X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=antikythera;a=blobdiff_plain;f=src%2Fmachine.cc;fp=src%2Fmachine.cc;h=274362a3a60f12e6e66a5e47e918d3c2a282e6ab;hp=1a78452ccdc47ec54eb3c4615936ac728cc73522;hb=2c8e92970f198061a0cefdb59c2d0ec8c58409c9;hpb=84484521a697fe60f63bff077b9ba7475a45e54e

diff --git a/src/machine.cc b/src/machine.cc
index 1a78452..274362a 100644
--- a/src/machine.cc
+++ b/src/machine.cc
@@ -9,6 +9,7 @@ static float delta_angle(float a, float b);
 Machine::Machine()
 {
 	meshing = 0;
+	meshing_valid = false;
 	visited = 0;
 }
 
@@ -29,6 +30,7 @@ Machine::~Machine()
 void Machine::add_gear(Gear *g)
 {
 	gears.push_back(g);
+	meshing_valid = false;
 }
 
 void Machine::add_motor(int gearidx, float speed_hz)
@@ -39,6 +41,11 @@ void Machine::add_motor(int gearidx, float speed_hz)
 	motors.push_back(m);
 }
 
+void Machine::invalidate_meshing()
+{
+	meshing_valid = false;
+}
+
 void Machine::calc_meshing()
 {
 	int ngears = (int)gears.size();
@@ -142,6 +149,11 @@ void Machine::update(float dt)
 {
 	int ngears = (int)gears.size();
 
+	if(!meshing_valid) {
+		calc_meshing();
+		meshing_valid = true;
+	}
+
 	memset(visited, 0, ngears * sizeof *visited);
 	for(size_t i=0; i<motors.size(); i++) {
 		int gidx = motors[i].drive;