From 56431d0f571790efcdc6178ff641377c2b925520 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Miloslav=20=C4=8C=C3=AD=C5=BE?= <tastyfish@seznam.cz>
Date: Sat, 1 Sep 2018 12:04:17 +0200
Subject: [PATCH] Add fog

---
 game.cpp | 43 +++++++++++++++++++++++++++++++++++++------
 1 file changed, 37 insertions(+), 6 deletions(-)

diff --git a/game.cpp b/game.cpp
index 566148f..bbfcf8e 100644
--- a/game.cpp
+++ b/game.cpp
@@ -18,6 +18,9 @@ public:
     if (x > 12 || y > 12)
       return max(x,y) - 10;
 
+    if (x < 5 && x > 2 && y < 5 && y > 2)
+      return 1;
+
     return (x < 0 || y < 0 || x > 9 || y > 9) ? 1 : 0;
   }
 };
@@ -34,7 +37,7 @@ public:
     mCamera.direction = 660;
     mCamera.fovAngle = UNITS_PER_SQUARE / 4;
     mCamera.height = 0;
-    mCamera.resolution.x = 55;
+    mCamera.resolution.x = 36;
     mCamera.resolution.y = 88;
   } 
 };
@@ -48,11 +51,39 @@ Unit heightFunc(int16_t x, int16_t y)
   return level.getHeight(x,y) * UNITS_PER_SQUARE;
 }
 
+bool dither(uint8_t intensity, uint32_t x, uint32_t y)
+{
+  switch (intensity)
+  {
+    case 0: return false; break;
+    case 1: return x % 2 == 0 && y % 2 == 0; break;
+    case 2: return x % 2 == y % 2; break;
+    case 3: return x % 2 != 0 || y % 2 != 0; break;
+    default: return true; break;
+  }
+}
+
 void pixelFunc(PixelInfo pixel)
 {
-  p.display.color = pixel.isWall ? pixel.hit.direction + 4 : 3;
-  p.display.drawPixel(pixel.position.x * 2,pixel.position.y);
-  p.display.drawPixel(pixel.position.x * 2 + 1,pixel.position.y);
+  uint8_t c = pixel.isWall ? pixel.hit.direction + 4 : 3;
+
+  uint16_t x = pixel.position.x * 3;
+  uint16_t y = pixel.position.y;
+
+  uint8_t d = pixel.depth / (UNITS_PER_SQUARE * 2);
+
+  p.display.color = dither(d,x,y) ? 0 : c;
+  p.display.drawPixel(x,pixel.position.y);
+
+  x++;
+
+  p.display.color = dither(d,x,y) ? 0 : c;
+  p.display.drawPixel(x,pixel.position.y);
+
+  x++;
+
+  p.display.color = dither(d,x,y) ? 0 : c;
+  p.display.drawPixel(x,pixel.position.y);
 }
 
 void draw()
@@ -60,7 +91,7 @@ void draw()
   RayConstraints c;
 
   c.maxHits = 3;
-  c.maxSteps = 32;
+  c.maxSteps = 10;
 
   render(player.mCamera,heightFunc,pixelFunc,c);
 }
@@ -68,7 +99,7 @@ void draw()
 int main()
 {
   p.begin();
-  p.setFrameRate(60);
+  p.setFrameRate(30);
 
   p.display.setFont(fontTiny);