public static bool GenerateControlMeshFromVertices(ShapePolygon shape2DPolygon,
Matrix4x4 localToWorld,
Vector3 direction,
float height,
Material capMaterial,
TexGen capTexgen,
bool?smooth,
bool singleSurfaceEnds, //Plane buildPlane,
out ControlMesh controlMesh,
out Shape shape)
{
if (shape2DPolygon == null)
{
controlMesh = null;
shape = null;
return(false);
}
var vertices = shape2DPolygon.Vertices;
if (vertices.Length < 3)
{
controlMesh = null;
shape = null;
return(false);
}
if (height == 0.0f)
{
controlMesh = null;
shape = null;
return(false);
}
Vector3 from;
Vector3 to;
if (height > 0)
{
@from = direction * height; // buildPlane.normal * height;
to = MathConstants.zeroVector3;
}
else
{
@from = MathConstants.zeroVector3;
to = direction * height; //buildPlane.normal * height;
}
var count = vertices.Length;
var doubleCount = (count * 2);
var extraPoints = 0;
var extraEdges = 0;
var endsPolygons = 2;
var startEdgeOffset = doubleCount;
if (!singleSurfaceEnds)
{
extraPoints = 2;
extraEdges = (4 * count);
endsPolygons = doubleCount;
startEdgeOffset += extraEdges;
}
var dstPoints = new Vector3 [doubleCount + extraPoints];
var dstEdges = new HalfEdge[(count * 6) + extraEdges];
var dstPolygons = new Polygon [count + endsPolygons];
var center1 = MathConstants.zeroVector3;
var center2 = MathConstants.zeroVector3;
for (int i = 0; i < count; i++)
{
var point1 = vertices[i];
var point2 = vertices[(count + i - 1) % count];
point1 += @from;
point2 += to;
// swap y/z to solve texgen issues
dstPoints[i].x = point1.x;
dstPoints[i].y = point1.y;
dstPoints[i].z = point1.z;
center1 += dstPoints[i];
dstEdges [i].VertexIndex = (short)i;
dstEdges [i].HardEdge = true;
// swap y/z to solve texgen issues
dstPoints[i + count].x = point2.x;
dstPoints[i + count].y = point2.y;
dstPoints[i + count].z = point2.z;
center2 += dstPoints[i + count];
dstEdges [i + count].VertexIndex = (short)(i + count);
dstEdges [i + count].HardEdge = true;
}
if (!singleSurfaceEnds)
{
dstPoints[doubleCount] = center1 / count;
dstPoints[doubleCount + 1] = center2 / count;
int edge_offset = doubleCount;
short polygon_index = (short)count;
// 'top'
for (int i = 0, j = count - 1; i < count; j = i, i++)
{
var jm = (j) % count;
var im = (i) % count;
var edgeOut0 = edge_offset + (jm * 2) + 1;
var edgeIn0 = edge_offset + (im * 2) + 0;
var edgeOut1 = edge_offset + (im * 2) + 1;
dstEdges[edgeIn0].VertexIndex = (short)(doubleCount);
dstEdges[edgeIn0].HardEdge = true;
dstEdges[edgeIn0].TwinIndex = edgeOut1;
dstEdges[edgeOut1].VertexIndex = (short)im;
dstEdges[edgeOut1].HardEdge = true;
dstEdges[edgeOut1].TwinIndex = edgeIn0;
dstEdges[im].PolygonIndex = polygon_index;
dstEdges[edgeIn0].PolygonIndex = polygon_index;
dstEdges[edgeOut0].PolygonIndex = polygon_index;
dstPolygons[polygon_index] = new Polygon(new int[] { im, edgeIn0, edgeOut0 }, polygon_index);
polygon_index++;
}
edge_offset = doubleCount * 2;
// 'bottom'
for (int i = 0, j = count - 1; j >= 0; i = j, j--)
{
var jm = (count + count - j) % count;
var im = (count + count - i) % count;
var edgeOut0 = edge_offset + (jm * 2) + 1;
var edgeIn0 = edge_offset + (im * 2) + 0;
var edgeOut1 = edge_offset + (im * 2) + 1;
dstEdges[edgeIn0].VertexIndex = (short)(doubleCount + 1);
dstEdges[edgeIn0].HardEdge = true;
dstEdges[edgeIn0].TwinIndex = edgeOut1;
dstEdges[edgeOut1].VertexIndex = (short)(im + count);
dstEdges[edgeOut1].HardEdge = true;
dstEdges[edgeOut1].TwinIndex = edgeIn0;
dstEdges[im + count].PolygonIndex = polygon_index;
dstEdges[edgeIn0].PolygonIndex = polygon_index;
dstEdges[edgeOut0].PolygonIndex = polygon_index;
dstPolygons[polygon_index] = new Polygon(new int[] { im + count, edgeIn0, edgeOut0 }, polygon_index);
polygon_index++;
}
}
else
{
var polygon0Edges = new int[count];
var polygon1Edges = new int[count];
for (var i = 0; i < count; i++)
{
dstEdges [i].PolygonIndex = (short)(count + 0);
dstEdges [i + count].PolygonIndex = (short)(count + 1);
