1 /*-
2  * Copyright (c) 2015 Dag-Erling Smørgrav
51 	-1
66 	int x, y;		/* coordinates */  member
83 	unsigned int x, y;	/* coordinates */  in plasma_update()  local
87 	unsigned int org, off;	/* origin and offset */  in plasma_update()
93 	for (y = org = off = 0; y < scrh; ++y) {  in plasma_update()
98 				dx = x - plasma_foci[i].x;  in plasma_update()
99 				dy = y - plasma_foci[i].y;  in plasma_update()
106 			 * m is now in the range +/- FOCI, but we need a  in plasma_update()
107 			 * value between 0 and 255.  We scale to +/- 127  in plasma_update()
116 				off -= banksize;  in plasma_update()
129 			plasma_foci[i].vx = -plasma_foci[i].vx;  in plasma_update()
130 			plasma_foci[i].x = -plasma_foci[i].x;  in plasma_update()
133 			plasma_foci[i].vx = -plasma_foci[i].vx;  in plasma_update()
134 			plasma_foci[i].x = scrw - (plasma_foci[i].x - scrw);  in plasma_update()
136 		plasma_foci[i].y += plasma_foci[i].vy;  in plasma_update()
137 		if (plasma_foci[i].y < 0) {  in plasma_update()
139 			plasma_foci[i].vy = -plasma_foci[i].vy;  in plasma_update()
140 			plasma_foci[i].y = -plasma_foci[i].y;  in plasma_update()
141 		} else if (plasma_foci[i].y >= scrh) {  in plasma_update()
143 			plasma_foci[i].vy = -plasma_foci[i].vy;  in plasma_update()
144 			plasma_foci[i].y = scrh - (plasma_foci[i].y - scrh);  in plasma_update()
165 			vid = (unsigned char *)adp->va_window;  in plasma_saver()
166 			banksize = adp->va_window_size;  in plasma_saver()
206 		plasma_foci[i].y = random() % scrh;  in plasma_init()
207 		plasma_foci[i].vx = random() % 5 - 2;  in plasma_init()
208 		plasma_foci[i].vy = random() % 5 - 2;  in plasma_init()