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>
21 void CheckJoystickData()
28 if (joystick[i].xmiddle <= distance)
29 joystick[i].xmiddle = distance;
30 if (joystick[i].ymiddle <= distance)
31 joystick[i].ymiddle = distance;
33 if (joystick[i].xleft >= joystick[i].xmiddle)
34 joystick[i].xleft = joystick[i].xmiddle-distance;
35 if (joystick[i].xright <= joystick[i].xmiddle)
36 joystick[i].xright = joystick[i].xmiddle+distance;
38 if (joystick[i].yupper >= joystick[i].ymiddle)
39 joystick[i].yupper = joystick[i].ymiddle-distance;
40 if (joystick[i].ylower <= joystick[i].ymiddle)
41 joystick[i].ylower = joystick[i].ymiddle+distance;
45 int JoystickPosition(int middle, int margin, int actual)
50 if (margin<middle && actual>middle)
52 if (margin>middle && actual<middle)
55 range = ABS(margin-middle);
56 pos = ABS(actual-middle);
57 percentage = (int)(pos*100/range);
67 struct joystick joy_ctrl;
69 struct joystick_control
77 int js_x,js_y, js_b1,js_b2;
78 int left, right, up, down;
81 if (joystick_status==JOYSTICK_OFF)
85 if (read(joystick_device, &joy_ctrl, sizeof(joy_ctrl)) != sizeof(joy_ctrl))
87 Error(ERR_RETURN, "cannot read joystick settings - no joystick support");
88 joystick_status = JOYSTICK_OFF;
98 js_b1 = joy_ctrl.buttons & 1;
99 js_b2 = joy_ctrl.buttons & 2;
102 left = JoystickPosition(joystick[joystick_nr].xmiddle,
103 joystick[joystick_nr].xleft, js_x);
104 right = JoystickPosition(joystick[joystick_nr].xmiddle,
105 joystick[joystick_nr].xright, js_x);
106 up = JoystickPosition(joystick[joystick_nr].ymiddle,
107 joystick[joystick_nr].yupper, js_y);
108 down = JoystickPosition(joystick[joystick_nr].ymiddle,
109 joystick[joystick_nr].ylower, js_y);
111 if (left>JOYSTICK_PERCENT)
113 else if (right>JOYSTICK_PERCENT)
115 if (up>JOYSTICK_PERCENT)
117 else if (down>JOYSTICK_PERCENT)
120 result |= JOY_BUTTON_1;
122 result |= JOY_BUTTON_2;
132 static int last_joy_button = 0;
133 int joy_button = (Joystick() & JOY_BUTTON);
139 result = JOY_BUTTON_PRESSED;
141 result = JOY_BUTTON_NEW_PRESSED;
146 result = JOY_BUTTON_NEW_RELEASED;
148 result = JOY_BUTTON_NOT_PRESSED;
151 last_joy_button = joy_button;