X-Git-Url: http://deadsoftware.ru/gitweb?p=netwar.git;a=blobdiff_plain;f=game.c;h=2370692abdad4904825a910b65828b03821394a3;hp=cbc8e156ce5ff24ec6ef70e1a9150f34052f8a3d;hb=HEAD;hpb=c4b04d12861ae0eac6315b1c2170013422136f80

diff --git a/game.c b/game.c
index cbc8e15..2370692 100644
--- a/game.c
+++ b/game.c
@@ -6,26 +6,24 @@
 
 #include "game.h"
 
-#define SPEED  0.00006
-#define ROTATE 0.00004
+#define SPEED      (0.0005 / TICK)
+#define ROTATE     (0.03 / TICK)
+#define BULL_SPEED (0.4  / TICK)
 
-Player g_player[MAX_PLAYERS];
+#define MAX_SPEED  (0.1 / TICK)
+#define MAX_ROTATE (0.3 / TICK)
 
-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);
-}
+// Цифры взяты с потолка, но вроде неплохо подобраны
+#define G      6.6719199e-11
+#define M_STAR 3e8
+#define M_SHIP 0.001
 
-static void checkspacebound(float * a) {
-	float x = *a;
-	if(x < -1)
-		x = abs(x);
-	else if(x > 1)
-		x = -x;
-	*a = x;
-}
+Player g_player[MAX_PLAYERS];
+Bullet g_bullet[MAX_BULLETS];
+
+static bool svmode;
 
-void g_player_set(unsigned int id, bool live, float x, float y, float r, float vx, float vy, float vr) {
+void g_player_set(unsigned int id, bool live, float x, float y, float r, float vx, float vy, float vr, int shoot) {
 	assert(id < MAX_PLAYERS);
 	g_player[id] = (Player) {
 		.updated = true,
@@ -39,18 +37,92 @@ void g_player_set(unsigned int id, bool live, float x, float y, float r, float v
 	};
 }
 
-void g_player_does(unsigned int id, DoesCode code) {
-	assert(id < MAX_PLAYERS);
-	g_player[id].updated = true;
-	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;
+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) {
+	if(fabs(g_player[id].vx) < MAX_SPEED)
+		g_player[id].vx += speed * cos(g_player[id].r * 2 * M_PI);
+	if(fabs(g_player[id].vy) < MAX_SPEED)
+		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;
+	if(fabs(g_player[id].vr) > MAX_ROTATE)
+		g_player[id].vr = copysignf(MAX_ROTATE, g_player[id].vr);
+}
+
+static void fireplayer(int id) {
+	int j = freebullet();
+	if(j < 0)
+		return;
+
+	if(g_player[id].shoot < PLAYER_SHOOT)
+		return;
+
+	g_player[id].shoot = 0;
+
+	if(svmode) {
+		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 > 1)
+		x = copysign(fmodf(x, 1) + 1, -1 * x);
+	*a = x;
+}
+
+static float length(float x1, float y1, float x2, float y2) {
+	return sqrtf(powf(x1 - x2, 2) + powf(y1 - y2, 2));
+}
+
+static bool collide(float x1, float y1, float r1, float x2, float y2, float r2) {
+	return ((length(x1, y1, x2, y2) - r1 - r2) <= 0);
+}
+
+static void gravity(float * vx, float * vy, float x, float y) {
+	*vx += copysign(G * M_STAR * M_SHIP / length(0, 0, x, y), x * -1);
+	*vy += copysign(G * M_STAR * M_SHIP / length(0, 0, x, y), y * -1);
+}
+
+void g_player_does(unsigned int id, DoesBits code) {
+	assert(id < MAX_PLAYERS);
+
+	if(code.up)
+		moveplayer(id, SPEED);
+	if(code.down)
+		moveplayer(id, -SPEED);
+	if(code.left)
+		roteplayer(id, -ROTATE);
+	if(code.right)
+		roteplayer(id, ROTATE);
+	if(code.fire)
+		fireplayer(id);
+}
+
 void g_update() {
 	for(int i = 0; i < MAX_PLAYERS; i++) {
 		if(g_player[i].live) {
@@ -58,8 +130,46 @@ void g_update() {
 			g_player[i].x += g_player[i].vx;
 			g_player[i].y += g_player[i].vy;
 			g_player[i].r += g_player[i].vr;
+
+			gravity(&g_player[i].vx, &g_player[i].vy, g_player[i].x, g_player[i].y);
+
 			checkspacebound(&g_player[i].x);
 			checkspacebound(&g_player[i].y);
+
+			++g_player[i].shoot;
+			if(g_player[i].shoot > PLAYER_SHOOT)
+				g_player[i].shoot = PLAYER_SHOOT;
+
+			if(collide(g_player[i].x, g_player[i].y, PLAYER_SIZE, 0, 0, STAR_SIZE))
+				g_player[i].live = false;
+		}
+	}
+
+	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);
+
+			gravity(&g_bullet[i].vx, &g_bullet[i].vy, g_bullet[i].x, 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;
 		}
 	}
 }
+
+void g_init(bool server_mode) {
+	svmode = server_mode;
+	// TODO memset & co
+}