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GSDRootUtil.cs
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GSDRootUtil.cs
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#region "Imports"
using UnityEngine;
//using System.Collections; // Unused
using System.Xml;
using System.Xml.Serialization;
using System.IO;
using System.Text;
#endregion
namespace GSD
{
public static class GSDRootUtil
{
/// <summary>
/// Smooths the input parameter t.
/// If less than k1 ir greater than k2, it uses a sin.
/// Between k1 and k2 it uses linear interp.
/// </summary>
public static float Ease(float t, float k1, float k2)
{
float f;
float s;
f = k1 * 2 / Mathf.PI + k2 - k1 + (1.0f - k2) * 2 / Mathf.PI;
if (t < k1)
{
s = k1 * (2 / Mathf.PI) * (Mathf.Sin((t / k1) * Mathf.PI / 2 - Mathf.PI / 2) + 1);
}
else if (t < k2)
{
s = (2 * k1 / Mathf.PI + t - k1);
}
else
{
s = 2 * k1 / Mathf.PI + k2 - k1 + ((1 - k2) * (2 / Mathf.PI)) * Mathf.Sin(((t - k2) / (1.0f - k2)) * Mathf.PI / 2);
}
return (s / f);
}
/// <summary>
/// Returns true if the lines intersect, otherwise false.
/// </summary>
/// <param name="Line1S">Line 1 start.</param>
/// <param name="Line1E">Line 1 end.</param>
/// <param name="Line2S">Line 2 start.</param>
/// <param name="Line2E">Line 2 end.</param>
/// <param name="intersectionPoint">If the lines intersect, intersectionPoint holds the intersection point.</param>
/// <returns></returns>
public static bool Intersects2D(ref Vector2 Line1S, ref Vector2 Line1E, ref Vector2 Line2S, ref Vector2 Line2E, out Vector2 intersectionPoint)
{
float firstLineSlopeX, firstLineSlopeY, secondLineSlopeX, secondLineSlopeY;
firstLineSlopeX = Line1E.x - Line1S.x;
firstLineSlopeY = Line1E.y - Line1S.y;
secondLineSlopeX = Line2E.x - Line2S.x;
secondLineSlopeY = Line2E.y - Line2S.y;
float s, t;
s = (-firstLineSlopeY * (Line1S.x - Line2S.x) + firstLineSlopeX * (Line1S.y - Line2S.y)) / (-secondLineSlopeX * firstLineSlopeY + firstLineSlopeX * secondLineSlopeY);
t = (secondLineSlopeX * (Line1S.y - Line2S.y) - secondLineSlopeY * (Line1S.x - Line2S.x)) / (-secondLineSlopeX * firstLineSlopeY + firstLineSlopeX * secondLineSlopeY);
if (s >= 0 && s <= 1 && t >= 0 && t <= 1)
{
float intersectionPointX = Line1S.x + (t * firstLineSlopeX);
float intersectionPointY = Line1S.y + (t * firstLineSlopeY);
// Collision detected
intersectionPoint = new Vector2(intersectionPointX, intersectionPointY);
return true;
}
intersectionPoint = Vector2.zero;
return false; // No collision
}
public static string GetPrefabString(GameObject tObj)
{
string tString = "";
#if UNITY_EDITOR
if (tObj != null)
{
tString = UnityEditor.AssetDatabase.GetAssetPath(tObj);
if (tString == null || tString.Length < 1)
{
#if UNITY_2018_2_OR_NEWER
Object parentObject = UnityEditor.PrefabUtility.GetCorrespondingObjectFromSource(tObj);
#else
Object parentObject = UnityEditor.PrefabUtility.GetPrefabParent(tObj);
#endif
tString = UnityEditor.AssetDatabase.GetAssetPath(parentObject);
}
}
#endif
return tString;
}
#region "Float comparisons"
public static bool IsApproximately(float a, float b, float _tolerance = 0.01f)
