Change iteration counts, fix extra snapshots when no steps were taken

game/game.odin

@@ -73,9 +73,9 @@ Car :: struct {
 }
 
 SOLVER_CONFIG :: physics.Solver_Config {
-	timestep            = 1.0 / 120,
+	timestep            = 1.0 / 60,
 	gravity             = rl.Vector3{0, -9.8, 0},
-	substreps_minus_one = 2 - 1,
+	substreps_minus_one = 4 - 1,
 }
 
 Game_Memory :: struct {

game/physics/simulation.odin

@@ -173,11 +173,11 @@ simulate :: proc(
 
 	// bvh.debug_draw_bvh_bounds(&sim_state_bvh, body_aabbs, 0)
 
+	num_steps := 0
 	switch step_mode {
 	case .Accumulated_Time:
 		state.accumulated_time += dt
 
-		num_steps := 0
 		for state.accumulated_time >= config.timestep {
 			num_steps += 1
 			state.accumulated_time -= config.timestep
@@ -188,9 +188,10 @@ simulate :: proc(
 		}
 	case .Single:
 		simulate_step(get_next_sim_state(scene), config, potential_pairs)
+		num_steps += 1
 	}
 
-	if commit {
+	if num_steps > 0 && commit {
 		flip_sim_state(scene)
 	}