From 0a39ccd0b0c5b855fa7b5dea2082ced774923a62 Mon Sep 17 00:00:00 2001
From: Star Rauchenberger <fefferburbia@gmail.com>
Date: Sat, 19 Mar 2022 09:57:04 -0400
Subject: load line lag is better

---
 src/game.cpp | 37 +++++++++++++++++++++++++++++++++----
 src/game.h   |  4 ++++
 2 files changed, 37 insertions(+), 4 deletions(-)

diff --git a/src/game.cpp b/src/game.cpp
index 8e4dac5..31c682c 100644
--- a/src/game.cpp
+++ b/src/game.cpp
@@ -15,6 +15,9 @@ Game::Game(std::mt19937& rng, Muxer& muxer, Renderer& renderer) :
   losePopLampTimer.accumulate(losePopLampTimer.getDt());
 
   loadMap();
+  tick();
+  tick();
+  tick();
 
   for (int y = -1; y <= 1; y++)
   {
@@ -105,6 +108,27 @@ void Game::tickDirty(bool onlyDark) {
   std::swap(map.tiles(), mapDoubleBuffer);
 }
 
+void Game::tickOuter(bool onlyDark) {
+  mapDoubleBuffer = map.tiles();
+  map.resetDirty();
+
+  for (int y = 0; y < CHUNK_HEIGHT + 2; y++) {
+    for (int x = map.getLeft(); x < map.getRight(); x++) {
+      tickIndividual(*this, mapDoubleBuffer, x, map.getTop() + y, onlyDark);
+      tickIndividual(*this, mapDoubleBuffer, x, map.getBottom() - 1 - y, onlyDark);
+    }
+  }
+
+  for (int x = 0; x < CHUNK_WIDTH + 2; x++) {
+    for (int y = map.getTop() + CHUNK_HEIGHT + 2; y < map.getBottom() - CHUNK_HEIGHT - 2; y++) {
+      tickIndividual(*this, mapDoubleBuffer, map.getLeft() + x, y, onlyDark);
+      tickIndividual(*this, mapDoubleBuffer, map.getRight() - 1 - x, y, onlyDark);
+    }
+  }
+
+  std::swap(map.tiles(), mapDoubleBuffer);
+}
+
 void Game::tick(
   int x1,
   int y1,
@@ -577,10 +601,7 @@ void Game::loadMap() {
     newChunksVert,
     rng);
 
-  tick();
-  tick();
-  tick();
-
+  ticksNeeded = 3;
   dirtyLighting = true;
   dirtyRender = true;
 }
@@ -909,6 +930,14 @@ void Game::updatePlaying(size_t frameTime) {
     }
   }
 
+  if (ticksNeeded > 0) {
+    gradualTickTimer.accumulate(frameTime);
+    if (gradualTickTimer.step()) {
+      ticksNeeded--;
+      tickOuter();
+    }
+  }
+
   if (dirtyLighting)
   {
     recalculateLighting();
diff --git a/src/game.h b/src/game.h
index 6e676ae..0c4c89f 100644
--- a/src/game.h
+++ b/src/game.h
@@ -72,6 +72,8 @@ public:
   size_t numLamps = 0;
   size_t numDust = 0;
   std::vector<Tile> mapDoubleBuffer;
+  int ticksNeeded = 0;
+  Timer gradualTickTimer = {100};
 
   int player_x = 0;
   int player_y = 0;
@@ -115,6 +117,8 @@ private:
 
   void tickDirty(bool onlyDark);
 
+  void tickOuter(bool onlyDark = false);
+
   void tick(
     int x1,
     int y1,
-- 
cgit 1.4.1