Class: Sketchup::Face

Inherits:
Drawingelement show all

Overview

Faces in SketchUp are flat, 2-sided polygons with 3 or more sides.

Version:

  • SketchUp 6.0

Constant Summary #

Sketchup::Face::PointUnknown
Sketchup::Face::PointInside
Sketchup::Face::PointOnVertex
Sketchup::Face::PointOnEdge
Sketchup::Face::PointOnFace
Sketchup::Face::PointOutside
Sketchup::Face::PointNotOnPlane

Instance Method Summary # collapse

Methods inherited from Drawingelement

#bounds, #casts_shadows=, #casts_shadows?, #erase!, #hidden=, #hidden?, #layer, #layer=, #receives_shadows=, #receives_shadows?, #visible=, #visible?

Methods inherited from Entity

#add_observer, #attribute_dictionaries, #attribute_dictionary, #delete_attribute, #deleted?, #entityID, #get_attribute, #inspect, #model, #parent, #persistent_id, #remove_observer, #set_attribute, #to_s, #typename, #valid?

Instance Method Details

#all_connectedArray<Sketchup::Entity>

The all_connected method retrieves all of the entities connected to a face.

Examples:

depth = 100
width = 100
model = Sketchup.active_model
entities = model.active_entities
pts = []
pts[0] = [0, 0, 0]
pts[1] = [width, 0, 0]
pts[2] = [width, depth, 0]
pts[3] = [0, depth, 0]

# Add the face to the entities in the model
face = entities.add_face(pts)
connected = face.all_connected

Returns:

Version:

  • SketchUp 6.0

#areaFloat #area(transform) ⇒ Float

The area method is used to retrieve the area of a face in current units.

You can pass in an optional Transformation (or an array that can represent a transformation), to correct for a parent group's transformation. For example, if a face is inside of a group that is scaled to 200%, the area method will return the unscaled area of the face. So by passing a 200% transformation object to this method, you can account for that to get the “visual” area of the face.

Examples:

depth = 100
width = 100
model = Sketchup.active_model
entities = model.active_entities
pts = []
pts[0] = [0, 0, 0]
pts[1] = [width, 0, 0]
pts[2] = [width, depth, 0]
pts[3] = [0, depth, 0]
# Add the face to the entities in the model
face = entities.add_face(pts)
area = face.area

Overloads:

  • #areaFloat

    Returns the area of the face in current units (if successful)

    Returns:

    • (Float)

      the area of the face in current units (if successful)

  • #area(transform) ⇒ Float

    Returns the area of the face in current units (if successful)

    Parameters:

    • transform (Geom::Transformation)

      A Transformation object or array that can be interpreted as a Transformation object.

    Returns:

    • (Float)

      the area of the face in current units (if successful)

Version:

  • SketchUp 6.0

#back_materialSketchup::Material?

The back_material method is used to retrieve the material assigned to the back side of the face.

Examples:

depth = 100
width = 100
model = Sketchup.active_model
entities = model.active_entities
pts = []
pts[0] = [0, 0, 0]
pts[1] = [width, 0, 0]
pts[2] = [width, depth, 0]
pts[3] = [0, depth, 0]

# Add the face to the entities in the model
face = entities.add_face(pts)

# Add a material to the back face, then check to see that it was added
face.back_material = "red"
material = face.back_material

Returns:

  • (Sketchup::Material, nil)

    a Material object representing the material on the back of the face (if successful)

Version:

  • SketchUp 6.0

#back_material=(material) ⇒ Sketchup::Material

The back_material= method is used to set the material assigned to the back side of the face.

Examples:

depth = 100
width = 100
model = Sketchup.active_model
entities = model.active_entities
pts = []
pts[0] = [0, 0, 0]
pts[1] = [width, 0, 0]
pts[2] = [width, depth, 0]
pts[3] = [0, depth, 0]
# Add the face to the entities in the model
face = entities.add_face(pts)
status = face.back_material = "red"

Parameters:

Returns:

  • (Sketchup::Material)

    the name of the valid material or the new Material object (if successful)

Version:

  • SketchUp 6.0

#classify_point(point) ⇒ Integer

The classify_point method is used to determine if a given Point3d is on the referenced Face.

