Polygon Tool

[medeek]

When it comes to creating "tools" within SketchUp I am severely handicapped. I kind of understand what is going on but it is more of black box to me than anything. With the code below I am trying to have the user input in a polygon that will be the perimeter of the slab foundation. I've got it mostly working but cannot figure out how to make it snap to the x and y axis or start and end points of lines. My code thus far is below:

#########################################
#
# Foundation POSITIONING LOGIC (Polygon)
#
#########################################



module FoundationPositionToolPolygon


# --------  FOUNDATION POSITIONING TOOL  ------------------------------------------------

# Positions the foundation assembly. This tool allows the user
# to place the foundation assembly using the mouse to select a polygon 



class PositionToolPolygon

	# Show the Ruby Console at startup so we can
	# see any programming errors we may make.
	# SKETCHUP_CONSOLE.show

	#  these are the states that a tool can be in
	STATE_EDIT = 0 if not defined? STATE_EDIT
	STATE_PICK = 1 if not defined? STATE_PICK
	STATE_PICK_2 = 2 if not defined? STATE_PICK_2
	STATE_PICK_3 = 3 if not defined? STATE_PICK_3
	STATE_PICK_FINAL = 4 if not defined? STATE_PICK_FINAL
	STATE_MOVING = 6 if not defined? STATE_MOVING
	STATE_SELECT = 7 if not defined? STATE_SELECT
   

def initialize()

	

    	@tool_name = "FOUNDATION LOCATOR"
	@type = "foundation"
	@pointcount = 0
end

def reset
    	@pts = []
    	@state = STATE_PICK
	@pointcount = 0
	
    	# This sets the label for the VCB
    	Sketchup;;set_status_text "MEDEEK FOUNDATION", SB_VCB_LABEL
    	Sketchup;;set_status_text "[#{@tool_name}] Click first corner of Polygon"
	@status_text = "[#{@tool_name}] Click first corner of Polygon"
    	@drawn = false
end

def activate
    	@ip1 = Sketchup;;InputPoint.new
    	@ip = Sketchup;;InputPoint.new

	

    	self.reset
end

def deactivate(view)
    view.invalidate if @drawn
    @ip1 = nil
end


def onMouseMove(flags, x, y, view)
	self.set_current_point(x, y, view)
	Sketchup;;set_status_text @status_text,SB_PROMPT
end


def onLButtonDown(flags, x, y, view)
    	self.set_current_point(x, y, view)
    	self.update_state
end


def set_current_point(x, y, view)
    if (!@ip.pick(view, x, y, @ip1))
        return false
    end
    need_draw = true
    
    # Set the tooltip that will be displayed
    view.tooltip = @ip.tooltip
        
    # Compute points
    case @state
    when STATE_PICK
        @pts[0] = @ip.position
       	# need_draw = @ip.display? || @drawn
    when STATE_PICK_2
        @pts[1] = @ip.position
    when STATE_PICK_3
	@pts[2] = @ip.position
    when STATE_PICK_FINAL
	@pts[@pointcount] = @ip.position
    end   

    view.invalidate if need_draw
end

def update_state
    case @state
    when STATE_PICK
        @ip1.copy! @ip
	@pointcount = @pointcount + 1
        Sketchup;;set_status_text "[#{@tool_name}] Click second corner of Polygon"
        @state = STATE_PICK_2
	puts "#{@state} #{@pointcount}"
	@status_text = "[#{@tool_name}] Click second corner of Polygon"
    when STATE_PICK_2
        @ip1.clear
	@pointcount = @pointcount + 1
	Sketchup;;set_status_text "[#{@tool_name}] Click third corner of Polygon"
        @state = STATE_PICK_3
	puts "#{@state} #{@pointcount}"
	@status_text = "[#{@tool_name}] Click third corner of Polygon"
    when STATE_PICK_3
        @ip1.clear
	@pointcount = @pointcount + 1
	Sketchup;;set_status_text "[#{@tool_name}] Click fourth corner of Polygon"
        @state = STATE_PICK_FINAL
	puts "#{@state} #{@pointcount}"
	@status_text = "[#{@tool_name}] Click fourth corner of Polygon"
    when STATE_PICK_FINAL
	@ip1.clear
	ptcurrent = @ip.position
	@distorigin = @pts[0].distance ptcurrent
	if (@distorigin > 0.0001)
		@pointcount = @pointcount + 1
		@nextpointcount = @pointcount + 1
		@state = STATE_PICK_FINAL
		puts "#{@state} #{@pointcount}"
		Sketchup;;set_status_text "[#{@tool_name}] Click corner #{@nextpointcount} of Polygon"
		@status_text = "[#{@tool_name}] Click corner #{@nextpointcount} of Polygon"
	else
		# Final point picked
		
        	self.calculate_obj
        	Sketchup.active_model.select_tool(nil)
	end
	
    end
end


def calculate_obj
    	
	###########
	#
	# Check units of template again

	lengthconstant = Sketchup.active_model.options["UnitsOptions"]["LengthUnit"]

 	if (lengthconstant == 0) || (lengthconstant == 1)
		@Unitstemplate2 = "imperial"
	else
		@Unitstemplate2 = "metric"
 	end


	if @Unitstemplate2 == "metric"
		# Sketchup;;set_status_text "Foundation Width; #{@BuildingSpan_m.round(4)} m - Foundation Length; #{@BuildingLength_m.round(4)} m"
	else
		# Sketchup;;set_status_text "Foundation Width; #{@BuildingSpan_ft.round(4)} ft. - Foundation Length; #{@BuildingLength_ft.round(4)} ft."
	end
	
