Class: Disp3D::Picker

Inherits:
Object
  • Object
show all
Defined in:
lib/picker.rb

Constant Summary collapse

NONE =

pick modes

0
POINT_PICK = 
1
LINE_PICK = 
2
RECT_PICK = 
3

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(view) ⇒ Picker

Returns a new instance of Picker.



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# File 'lib/picker.rb', line 14

def initialize(view)
  @view = view
  @max_select_count = 100
  @pick_mode = NONE
end

Instance Attribute Details

#max_select_count ⇒ Object

Returns the value of attribute max_select_count.



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# File 'lib/picker.rb', line 6

def max_select_count
  @max_select_count
end

#pick_mode ⇒ Object (readonly)

Returns the value of attribute pick_mode.



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# File 'lib/picker.rb', line 5

def pick_mode
  @pick_mode
end

Instance Method Details

#end_pick ⇒ Object 



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# File 'lib/picker.rb', line 43

def end_pick
  @pick_mode = NONE
end

#motion(x, y) ⇒ Object

users donot need to use this. return if picking process is in progress?



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# File 'lib/picker.rb', line 83

def motion(x,y)
  return false if(@pick_mode == NONE || @last_pos.nil?)
  if(@pick_mode == LINE_PICK)
    if(@rubber_band)
      draw_rubber_band([FiniteLine.new(@last_pos, @save_pos), FiniteLine.new(@last_pos, Vector3.new(x,y))])
    else
      draw_rubber_band(FiniteLine.new(@last_pos, Vector3.new(x,y)))
    end
  elsif(@pick_mode == RECT_PICK)
    if(@rubber_band)
      draw_rubber_band([Box.new(@last_pos, @save_pos), Box.new(@last_pos, Vector3.new(x,y))])
    else
      draw_rubber_band(Box.new(@last_pos, Vector3.new(x,y)))
    end
  end
  @save_pos = Vector3.new(x, y)
  @rubber_band=true
  return true
end

#mouse(button, state, x, y) ⇒ Object

users donot need to use this.



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# File 'lib/picker.rb', line 48

def mouse(button,state,x,y)
  return if(@pick_mode == NONE)
  if(button == GLUT::GLUT_LEFT_BUTTON && state == GLUT::GLUT_DOWN)
    if(@pick_mode == POINT_PICK)
      picked_result = point_pick(x,y)
      @post_pick_process.call(picked_result) if(!@post_pick_process.nil?)
      return
    elsif(@pick_mode == LINE_PICK)
      @line_start_result = point_pick(x,y)
    end
    @last_pos = Vector3.new(x, y)
    @rubber_band = false
  elsif(button == GLUT::GLUT_LEFT_BUTTON && state == GLUT::GLUT_UP)
    if(@pick_mode == LINE_PICK)
      draw_rubber_band(FiniteLine.new(@last_pos, @save_pos)) # delete rubber band
      line_end_result =  pick(x, y)
      @post_pick_process.call(@line_start_result, line_end_result) if(!@post_pick_process.nil?)
      @line_start_result = nil
    elsif(@pick_mode == RECT_PICK)
      draw_rubber_band(Box.new(@last_pos, @save_pos)) # delete rubber band
      pick_x = (x + @last_pos.x)/2
      pick_y = (y + @last_pos.y)/2
      width  = (x - @last_pos.x).abs
      height = (y - @last_pos.y).abs
      picked_result = pick(pick_x, pick_y, width, height)
      @post_pick_process.call(picked_result) if(!@post_pick_process.nil?)
    end
    @save_pos = nil
    @last_pos = nil
    @rubber_band = false
  end
end

#point_pick(x, y) ⇒ Object 



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# File 'lib/picker.rb', line 20

def point_pick(x,y)
  pick(x, y)
end

#post_picked(&block) ⇒ Object 



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# File 'lib/picker.rb', line 24

def post_picked(&block)
  @post_pick_process = block
end

#start_line_pick(&block) ⇒ Object 



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# File 'lib/picker.rb', line 33

def start_line_pick(&block)
  @pick_mode = LINE_PICK
  post_picked(&block) if(block_given?)
end

#start_point_pick(&block) ⇒ Object 



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# File 'lib/picker.rb', line 28

def start_point_pick(&block)
  @pick_mode = POINT_PICK
  post_picked(&block) if(block_given?)
end

#start_rect_pick(&block) ⇒ Object 



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# File 'lib/picker.rb', line 38

def start_rect_pick(&block)
  @pick_mode = RECT_PICK
  post_picked(&block) if(block_given?)
end