It is important that return value comparisons be made against the symbolic constants (i.e. PointUnknown, PointInside, PointOnVertex, etc.) rather than the absolute integer values as these values may change from one release to the next.

Examples:

model = Sketchup.active_model
entities = model.active_entities
pts = []
pts[0] = [0, 0, 0]
pts[1] = [9, 0, 0]
pts[2] = [9, 9, 0]
pts[3] = [0, 9, 0]

# Add the face to the entities in the model
face = entities.add_face(pts)

# Check a point that should be outside the face.
pt = Geom::Point3d.new(50, 50, 0)
result = face.classify_point(pt)
if result == Sketchup::Face::PointOutside
  puts "#{pt.to_s} is outside the face"
end

# Check a point that should be outside inside the face.
pt = Geom::Point3d.new(1, 1, 0)
result = face.classify_point(pt)
if result == Sketchup::Face::PointInside
  puts "#{pt.to_s} is inside the face"
end

# Check a point that should be on the vertex of the face.
pt = Geom::Point3d.new(0, 0, 0)
result = face.classify_point(pt)
if result == Sketchup::Face::PointOnVertex
  puts "#{pt.to_s} is on a vertex"
end

# Check a point that should be on the edge of the face.
pt = Geom::Point3d.new(0, 1, 0)
result = face.classify_point(pt)
if result == Sketchup::Face::PointOnEdge
  puts "#{pt.to_s} is on an edge of the face"
end

# Check a point that should be off the plane of the face.
pt = Geom::Point3d.new(1, 1, 10)
result = face.classify_point(pt)
if result == Sketchup::Face::PointNotOnPlane
  puts "#{pt.to_s} is not on the same plane as the face"
end

Parameters:

Returns:

  • (Integer)

    an integer describing where a Point3d is in relation to the referenced Face.

Version:

  • SketchUp 6.0

#edgesArray<Sketchup::Edge>

The edges method is used to get an array of edges that bound the face.

Examples:

depth = 100
width = 100
model = Sketchup.active_model
entities = model.active_entities
pts = []
pts[0] = [0, 0, 0]
pts[1] = [width, 0, 0]
pts[2] = [width, depth, 0]
pts[3] = [0, depth, 0]
# Add the face to the entities in the model
face = entities.add_face(pts)
edges = face.edges

Returns:

Version:

  • SketchUp 6.0

#followme(edges) ⇒ Boolean #followme(edge) ⇒ Boolean

The #followme method is used to create a shape by making the face follow along an array of edges.

Examples:

model = Sketchup.active_model
entities = model.active_entities

depth = 100
width = 100

# Add the face to the entities in the model
points = [
  Geom::Point3d.new(0, 0, 0),
  Geom::Point3d.new(width, 0, 0),
  Geom::Point3d.new(width, depth, 0),
  Geom::Point3d.new(0, depth, 0)
]
face = entities.add_face(points)

# Add the line which we will "follow" to the entities in the model
point1 = Geom::Point3d.new(0, 0, 0)
point2 = Geom::Point3d.new(0, 0, 100)
edge = entities.add_line(point1, point2)
face.followme(edge)

Overloads:

  • #followme(edges) ⇒ Boolean

    Parameters:

    Returns:

    • (Boolean)
  • #followme(edge) ⇒ Boolean

    Parameters:

    Returns:

    • (Boolean)

Version:

  • SketchUp 6.0

#get_glued_instancesArray<Sketchup::ComponentInstance, Sketchup::Group, Sketchup::Image>

The get_glued_instances method returns an Array any ComponentInstances that are glued to the face.

