Change starting value code to just jump to next orbit if in main bulb or

cardioid.

1 files changed, 19 insertions, 21 deletions

diff --git a/BuddhaTest/Shaders/BuddhaCompute.glsl b/BuddhaTest/Shaders/BuddhaCompute.glsl
index ec804cb..4e8e795 100644
--- a/BuddhaTest/Shaders/BuddhaCompute.glsl
+++ b/BuddhaTest/Shaders/BuddhaCompute.glsl
@@ -169,23 +169,6 @@ bool isInMainBulb(vec2 v)
     return sqrRadius<0.062499999;

 }

 

-vec2 getStartValue(uint seed, uint yDecoupler)

-{

-    uint hash = seed;

-

-    for(uint i = 0; i < 5;++i)

-    {

-        float x = hash1(hash,hash);

-        hash = (hash ^ intHash(yDecoupler));

-        float y = hash1(hash,hash);

-        vec2 random = vec2(x,y);

-        vec2 point = vec2(random.x * 3.5-2.5,random.y*1.55);

-        if(!(isInMainBulb(point) || isInMainCardioid(point)))

-            return point;

-    }

-    return vec2(0);

-}

-

 bool isGoingToBeDrawn(in vec2 offset, in uint totalIterations, inout vec2 lastVal, inout uint iterationsLeftThisFrame, inout uint doneIterations, out bool result)

 {

     uint endCount = doneIterations + iterationsLeftThisFrame > totalIterations ? totalIterations : doneIterations + iterationsLeftThisFrame;

@@ -253,12 +236,27 @@ void main() {
         if(phase == 0)

         {

             //new orbit:

+            //we know that iterationsLeftToDo is at least 1 by the while condition.

+            --iterationsLeftToDo; //count this as 1 iteration.

             uint seed = orbitNumber * totalWorkers + uniqueWorkerID;

             uint yDecoupler = orbitNumber;

-            offset = getStartValue(seed, yDecoupler);

-            lastPosition = vec2(0);

-            phase = 1;

-            doneIterations = 0;

+            float x = hash1(seed,seed);

+            seed = (seed ^ intHash(orbitNumber));

+            float y = hash1(seed,seed);

+            vec2 random = vec2(x,y);

+            offset = vec2(random.x * 3.5-2.5,random.y*1.55);

+            if(isInMainBulb(offset) || isInMainCardioid(offset))

+            {

+                // do not waste time drawing this orbit

+                ++orbitNumber;

+            }

+            else

+            {

+                //cool orbit!

+                lastPosition = vec2(0);

+                phase = 1;

+                doneIterations = 0;

+            }

         }

         if(phase == 1)

         {