5 files changed, 9 insertions(+), 10 deletions(-)

M Physarum.xcodeproj/project.xcworkspace/xcuserdata/connorbell.xcuserdatad/UserInterfaceState.xcuserstate
M Physarum/Metal/Includes/noise.h
M Physarum/Metal/Includes/noise.metal
M Physarum/Metal/Shaders.metal
M Physarum/Metal/SimulationKernel.metal

@@ 9,5 9,6 @@
 #define noise_h
 
 float3 curl(float3 pos);
+float random(float n);
 
 #endif /* noise_h */

@@ 10,6 10,10 @@
 
 using namespace metal;
 
+float random(float n) {
+    return fract(sin(n) * 43758.5453123);
+}
+
 float4 permute(float4 x){return mod(((x*34.0)+1.0)*x, 289.0);}
 float4 taylorInvSqrt(float4 r){return 1.79284291400159 - 0.85373472095314 * r;}
 

@@ 9,13 9,10 @@
 #include "Includes/Particle.h"
 #include "Includes/SimParameters.h"
 #include "Includes/TexturePassParameters.h"
+#include "Includes/noise.h"
 
 using namespace metal;
 
-float randomOk(float n) {
-    return fract(sin(n) * 43758.5453123);
-}
-
 float3 hueShift(float3 color, float hue) {
     const float3 k = float3(0.57735, 0.57735, 0.57735);
     float cosAngle = cos(hue);


@@ 32,7 29,7 @@ kernel void setupParticles(device Particle *particles [[buffer(0)]],
     p.active = 0;
     p.position = float2(width/2.0,height/2.0) + (float2(cos(id*0.00235), sin(id*0.0059022))*(250+100));
 
-    p.sensorHeading = randomOk(id*0.034) * 6.28318;
+    p.sensorHeading = random(id*0.034) * 6.28318;
 
     particles[id] = p;
 }


@@ 58,7 55,7 @@ kernel void addParticles(device Particle *particles [[buffer(0)]],
     }
     particle.position = pos;
     
-    particle.sensorHeading = -1.5 + 3.14159 + startupProgress*3.14159*3.5 + randomOk(id*0.104) ;
+    particle.sensorHeading = -1.5 + 3.14159 + startupProgress*3.14159*3.5 + random(id*0.104) ;
     particles[index] = particle;
 }
 

@@ 10,13 10,10 @@
 #include "Includes/Particle.h"
 #include "Includes/SimParameters.h"
 #include "Includes/mod.h"
+#include "Includes/noise.h"
 
 using namespace metal;
 
-float random(float n) {
-    return fract(sin(n) * 3629135.423193);
-}
-
 // Write a 9x9 pixel area around the grid id with color, blended with the previous color
 void writePixelWithBlendedColor(float4 color,
                                   uint2 gid,