static BrushMesh.Polygon[] CreateBoxPolygons(SurfaceLayers layers, SurfaceFlags surfaceFlags)
{
return(new[]
{
// left/right
new BrushMesh.Polygon {
surfaceID = 0, firstEdge = 0, edgeCount = 4, description = new SurfaceDescription {
UV0 = UVMatrix.centered, surfaceFlags = surfaceFlags, smoothingGroup = 0
}, layers = layers
},
new BrushMesh.Polygon {
surfaceID = 1, firstEdge = 4, edgeCount = 4, description = new SurfaceDescription {
UV0 = UVMatrix.centered, surfaceFlags = surfaceFlags, smoothingGroup = 0
}, layers = layers
},
// front/back
new BrushMesh.Polygon {
surfaceID = 2, firstEdge = 8, edgeCount = 4, description = new SurfaceDescription {
UV0 = UVMatrix.centered, surfaceFlags = surfaceFlags, smoothingGroup = 0
}, layers = layers
},
new BrushMesh.Polygon {
surfaceID = 3, firstEdge = 12, edgeCount = 4, description = new SurfaceDescription {
UV0 = UVMatrix.centered, surfaceFlags = surfaceFlags, smoothingGroup = 0
}, layers = layers
},
// top/down
new BrushMesh.Polygon {
surfaceID = 4, firstEdge = 16, edgeCount = 4, description = new SurfaceDescription {
UV0 = UVMatrix.centered, surfaceFlags = surfaceFlags, smoothingGroup = 0
}, layers = layers
},
new BrushMesh.Polygon {
surfaceID = 5, firstEdge = 20, edgeCount = 4, description = new SurfaceDescription {
UV0 = UVMatrix.centered, surfaceFlags = surfaceFlags, smoothingGroup = 0
}, layers = layers
}
});
}
public static BrushMesh CreateBox(UnityEngine.Vector3 min, UnityEngine.Vector3 max, SurfaceLayers layers, SurfaceFlags surfaceFlags = SurfaceFlags.None)
{
if (!BoundsExtensions.IsValid(min, max))
{
return(null);
}
if (min.x > max.x)
{
float x = min.x; min.x = max.x; max.x = x;
}
if (min.y > max.y)
{
float y = min.y; min.y = max.y; max.y = y;
}
if (min.z > max.z)
{
float z = min.z; min.z = max.z; max.z = z;
}
return(new BrushMesh
{
polygons = CreateBoxPolygons(layers, surfaceFlags),
halfEdges = boxHalfEdges.ToArray(),
vertices = CreateBoxVertices(min, max)
});
}
/// <summary>
/// Creates a box <see cref="Chisel.Core.BrushMesh"/> with <paramref name="size"/> and optional <paramref name="material"/>
/// </summary>
/// <param name="size">The size of the box</param>
/// <param name="material">The [UnityEngine.Material](https://docs.unity3d.com/ScriptReference/Material.html) that will be set to all surfaces of the box (optional)</param>
/// <returns>A <see cref="Chisel.Core.BrushMesh"/> on success, null on failure</returns>
public static BrushMesh CreateBox(UnityEngine.Vector3 size, SurfaceLayers layers, SurfaceFlags surfaceFlags = SurfaceFlags.None)
{
var halfSize = size * 0.5f;
return(CreateBox(-halfSize, halfSize, layers, surfaceFlags));
}
public static BrushMesh CreateSphere(Vector3 diameterXYZ, float offsetY, bool generateFromCenter, int horzSegments, int vertSegments, SurfaceLayers layers = default, SurfaceFlags surfaceFlags = SurfaceFlags.None)
{
var lastVertSegment = vertSegments - 1;
var triangleCount = horzSegments + horzSegments; // top & bottom
var quadCount = horzSegments * (vertSegments - 2);
int polygonCount = triangleCount + quadCount;
