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/*
* Project: S.Ha.R.K.
*
* Coordinators: Giorgio Buttazzo <giorgio@sssup.it>
*
* ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy)
*
* http://www.sssup.it
* http://retis.sssup.it
* http://hartik.sssup.it
*/
#include "asteroid.h"
PID pid_RC
;
int nrock
;
int kill_rock
;
rock_pos rocks
[ROCK_NMAX
];
void draw_rock
(int x
, int y
, int r
, int c
)
{
sem_wait
(&mx_grf
);
grx_disc
(x
, y
, r
, c
);
sem_post
(&mx_grf
);
}
TASK rock
(rock_ini
* ri
)
{
int x
, y
, r
; /* rock graphic position */
int ox
, oy
; /* rock old position */
int x0
, y0
; /* rock initial position */
float vx
, vy
; /* rock speed */
float vxo
, vyo
; /* rock initial speed */
float ty
, tx
;
float dt
;
float rand_ang
;
int rand_side
;
int ab
, ax
, ay
, i
, l
;
x
= y
= x0
= y0
= ox
= oy
= vx
= vy
= ab
= 0;
i
= ri
->i
;
r
= ri
->r
;
rand_ang
= ((rand()%120) - 60) * PI
/ 180.
;
sem_wait
(&mx_st_scr
);
l
= score
/ 50;
sem_post
(&mx_st_scr
);
sem_wait
(&mx_mat
);
vxo
= - (ROCK_VEL
+ l
) * sin(rand_ang
);
vyo
= - (ROCK_VEL
+ l
) * cos(rand_ang
);
sem_post
(&mx_mat
);
#ifdef ASTRO_MOVE
rand_side
= rand()%4;
#else
rand_side
= 1;
#endif
if (rand_side
== 0) { // Bottom
vx
= vxo
;
vy
= vyo
;
}
if (rand_side
== 1) { // Top
vx
= -vxo
;
vy
= -vyo
;
}
if (rand_side
== 2) { // Right
vx
= vyo
;
vy
= -vxo
;
}
if (rand_side
== 3) { // Left
vx
= -vyo
;
vy
= vxo
;
}
if ( (ri
->x
== 0) && (ri
->y
== 0) ) {
if (rand_side
< 2) { // Bottom or Top
x
= ox
= x0
= GB_XMIN
+ (GB_XMAX
-GB_XMIN
)/4 + (rand()%((GB_XMAX
-GB_XMIN
)/2));
if (rand_side
== 0) { // Bottom
y
= oy
= y0
= GB_YMAX
- (r
+1);
}
if (rand_side
== 1) { // Top
y
= oy
= y0
= GB_YMIN
+ (r
+1);
}
} else {
y
= oy
= y0
= GB_YMIN
+ (GB_YMAX
-GB_YMIN
)/4 + (rand()%((GB_YMAX
-GB_YMIN
)/2));
if (rand_side
== 2) { // Right
x
= ox
= x0
= GB_XMAX
- (r
+1);
}
if (rand_side
== 3) { // Left
x
= ox
= x0
= GB_XMIN
+ (r
+1);
}
}
} else {
x
= ox
= x0
= ri
->x
;
y
= oy
= y0
= ri
->y
;
}
sem_wait
(&mx_rk
);
rocks
[i
].
x = x
;
rocks
[i
].
y = y
;
rocks
[i
].
r = r
;
sem_post
(&mx_rk
);
tx
= 0;
ty
= 0;
dt
= ((float)ROCK_PERIOD
)/100000;
while (1) {
y
= y0
+ vy
* ty
;
x
= x0
+ vx
* tx
;
sem_wait
(&mx_rk
);
rocks
[i
].
x = x
;
rocks
[i
].
y = y
;
r
= rocks
[i
].
r;
sem_post
(&mx_rk
);
draw_rock
(ox
, oy
, r
, RGB_BLACK
);
if ((kill_rock
) || (crash
)){
nrock
--;
sem_wait
(&mx_rk
);
rocks
[i
].
