ b/src/core/Collision.cpp
@@ -1801,6 +1801,21 @@ CColSphere::Set(float radius, const CVector &center, uint8 surf, uint8 piece)
 	this->piece = piece;
 }
 
+bool
+CColSphere::IntersectRay(CVector const& from, CVector const& dir, CVector &entry, CVector &exit)
+{
+	CVector distToCenter = from - center;
+	float distToTouchSqr = distToCenter.MagnitudeSqr() - sq(radius);
+	float root1, root2;
+
+	if (!CGeneral::SolveQuadratic(1.0f, DotProduct(distToCenter, dir) * 2.f, distToTouchSqr, root1, root2))
+		return false;
+
+	entry = from + dir * root1;
+	exit = from + dir * root2;
+	return true;
+}
+
 void
 CColBox::Set(const CVector &min, const CVector &max, uint8 surf, uint8 piece)
 {
diff --git a/src/core/Collision.h b/src/core/Collision.h
index 12af5225..9f08ccd6 100644
--- a/src/core/Collision.h
+++ b/src/core/Collision.h
@@ -31,6 +31,7 @@ struct CColSphere : public CSphere
 	uint8 piece;
 
 	void Set(float radius, const CVector &center, uint8 surf, uint8 piece);
+	bool IntersectRay(CVector const &from, CVector const &dir, CVector &entry, CVector &exit);
 	using CSphere::Set;
 };
 
diff --git a/src/core/General.h b/src/core/General.h
index 3188d82b..dbf169e9 100644
--- a/src/core/General.h
+++ b/src/core/General.h
@@ -134,6 +134,18 @@ public:
 		return *str2 != '\0';
 	}
 
+	static bool SolveQuadratic(float a, float b, float c, float &root1, float &root2)
+	{
+		float discriminant = b * b - 4.f * a * c;
+		if (discriminant < 0.f)
+			return false;
+
+		float discriminantSqrt = Sqrt(discriminant);
+		root2 = (-b + discriminantSqrt) / (2.f * a);
+		root1 = (-b - discriminantSqrt) / (2.f * a);
+		return true;
+	}
+
 	// not too sure about all these...
 	static uint16 GetRandomNumber(void)
 		{ return myrand() & MYRAND_MAX; }
diff --git a/src/core/config.h b/src/core/config.h
index e23b0a90..ad5c0064 100644
--- a/src/core/config.h
+++ b/src/core/config.h
@@ -202,12 +202,11 @@ enum Config {
 #define COMPATIBLE_SAVES // this allows changing structs while keeping saves compatible
 #define FIX_HIGH_FPS_BUGS_ON_FRONTEND
 
-// Rendering/display
-#define ASPECT_RATIO_SCALE	// Not just makes everything scale with aspect ratio, also adds support for all aspect ratios
 // Just debug menu entries
 #ifdef DEBUGMENU
 #define TOGGLEABLE_BETA_FEATURES // not too many things
 #define RELOADABLES			// some debug menu options to reload TXD files
+#define MISSION_SWITCHER // from debug menu
 #endif
 
 // Rendering/display
diff --git a/src/core/re3.cpp b/src/core/re3.cpp
index 13db1f6a..76865339 100644
--- a/src/core/re3.cpp
+++ b/src/core/re3.cpp
@@ -31,6 +31,7 @@
 #include "Text.h"
 #include "WaterLevel.h"
 #include "main.h"
+#include "Script.h"
 
 #ifndef _WIN32
 #include "assert.h"
@@ -309,6 +310,15 @@ ResetCamStatics(void)
 	TheCamera.Cams[TheCamera.ActiveCam].ResetStatics = true;
 }
 
+#ifdef MISSION_SWITCHER
+int8 nextMissionToSwitch = 0;
+static void
+SwitchToMission(void)
+{
+	switchMissionTo = nextMissionToSwitch;
+}
+#endif
+
 static const char *carnames[] = {
 	"landstal", "idaho", "stinger", "linerun", "peren", "sentinel", "rio", "firetruk", "trash", "stretch", "manana",
 	"infernus", "voodoo", "pony", "mule", "cheetah", "ambulan", "fbicar", "moonbeam", "esperant", "taxi", "washing",
@@ -512,7 +522,10 @@ DebugMenuPopulate(void)
 #ifdef TIMEBARS
 		DebugMenuAddVarBool8("Debug", "Show Timebars", &gbShowTimebars, nil);
 #endif
-
+#ifdef MISSION_SWITCHER
+		DebugMenuAddInt8("Debug", "Select mission no", &nextMissionToSwitch, nil, 1, 0, 96, nil);
+		DebugMenuAddCmd("Debug", "Start selected mission ", SwitchToMission);
+#endif
 		extern bool PrintDebugCode;
 		extern int16 DebugCamMode;
 		DebugMenuAddVarBool8("Cam", "Use mouse Cam", &CCamera::m_bUseMouse3rdPerson, nil);