David Jeffery's linux joystick support ala nuq

configure.in

@@ -64,7 +64,7 @@ AC_CHECK_HEADERS(
 	dsound.h mmsystem.h initguid.h mme/mmsystem.h mme/mme_public.h \
 	sys/asoundlib.h string.h strings.h memory.h malloc.h \
 	errno.h sys/dir.h fnmatch.h \
-	mgraph.h
+	mgraph.h linux/joystick.h
 )
 
 

include/joystick.h

@@ -0,0 +1,25 @@
+
+/* 
+ * Copyright (C) 2000 David Jeffery
+ */
+
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or 
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * 
+ */
+
+void joystick_init(void);
+void joystick_command(void);
+void joystick_move(usercmd_t *cmd);

source/Makefile.am

@@ -136,7 +136,7 @@ client_SOURCES= cl_cmd.c cl_cvar.c cl_demo.c cl_ents.c cl_input.c cl_main.c \
 		cl_misc.c cl_parse.c cl_pred.c cl_tent.c cl_cam.c teamplay.c \
 		r_view.c wad.c model_alias.c model_sprite.c \
 		console.c keys.c menu.c nonintel.c skin.c sbar.c \
-                cl_slist.c $(client_ASM)
+		cl_slist.c $(client_ASM) joystick.c
 
 #
 # Software-rendering clients

source/in_svgalib.c

@@ -38,6 +38,7 @@
 #include "cvar.h"
 #include "cmd.h"
 #include "qargs.h"
+#include "joystick.h"
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -112,6 +113,8 @@ int IN_Init(void)
 	if (UseMouse)
 		IN_init_mouse();
 
+	joystick_init();
+
 	in_svgalib_inited = 1;
 	return 1;
 }

source/in_x11.c

@@ -60,6 +60,7 @@
 #include "client.h"
 #include "context_x11.h"
 #include "qargs.h"
+#include "joystick.h"
 
 #ifdef HAVE_STRINGS_H
 #include <strings.h>
@@ -424,6 +425,8 @@ IN_Init(void)
 		XChangeWindowAttributes(x_disp, x_win, attribmask, &attribs_2);
 	}
 
+	joystick_init();
+
 	_windowed_mouse = Cvar_Get ("_windowed_mouse","0",CVAR_ARCHIVE,"None");
 	m_filter = Cvar_Get ("m_filter","0",CVAR_ARCHIVE,"None");
 

source/joystick.c

@@ -0,0 +1,164 @@
+
+/* 
+ * Copyright (C) 2000 David Jeffery
+ */
+
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or 
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * 
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#ifdef HAVE_LINUX_JOYSTICK_H
+
+#include <linux/joystick.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include "console.h"
+#include "client.h"
+#include "cvar.h"
+#include "keys.h"
+
+//joystick variables and structures
+#define MAX_JOYAXIS 6
+#define MAX_JOYBUTTON 10
+#define JOYLOOK_MAX 200
+#define JOYMOVE_MAX 200
+int joydev;
+
+typedef struct {
+	char *name;
+	char *string;
+} ocvar_t;
+
+struct joyaxis{
+	int current;
+	ocvar_t var;
+	cvar_t *axis;
+};
+
+struct joybutton{
+	int old;
+	int current;
+};
+
+struct joyaxis joyaxiscontrol[MAX_JOYAXIS] = {
+	{0,{"joyaxis1","1"}} ,
+	{0,{"joyaxis2","2"}} ,
+	{0,{"joyaxis3","3"}} ,
+	{0,{"joyaxis4","0"}} ,
+	{0,{"joyaxis5","0"}} ,
+	{0,{"joyaxis6","0"}}
+};
+
+struct joybutton joybuttoncontrol[MAX_JOYBUTTON];
+int joyfound = 0;
+
+void joystick_command(void)
+{
+	struct js_event event;
+
+	if(!joyfound)
+		return;
+	while(read(joydev, &event, sizeof(struct js_event)) > -1){
+		if(event.type & JS_EVENT_BUTTON){
+			if(event.number >= MAX_JOYBUTTON)
+				continue;
+			joybuttoncontrol[event.number].current = event.value;
+			if(joybuttoncontrol[event.number].current >
+					joybuttoncontrol[event.number].old)
+				Key_Event(K_AUX1 + event.number, true);
+			else if(joybuttoncontrol[event.number].current <
+					joybuttoncontrol[event.number].old)
+				Key_Event(K_AUX1 + event.number, false);
+			joybuttoncontrol[event.number].old =
+				joybuttoncontrol[event.number].current;
+		}
+		else if(event.type & JS_EVENT_AXIS){
+			if(event.number >= MAX_JOYAXIS)
+				continue;
+			joyaxiscontrol[event.number].current = event.value;
+		}
+	}
+}
+
+void joystick_move(usercmd_t *cmd)
+{
+	int i;
+	if(!joyfound)
+		return;
+
+	for(i = 0; i < MAX_JOYAXIS; i++) {
+		switch(joyaxiscontrol[i].axis->int_val){
+		case 1:
+			cl.viewangles[YAW] -= m_yaw->value * (float)joyaxiscontrol[i].current/JOYLOOK_MAX;	
+			break;
+		case 2:
+			cmd->forwardmove -= m_forward->value * (float)joyaxiscontrol[i].current/JOYMOVE_MAX;
+			break;
+		case 3:
+			cmd->sidemove += m_side->value * (float)joyaxiscontrol[i].current/JOYMOVE_MAX;
+			break;
+		case 4:
+			if(joyaxiscontrol[i].current){
+				V_StopPitchDrift();
+				cl.viewangles[PITCH] -= m_pitch->value * (float)joyaxiscontrol[i].current/JOYLOOK_MAX;
+				if(cl.viewangles[PITCH] > 80)
+					cl.viewangles[PITCH] = 80;
+				else if(cl.viewangles[PITCH] < -70)
+					cl.viewangles[PITCH] = -70;
+			}
+			break;
+		}
+	}
+}
+
+void joystick_init(void)
+{
+	/*initialize joystick if found */
+	if ((joydev = open("/dev/js0", O_RDONLY | O_NONBLOCK)) < 0) {
+		joyfound = 0;
+		Con_DPrintf("no joystick\n");
+	} else {
+		int i;
+		joyfound = 1;
+		for(i = 0; i < MAX_JOYAXIS; i++) {
+			joyaxiscontrol[i].axis = Cvar_Get(joyaxiscontrol[i].var.name,
+											  joyaxiscontrol[i].var.string,
+											  CVAR_ARCHIVE, "None");
+		}
+		for(i = 0; i < MAX_JOYBUTTON; i++) {
+				joybuttoncontrol[i].old = 0;
+				joybuttoncontrol[i].current = 0;
+		}
+		Con_DPrintf("joystick enabled\n");
+	}
+}
+
+#else
+void joystick_init(void){
+}
+
+void joystick_command(void){
+}
+
+void joystick_move(usercmd_t *cmd){
+}
+#endif
+