script.lua

-- Helpers
function str_split(inputstr, sep)
	if sep == nil then
		sep = "%s"
	end
	
	local t = {}
	for str in string.gmatch(inputstr, "([^"..sep.."]+)") do
		table.insert(t, str)
	end

	return t
end

function goto_facet(f)
	if f > 0 then 
		print("double click on facet:" .. tostring(f))
		local min, max = get_facet_bbox(app.model, f)
		print("min:" .. min:to_string())
		print("max:" .. max:to_string())
		app.camera:look_at_box({min, max})
	end
end

function init()

end

-- Parameters
local filter_ids = ""
local id = ""
local invert = false
local n_ring_size = 0

function update_filter()
	local tri_model = app.model:as_tri()
	local fa = FacetAttributeDouble.new(invert and 0.0 or 1.0)
	fa:bind("_filter", tri_model.surface_attributes, tri_model.mesh)
	local v = invert and 0.0 or 1.0
	print("choose " .. tostring(v))
	fa:fill(v)

	local t = str_split(filter_ids, ";")
	for i=1, #t do 
		local id = tonumber(t[i])
		if id then 
			fa[id] = invert and 1.0 or 0.0

			local ring_ids = n_ring(app.model, id, n_ring_size)
			for j=1, #ring_ids do 
				fa[ring_ids[j]] = invert and 1.0 or 0.0
			end
		end

	end

	app.model:set_filter(ElementKind.FACETS_ELT, true)
end

function layout_gui() 
	return {
		["Toolbar##tool_bar_diagnostic"] = "tool_bar",
		["Filter & N-Ring##window_filter_and_nring"] = "tool_bar"
	}
end

local diagnostic_filter_and_nring_path = "diagnostic/filter-and-nring"

function draw_gui()

	if not app.has_models then 
		return
	end


	imgui.Begin("Toolbar##tool_bar_diagnostic")


	if app.navigation_path:str() == diagnostic_filter_and_nring_path then 
		imgui.BeginDisabled()
	end

	local has_changed = false
	if imgui.Button("Filter & N-Ring") then 
		-- Change nav path
		app.navigation_path = diagnostic_filter_and_nring_path
		has_changed = true
	end

	if not has_changed and app.navigation_path:str() == diagnostic_filter_and_nring_path then 
		imgui.EndDisabled()
	end

	if imgui.Button("Return to main") then 
		-- Change nav path
		app.navigation_path = ""
	end

	imgui.End()

	if app.navigation_path:str() == diagnostic_filter_and_nring_path then

		imgui.Begin("Filter & N-Ring##window_filter_and_nring")


		
		local sel, new_filter_ids = imgui.InputText("Facet ids to filter", filter_ids, 255)
		filter_ids = new_filter_ids

		if sel then 
			update_filter()
		end



		local sel_n_ring_size, new_n_ring_size = imgui.InputInt("N Ring", n_ring_size)
		if sel_n_ring_size then 
			n_ring_size = new_n_ring_size
			update_filter()
		end

		imgui.SameLine()
		local sel_invert, new_invert = imgui.Checkbox("Invert", invert)
		if sel_invert then 
			invert = new_invert
			update_filter()
		end



		if imgui.SmallButton("Go to facet") then 
			local t = str_split(filter_ids, ";")
			if #t > 0 then
				local id = tonumber(t[1])
				if id then
					goto_facet(id) 
				end 
			end
		end

		local hovered_facet = app.input_state.facet.hovered
		imgui.Text("Hovered facet: " .. tostring(hovered_facet))

		imgui.End()

	end


end

function mouse_button()
	if app.navigation_path:str() == diagnostic_filter_and_nring_path then
		if app.input_state.mouse.dbl_buttons[1] then 
			-- Go to
			local f = app.input_state.facet.hovered
			goto_facet(f)
		end
	end
end



function navigation_path_changed(old_path, new_path)
	-- Setup gfx !
	-- if new_path[1] == "diagnostic" and new_path[2] == "filter-and-nring" then 
	if new_path:str() == "diagnostic/filter-and-nring" then 

		-- TODO save previous gfx

		app.model.points.visible = false 
		app.model.edges.visible = true
		app.model.edges.thickness = 1.
		app.model.mesh.size = 1.

	end

	if #new_path == 0 then 
		app.model.edges.visible = false
		app.model.mesh.size = 0.
	end

end