From e2fde68c4f27fccbfa2d430e1fd795bf459cb615 Mon Sep 17 00:00:00 2001
From: erdgeist <erdgeist@bauklotz.fritz.box>
Date: Mon, 16 Apr 2018 19:10:21 +0200
Subject: Move normalization math back to the function it belongs

---
 engine.c | 18 +++++++-----------
 1 file changed, 7 insertions(+), 11 deletions(-)

(limited to 'engine.c')

diff --git a/engine.c b/engine.c
index 5188fbd..ada3756 100644
--- a/engine.c
+++ b/engine.c
@@ -23,6 +23,13 @@ static void highlight_line(int value, int y, int max_x, uint32_t color);
 static int64_t
 engine_normalize(int height, int y)
 {
+    /*
+       double xf = ((double)x) / 100.0f;
+       double yf = g_normalize_factor * (xf*xf-xf) + xf;
+       y = ax^2 + x - ax = a * (x^2 - x) + x
+       int y = scale(g_min_y + (int)(((double)height) * yf));
+     */
+
     int64_t yf = (y << 16) / height;
     yf = (((yf * yf - (yf << 16)) * ((int64_t)g_normalize_factor))) + (yf << 32);
     return (((int64_t)height) * yf) >> 32;
@@ -58,17 +65,6 @@ engine_redraw()
 
         for (int x=0; x<height; x+=20) {
             int y = engine_normalize(height, x);
-            /*
-            int64_t xf = (x << 16) / 100;
-            int64_t yf = (((xf * xf - (xf << 16)) * ((int64_t)g_normalize_factor))) + (xf << 32);
-            int64_t yo = (((int64_t)height) * yf) >> 48;
-
-            double xf = ((double)x) / 100.0f;
-            double yf = g_normalize_factor * (xf*xf-xf) + xf;
-            y = ax^2 + x - ax = a * (x^2 - x) + x
-            int y = scale(g_min_y + (int)(((double)height) * yf));
-            */
-
             display_line_color(0, scale(g_min_y + (y>>16)), MAX_X, scale(g_min_y + (y>>16)), 0x1f1f1f1f);
             if (y >> 16 > (tos2 * height) / 100 )
                 t1++;
-- 
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