Examples:

# Create a series of points that define a new face.
model = Sketchup.active_model
entities = model.active_entities
pts = []
pts[0] = [0, 0, 0]
pts[1] = [9, 0, 0]
pts[2] = [9, 9, 0]
pts[3] = [0, 9, 0]

# Add the face to the entities in the model
face = entities.add_face(pts)
glued_array = face.get_glued_instances

Returns:

Version:

  • SketchUp 7.0 M1

#get_texture_projection(frontside) ⇒ Geom::Vector3d

The get_texture_projection method will return a vector representing the projection for either the front or back side of the face.

Examples:

model = Sketchup.active_model
entities = model.active_entities
materials = model.materials

# Create a face and add it to the model entities
pts = []
pts[0] = [0, 0, 1]
pts[1] = [10, 0, 1]
pts[2] = [10, 10, 1]
face = entities.add_face(pts)

# Export an image to use as a texture
path = Sketchup.temp_dir
full_name = File.join(path, "temp_image.jpg")
model.active_view.write_image(full_name, 500, 500, false, 0.0)

# Create a material and assign the texture to it
material = materials.add("Test Material")
material.texture = full_name

# Assign the new material to our face we created
face.material = material

# Set the projection of the applied material
face.set_texture_projection(face.normal, true)

# Get the projection of the applied material
vector = face.get_texture_projection(true)

Parameters:

  • frontside (Boolean)

    true for front side, false for back side.

Returns:

Version:

  • SketchUp 2014

#get_UVHelper(front, back, texturewriter) ⇒ Sketchup::UVHelper

The get_UVHelper object is used to retrieve a UVHelper object for use in texture manipulation on a face.

Examples:

model = Sketchup.active_model
entities = model.active_entities
pts = []
pts[0] = [0, 0, 0]
pts[1] = [9, 0, 0]
pts[2] = [9, 9, 0]
pts[3] = [0, 9, 0]

# Add the face to the entities in the model
face = entities.add_face(pts)
tw = Sketchup.create_texture_writer
uvHelp = face.get_UVHelper(true, true, tw)

Parameters:

  • front (Boolean)

    True if you want the texture coordinates for the front face, false if not. Defaults to true.

  • back (Boolean)

    True if you want the texture coordinates for the back face, false if not. Defaults to true.

  • texturewriter (Sketchup::TextureWriter)

    An optional TextureWriter object.

Returns:

Version:

  • SketchUp 6.0

#loopsArray<Sketchup::Loop>

The loops method is used to get an array of all of the loops that bound the face.

Examples:

depth = 100
width = 100
model = Sketchup.active_model
entities = model.active_entities
pts = []
pts[0] = [0, 0, 0]
pts[1] = [width, 0, 0]
pts[2] = [width, depth, 0]
pts[3] = [0, depth, 0]

# Add the face to the entities in the model
face = entities.add_face(pts)
loops = face.loops

Returns:

Version:

  • SketchUp 6.0

#materialSketchup::Material?

The material method is used to retrieve the material assigned to the front of the face. (This method is inherited from the Drawingelement parent class.)

Examples:

depth = 100
width = 100
model = Sketchup.active_model
entities = model.active_entities
pts = []
pts[0] = [0, 0, 0]
pts[1] = [width, 0, 0]
pts[2] = [width, depth, 0]
pts[3] = [0, depth, 0]

# Add the face to the entities in the model
face = entities.add_face(pts)

# Add a material to the face, then check to see that it was added
face.material = "red"
material = face.material

Returns:

  • (Sketchup::Material, nil)

    a Material object representing the material on the front of the face (if successful)

Version:

  • SketchUp 6.0

#material=(material) ⇒ Sketchup::Material

The material= method is used to set the material assigned to the front side of the face. (This method is inherited from the Drawingelement parent class.)