polygon0Edges[i] = i;
polygon1Edges[count - (i + 1)] = i + count;
}
dstPolygons[count + 0] = new Polygon(polygon0Edges, count + 0);
dstPolygons[count + 1] = new Polygon(polygon1Edges, count + 1);
}
for (int v0 = count - 1, v1 = 0; v1 < count; v0 = v1, v1++)
{
var polygonIndex = (short)(v1);
var nextOffset = startEdgeOffset + (((v1 + 1) % count) * 4);
var currOffset = startEdgeOffset + (((v1)) * 4);
var prevOffset = startEdgeOffset + (((v1 + count - 1) % count) * 4);
var nextTwin = nextOffset + 1;
var prevTwin = prevOffset + 3;
dstEdges[v1].TwinIndex = currOffset + 0;
dstEdges[v1 + count].TwinIndex = currOffset + 2;
dstEdges[currOffset + 0].PolygonIndex = polygonIndex;
dstEdges[currOffset + 1].PolygonIndex = polygonIndex;
dstEdges[currOffset + 2].PolygonIndex = polygonIndex;
dstEdges[currOffset + 3].PolygonIndex = polygonIndex;
dstEdges[currOffset + 0].TwinIndex = (v1);
dstEdges[currOffset + 1].TwinIndex = prevTwin;
dstEdges[currOffset + 2].TwinIndex = (v1 + count);
dstEdges[currOffset + 3].TwinIndex = nextTwin;
dstEdges[currOffset + 0].VertexIndex = (short)(v0);
dstEdges[currOffset + 1].VertexIndex = (short)(v1 + count);
dstEdges[currOffset + 2].VertexIndex = (short)(((v1 + 1) % count) + count);
dstEdges[currOffset + 3].VertexIndex = (short)(v1);
dstEdges[currOffset + 0].HardEdge = true;
dstEdges[currOffset + 1].HardEdge = true;
dstEdges[currOffset + 2].HardEdge = true;
dstEdges[currOffset + 3].HardEdge = true;
dstPolygons[polygonIndex] = new Polygon(new [] { currOffset + 0,
currOffset + 1,
currOffset + 2,
currOffset + 3 }, polygonIndex);
}
for (int i = 0; i < dstPoints.Length; i++)
{
dstPoints[i] = localToWorld.MultiplyPoint(dstPoints[i]);
}
controlMesh = new ControlMesh
{
Vertices = dstPoints,
Edges = dstEdges,
Polygons = dstPolygons
};
controlMesh.SetDirty();
shape = new Shape
{
Materials = new Material[dstPolygons.Length],
Surfaces = new Surface[dstPolygons.Length],
TexGenFlags = new TexGenFlags[dstPolygons.Length],
TexGens = new TexGen[dstPolygons.Length]
};
var smoothinggroup = (smooth.HasValue && smooth.Value) ? SurfaceUtility.FindUnusedSmoothingGroupIndex() : 0;
var containedMaterialCount = 0;
if (shape2DPolygon.EdgeMaterials != null &&
shape2DPolygon.EdgeTexgens != null /* &&
* shape2DPolygon.edgeTexgenFlags != null*/)
{
containedMaterialCount = Mathf.Min(shape2DPolygon.EdgeMaterials.Length,
shape2DPolygon.EdgeTexgens.Length /*,
* shape2DPolygon.edgeTexgenFlags.Length*/);
}
if (!capMaterial)
{
capMaterial = CSGSettings.DefaultMaterial;
capTexgen = new TexGen(-1);
}
for (var i = 0; i < dstPolygons.Length; i++)
{
if (i < containedMaterialCount)
{
//shape.TexGenFlags[i] = shape2DPolygon.edgeTexgenFlags[i];
shape.Materials [i] = shape2DPolygon.EdgeMaterials[i];
shape.TexGens [i] = shape2DPolygon.EdgeTexgens[i];
shape.Surfaces [i].TexGenIndex = i;
shape.TexGens[i].MaterialIndex = -1;
}
else
{
shape.Materials[i] = capMaterial;
shape.TexGens[i] = capTexgen;
//shape.TexGenFlags[i] = TexGenFlags.None;
shape.Surfaces[i].TexGenIndex = i;
shape.TexGens[i].MaterialIndex = -1;
}
if (smooth.HasValue)
{
if (i < count)
{
shape.TexGens[i].SmoothingGroup = smoothinggroup;
}
else
{
shape.TexGens[i].SmoothingGroup = 0;
}
}
}
for (var s = 0; s < dstPolygons.Length; s++)
{
var normal = shape.Surfaces[s].Plane.normal;
shape.Surfaces[s].Plane = GeometryUtility.CalcPolygonPlane(controlMesh, (short)s);
Vector3 tangent, binormal;
GeometryUtility.CalculateTangents(normal, out tangent, out binormal);
//var tangent = Vector3.Cross(GeometryUtility.CalculateTangent(normal), normal).normalized;
//var binormal = Vector3.Cross(normal, tangent);
shape.Surfaces[s].Tangent = tangent;
shape.Surfaces[s].BiNormal = binormal;
shape.Surfaces[s].TexGenIndex = s;
}
controlMesh.IsValid = ControlMeshUtility.Validate(controlMesh, shape);
if (controlMesh.IsValid)
{
return(true);
}
controlMesh = null;
shape = null;
return(false);
}