	MedeekMethods.main_menu_polygon @pts, @pointcount
   
end


def onCancel(flag, view)
    view.invalidate if @drawn
    reset
end

def onUserText(text, view)
    # The user may type in something that we can't parse as a length
    # so we set up some exception handling to trap that
    begin
        value = text.to_l
    rescue
        # Error parsing the text
        UI.beep
        value = nil
        Sketchup;;set_status_text "", SB_VCB_VALUE
    end
    return if !value
    
    case @state
    when STATE_PICK_NEXT
        # update the width
        vec = @pts[1] - @pts[0]
        if( vec.length > 0.0 )
            vec.length = value
            @pts[1] = @pts[0].offset(vec)
            view.invalidate
            self.update_state
        end
    when STATE_PICK_LAST
        # update the height
        vec = @pts[3] - @pts[0]
        if( vec.length > 0.0 )
            vec.length = value
            @pts[2] = @pts[1].offset(vec)
            @pts[3] = @pts[0].offset(vec)
            self.update_state
        end
    end
end

def getExtents
    bb = Geom;;BoundingBox.new
    case @state
    when STATE_PICK
        # We are getting the first point
        if( @ip.valid? && @ip.display? )
            bb.add @ip.position
        end
    when STATE_PICK_2
        bb.add @pts[0]
        bb.add @pts[1]
    when STATE_PICK_3
        bb.add @pts[2]
    when STATE_PICK_FINAL
	bb.add @pts
    end
    return bb
end

def onKeyDown(key, rpt, flags, view)
    if( key == CONSTRAIN_MODIFIER_KEY && rpt == 1 )
        @shift_down_time = Time.now
        
        # if we already have an inference lock, then unlock it
        if( view.inference_locked? )
            view.lock_inference
        elsif( @state == 0 )
            view.lock_inference @ip
        elsif( @state == 1 )
            view.lock_inference @ip, @ip1
	elsif( @state == 2 )
            view.lock_inference @ip, @ip1
	elsif( @state == 3 )
            view.lock_inference @ip, @ip1
	elsif( @state == 4 )
            view.lock_inference @ip, @ip1
        end
    end
end

def onKeyUp(key, rpt, flags, view)
    if( key == CONSTRAIN_MODIFIER_KEY &&
        view.inference_locked? &&
        (Time.now - @shift_down_time) > 0.5 )
        view.lock_inference
    end
end

# draw a polygon for the outline of the foundation
def draw(view)
    @drawn = false
    
    # Show the current input point
    if( @ip.valid? && @ip.display? )
        @ip.draw(view)
        @drawn = true
    end

    case @state
    when STATE_PICK
        # do nothing
    when STATE_PICK_2
        # just draw a line from the start to the end point
        view.set_color_from_line(@ip1, @ip)
	view.drawing_color = [0, 0, 200]
        inference_locked = view.inference_locked?
	view.line_width = 2 if inference_locked
	view.line_width = 2
        view.draw(GL_LINE_STRIP, @pts[0], @pts[1])
        @drawn = true
    else
	# view.set_color_from_line(@ip1, @ip)
	view.drawing_color = [0, 0, 200]
	inference_locked = view.inference_locked?
	view.line_width = 2 if inference_locked
	view.line_width = 2
        view.draw(GL_LINE_STRIP, @pts)
        @drawn = true
    end
end

end # class PositionToolPolygon


#######################################

end # module FoundationPositionToolPolygon

[Dan Rathbun]

Pls edit and remove code, then re-post properly indented code in a [ code ] ... [ /code ] block.

(Ie, no one will even attempt to read it.)

[medeek]

Hopefully that is a bit better.

[medeek]

What would be useful is if I could somehow constrain the line angle (or snap to) to 15 degree increments. Has anyone ever tried to do something like this?

[Rich O Brien]

Fredo's DrawAlong tool in Fredo Tools snaps to increments.

[Dan Rathbun]

You would basically save the user's current angle snap settings, set 15 degrees and angle snap ON, do your thing, then restore the user's settings.

At the least you should honor the user's settings (perhaps as a starting point.)

Access via Sketchup::Model#options(), ie:

model = Sketchup.active_model
manager = model.options

manager.each {|key| puts "#{key.name}" }
#=> PageOptions
#=> UnitsOptions
#=> SlideshowOptions
#=> NamedOptions
#=> PrintOptions

opts = manager["UnitsOptions"]
#=> #<Sketchup;;OptionsProvider;0x00000009215148>

opts.each {|key,name| puts "#{key} = #{name}" }
#=> LengthPrecision = 3
#=> LengthFormat = 0
#=> LengthUnit = 0
#=> LengthSnapEnabled = true
#=> LengthSnapLength = 0.0001
#=> AnglePrecision = 1
#=> AngleSnapEnabled = true
#=> SnapAngle = 15.0
#=> SuppressUnitsDisplay = false
#=> ForceInchDisplay = false

so:

def save_angle_options(model=Sketchup;;active_model)
  opts = model.options["UnitsOptions"]
  opts["AngleSnapEnabled"], opts["SnapAngle"]
end

def restore_angle_options(snapping,angle,model=Sketchup;;active_model)
  opts = model.options["UnitsOptions"]
  opts["AngleSnapEnabled"]= snapping
  opts["SnapAngle"]= angle
end

# In code elsewhere;

snapping, angle = save_angle_options()
# do your thing
restore_angle_options(snapping,angle)

[medeek]

Even when I'm drawing a line with the built in tools the angle snapping in SketchUp doesn't seem to work, what am I missing here?

[Dan Rathbun]

Angle snapping works for rotational tools or tool states.

Length snapping would work for linear tool states.