Adds controller haptics

src/gamecontroller.c

@@ -2,14 +2,16 @@
 #include "util.h"
 
 static SDL_GameController *controller = NULL;
+static SDL_Haptic *haptic = NULL;
 static Uint8 controllerMode = 0;
 
 void
 gamecontroller_set(SDL_GameController *ctrler)
 {
+	controller = ctrler;
+
 	const char *ctrlName = SDL_GameControllerName(controller);
 	info("Game controller connected: %s", ctrlName);
-	controller = ctrler;
 
 	// Try to determine if this is a PS3/4 controller
 	if (ctrlName[0] == 'P' &&
@@ -18,6 +20,30 @@ gamecontroller_set(SDL_GameController *ctrler)
 		controllerMode = 2;
 	else
 		controllerMode = 1;
+
+	haptic = SDL_HapticOpenFromJoystick(SDL_GameControllerGetJoystick(controller));
+	if (haptic) {
+		info("Haptics are supported by controller: %s", ctrlName);
+		if (SDL_HapticRumbleInit(haptic) >= 0) {
+			info("Haptics enabled for controller: %s", ctrlName);
+		}
+		else {
+			info("Failed to enable haptics for: %s", ctrlName);
+		}
+	}
+	else {
+		info("Haptics not supported by controller: %s", ctrlName);
+	}
+}
+
+void
+gamecontroller_rumble(float intensity, Uint32 duration)
+{
+	if (!haptic)
+		return;
+
+	if (SDL_HapticRumblePlay(haptic, intensity, duration) != 0)
+		error("Failed to play rumble: %s", SDL_GetError());
 }
 
 Uint8
@@ -31,4 +57,6 @@ gamecontroller_close()
 {
 	if (controller)
 		SDL_GameControllerClose(controller);
+	if (haptic)
+		SDL_HapticClose(haptic);
 }

src/gamecontroller.h

@@ -10,6 +10,9 @@ typedef struct GameController {
 void
 gamecontroller_set(SDL_GameController *controller);
 
+void
+gamecontroller_rumble(float intensity, Uint32 duration);
+
 Uint8
 gamecontroller_mode(void);
 

src/main.c

@@ -185,7 +185,7 @@ bool initSDL(void)
 {
 	int imgFlags = IMG_INIT_PNG;
 
-	if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_GAMECONTROLLER) < 0)
+	if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_GAMECONTROLLER | SDL_INIT_HAPTIC) < 0)
 	{
 		error("Could not initiate SDL2: %s", SDL_GetError());
 		return false;

src/player.c

@@ -35,6 +35,7 @@
 #include "actiontextbuilder.h"
 #include "animation.h"
 #include "trap.h"
+#include "gamecontroller.h"
 
 #ifdef STEAM_BUILD
 #include "steam/steamworks_api_wrapper.h"
@@ -219,6 +220,7 @@ has_collided(Player *player, RoomMatrix *matrix, Vector2d direction)
 		player->sprite->pos.x -= TILE_DIMENSION * (int)direction.x;
 		player->sprite->pos.y -= TILE_DIMENSION * (int)direction.y;
 
+		gamecontroller_rumble(0.30, 100);
 		if (space->monster) {
 			on_monster_collision(player, space->monster, matrix, direction);
 		} else {
@@ -590,6 +592,8 @@ player_hit(Player *p, unsigned int dmg)
 		actiontextbuilder_create_text(msg,
 					      C_RED,
 					      &p->sprite->pos);
+
+		gamecontroller_rumble(0.50, 100);
 	} else {
 		actiontextbuilder_create_text("Dodged",
 					      C_YELLOW,