From 4f47cd0bc674abeafd9d46e5ab046e4b2e3b0b00 Mon Sep 17 00:00:00 2001
From: Steve <stephenjsweeney@battleforthesolarsystem.com>
Date: Sat, 31 Oct 2015 10:00:46 +0000
Subject: [PATCH] Allow player to switch fighters upon death, during an epic
 battle.

---
 src/battle/battle.c  |  9 +++++-
 src/battle/battle.h  |  1 +
 src/battle/player.c  | 76 +++++++++++++++++++++++++++++++++++++++++---
 src/battle/player.h  |  3 ++
 src/galaxy/mission.c |  5 +++
 src/structs.h        |  1 +
 6 files changed, 90 insertions(+), 5 deletions(-)

diff --git a/src/battle/battle.c b/src/battle/battle.c
index 3811194..2ac8471 100644
--- a/src/battle/battle.c
+++ b/src/battle/battle.c
@@ -86,7 +86,14 @@ static void logic(void)
 		
 		if (show == SHOW_BATTLE)
 		{
-			doBattle();
+			if (!battle.epic || (battle.epic && player != NULL))
+			{
+				doBattle();
+			}
+			else if (battle.epic && player == NULL)
+			{
+				doPlayerSelect();
+			}
 		}
 	}
 	
diff --git a/src/battle/battle.h b/src/battle/battle.h
index 07e89f0..3961920 100644
--- a/src/battle/battle.h
+++ b/src/battle/battle.h
@@ -62,6 +62,7 @@ extern void drawOptions(void);
 extern void playSound(int id);
 extern void checkTrigger(char *name, int type);
 extern void resetWaypoints(void);
+extern void doPlayerSelect(void);
 
 extern App app;
 extern Battle battle;
diff --git a/src/battle/player.c b/src/battle/player.c
index a0e170b..fcebfa8 100644
--- a/src/battle/player.c
+++ b/src/battle/player.c
@@ -23,8 +23,12 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 static void selectTarget(void);
 static void switchGuns(void);
 static void selectMissionTarget(void);
+static void selectNewPlayer(int dir);
+static void initPlayerSelect(void);
 
+static int selectedPlayerIndex;
 static int availableGuns[BT_MAX];
+static Entity *availablePlayerUnits[MAX_SELECTABLE_PLAYERS];
 
 void initPlayer(void)
 {
@@ -126,12 +130,76 @@ void doPlayer(void)
 		
 		if (player->health <= 0 && battle.status == MS_IN_PROGRESS)
 		{
-			failIncompleteObjectives();
-			
-			battle.status = MS_FAILED;
-			battle.missionFinishedTimer = FPS;
+			if (!battle.epic || (battle.epic && battle.numAllies <= 1))
+			{
+				failIncompleteObjectives();
+				
+				battle.status = MS_FAILED;
+				battle.missionFinishedTimer = FPS;
+			}
 		}
 	}
+	else
+	{
+		initPlayerSelect();
+	}
+}
+
+void initPlayerSelect(void)
+{
+	Entity *e;
+	
+	memset(&availablePlayerUnits, 0, sizeof(Entity*) * MAX_SELECTABLE_PLAYERS);
+	
+	selectedPlayerIndex = 0;
+	
+	for (e = battle.entityHead.next ; e != NULL ; e = e->next)
+	{
+		if (e->type == ET_FIGHTER && e->health > 0 && e->side == SIDE_ALLIES && selectedPlayerIndex < MAX_SELECTABLE_PLAYERS)
+		{
+			availablePlayerUnits[selectedPlayerIndex++] = e;
+		}
+	}
+	
+	selectedPlayerIndex = 0;
+	
+	memset(&app.keyboard, 0, sizeof(int) * MAX_KEYBOARD_KEYS);
+}
+
+void doPlayerSelect(void)
+{
+	if (app.keyboard[SDL_SCANCODE_LEFT])
+	{
+		selectNewPlayer(-1);
+		
+		app.keyboard[SDL_SCANCODE_LEFT] = 0;
+	}
+	
+	if (app.keyboard[SDL_SCANCODE_RIGHT])
+	{
+		selectNewPlayer(1);
+		
+		app.keyboard[SDL_SCANCODE_RIGHT] = 0;
+	}
+	
+	if (app.keyboard[SDL_SCANCODE_RETURN])
+	{
+		player = availablePlayerUnits[selectedPlayerIndex];
+		
+		player->action = NULL;
+		player->defaultAction = NULL;
+	}
+}
+
+static void selectNewPlayer(int dir)
+{
+	do
+	{
+		selectedPlayerIndex += dir;
+		
+		selectedPlayerIndex = mod(selectedPlayerIndex, MAX_SELECTABLE_PLAYERS);
+	}
+	while (availablePlayerUnits[selectedPlayerIndex] == NULL);
 }
 
 static void switchGuns(void)
diff --git a/src/battle/player.h b/src/battle/player.h
index 9b52d9c..bf00211 100644
--- a/src/battle/player.h
+++ b/src/battle/player.h
@@ -23,6 +23,8 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 #include "../defs.h"
 #include "../structs.h"
 
+#define MAX_SELECTABLE_PLAYERS	8
+
 extern void fireGuns(Entity *owner);
 extern void fireMissile(Entity *owner);
 extern void applyFighterThrust(void);
@@ -30,6 +32,7 @@ extern void applyFighterBrakes(void);
 extern int getDistance(int x1, int y1, int x2, int y2);
 extern void failIncompleteObjectives(void);
 extern void addHudMessage(SDL_Color c, char *format, ...);
+extern int mod(int n, int x);
 
 extern App app;
 extern Battle battle;
diff --git a/src/galaxy/mission.c b/src/galaxy/mission.c
index a40899a..de1ec8a 100644
--- a/src/galaxy/mission.c
+++ b/src/galaxy/mission.c
@@ -50,6 +50,11 @@ void loadMission(char *filename)
 	battle.planet.x = rand() % SCREEN_WIDTH - rand() % SCREEN_WIDTH;
 	battle.planet.y = rand() % SCREEN_HEIGHT - rand() % SCREEN_HEIGHT;
 	
+	if (cJSON_GetObjectItem(root, "epic"))
+	{
+		battle.epic = cJSON_GetObjectItem(root, "epic")->valueint;
+	}
+	
 	loadObjectives(cJSON_GetObjectItem(root, "objectives"));
 	
 	loadTriggers(cJSON_GetObjectItem(root, "triggers"));
diff --git a/src/structs.h b/src/structs.h
index 8f2fd94..5439e31 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -223,6 +223,7 @@ typedef struct {
 	int numAllies;
 	int numEnemies;
 	int status;
+	int epic;
 	int missionFinishedTimer;
 	int numObjectivesComplete, numObjectivesTotal;
 	Entity *missionTarget;