Examples:

depth = 100
width = 100
model = Sketchup.active_model
entities = model.active_entities
pts = []
pts[0] = [0, 0, 0]
pts[1] = [width, 0, 0]
pts[2] = [width, depth, 0]
pts[3] = [0, depth, 0]
# Add the face to the entities in the model
face = entities.add_face(pts)
status = face.material = "red"

Parameters:

Returns:

  • (Sketchup::Material)

    the name of the valid material or the new Material object (if successful)

Version:

  • SketchUp 6.0

#mesh(flags = 0) ⇒ Geom::PolygonMesh

The mesh method creates a polygon mesh that represents the face. See the Geom::PolygonMesh class for more information.

Valid flags are:

  • 0: Include PolygonMeshPoints,

  • 1: Include PolygonMeshUVQFront,

  • 2: Include PolygonMeshUVQBack,

  • 4: Include PolygonMeshNormals.

Use bitwise OR to combine flags. A value of 7 will include all flags, for example.

Examples:

depth = 100
width = 100
model = Sketchup.active_model
entities = model.active_entities
pts = []
pts[0] = [0, 0, 0]
pts[1] = [width, 0, 0]
pts[2] = [width, depth, 0]
pts[3] = [0, depth, 0]

# Add the face to the entities in the model
face = entities.add_face(pts)

kPoints = 0
kUVQFront = 1
kUVQBack = 2
kNormals = 4
flags = kPoints | kUVQFront | kUVQBack | kNormals # equals to 7
mesh = face.mesh(flags)

Parameters:

  • flags (Integer) (defaults to: 0)

    One or more flags used to generate a mesh.

Returns:

Version:

  • SketchUp 6.0

#normalGeom::Vector3d

The normal method is used to retrieve the 3D vector normal to the face in the front direction.

Examples:

depth = 100
width = 100
model = Sketchup.active_model
entities = model.active_entities
pts = []
pts[0] = [0, 0, 0]
pts[1] = [width, 0, 0]
pts[2] = [width, depth, 0]
pts[3] = [0, depth, 0]

# Add the face to the entities in the model
face = entities.add_face(pts)
normal = face.normal

Returns:

Version:

  • SketchUp 6.0

#outer_loopSketchup::Loop

This method is used to retrieve the outer loop that bounds the face.

Examples:

# Create a series of points that define a new face.
model = Sketchup.active_model
entities = model.active_entities
pts = []
pts[0] = [0, 0, 0]
pts[1] = [9, 0, 0]
pts[2] = [9, 9, 0]
pts[3] = [0, 9, 0]

# Add the face to the entities in the model
face = entities.add_face(pts)
loop = face.outer_loop

Returns:

  • (Sketchup::Loop)

    a Loop object representing the outer loop (if successful)

Version:

  • SketchUp 6.0

#planeArray(Float, Float, Float, Float)

The plane method is used to retrieve the plane of the face. See the Array class for information on how planes are stored.

Examples:

depth = 100
width = 100
model = Sketchup.active_model
entities = model.active_entities
pts = []
pts[0] = [0, 0, 0]
pts[1] = [width, 0, 0]
pts[2] = [width, depth, 0]
pts[3] = [0, depth, 0]

# Add the face to the entities in the model
face = entities.add_face(pts)
plane = face.plane

Returns:

  • (Array(Float, Float, Float, Float))

    a plane that contains the face (if successful)

Version:

  • SketchUp 6.0

#position_material(material, pt_array, o_front) ⇒ Sketchup::Face, false

The position_material method is used to position a material on a face.

The pt_array must contain 2, 4, 6 or 8 points. The points are used in pairs to tell where a point in the texture image is positioned on the Face. The first point in each pair is a 3D point in the model. It should be a point on the Face. The second point in each pair of points is a 2D point that gives the (u,v) coordinates of a point in the image to match up with the 3D point.

