Class: Mittsu::Line

Inherits:
Object3D show all
Defined in:
lib/mittsu/objects/line.rb

Direct Known Subclasses

CameraHelper

Constant Summary

Constants inherited from Object3D

Object3D::DefaultUp

Instance Attribute Summary collapse

Attributes inherited from Object3D

#cast_shadow, #children, #frustum_culled, #id, #matrix, #matrix_auto_update, #matrix_world, #matrix_world_needs_update, #name, #parent, #position, #quaternion, #receive_shadow, #render_order, #rotation, #rotation_auto_update, #scale, #up, #user_data, #uuid, #visible

Instance Method Summary collapse

Methods inherited from Object3D

#add, #apply_matrix, #get_object_by_id, #get_object_by_name, #get_object_by_property, #get_world_direction, #get_world_position, #get_world_quaternion, #get_world_rotation, #get_world_scale, #local_to_world, #look_at, #print_tree, #remove, #rotate_on_axis, #rotate_x, #rotate_y, #rotate_z, #set_rotation_from_axis_angle, #set_rotation_from_euler, #set_rotation_from_matrix, #set_rotation_from_quaternion, #to_json, #to_s, #translate_on_axis, #translate_x, #translate_y, #translate_z, #traverse, #traverse_ancestors, #traverse_visible, #update_matrix, #update_matrix_world, #world_to_local

Methods included from EventDispatcher

#add_event_listener, #dispatch_event, #has_event_listener, #remove_event_listener

Constructor Details

#initialize(geometry = nil, material = nil, mode = nil) ⇒ Line

Returns a new instance of Line.



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# File 'lib/mittsu/objects/line.rb', line 5

def initialize(geometry = nil, material = nil, mode = nil)
  super()

  @type = 'Line'

  @geometry = geometry || Geometry.new
  @material = material || LineBasicMaterial.new(color: (rand * 0xffffff).to_i)

  @mode = mode || LineStrip

  @_inverse_matrix = Matrix4.new
  @_ray = Ray.new
  @_sphere = Sphere.new
end

Instance Attribute Details

#geometry ⇒ Object

Returns the value of attribute geometry.



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# File 'lib/mittsu/objects/line.rb', line 3

def geometry
  @geometry
end

#material ⇒ Object

Returns the value of attribute material.



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# File 'lib/mittsu/objects/line.rb', line 3

def material
  @material
end

#mode ⇒ Object

Returns the value of attribute mode.



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# File 'lib/mittsu/objects/line.rb', line 3

def mode
  @mode
end

#morph_target_base ⇒ Object

Returns the value of attribute morph_target_base.



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# File 'lib/mittsu/objects/line.rb', line 3

def morph_target_base
  @morph_target_base
end

#type ⇒ Object

Returns the value of attribute type.



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# File 'lib/mittsu/objects/line.rb', line 3

def type
  @type
end

Instance Method Details

#clone(object = Line.new(@geometry, @material, @mode)) ⇒ Object 



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# File 'lib/mittsu/objects/line.rb', line 137

def clone(object = Line.new(@geometry, @material, @mode))
  super(object)
  object
end

#raycast(raycaster, intersects) ⇒ Object 



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# File 'lib/mittsu/objects/line.rb', line 20

def raycast(raycaster, intersects)
  precision = raycaster.line_precision
  precision_sq = precision * precision

  @geometry.compute_bounding_sphere if @geometry.bounding_sphere.nil?

  # Checking bounding_sphere distance to ray

  @_sphere.copy(geometry.bounding_sphere)
  @_sphere.apply_matrix4(@matrix_world)

  return unless raycaster.ray.intersetion_sphere?(sphere)

  @_inverse_matrix.get_inverse(@matrix_world)
  @_ray.copy(raycaster.ray).apply_matrix4(@_inverse_matrix)

  v_start = Vector3.new
  v_end = Vector3.new
  inter_segment = Vector3.new
  inter_ray = Vector3.new
  step = @mode == LineStrip ? 1 : 2

  if geometry.is_a?(BufferGeometry)
    attributes = @geometry.attributes

    if !attributes.index.nil?
      indices = attributes.index.array
      positions = attributes.position.array
      offsets = geometry.offsets

      if offsets.empty?
        offsets = [{ start: 0, count: indices.length, index: 0 }]
      end

      offsets.each_with_index do |offset, oi|
        start = offset[:start]
        count = offset[:count]

        (start...(count-1)).step(step).each do |i|
          v_start.from_array(positions, a * 3)
          v_end.from_array(positions, b * 3)

          dist_sq = @_ray.distance_sq_to_segment(v_start, v_end, inter_ray, inter_segment)

          next if dist_sq > precision_sq

          distance = @_ray.origin.distance_to(inter_ray)

          next if distance < raycaster.near || distance > raycaster.far

          intersects << {
            distance: distance,
            # What to we want? intersection point on the ray or on the segment??
            # point: raycaster.ray.at(distance),
            point: inter_segment.clone.apply_matrix4(@matrix_matrix),
            index: i,
            offset_index: oi,
            face: nil,
            face_index: nil,
            object: self
          }
        end
      end
    else
      positions = attributes.position.array

      (0...(positions.length / 3 - 1)).step(step) do |i|
        v_start.from_array(positions, 3 * i)
        v_end.from_array(positions, 3 * i + 3)

        dist_sq = @_ray.distance_sq_to_segment(v_start, v_end, inter_ray, inter_segment)

        next if dist_sq > precision_sq

        distance = @_ray.origin.distance_to(inter_ray)

        next if distance < raycaster.near || distance > raycaster.far

        intersects << {
          distance: distance,
          # What do we want? intersection point on the ray or on the segment??
          # point: raycaster.ray.at(distance),
          point: inter_segment.clone.apply_matrix4(@matrix_world),
          index: i,
          face: nil,
          face_index: nil,
          object: self
        }
      end
    end
  elsif geometry.is_a?(Geometry)
    vertices = @geometry.vertices
    nb_vertices = vertices.length

    (0...(nb_vertices - 1)).step(step).each do |i|
      dist_sq = @_ray.distance_sq_to_segment(vertices[i], vertices[i + 1], inter_ray, inter_segment)

      next if dist_sq > precision_sq

      distance = @_ray.origin.distance_to(inter_ray)

      next if distance < raycaster.near || distance > raycaster.far

      intersects << {
        distance: distance,
        # What do we want? intersection point on the ray or on the segment??
        # point: raycaster.ray.at(distance),
        point: inter_segment.clone.apply_matrix4(@matrix_world),
        index: i,
        face: nil,
        face_index: nil,
        object: self
      }
    end
  end
end