public static SurfaceComponentGeometry CreateExtrudedPolygonCapGeometry(
float radius, float height, int segmentP, int segmentH, float topRatio = 1, int surfaceGroup = 0, RenderGeometry.FaceType faceType = RenderGeometry.FaceType.Smooth,
bool splitBoundary = false)
{
if (topRatio == 0)
{
return(CreateConeCapGeometry(radius, height, segmentP, segmentH, 0, surfaceGroup, faceType, splitBoundary));
}
if (topRatio == 1 && height == 0)
{
return(CreateRegularPolygonGeometry(radius, segmentP, surfaceGroup, RenderGeometry.FaceType.Polygonal, true));
}
StructureGeometry structure = new StructureGeometry();
SurfaceComponentGeometry upperCap = CreateRegularPolygonGeometry(radius * topRatio, segmentP, surfaceGroup + 1);
SurfaceComponentGeometry side = CreateConeSideGeometry(radius, radius * topRatio, height, segmentP, segmentH, 0, false, surfaceGroup, faceType);
side.ApplyOffset(Vector3.up * (height / 2));
Vertex cornerUp = structure.CreateVertex(new Vector3(radius * topRatio, height, 0));
Vertex cornerDown = structure.CreateVertex(new Vector3(radius, 0, 0));
structure.CreateFace(side, false, cornerUp, cornerUp, cornerDown, cornerDown);
structure.CreateFace(upperCap, true, cornerUp);
SurfaceComponentGeometry geometry = new SurfaceComponentGeometry(structure.Build());
geometry.DefineBoundaries(structure.GetBuiltVertex(cornerDown));
if (splitBoundary)
{
geometry.SplitBoundaries();
}
return(geometry);
}
public static SurfaceComponentGeometry CreateStarConvexPolygonGeometry(List <Vector3> vertices, int surfaceGroup = 0, RenderGeometry.FaceType faceType = RenderGeometry.FaceType.Polygonal)
{
SurfaceComponentGeometry geometry = new SurfaceComponentGeometry();
bool normalRequired = (faceType != RenderGeometry.FaceType.Polygonal && faceType != RenderGeometry.FaceType.Triangular);
foreach (Vector3 vertex in vertices)
{
geometry.CreateVertex(vertex);
}
for (int i = 1; i < vertices.Count - 1; i++)
{
Face f = geometry.CreateFace(geometry.vertices[0], geometry.vertices[i], geometry.vertices[i + 1]);
f.surfaceGroup = surfaceGroup;
geometry.SetFaceType(f, faceType);
}
if (normalRequired)
{
Vector3 normal = Vector3.Cross(geometry.vertices[1].p - geometry.vertices[0].p, geometry.vertices[vertices.Count - 1].p - geometry.vertices[0].p).normalized;
foreach (Halfedge e in geometry.halfedges)
{
geometry.SetNormal(e, normal);
}
}
geometry.DefineBoundaries(geometry.vertices[0]);
geometry.SplitBoundaries();
return(geometry);
}
public static SurfaceComponentGeometry CreateRegularPolygonGeometry(
float radius, int segmentP, int surfaceGroup = 0, RenderGeometry.FaceType faceType = RenderGeometry.FaceType.Polygonal, bool splitBoundary = false)
{
SurfaceComponentGeometry geometry = new SurfaceComponentGeometry();
bool normalRequired = (faceType != RenderGeometry.FaceType.Polygonal && faceType != RenderGeometry.FaceType.Triangular);
float dth = 2 * Mathf.PI / segmentP;
for (int i = 0; i < segmentP; i++)
{
geometry.CreateVertex(new Vector3(radius * Mathf.Cos(dth * i), 0, -radius * Mathf.Sin(dth * i)));
}
Face f = geometry.CreateFace(geometry.vertices.ToArray());
f.surfaceGroup = surfaceGroup;
geometry.SetFaceType(f, faceType);
if (normalRequired)
{
foreach (Halfedge e in geometry.halfedges)
{
geometry.SetNormal(e, Vector3.up);
}
}
geometry.DefineBoundaries(geometry.vertices[0]);
if (splitBoundary)
{
geometry.SplitBoundaries();
}
return(geometry);
}
public static SurfaceComponentGeometry CreateTrianglesCombinedRegularPolygonGeometry(float radius, int segmentP, Func <SurfaceComponentGeometry> triangleSurfaceComponentProvider)
{
