/// <summary>
/// Creates a cube <see cref="RealtimeCSG.Foundation.BrushMesh"/> with bounds defined by <paramref name="min"/> and <paramref name="max"/>, its <paramref name="layers"/> and optional <paramref name="surfaceFlags"/>
/// </summary>
/// <remarks><note>These methods are a work in progress and may change somewhat over time</note></remarks>
/// <param name="min">The corner of the cube with the smallest x,y,z values</param>
/// <param name="max">The corner of the cube with the largest x,y,z values</param>
/// <param name="layers">The <see cref="RealtimeCSG.Foundation.SurfaceLayers"/> that define how the surfaces of this cube are rendered or if they need to be part of a collider etc.</param>
/// <param name="surfaceFlags">Optional flags that modify surface behavior.</param>
/// <returns>A <see cref="RealtimeCSG.Foundation.BrushMesh"/> on success, null on failure</returns>
public static BrushMesh CreateCube(UnityEngine.Vector3 min, UnityEngine.Vector3 max, SurfaceLayers layers, SurfaceFlags surfaceFlags = SurfaceFlags.None)
{
if (min.x == max.x || min.y == max.y || min.z == max.z)
{
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;
}
var surfaceMatrices = new[]
{
// left/right
new UVMatrix {
U = new Vector4(-1, 0, 0, -min.x), V = new Vector4(0, 1, 0, min.y)
},
new UVMatrix {
U = new Vector4(1, 0, 0, min.x), V = new Vector4(0, 1, 0, min.y)
},
// front/back
new UVMatrix {
U = new Vector4(0, 0, 1, min.z), V = new Vector4(0, 1, 0, min.y)
},
new UVMatrix {
U = new Vector4(0, 0, -1, -min.z), V = new Vector4(0, 1, 0, min.y)
},
// top/down
new UVMatrix {
U = new Vector4(-1, 0, 0, -min.x), V = new Vector4(0, 0, -1, -min.z)
},
new UVMatrix {
U = new Vector4(1, 0, 0, min.x), V = new Vector4(0, 0, -1, -min.z)
},
};
return(new BrushMesh
{
polygons = new[]
{
// left/right
new BrushMesh.Polygon {
polygonID = 0, firstEdge = 0, edgeCount = 4, surface = new SurfaceDescription {
UV0 = surfaceMatrices[0], surfaceFlags = surfaceFlags, smoothingGroup = 0
}, layers = layers
},
new BrushMesh.Polygon {
polygonID = 1, firstEdge = 4, edgeCount = 4, surface = new SurfaceDescription {
UV0 = surfaceMatrices[1], surfaceFlags = surfaceFlags, smoothingGroup = 0
}, layers = layers
},
// front/back
new BrushMesh.Polygon {
polygonID = 2, firstEdge = 8, edgeCount = 4, surface = new SurfaceDescription {
UV0 = surfaceMatrices[2], surfaceFlags = surfaceFlags, smoothingGroup = 0
}, layers = layers
},
new BrushMesh.Polygon {
polygonID = 3, firstEdge = 12, edgeCount = 4, surface = new SurfaceDescription {
UV0 = surfaceMatrices[3], surfaceFlags = surfaceFlags, smoothingGroup = 0
}, layers = layers
},
// top/down
new BrushMesh.Polygon {
polygonID = 4, firstEdge = 16, edgeCount = 4, surface = new SurfaceDescription {
UV0 = surfaceMatrices[4], surfaceFlags = surfaceFlags, smoothingGroup = 0
}, layers = layers
},
new BrushMesh.Polygon {
polygonID = 5, firstEdge = 20, edgeCount = 4, surface = new SurfaceDescription {
UV0 = surfaceMatrices[5], surfaceFlags = surfaceFlags, smoothingGroup = 0
