public void AddTriangleFan_FanAdded_FanInMesh()
{
GeometryConstructor gc = new GeometryConstructor();
Vector3[] vertices = new Vector3[]
{
Vector3.zero,
new Vector3(-1, -1, 0),
new Vector3(-1, 1, 0),
new Vector3(1, 1, 0),
new Vector3(1, -1, 0)
};
int[] indices = new int[vertices.Length];
for (int i = 0; i < vertices.Length; i++)
{
indices[i] = gc.AddVertex(vertices[i]);
}
int[] outerVertexIndices = new int[indices.Length - 1];
Array.Copy(indices, 1, outerVertexIndices, 0, indices.Length - 1);
gc.AddTriangleFan(indices[0], outerVertexIndices);
Mesh mesh = gc.ConstructMesh();
// check
Assert.AreEqual(gc.Vertices.ToArray(), vertices);
int[] expectedTriangles = new int[]
{
0, 1, 2,
0, 2, 3,
0, 3, 4,
};
Assert.AreEqual(gc.Triangles.ToArray(), expectedTriangles);
Assert.AreEqual(mesh.vertices, vertices);
Assert.AreEqual(mesh.triangles, expectedTriangles);
}
/// <summary>
/// Creates the rounded corner in the mesh constructor
/// </summary>
/// <param name="constructor">The mesh constructor to which the geometry of the corner should be added</param>
/// <param name="innerVertex">The index of the inner vertex around which the corner is rotated</param>
/// <param name="outerVertex1">The clockwise first outer vertex to which the rounded corner is connected</param>
/// <param name="outerVertex2">The clockwise second outer vertex to which the rounded corner is connected</param>
/// <param name="subdivisionCoordinates">The front coorindates of the vertices of the rounded corner</param>
/// <param name="isBackFace">True if the back faces should be generated</param>
private void CreateCorner(GeometryConstructor constructor, int innerVertex, int outerVertex1, int outerVertex2, Vector3[] subdivisionCoordinates, bool isBackFace)
{
// triangle fan must include existing endpoint vertices => two more entries in vertex indices
int[] iCornerVertices = new int[subdivisions + 2];
// determine at which depth the vertices should be placed
Vector3 depthVector = isBackFace ? new Vector3(0, 0, depth) : Vector3.zero;
// create the vertices and write the indices to the index array
iCornerVertices[0] = outerVertex1;
for (int i = 0; i < subdivisionCoordinates.Length; i++)
{
iCornerVertices[i + 1] = constructor.AddVertex(subdivisionCoordinates[i] + depthVector);
}
iCornerVertices[iCornerVertices.Length - 1] = outerVertex2;
// create the triangle fan which represents the rounded corner
constructor.AddTriangleFan(innerVertex, iCornerVertices, isBackFace);
}
