Shader visualizer (#83)

* Fixed the Shader Reloader and added includes

TGC.MonoGame.Samples/Content/Effects/ShaderIncludes.fx

@@ -0,0 +1,49 @@
+float plot(float originalY, float functionResult) 
+{    
+    return smoothstep(0.02, 0.0, abs(functionResult - originalY));
+}
+
+float sdSegment(float2 initialPoint, float2 a, float2 b)
+{
+    float2 pa = initialPoint - a;
+    float2 ba = b - a;
+    float h = clamp( dot(pa,ba)/dot(ba,ba), 0.0, 1.0 );
+    return length( pa - ba*h );
+}
+
+float sdCircle(float2 initialPoint, float radius)
+{
+    return length(initialPoint) - radius;
+}
+
+float sdBox( in float2 p, in float2 b )
+{
+    float2 d = abs(p)-b;
+    return length(max(d,0.0)) + min(max(d.x,d.y),0.0);
+}
+
+float2x2 rotation2D(float angle)
+{
+    float sinAngle = sin(angle);
+    float cosAngle = cos(angle);
+
+    return float2x2(cosAngle, -sinAngle,
+                sinAngle, cosAngle);
+}
+
+float2 random2(float2 p) 
+{
+    return frac(sin(float2(dot(p,float2(127.1,311.7)),dot(p,float2(269.5,183.3))))*43758.5453);
+}
+
+float3 random3(float3 c)
+{
+    float j = 4096.0 * sin(dot(c, float3(17.0, 59.4, 15.0)));
+    float3 r;
+    r.z = frac(512.0 * j);
+    j *= .125;
+    r.x = frac(512.0 * j);
+    j *= .125;
+    r.y = frac(512.0 * j);
+    return r;
+}

TGC.MonoGame.Samples/Content/Effects/ShaderVisualizer.fx

@@ -7,6 +7,8 @@
 	#define PS_SHADERMODEL ps_4_0_level_9_1
 #endif
 
+#include "ShaderIncludes.fx"
+
 float Time = 0.0;
 
 struct VertexShaderInput

TGC.MonoGame.Samples/Samples/Shaders/ShaderReloader/ShaderReloader.cs

@@ -60,7 +60,7 @@ private void ConfigureWatcher()
         private void ReplaceShader(object sender, FileSystemEventArgs eventArgs)
         {
             // Can be triggered by temp files with suffixes
-            if (!eventArgs.Name.Equals(ShaderCodeFileName))
+            if (eventArgs.Name.Equals(ShaderCodeFileName))
             {
                 CompileShader();
                 if (!CompileError)