index cbc8e156ce5ff24ec6ef70e1a9150f34052f8a3d..219141884dd23ba9a59b2643135c78fcd83568e5 100644 (file)
--- a/game.c
+++ b/game.c
#define SPEED 0.00006
#define ROTATE 0.00004
+#define BULL_SPEED 0.008
Player g_player[MAX_PLAYERS];
+Bullet g_bullet[MAX_BULLETS];
+
+void g_player_set(unsigned int id, bool live, float x, float y, float r, float vx, float vy, float vr) {
+ assert(id < MAX_PLAYERS);
+ g_player[id] = (Player) {
+ .updated = true,
+ .live = live,
+ .x = x,
+ .y = y,
+ .r = r,
+ .vx = vx,
+ .vy = vy,
+ .vr = vr,
+ };
+}
+
+void g_bullet_set(unsigned int id, unsigned int owner, bool live, float x, float y, float vx, float vy, int tick) {
+ assert(id < MAX_BULLETS);
+ assert(owner < MAX_PLAYERS);
+ g_bullet[id] = (Bullet) {
+ .live = live,
+ .owner = owner,
+ .x = x,
+ .y = y,
+ .vx = vx,
+ .vy = vy,
+ .tick = tick,
+ };
+}
+
+static int freebullet() {
+ for(int i = 0; i < MAX_BULLETS; i++)
+ if(!g_bullet[i].live)
+ return i;
+ return -1;
+}
static void moveplayer(int id, float speed) {
g_player[id].vx += speed * cos(g_player[id].r * 2 * M_PI);
g_player[id].vy += speed * sin(g_player[id].r * 2 * M_PI);
}
+static void roteplayer(int id, float speed) {
+ g_player[id].vr += speed;
+}
+
+static void fireplayer(int id) {
+ int j = freebullet();
+ if(j < 0)
+ return;
+
+ float vx = BULL_SPEED * cos(g_player[id].r * 2 * M_PI);
+ float vy = BULL_SPEED * sin(g_player[id].r * 2 * M_PI);
+ g_bullet_set(j, id, true, g_player[id].x, g_player[id].y, vx, vy, 0);
+}
+
static void checkspacebound(float * a) {
float x = *a;
if(x < -1)
- x = abs(x);
+ x = fabs(x);
else if(x > 1)
x = -x;
*a = x;
}
-void g_player_set(unsigned int id, bool live, float x, float y, float r, float vx, float vy, float vr) {
- assert(id < MAX_PLAYERS);
- g_player[id] = (Player) {
- .updated = true,
- .live = live,
- .x = x,
- .y = y,
- .r = r,
- .vx = vx,
- .vy = vy,
- .vr = vr,
- };
+static bool collide(float x1, float y1, float r1, float x2, float y2, float r2) {
+ float l = sqrtf(powf(x1 - x2, 2) + powf(y1 - y2, 2));
+ return ((l - r1 - r2) <= 0);
}
void g_player_does(unsigned int id, DoesCode code) {
switch(code) {
case DOES_UP: moveplayer(id, SPEED); break;
case DOES_DOWN: moveplayer(id, -SPEED); break;
- case DOES_LEFT: g_player[id].vr -= ROTATE; break;
- case DOES_RIGHT: g_player[id].vr += ROTATE; break;
- case DOES_FIRE: break;
+ case DOES_LEFT: roteplayer(id, -ROTATE); break;
+ case DOES_RIGHT: roteplayer(id, ROTATE); break;
+ case DOES_FIRE: fireplayer(id); break;
}
}
checkspacebound(&g_player[i].y);
}
}
+
+ for(int i = 0; i < MAX_BULLETS; i++) {
+ if(g_bullet[i].live) {
+ g_bullet[i].updated = true;
+ g_bullet[i].tick += 1;
+ g_bullet[i].x += g_bullet[i].vx;
+ g_bullet[i].y += g_bullet[i].vy;
+
+ checkspacebound(&g_bullet[i].x);
+ checkspacebound(&g_bullet[i].y);
+
+ for(int j = 0; j < MAX_PLAYERS; j++)
+ if(g_player[j].live)
+ if(collide(g_bullet[i].x, g_bullet[i].y, 0.0001, g_player[j].x, g_player[j].y, PLAYER_SIZE))
+ if(j != g_bullet[i].owner)
+ g_player[j].live = false;
+
+ if(g_bullet[i].tick > BULLET_TIME)
+ g_bullet[i].live = false;
+ }
+ }
}