pid = NIL
;
sem_post
(&mx_rk
);
return 0;
}
ox
= x
;
oy
= y
;
sem_wait
(&mx_xy
);
ax
= astro_x
;
ay
= astro_y
;
sem_post
(&mx_xy
);
if (dist_xy
(x
, y
, ax
, ay
) < (ASTRO_RADIUS
/2+r
)) {
if (!ab
) {
sem_wait
(&mx_st_nrg
);
energy
-= ENERGY_GOT
;
sem_post
(&mx_st_nrg
);
ab
= 1;
}
} else
ab
= 0;
sem_wait
(&mx_xy
);
if (dist_xy
(x
, y
, astro_x
, astro_y
) < (ASTRO_RADIUS
+r
)/2) crash
= 1;
sem_post
(&mx_xy
);
#ifdef ASTRO_MOVE
if (x
<= GB_XMIN
+ r
) {
x0
= x
= GB_XMAX
- (r
+1);
y0
= y
;
tx
= ty
= 0;
}
if (x
>= GB_XMAX
- r
) {
x0
= x
= GB_XMIN
+ (r
+1);
y0
= y
;
tx
= ty
= 0;
}
if (y
<= GB_YMIN
+ r
) {
x0
= x
;
y0
= y
= GB_YMAX
- (r
+1);
tx
= ty
= 0;
}
if (y
>= GB_YMAX
- r
) {
x0
= x
;
y0
= y
= GB_YMIN
+ (r
+1);
tx
= ty
= 0;
}
#else
if ( (x
<= GB_XMIN
+ r
) || (x
>= GB_XMAX
- r
) || (y
>= GB_YMAX
- 2*r
) ) {
if (y
>= GB_YMAX
- 2*r
) {
sem_wait
(&mx_st_nrg
);
energy
-= ENERGY_GOT
;
sem_post
(&mx_st_nrg
);
}
nrock
--;
sem_wait
(&mx_rk
);
rocks
[i
].
pid = NIL
;
sem_post
(&mx_rk
);
return 0;
}
#endif
draw_rock
(ox
, oy
, r
, RGB_YELLOW
);
ty
+= dt
;
tx
+= dt
;
task_endcycle
();
}
}
void rock_create
(rock_ini
* ri
)
{
SOFT_TASK_MODEL mp
;
PID pid
;
int i
;
soft_task_default_model
(mp
);
soft_task_def_ctrl_jet
(mp
);
soft_task_def_group
(mp
, ROCK_GROUP
);
soft_task_def_met
(mp
, ROCK_WCET
);
soft_task_def_period
(mp
,ROCK_PERIOD
);
soft_task_def_usemath
(mp
);
i
= -1;
do {
i
++;
sem_wait
(&mx_rk
);
pid
= rocks
[i
].
pid;
sem_post
(&mx_rk
);
} while (pid
!= NIL
);
ri
->i
= i
;
soft_task_def_arg
(mp
, (void *)ri
);
pid
= task_create
("Rock", rock
, &mp
, NULL
);
if (pid
!= NIL
) {
sem_wait
(&mx_rk
);
rocks
[i
].
pid = pid
;
sem_post
(&mx_rk
);
task_activate
(pid
);
nrock
++;
}
}
TASK rock_creator
()
{
while (1) {
sem_wait
(&mx_rn
);
if (rock_new.
i == 0) {
rock_create
(&rock_new
);
rock_new.
i = -1;
}
sem_post
(&mx_rn
);
if ((nrock
< ROCK_NMAX
/2) && (!kill_rock
) && (!crash
)) {
if ((rand()%ROCK_NMAX
) > nrock
) {
rock_new.
r = ROCK_RADIUS_I
;
rock_new.
x = rock_new.
y = 0;
rock_create
(&rock_new
);
}
}
task_endcycle
();
}
}
void reset_rock
()
{
kill_rock
= 1;
}
void start_rock
()
{
kill_rock
= 0;
}
void create_rock_task
()
{
SOFT_TASK_MODEL ms
;
soft_task_default_model
(ms
);
soft_task_def_ctrl_jet
(ms
);
soft_task_def_met
(ms
, ROCK_WCET
);
soft_task_def_period
(ms
,ROCK_PERIOD
*10);
soft_task_def_usemath
(ms
);
pid_RC
= task_create
("RockCreator", rock_creator
, &ms
, NULL
);
if (pid_RC
== NIL
) {
sys_shutdown_message
("Could not create task <RockCreator>\n");
exit(1);
} else
task_activate
(pid_RC
);
}
void init_rock
()
{
int i
;
nrock
= 0;
kill_rock
= 1;
for ( i
=0; i
<ROCK_NMAX
; i
++ ) rocks
[i
].
pid = NIL
;
create_rock_task
();
}