Class: Mittsu::CameraHelper

Inherits:
Line show all
Defined in:
lib/mittsu/extras/helpers/camera_helper.rb

Constant Summary

Constants inherited from Object3D

Object3D::DefaultUp

Instance Attribute Summary collapse

Attributes inherited from Line

#mode, #morph_target_base, #type

Attributes inherited from Object3D

#active, #cast_shadow, #children, #frustum_culled, #id, #initted, #matrix_world, #matrix_world_needs_update, #model_view_matrix, #morph_target_influences, #name, #parent, #position, #quaternion, #receive_shadow, #render_order, #renderer, #rotation, #rotation_auto_update, #scale, #type, #up, #user_data, #uuid, #visible

Instance Method Summary collapse

Methods inherited from Line

#add_opengl_object, #clone, #init_geometry, #raycast, #render_buffer, #update

Methods inherited from Object3D

#active?, #add, #add_opengl_object, #apply_matrix, #buffer_material, #clone, #deinit, #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, #init, #init_geometry, #load_uniforms_matrices, #local_to_world, #look_at, #print_tree, #project, #raycast, #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, #setup_matrices, #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(camera) ⇒ CameraHelper

Returns a new instance of CameraHelper.



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# File 'lib/mittsu/extras/helpers/camera_helper.rb', line 7

def initialize(camera)
  @_vector = Vector3.new
  @_camera = Camera.new

  @geometry = Geometry.new
  @material = LineBasicMaterial.new(color: 0xffffff, vertex_colors: FaceColors)

  @point_map = {}

  # colors

  hex_frustrum = 0xffaa00
  hex_cone = 0xff0000
  hex_up = 0x00aaff
  hex_target = 0xffffff
  hex_cross = 0x333333

  # near

  add_line(:n1, :n2, hex_frustrum)
  add_line(:n2, :n4, hex_frustrum)
  add_line(:n4, :n3, hex_frustrum)
  add_line(:n3, :n1, hex_frustrum)

  # far

  add_line(:f1, :f2, hex_frustrum)
  add_line(:f2, :f4, hex_frustrum)
  add_line(:f4, :f3, hex_frustrum)
  add_line(:f3, :f1, hex_frustrum)

  # sides

  add_line(:n1, :f1, hex_frustrum)
  add_line(:n2, :f2, hex_frustrum)
  add_line(:n3, :f3, hex_frustrum)
  add_line(:n4, :f4, hex_frustrum)

  # cone

  add_line(:p, :n1, hex_cone)
  add_line(:p, :n2, hex_cone)
  add_line(:p, :n3, hex_cone)
  add_line(:p, :n4, hex_cone)

  # up

  add_line(:u1, :u2, hex_up)
  add_line(:u2, :u3, hex_up)
  add_line(:u3, :u1, hex_up)

  # target

  add_line(:c, :t, hex_target)
  add_line(:p, :c, hex_cross)

  # cross

  add_line(:cn1, :cn2, hex_cross)
  add_line(:cn3, :cn4, hex_cross)

  add_line(:cf1, :cf2, hex_cross)
  add_line(:cf3, :cf4, hex_cross)

  super(@geometry, @material, LinePieces)

  @camera = camera

  @matrix = camera.matrix_world
  @matrix_auto_update = false

  update_points
end

Instance Attribute Details

#camera ⇒ Object

Returns the value of attribute camera.



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# File 'lib/mittsu/extras/helpers/camera_helper.rb', line 5

def camera
  @camera
end

#geometry ⇒ Object

Returns the value of attribute geometry.



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# File 'lib/mittsu/extras/helpers/camera_helper.rb', line 5

def geometry
  @geometry
end

#material ⇒ Object

Returns the value of attribute material.



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# File 'lib/mittsu/extras/helpers/camera_helper.rb', line 5

def material
  @material
end

#matrix ⇒ Object

Returns the value of attribute matrix.



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# File 'lib/mittsu/extras/helpers/camera_helper.rb', line 5

def matrix
  @matrix
end

#matrix_auto_update ⇒ Object

Returns the value of attribute matrix_auto_update.



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# File 'lib/mittsu/extras/helpers/camera_helper.rb', line 5

def matrix_auto_update
  @matrix_auto_update
end

#point_map ⇒ Object

Returns the value of attribute point_map.



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# File 'lib/mittsu/extras/helpers/camera_helper.rb', line 5

def point_map
  @point_map
end

Instance Method Details

#update_points ⇒ Object 



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# File 'lib/mittsu/extras/helpers/camera_helper.rb', line 81

def update_points
  w = 1.0
  h = 1.0

  # we need just camera projection matrix
  # world matrix must be identity

  @_camera.projection_matrix.copy(@camera.projection_matrix)

  # center / target

  set_point(:c, 0.0, 0.0, -1.0)
  set_point(:t, 0.0, 0.0, 1.0)

  # near

  set_point(:n1, -w, -h, -1.0)
  set_point(:n2,  w, -h, -1.0)
  set_point(:n3, -w,  h, -1.0)
  set_point(:n4,  w,  h, -1.0)

  # far

  set_point(:f1, -w, -h, 1.0)
  set_point(:f2,  w, -h, 1.0)
  set_point(:f3, -w,  h, 1.0)
  set_point(:f4,  w,  h, 1.0)

  # up

  set_point(:u1,  w * 0.7, h * 1.1, -1.0)
  set_point(:u2, -w * 0.7, h * 1.1, -1.0)
  set_point(:u3,      0.0, h * 2.0, -1.0)

  # cross

  set_point(:cf1,  -w, 0.0, 1.0)
  set_point(:cf2,   w, 0.0, 1.0)
  set_point(:cf3, 0.0,  -h, 1.0)
  set_point(:cf4, 0.0,   h, 1.0)

  set_point(:cn1,  -w, 0.0, -1.0)
  set_point(:cn2,   w, 0.0, -1.0)
  set_point(:cn3, 0.0,  -h, -1.0)
  set_point(:cn4, 0.0,   h, -1.0)

  @geometry.vertices_need_update = true
end