Separated Assets to Resources (Engine assets) and Assets (Project specific)

+ AssetHierarchy: Exposed RootNode
+ ContentBrowserWindow: Fixed Empty Folder not being Leaf-Node
+ TreeNode: Added IsParentOf, IsChildOf and IsInSubtree.
    + Fixed InternalDeleteTreeAndChildren for null trees

GlitchyEditor/resources/Shaders/ShaderHelpers.hlsl

@@ -0,0 +1,90 @@
+#ifndef __SHADER_HELPERS_HLSL__
+#define __SHADER_HELPERS_HLSL__
+
+#define PI 3.14159265358979323846f
+
+/*
+* Calculates the weighted sum of two normal vectors.
+* nrm1: The first normal vector
+* nrm2: The second normal vector
+* a: The weight factor for nrm1
+* b: The weight factor for nrm2
+*/
+float3 BlendNormals(float3 nrm1, float3 nrm2, float a, float b)
+{    
+    return normalize(float3(a * nrm1.x / nrm1.z + b * nrm2.x / nrm2.z, 
+         a * nrm1.y / nrm1.z + b * nrm2.y / nrm2.z, 
+         1.0f));
+}
+
+/*
+* Scales a normal vector by a factor where 0 results in the vector (0, 0, 1)
+* nrm: The normal vector
+* a: The scaling factor
+*/
+float3 ScaleNormal(float3 nrm1, float a)
+{    
+    return normalize(float3(a * nrm1.x / nrm1.z, 
+         a * nrm1.y / nrm1.z, 
+         1.0f));
+}
+
+/*
+* Scales a normal vector by a factor where 0 results in the vector (0, 0, 1)
+* nrm: The normal vector
+* a: The scaling factor
+*/
+float3 ScaleNormal(float3 nrm1, float2 a)
+{
+    return normalize(float3(a.x * nrm1.x / nrm1.z,
+							a.y * nrm1.y / nrm1.z,
+							1.0f));
+}
+
+/*
+* Reconstructs the z-component of a normalized normal vector from a two-component value
+* cnrm: The x- and y-components of a normalized normal vector
+*/
+float3 DecompressNormal(float2 cnrm)
+{
+    return float3(cnrm, sqrt(1.0 - cnrm.x * cnrm.x - cnrm.y * cnrm.y));    
+}
+
+/*
+* Reconstructs the tangent space from a normal and a tangent
+* normal: The surface normal
+* tangent: The surface tangent
+* sigma: Defines the handedness of the tangent space matrix. 1.0 if it is right handend. -1.0 if it is left handed
+*/
+float3x3 ConstructTangentSpace(float3 normal, float3 tangent, float3 sigma)
+{
+    float3 n = normalize(normal);
+    float3 t = normalize(tangent - n * dot(tangent, n));
+    float3 b = cross(n, t) * sigma;
+    
+    return float3x3(t, b, n);
+}
+
+/**
+ * Calculates the luminance of an rgb-value.
+ * @param rgb The rgb color.
+ * @return The luminance of the given rgb color.
+ */
+float ColorToLuminance(float3 rgb)
+{
+    return rgb.r * 0.212639 + rgb.g * 0.715169 + rgb.b * 0.072192;    
+}
+
+/**
+ * Extrancts the handedness of the bitangent that is encoded in the z-component of the tangent.
+ * @param tangentz The z-component of the tangent with the handedness encoded.
+ * @return The handedness of the bitangent (bitangent = handedness * tangent x normal)
+ */
+float GetBitangentHandedness(float tangentz)
+{
+	// handedness is in least significant bit of tangent.z
+    uint z = asuint(tangentz);
+    return (z & 1) > 0 ? 1.0 : -1.0;
+}
+
+#endif // __SHADER_HELPERS_HLSL__