{
return Mathf.Abs(a - b) < _tolerance;
}
#endregion
#region "XML"
public static void CreateXML<T>(ref string tPath, object pObject)
{
#if UNITY_WEBPLAYER
return;
#else
string tData = SerializeObject<T>(ref pObject);
StreamWriter writer;
FileInfo t = new FileInfo(tPath);
if (!t.Exists)
{
writer = t.CreateText();
}
else
{
t.Delete();
writer = t.CreateText();
}
writer.Write(tData);
writer.Close();
#endif
}
public static string GetString<T>(object pObject)
{
string tData = SerializeObject<T>(ref pObject);
return tData;
}
public static object LoadXML<T>(ref string tPath)
{
#if UNITY_WEBPLAYER
return null;
#else
StreamReader r = File.OpenText(tPath);
string _info = r.ReadToEnd();
r.Close();
object tObject = DeserializeObject<T>(_info);
return tObject;
#endif
}
public static object LoadData<T>(ref string _info)
{
object tObject = DeserializeObject<T>(_info);
return tObject;
}
public static void DeleteLibraryXML(string tName, bool bIsExtrusion)
{
#if UNITY_WEBPLAYER
return;
#else
string tPath;
if (bIsExtrusion)
{
tPath = Application.dataPath + "/RoadArchitect/Library/ESO" + tName + ".gsd";
}
else
{
tPath = Application.dataPath + "/RoadArchitect/Library/EOM" + tName + ".gsd";
}
if (File.Exists(tPath))
{
File.Delete(tPath);
}
#endif
}
private static string SerializeObject<T>(ref object pObject)
{
string XmlizedString = null;
MemoryStream memoryStream = new MemoryStream();
XmlSerializer xs = new XmlSerializer(typeof(T));
XmlTextWriter xmlTextWriter = new XmlTextWriter(memoryStream, Encoding.UTF8);
xs.Serialize(xmlTextWriter, pObject);
memoryStream = (MemoryStream) xmlTextWriter.BaseStream;
XmlizedString = UTF8ByteArrayToString(memoryStream.ToArray());
return XmlizedString;
}
private static object DeserializeObject<T>(string pXmlizedString)
{
XmlSerializer xs = new XmlSerializer(typeof(T));
MemoryStream memoryStream = new MemoryStream(StringToUTF8ByteArray(pXmlizedString));
return xs.Deserialize(memoryStream);
}
private static string UTF8ByteArrayToString(byte[] characters)
{
UTF8Encoding encoding = new UTF8Encoding();
string constructedString = encoding.GetString(characters);
return (constructedString);
}
private static byte[] StringToUTF8ByteArray(string pXmlString)
{
UTF8Encoding encoding = new UTF8Encoding();
byte[] byteArray = encoding.GetBytes(pXmlString);
return byteArray;
}
#endregion
#region "Mesh tangents"
//Thread safe because local scope and by val params
public static Vector4[] ProcessTangents(int[] tris, Vector3[] normals, Vector2[] uvs, Vector3[] verts)
{
int MVL = verts.Length;
if (MVL == 0)
{
return new Vector4[0];
}
int triangleCount = tris.Length;// mesh.triangles.Length / 3;
Vector3[] tan1 = new Vector3[MVL];
Vector3[] tan2 = new Vector3[MVL];
Vector4[] tangents = new Vector4[MVL];
int i1, i2, i3;
Vector3 v1, v2, v3;
Vector2 w1, w2, w3;
float x1, x2, y1, y2, z1, z2, s1, s2, t1, t2, r;
Vector3 sdir, tdir;
float div = 0f;
for (int a = 0; a < triangleCount; a += 3)
{
i1 = tris[a + 0];
i2 = tris[a + 1];
i3 = tris[a + 2];
v1 = verts[i1];
v2 = verts[i2];
v3 = verts[i3];
w1 = uvs[i1];
w2 = uvs[i2];
w3 = uvs[i3];
x1 = v2.x - v1.x;
x2 = v3.x - v1.x;