int halfEdgeCount = (triangleCount * 3) + (quadCount * 4);
Vector3[] vertices = null;
CreateSphereVertices(diameterXYZ, offsetY, generateFromCenter, horzSegments, vertSegments, ref vertices);
var polygons = new Polygon[polygonCount];
var halfEdges = new HalfEdge[halfEdgeCount];
var edgeIndex = 0;
var polygonIndex = 0;
var startVertex = 2;
for (int v = 0; v < vertSegments; v++)
{
var startEdge = edgeIndex;
for (int h = 0, p = horzSegments - 1; h < horzSegments; p = h, h++)
{
var n = (h + 1) % horzSegments;
int polygonEdgeCount;
if (v == 0) // top
{
// 0
// *
// ^ \
// p1 /0 1\ n0
// / 2 v
// *<------*
// 2 t 1
polygonEdgeCount = 3;
var p1 = (p * 3) + 1;
var n0 = (n * 3) + 0;
var t = ((vertSegments == 2) ? (startEdge + (horzSegments * 3) + (h * 3) + 1) : (startEdge + (horzSegments * 3) + (h * 4) + 1));
halfEdges[edgeIndex + 0] = new HalfEdge {
twinIndex = p1, vertexIndex = 0
};
halfEdges[edgeIndex + 1] = new HalfEdge {
twinIndex = n0, vertexIndex = startVertex + (horzSegments - 1) - h
};
halfEdges[edgeIndex + 2] = new HalfEdge {
twinIndex = t, vertexIndex = startVertex + (horzSegments - 1) - p
};
}
else
if (v == lastVertSegment)
{
// 0 t 1
// *------>*
// ^ 1 /
// p1 \0 2/ n0
// \ v
// *
// 2
polygonEdgeCount = 3;
var p2 = startEdge + (p * 3) + 2;
var n0 = startEdge + (n * 3) + 0;
var t = ((vertSegments == 2) ? (startEdge - (horzSegments * 3) + (h * 3) + 2) : (startEdge - (horzSegments * 4) + (h * 4) + 3));
halfEdges[edgeIndex + 0] = new HalfEdge {
twinIndex = p2, vertexIndex = startVertex + (horzSegments - 1) - p
};
halfEdges[edgeIndex + 1] = new HalfEdge {
twinIndex = t, vertexIndex = startVertex + (horzSegments - 1) - h
};
halfEdges[edgeIndex + 2] = new HalfEdge {
twinIndex = n0, vertexIndex = 1
};
}
else
{
// 0 t3 1
// *------>*
// ^ 1 |
// p1 |0 2| n0
// | 3 v
// *<------*
// 3 t1 2
polygonEdgeCount = 4;
var p1 = startEdge + (p * 4) + 2;
var n0 = startEdge + (n * 4) + 0;
var t3 = ((v == 1) ? (startEdge - (horzSegments * 3) + (h * 3) + 2) : (startEdge - (horzSegments * 4) + (h * 4) + 3));
var t1 = ((v == lastVertSegment - 1) ? (startEdge + (horzSegments * 4) + (h * 3) + 1) : (startEdge + (horzSegments * 4) + (h * 4) + 1));
halfEdges[edgeIndex + 0] = new HalfEdge {
twinIndex = p1, vertexIndex = startVertex + (horzSegments - 1) - p
};
halfEdges[edgeIndex + 1] = new HalfEdge {
twinIndex = t3, vertexIndex = startVertex + (horzSegments - 1) - h
};
halfEdges[edgeIndex + 2] = new HalfEdge {
twinIndex = n0, vertexIndex = startVertex + (horzSegments - 1) - h + horzSegments
};
halfEdges[edgeIndex + 3] = new HalfEdge {
twinIndex = t1, vertexIndex = startVertex + (horzSegments - 1) - p + horzSegments
};
}
polygons[polygonIndex] = new Polygon
{
surfaceID = polygonIndex,
firstEdge = edgeIndex,
edgeCount = polygonEdgeCount,
description = new SurfaceDescription {
UV0 = UVMatrix.centered, surfaceFlags = surfaceFlags, smoothingGroup = 0
},
layers = layers
};
edgeIndex += polygonEdgeCount;
polygonIndex++;
}
if (v > 0)
{
startVertex += horzSegments;
}
}
return(new BrushMesh
{
polygons = polygons,
halfEdges = halfEdges,
vertices = vertices
});
}