}, layers = layers
}
},
halfEdges = new[]
{
// polygon 0
new BrushMesh.HalfEdge {
twinIndex = 17, vertexIndex = 0
}, // 0
new BrushMesh.HalfEdge {
twinIndex = 8, vertexIndex = 1
}, // 1
new BrushMesh.HalfEdge {
twinIndex = 20, vertexIndex = 2
}, // 2
new BrushMesh.HalfEdge {
twinIndex = 13, vertexIndex = 3
}, // 3
// polygon 1
new BrushMesh.HalfEdge {
twinIndex = 10, vertexIndex = 4
}, // 4
new BrushMesh.HalfEdge {
twinIndex = 19, vertexIndex = 5
}, // 5
new BrushMesh.HalfEdge {
twinIndex = 15, vertexIndex = 6
}, // 6
new BrushMesh.HalfEdge {
twinIndex = 22, vertexIndex = 7
}, // 7
// polygon 2
new BrushMesh.HalfEdge {
twinIndex = 1, vertexIndex = 0
}, // 8
new BrushMesh.HalfEdge {
twinIndex = 16, vertexIndex = 4
}, // 9
new BrushMesh.HalfEdge {
twinIndex = 4, vertexIndex = 7
}, // 10
new BrushMesh.HalfEdge {
twinIndex = 21, vertexIndex = 1
}, // 11
// polygon 3
new BrushMesh.HalfEdge {
twinIndex = 18, vertexIndex = 3
}, // 16
new BrushMesh.HalfEdge {
twinIndex = 3, vertexIndex = 2
}, // 17
new BrushMesh.HalfEdge {
twinIndex = 23, vertexIndex = 6
}, // 18
new BrushMesh.HalfEdge {
twinIndex = 6, vertexIndex = 5
}, // 19
// polygon 4
new BrushMesh.HalfEdge {
twinIndex = 9, vertexIndex = 0
}, // 20
new BrushMesh.HalfEdge {
twinIndex = 0, vertexIndex = 3
}, // 21
new BrushMesh.HalfEdge {
twinIndex = 12, vertexIndex = 5
}, // 22
new BrushMesh.HalfEdge {
twinIndex = 5, vertexIndex = 4
}, // 23
// polygon 5
new BrushMesh.HalfEdge {
twinIndex = 2, vertexIndex = 1
}, // 12
new BrushMesh.HalfEdge {
twinIndex = 11, vertexIndex = 7
}, // 13
new BrushMesh.HalfEdge {
twinIndex = 7, vertexIndex = 6
}, // 14
new BrushMesh.HalfEdge {
twinIndex = 14, vertexIndex = 2
} // 15
},
vertices = new[]
{
new Vector3(min.x, min.y, min.z), // 0
new Vector3(min.x, max.y, min.z), // 1
new Vector3(max.x, max.y, min.z), // 2
new Vector3(max.x, min.y, min.z), // 3
new Vector3(min.x, min.y, max.z), // 4
new Vector3(max.x, min.y, max.z), // 5
new Vector3(max.x, max.y, max.z), // 6
new Vector3(min.x, max.y, max.z) // 7
}
});
}
/// <summary>
/// Creates a cube <see cref="RealtimeCSG.Foundation.BrushMesh"/> with <paramref name="size"/> and <paramref name="layers"/> and optional <paramref name="surfaceFlags"/>
/// </summary>
/// <remarks><note>These methods are a work in progress and may change somewhat over time</note></remarks>
/// <param name="size">The size of the cube</param>
/// <param name="layers">The <see cref="RealtimeCSG.Foundation.SurfaceLayers"/> that define how the surfaces of this cube are rendered or if they need to be part of a collider etc.</param>
/// <param name="surfaceFlags">Optional flags that modify surface behavior.</param>
/// <returns>A <see cref="RealtimeCSG.Foundation.BrushMesh"/> on success, null on failure</returns>
public static BrushMesh CreateCube(UnityEngine.Vector3 size, SurfaceLayers layers, SurfaceFlags surfaceFlags = SurfaceFlags.None)
{
var halfSize = size * 0.5f;
return(CreateCube(-halfSize, halfSize, layers, surfaceFlags));
}