y1 = v2.y - v1.y;
y2 = v3.y - v1.y;
z1 = v2.z - v1.z;
z2 = v3.z - v1.z;
s1 = w2.x - w1.x;
s2 = w3.x - w1.x;
t1 = w2.y - w1.y;
t2 = w3.y - w1.y;
// r = 1.0f / (s1 * t2 - s2 * t1);
div = (s1 * t2 - s2 * t1);
r = div == 0.0f ? 0.0f : 1.0f / div;
sdir = new Vector3((t2 * x1 - t1 * x2) * r, (t2 * y1 - t1 * y2) * r, (t2 * z1 - t1 * z2) * r);
tdir = new Vector3((s1 * x2 - s2 * x1) * r, (s1 * y2 - s2 * y1) * r, (s1 * z2 - s2 * z1) * r);
tan1[i1] += sdir;
tan1[i2] += sdir;
tan1[i3] += sdir;
tan2[i1] += tdir;
tan2[i2] += tdir;
tan2[i3] += tdir;
}
Vector3 n, t;//,tmp;
for (int index = 0; index < MVL; index++)
{
n = normals[index];
t = tan1[index];
Vector3.OrthoNormalize(ref n, ref t);
tangents[index].x = t.x;
tangents[index].y = t.y;
tangents[index].z = t.z;
tangents[index].w = (Vector3.Dot(Vector3.Cross(n, t), tan2[index]) < 0.0f) ? -1.0f : 1.0f;
// tmp = (t - n * Vector3.Dot(n, t)).normalized;
// tangents[i] = new Vector4(tmp.x, tmp.y, tmp.z);
// tangents[i].w = (Vector3.Dot(Vector3.Cross(n, t), tan2[i]) < 0.0f) ? -1.0f : 1.0f;
}
return tangents;
}
public static void ProcessTangents(ref Mesh tMesh)
{
Vector3[] tVerts = tMesh.vertices;
Vector2[] tUV = tMesh.uv;
Vector3[] tNormals = tMesh.normals;
int[] tTris = tMesh.triangles;
tMesh.tangents = ProcessTangents(tTris, tNormals, tUV, tVerts);
}
#endregion
#region "Default directory for library etc"
public static string Dir_GetBase()
{
return Application.dataPath.Replace("/Assets", "/GSD/");
}
public static string Dir_GetTH()
{
string xPath = Dir_GetBase() + "TH/";
if (!Directory.Exists(xPath))
{
Directory.CreateDirectory(xPath);
}
return xPath;
}
public static string Dir_GetLibraryBase()
{
return GSD.Roads.GSDRoadUtilityEditor.GetBasePath() + "/Editor/Library/";
}
public static string Dir_GetLibrary()
{
string xPath = Dir_GetLibraryBase();
if (!Directory.Exists(xPath))
{
Directory.CreateDirectory(xPath);
}
return xPath;
}
public static void Dir_GetLibrary_CheckSpecialDirs()
{
string xPath = Dir_GetLibraryBase() + "Q/";
if (!Directory.Exists(xPath))
{
Directory.CreateDirectory(xPath);
}
xPath = Dir_GetLibraryBase() + "W/";
if (!Directory.Exists(xPath))
{
Directory.CreateDirectory(xPath);
}
xPath = Dir_GetLibraryBase() + "B/";
if (!Directory.Exists(xPath))
{
Directory.CreateDirectory(xPath);
}
xPath = Dir_GetLibraryBase() + "B/W/";
if (!Directory.Exists(xPath))
{
Directory.CreateDirectory(xPath);
}
}
#endregion
public static void ForceCollection(bool bWait = false)
{
#if UNITY_EDITOR
System.GC.Collect();
if (bWait)
{
System.GC.WaitForPendingFinalizers();
}
Resources.UnloadUnusedAssets();
#endif
}
#region "Profiling"
public static void StartProfiling(GSDRoad _road, string _profileName)
{
if (_road.bProfiling)
{
UnityEngine.Profiling.Profiler.BeginSample(_profileName);
}
}
public static void EndProfiling(GSDRoad _road)
{
if (_road.bProfiling)
{
UnityEngine.Profiling.Profiler.EndSample();
}
}
public static void EndStartProfiling(GSDRoad _road, string _profileName)
{
if (_road.bProfiling)
{
UnityEngine.Profiling.Profiler.EndSample();
UnityEngine.Profiling.Profiler.BeginSample(_profileName);
}
}
#endregion
}
}