1 /***********************************************************
2 * Rocks'n'Diamonds -- McDuffin Strikes Back! *
3 *----------------------------------------------------------*
4 * (c) 1995-98 Artsoft Entertainment *
8 * phone: ++49 +521 290471 *
9 * email: aeglos@valinor.owl.de *
10 *----------------------------------------------------------*
12 ***********************************************************/
15 #include <machine/joystick.h>
31 void CheckJoystickData()
38 if (joystick[i].xmiddle <= distance)
39 joystick[i].xmiddle = distance;
40 if (joystick[i].ymiddle <= distance)
41 joystick[i].ymiddle = distance;
43 if (joystick[i].xleft >= joystick[i].xmiddle)
44 joystick[i].xleft = joystick[i].xmiddle-distance;
45 if (joystick[i].xright <= joystick[i].xmiddle)
46 joystick[i].xright = joystick[i].xmiddle+distance;
48 if (joystick[i].yupper >= joystick[i].ymiddle)
49 joystick[i].yupper = joystick[i].ymiddle-distance;
50 if (joystick[i].ylower <= joystick[i].ymiddle)
51 joystick[i].ylower = joystick[i].ymiddle+distance;
55 int JoystickPosition(int middle, int margin, int actual)
60 if (margin<middle && actual>middle)
62 if (margin>middle && actual<middle)
65 range = ABS(margin-middle);
66 pos = ABS(actual-middle);
67 percentage = (int)(pos*100/range);
77 struct joystick joy_ctrl;
79 struct joystick_control
87 int js_x,js_y, js_b1,js_b2;
88 int left, right, up, down;
91 if (joystick_status==JOYSTICK_OFF)
95 if (read(joystick_device, &joy_ctrl, sizeof(joy_ctrl)) != sizeof(joy_ctrl))
97 Error(ERR_RETURN, "cannot read joystick settings - no joystick support");
98 joystick_status = JOYSTICK_OFF;
108 js_b1 = joy_ctrl.buttons & 1;
109 js_b2 = joy_ctrl.buttons & 2;
112 left = JoystickPosition(joystick[joystick_nr].xmiddle,
113 joystick[joystick_nr].xleft, js_x);
114 right = JoystickPosition(joystick[joystick_nr].xmiddle,
115 joystick[joystick_nr].xright, js_x);
116 up = JoystickPosition(joystick[joystick_nr].ymiddle,
117 joystick[joystick_nr].yupper, js_y);
118 down = JoystickPosition(joystick[joystick_nr].ymiddle,
119 joystick[joystick_nr].ylower, js_y);
121 if (left>JOYSTICK_PERCENT)
123 else if (right>JOYSTICK_PERCENT)
125 if (up>JOYSTICK_PERCENT)
127 else if (down>JOYSTICK_PERCENT)
130 result |= JOY_BUTTON_1;
132 result |= JOY_BUTTON_2;
142 static int last_joy_button = 0;
143 int joy_button = (Joystick() & JOY_BUTTON);
149 result = JOY_BUTTON_PRESSED;
151 result = JOY_BUTTON_NEW_PRESSED;
156 result = JOY_BUTTON_NEW_RELEASED;
158 result = JOY_BUTTON_NOT_PRESSED;
161 last_joy_button = joy_button;