/**
* Returns the first normal, tangent, and bitangent for this face, using the first triangle available for tangent and bitangent.
* Does not rely on mesh.msh for normal or uv information - uses mesh.vertices & mesh.uv.
*/
public static void NormalTangentBitangent(Vector3[] vertices, Vector2[] uv, qe_Triangle tri, out Vector3 normal, out Vector3 tangent, out Vector3 bitangent)
{
normal = qe_Math.Normal(vertices[tri.x], vertices[tri.y], vertices[tri.z]);
Vector3 tan1 = Vector3.zero;
Vector3 tan2 = Vector3.zero;
Vector4 tan = new Vector4(0f, 0f, 0f, 1f);
long i1 = tri.x;
long i2 = tri.y;
long i3 = tri.z;
Vector3 v1 = vertices[i1];
Vector3 v2 = vertices[i2];
Vector3 v3 = vertices[i3];
Vector2 w1 = uv[i1];
Vector2 w2 = uv[i2];
Vector2 w3 = uv[i3];
float x1 = v2.x - v1.x;
float x2 = v3.x - v1.x;
float y1 = v2.y - v1.y;
float y2 = v3.y - v1.y;
float z1 = v2.z - v1.z;
float z2 = v3.z - v1.z;
float s1 = w2.x - w1.x;
float s2 = w3.x - w1.x;
float t1 = w2.y - w1.y;
float t2 = w3.y - w1.y;
float r = 1.0f / (s1 * t2 - s2 * t1);
Vector3 sdir = new Vector3((t2 * x1 - t1 * x2) * r, (t2 * y1 - t1 * y2) * r, (t2 * z1 - t1 * z2) * r);
Vector3 tdir = new Vector3((s1 * x2 - s2 * x1) * r, (s1 * y2 - s2 * y1) * r, (s1 * z2 - s2 * z1) * r);
tan1 += sdir;
tan2 += tdir;
Vector3 n = normal;
Vector3.OrthoNormalize(ref n, ref tan1);
tan.x = tan1.x;
tan.y = tan1.y;
tan.z = tan1.z;
tan.w = (Vector3.Dot(Vector3.Cross(n, tan1), tan2) < 0.0f) ? -1.0f : 1.0f;
tangent = ((Vector3)tan) * tan.w;
bitangent = Vector3.Cross(normal, tangent);
}
/**
* Get an array of qe_Triangle from this mesh.
*/
public qe_Triangle[] GetFaces()
{
int[] tris = cloneMesh.triangles;
qe_Triangle[] t = new qe_Triangle[tris.Length / 3];
int index = 0;
for (int i = 0; i < tris.Length; i += 3)
{
t[index++] = new qe_Triangle(tris[i], tris[i + 1], tris[i + 2]);
}
return(t);
}
void OnMouseUp(Event e)
{
if (!e.shift)
{
Undo.RecordObject(selection, "Clear Selection");
selection.Clear();
}
switch (elementMode)
{
case ElementMode.Vertex:
{
int index = -1;
if (qe_Editor_Utility.VertexRaycast(e.mousePosition, CLICK_RECT, selection, out index))
{
List <int> sel = selection.userIndices;
int indexOf = sel.IndexOf(index);
if (indexOf < 0)
{
sel.Add(index);
}
else
{
sel.RemoveAt(indexOf);
}
selection.SetIndices(sel);
break;
}
else
{
goto default;
}
}
case ElementMode.Edge:
{
qe_Edge edge;
if (qe_Editor_Utility.EdgeRaycast(e.mousePosition, selection, out edge))
{
List <qe_Edge> sel = selection.edges.Distinct().ToList();
int index = sel.IndexOf(edge);
if (index > -1)
{
sel.RemoveAt(index);
}
else
{
sel.Add(edge);
}
selection.SetEdges(sel);
}
else
{
goto case ElementMode.Face;
}
break;
}
case ElementMode.Face:
default:
{
qe_RaycastHit hit;
if (qe_Editor_Utility.MeshRaycast(HandleUtility.GUIPointToWorldRay(e.mousePosition), selection.mesh, out hit))
{
List <qe_Triangle> sel = selection.faces;
qe_Triangle tri = selection.mesh.faces[hit.FaceIndex];
int index = sel.IndexOf(tri);
if (index > -1)
{
sel.RemoveAt(index);
}
else
{
sel.Add(tri);
}
selection.SetFaces(sel);
}
break;
}
}
ResetHandles();
CacheIndicesForGraphics();
UpdateGraphics();
}
void UpdateElementHover(Vector2 mousePosition)
{
hovering.mode = elementMode;
int hash = hovering.hashCode;
bool wasValid = hovering.valid;
hovering.valid = false;
switch (elementMode)
{
case ElementMode.Vertex:
{
int tri = -1;
if (qe_Editor_Utility.VertexRaycast(mousePosition, CLICK_RECT, selection, out tri))
{
hovering.valid = true;
hovering.hashCode = tri.GetHashCode();
hovering.vertices[0] = selection.verticesInWorldSpace[tri];
}
}
break;
case ElementMode.Face:
{
qe_RaycastHit hit;
if (qe_Editor_Utility.MeshRaycast(HandleUtility.GUIPointToWorldRay(mousePosition), selection.mesh, out hit))
{
qe_Triangle face = selection.mesh.faces[hit.FaceIndex];
hovering.valid = true;
if (hash != face.GetHashCode())
{
hovering.hashCode = face.GetHashCode();
hovering.vertices[0] = selection.verticesInWorldSpace[face.x];
hovering.vertices[1] = selection.verticesInWorldSpace[face.y];
hovering.vertices[2] = selection.verticesInWorldSpace[face.z];
#if !UNITY_5
hovering.vertices[3] = selection.verticesInWorldSpace[face.z];
#endif
}
}
}
break;
case ElementMode.Edge:
{
qe_Edge edge;
if (qe_Editor_Utility.EdgeRaycast(mousePosition, selection, out edge))
{
hovering.valid = true;
if (hash != edge.GetHashCode())
{
hovering.hashCode = edge.GetHashCode();
hovering.vertices[0] = selection.verticesInWorldSpace[edge.x];
hovering.vertices[1] = selection.verticesInWorldSpace[edge.y];
}
}
}
break;
}
if (hash != hovering.hashCode || hovering.valid != wasValid)
{
SceneView.RepaintAll();
}
}
public static Vector3 Normal(this qe_Mesh mesh, qe_Triangle tri)
{
return(Normal(mesh.vertices[tri.x], mesh.vertices[tri.y], mesh.vertices[tri.z]));
}