Examples:

model = Sketchup.active_model
entities = model.active_entities

# Create a face and add it to the model entities
pts = []
pts[0] = [0, 0, 1]
pts[1] = [9, 0, 1]
pts[2] = [9, 9, 1]
pts[3] = [0, 9, 1]
face = entities.add_face(pts)

# Export an image to use as a texture
path = Sketchup.temp_dir
full_name = File.join(path, "temp_image.jpg")
model.active_view.write_image(full_name, 500, 500, false, 0.0)

# Create a material and assign the texture to it
material = model.materials.add("Test Material")
material.texture = full_name

# Assign the new material to our face we created
face.material = material

pt_array = []
pt_array[0] = Geom::Point3d.new(3,0,0)
pt_array[1] = Geom::Point3d.new(0,0,0)
on_front = true
face.position_material(material, pt_array, on_front)

Parameters:

  • material (Sketchup::Material)

    a Material object.

  • pt_array (Array<Geom::Point3d>)

    An array of Point3d objects used to position the material.

  • o_front (Boolean)

    true to position the texture on the front of the Face or false to position it on the back of the Face.

Returns:

  • (Sketchup::Face, false)

    the face upon success, false upon failure.

Version:

  • SketchUp 6.0

#pushpull(distance, copy = false) ⇒ nil

The pushpull method is used to perform a push/pull on a face.

The distance is measured in the direction that the face normal is pointing.

Examples:

depth = 100
width = 100
model = Sketchup.active_model
entities = model.active_entities
pts = []
pts[0] = [0, 0, 0]
pts[1] = [width, 0, 0]
pts[2] = [width, depth, 0]
pts[3] = [0, depth, 0]
# Add the face to the entities in the model
face = entities.add_face(pts)
status = face.pushpull(100, true)

Parameters:

  • distance (Numeric)

    The distance, in current units, to push/pull the face.

  • copy (Boolean) (defaults to: false)

    Create a new push/pull starting face if true (equivalent of pressing CTRL while in SketchUp), do not create a push/pull starting face if false.

Returns:

  • (nil)

Version:

  • SketchUp 6.0

#reverse!Sketchup::Face, false

The reverse! method is used to reverse the face's orientation, meaning the front becomes the back.

Examples:

depth = 100
width = 100
model = Sketchup.active_model
entities = model.active_entities
pts = []
pts[0] = [0, 0, 0]
pts[1] = [width, 0, 0]
pts[2] = [width, depth, 0]
pts[3] = [0, depth, 0]
# Add the face to the entities in the model
face = entities.add_face(pts)
status = face.reverse!

Returns:

  • (Sketchup::Face, false)

    the reversed Face object if successful, false if unsuccessful

Version:

  • SketchUp 6.0

#set_texture_projection(vector, frontside) ⇒ Boolean

Deprecated.

This function never worked right. It's not possible to control the position and orientation of the texture.

The set_texture_projection method is used to set the texture projection direction.

Examples:

model = Sketchup.active_model
entities = model.active_entities
materials = model.materials

# Create a face and add it to the model entities
pts = []
pts[0] = [0, 0, 1]
pts[1] = [10, 0, 1]
pts[2] = [10, 10, 1]
face = entities.add_face(pts)

# Export an image to use as a texture
path = Sketchup.temp_dir
full_name = File.join(path, "temp_image.jpg")
model.active_view.write_image(full_name, 500, 500, false, 0.0)

# Create a material and assign the testure to it.
material = materials.add("Test Material")
material.texture = full_name

# Assign the new material to our face we created
face.material = material

# Returns nil if not successful, path if successful
result = face.set_texture_projection(face.normal, true)

Parameters:

  • vector (Geom::Vector3d)

    representing the direction of the projection. Use nil to remove the projection.

  • frontside (Boolean)

    true for front side, false for back side.

Returns:

  • (Boolean)

    true on success

Version:

  • SketchUp 2014

#verticesArray<Sketchup::Vertex>

The vertices method is used to get an array of all of the vertices that bound the face.

Examples:

depth = 100
width = 100
model = Sketchup.active_model
entities = model.active_entities
pts = []
pts[0] = [0, 0, 0]
pts[1] = [width, 0, 0]
pts[2] = [width, depth, 0]
pts[3] = [0, depth, 0]

# Add the face to the entities in the model
face = entities.add_face(pts)
vertices = face.vertices

Returns:

Version:

  • SketchUp 6.0