1 files changed, 63 insertions, 0 deletions
diff --git a/universe.c b/universe.c
new file mode 100644
index 0000000..32869b5
--- /dev/null
+++ b/universe.c
@@ -0,0 +1,63 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include "libgeometry/geometry.h"
+#include "dat.h"
+#include "fns.h"
+
+static void
+universe_step(Universe *u, double Δt)
+{
+	//integrate(u, u->t, Δt);
+}
+
+static void
+universe_reset(Universe *u)
+{
+	int i, j;
+
+	for(i = 0; i < nelem(u->ships); i++){
+		for(j = 0; j < nelem(u->ships[i].rounds); j++)
+			memset(&u->ships[i].rounds[j], 0, sizeof(Bullet));
+		memset(&u->ships[i].Particle, 0, sizeof(Particle));
+	}
+	memset(&u->star.Particle, 0, sizeof(Particle));
+	inituniverse(u);
+}
+
+void
+inituniverse(Universe *u)
+{
+	u->ships[0].p = Pt2(SCRW/2-50,SCRH/2-50,1);
+	u->ships[0].θ = (180+45)*DEG;
+	u->ships[0].mass = 10e3; /* 10 tons */
+	u->ships[0].kind = NEEDLE;
+	u->ships[0].fuel = 100;
+
+	u->ships[1].p = Pt2(-SCRW/2+50,-SCRH/2+50,1);
+	u->ships[1].θ = 45*DEG;
+	u->ships[1].mass = 40e3; /* 40 tons */
+	u->ships[1].kind = WEDGE;
+	u->ships[1].fuel = 200;
+
+	u->star.p = Pt2(0,0,1);
+	u->star.mass = 5.97e24; /* earth's mass */
+}
+
+Universe *
+newuniverse(void)
+{
+	Universe *u;
+
+	u = emalloc(sizeof(Universe));
+	memset(u, 0, sizeof *u);
+	u->step = universe_step;
+	u->reset = universe_reset;
+	return u;
+}
+
+void
+deluniverse(Universe *u)
+{
+	free(u);
+}