/// <summary>
/// Picking sobre un triangulo
/// </summary>
public bool pickTriangle(out TgcTriangle triangle, out int triangleIndex)
{
pickingRay.updateRay();
var segmentA = pickingRay.Ray.Origin;
var segmentB = segmentA + TGCVector3.Scale(pickingRay.Ray.Direction, 10000f);
var minDist = float.MaxValue;
triangle = null;
triangleIndex = -1;
//Buscar la menor colision rayo-triangulo
for (var i = 0; i < Triangles.Count; i++)
{
var tri = Triangles[i];
float t;
TGCVector3 uvw;
TGCVector3 col;
if (TgcCollisionUtils.intersectLineTriangle(segmentA, segmentB, tri.A, tri.B, tri.C, out uvw, out t,
out col))
{
var dist = TGCVector3.Length(col - segmentA);
if (dist < minDist)
{
minDist = dist;
triangle = tri;
triangleIndex = i;
}
}
}
return(triangle != null);
}
/// <summary>
/// Crear a partir de un mesh
/// </summary>
public static TgcTriangleArray fromMesh(TgcMesh mesh, TgcD3dInput input)
{
var triangleArray = new TgcTriangleArray(input);
var vertices = mesh.getVertexPositions();
var triCount = vertices.Length / 3;
var triangles = new List <TgcTriangle>(triCount);
for (var i = 0; i < triCount; i++)
{
var v1 = vertices[i * 3];
var v2 = vertices[i * 3 + 1];
var v3 = vertices[i * 3 + 2];
var t = new TgcTriangle();
t.A = v1;
t.B = v2;
t.C = v3;
t.Color = Color.Red;
t.updateValues();
triangles.Add(t);
}
triangleArray.Triangles.AddRange(triangles);
return(triangleArray);
}
