From 6eeca2096ce702fb992ea18118f858946c6c8e67 Mon Sep 17 00:00:00 2001
From: Benjamin Kraft <benjamin.kraft@online.de>
Date: Thu, 3 Feb 2022 19:18:46 +0100
Subject: [PATCH] better square function

---
 Fragment.glsl | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/Fragment.glsl b/Fragment.glsl
index bbe365f..12f1b3a 100644
--- a/Fragment.glsl
+++ b/Fragment.glsl
@@ -1,4 +1,5 @@
 #version 330 core
+
 out vec4 pixColor;
 
 uniform int iterationCount;
@@ -6,22 +7,22 @@ uniform float divergeThreshold;
 
 in vec2 complexPos;
 
-vec2 mul(in vec2 a, in vec2 b) {
-    return vec2(a.x * b.x - a.y * b.y, a.y * b.x + a.x * b.y);
-}
-
 vec3 getColor(in float value){
     vec3 red = vec3(0.5, 0, 0);
     vec3 blue = vec3(0, 0, 0.5);
     return value * red + (1 - value) * blue;
 }
 
+vec2 square(in vec2 c){
+    return vec2(c.x * c.x - c.y * c.y, 2 * c.x * c.y);
+}
+
 void main(){
 
     vec2 z;
     float stepsNeeded = 0;
     while (stepsNeeded < iterationCount && length(z) < divergeThreshold){
-        z = mul(z, z) + complexPos;
+        z = square(z) + complexPos;
         ++stepsNeeded;
     }