From 8948e8ac772edd011b34d877ca5aeb4a6950663f Mon Sep 17 00:00:00 2001
From: Brandon Danyluk <brandondanyluk366@gmail.com>
Date: Mon, 12 Apr 2021 17:03:21 -0600
Subject: [PATCH] add camera tool to observe projectile in flight

---
 addons/missileguidance/XEH_post_init.sqf      |  4 +++
 .../missileguidance/dev/projectileCamera.sqf  | 34 +++++++++++++++++++
 .../missileguidance/functions/fnc_onFired.sqf |  4 +++
 addons/missileguidance/script_component.hpp   |  1 +
 4 files changed, 43 insertions(+)
 create mode 100644 addons/missileguidance/dev/projectileCamera.sqf

diff --git a/addons/missileguidance/XEH_post_init.sqf b/addons/missileguidance/XEH_post_init.sqf
index cc09b1f0ac..38a4df2a05 100644
--- a/addons/missileguidance/XEH_post_init.sqf
+++ b/addons/missileguidance/XEH_post_init.sqf
@@ -11,3 +11,7 @@
     false
 },
 [15, [false, true, false]], false] call CBA_fnc_addKeybind;  //Ctrl+Tab Key
+
+#ifdef ENABLE_PROJECTILE_CAMERA
+GVAR(dev_fnc_projectileCamera) = compile preprocessFileLineNumbers QPATHTOF(dev\projectileCamera.sqf);
+#endif
diff --git a/addons/missileguidance/dev/projectileCamera.sqf b/addons/missileguidance/dev/projectileCamera.sqf
new file mode 100644
index 0000000000..8f70fa808a
--- /dev/null
+++ b/addons/missileguidance/dev/projectileCamera.sqf
@@ -0,0 +1,34 @@
+#include "\z\ace\addons\missileguidance\script_component.hpp"
+// tracks a projectile until it explodes
+params ["_projectile"];
+
+private _camera = "camera" camCreate getPosATL _projectile;
+_camera camPrepareFOV 0.7;
+_camera cameraEffect ["internal", "back"];
+
+_camera camCommitPrepared 0;
+
+[{
+	params ["_args", "_pfh"];
+	_args params ["_projectile", "_camera", "_projectilePos"];
+	if !(alive _projectile) exitWith {
+		[{
+			params ["_camera"];
+
+			_camera cameraEffect ["terminate", "back"];
+			_camera camCommitPrepared 0;
+			camDestroy _camera;
+		}, [_camera], 1.5] call CBA_fnc_waitAndExecute;
+
+		_camera camPrepareTarget _projectilePos;
+		_camera camCommitPrepared 0;
+
+		[_pfh] call CBA_fnc_removePerFrameHandler;
+	};
+
+	_camera camPrepareTarget _projectile;
+	_camera camPrepareRelPos [0, -5, 1];
+	_camera camCommitPrepared 0;
+
+	_args set [2, getPosATL _projectile];
+}, 0, [_projectile, _camera, getPosATL _projectile]] call CBA_fnc_addPerFrameHandler;
\ No newline at end of file
diff --git a/addons/missileguidance/functions/fnc_onFired.sqf b/addons/missileguidance/functions/fnc_onFired.sqf
index d2d1095151..f41a089cff 100644
--- a/addons/missileguidance/functions/fnc_onFired.sqf
+++ b/addons/missileguidance/functions/fnc_onFired.sqf
@@ -175,6 +175,10 @@ if (_onFiredFunc != "") then {
 
 [LINKFUNC(guidancePFH),0, _args ] call CBA_fnc_addPerFrameHandler;
 
+#ifdef ENABLE_PROJECTILE_CAMERA
+[_projectile] call GVAR(dev_fnc_projectileCamera);
+#endif
+
 
 /* Clears locking settings
 (vehicle _shooter) setVariable [QGVAR(target), nil];
diff --git a/addons/missileguidance/script_component.hpp b/addons/missileguidance/script_component.hpp
index 92aacf9011..a54c93086b 100644
--- a/addons/missileguidance/script_component.hpp
+++ b/addons/missileguidance/script_component.hpp
@@ -3,6 +3,7 @@
 #include "\z\ace\addons\main\script_mod.hpp"
 
  #define DRAW_GUIDANCE_INFO
+ #define ENABLE_PROJECTILE_CAMERA
  #define DEBUG_MODE_FULL
  #define DISABLE_COMPILE_CACHE
 // #define ENABLE_PERFORMANCE_COUNTERS