SurfaceComponentGeometry polygonGeometry = SurfaceComponentGeometries.CreateFanCapGeometry(radius, segmentP, 1);
polygonGeometry.SplitBoundaries();
List <Vertex> corners = polygonGeometry.corners;
var structure = new StructureGeometry(polygonGeometry);
structure.faces.ForEach(f => structure.SetFaceComponent(f, triangleSurfaceComponentProvider(), true));
var geometry = new SurfaceComponentGeometry(structure.Build());
geometry.DefineBoundaries(corners.Select(structure.GetBuiltVertex).ToArray());
return(geometry);
}
public static SurfaceComponentGeometry CreateConeCapGeometry(
float radius, float height, int segmentP, int segmentR, float cutAngle = 0, int surfaceGroup = 0, RenderGeometry.FaceType faceType = RenderGeometry.FaceType.Smooth,
bool splitBoundary = false)
{
SurfaceComponentGeometry geometry = new SurfaceComponentGeometry();
bool normalRequired = (faceType != RenderGeometry.FaceType.Polygonal && faceType != RenderGeometry.FaceType.Triangular);
bool tangentRequired = (faceType == RenderGeometry.FaceType.Directinal1 || faceType == RenderGeometry.FaceType.Directinal2);
int n = cutAngle > 0 ? segmentP + 1 : segmentP;
float deltaAngle = (2 * Mathf.PI - cutAngle) / segmentP;
float Angle(float th) => cutAngle + deltaAngle * th;
for (int rr = 0; rr < segmentR; rr++)
{
for (int th = 0; th < n; th++)
{
float r = radius * (segmentR - rr) / segmentR;
float h = height * rr / segmentR;
geometry.CreateVertex(new Vector3(r * Mathf.Cos(Angle(th)), h, -r * Mathf.Sin(Angle(th))));
}
}
Vertex vertice(int rr, int th) => geometry.vertices[rr * n + th];
Vertex center = geometry.CreateVertex(new Vector3(0, height, 0));
for (int rr = 0; rr < segmentR - 1; rr++)
{
for (int th = 0; th < segmentP; th++)
{
int th2 = (th + 1) % n;
Face f = geometry.CreateFace(vertice(rr, th), vertice(rr, th2), vertice(rr + 1, th2), vertice(rr + 1, th));
if (tangentRequired)
{
List <Halfedge> edges = f.edges;
geometry.SetTangent(edges[1], -edges[1].vector.normalized);
geometry.SetTangent(edges[3], -edges[3].vector.normalized);
geometry.SetTangent(edges[0], new Vector3(Mathf.Sin(Angle(th2)), 0, Mathf.Cos(Angle(th2))));
geometry.SetTangent(edges[2], new Vector3(-Mathf.Sin(Angle(th)), 0, -Mathf.Cos(Angle(th))));
if (rr == 0)
{
geometry.SetTangent(edges[0].opposite, new Vector3(-Mathf.Sin(Angle(th)), 0, -Mathf.Cos(Angle(th))));
}
}
}
}
for (int th = 0; th < segmentP; th++)
{
int th2 = (th + 1) % n;
Face f = geometry.CreateFace(vertice(segmentR - 1, th), vertice(segmentR - 1, th2), center);
if (tangentRequired)
{
List <Halfedge> edges = f.edges;
geometry.SetTangent(edges[1], -edges[1].vector.normalized);
geometry.SetTangent(edges[2], -edges[2].vector.normalized);
geometry.SetTangent(edges[0], new Vector3(Mathf.Sin(Angle(th2)), 0, Mathf.Cos(Angle(th2))));
}
}
foreach (Face f in geometry.faces)
{
f.surfaceGroup = surfaceGroup;
geometry.SetFaceType(f, faceType);
}
if (normalRequired)
{
if (height == 0)
{
foreach (Halfedge e in geometry.halfedges)
{
geometry.SetNormal(e, Vector3.up);
}
}
else
{
for (int rr = 0; rr < segmentR; rr++)
{
for (int th = 0; th < n; th++)
{
geometry.SetNormal(vertice(rr, th), new Vector3(Mathf.Cos(Angle(th)), radius / height, -Mathf.Sin(Angle(th))).normalized, surfaceGroup);
}
}
foreach (Halfedge e in center.edges)
{
geometry.SetNormal(e, Vector3.Cross(e.vector, e.next.vector).normalized);
}
}
}
if (cutAngle == 0)
{
geometry.DefineBoundaries(vertice(0, 0));
}
else
{
geometry.DefineBoundaries(vertice(0, 0), vertice(0, n - 1), center);
}
if (splitBoundary)
{
geometry.SplitBoundaries();
}
return(geometry);
}
