From 60a571914e782a23cee23765fd87d52c844f3df1 Mon Sep 17 00:00:00 2001
From: ubq323 <ubq323@ubq323.website>
Date: Fri, 5 Jan 2024 14:19:02 +0000
Subject: transitive connections

---
 main.lua | 58 ++++++++++++++++++++++++++++++++++++++++++++++++----------
 1 file changed, 48 insertions(+), 10 deletions(-)

diff --git a/main.lua b/main.lua
index fa41c00..3ffd33b 100644
--- a/main.lua
+++ b/main.lua
@@ -59,6 +59,11 @@ function Wire.make(cls, p1,p2, color)
 	}, cls)
 end
 function Wire.draw(self, istate)
+	if istate == 'normal' then
+		G.setLineWidth(0.01)
+	else
+		G.setLineWidth(0.02)
+	end
 	G.setColor(self.color)
 	G.line(self.curve)
 end
@@ -105,23 +110,29 @@ function PortGraph.add(self,...)
 	local p = Port:make(...)
 	self.ports[p] = true
 end
-function PortGraph.istate_of_port(self,port)
+function PortGraph.istate_of_port(self,port,emph)
 	if self.state == 'joining' and self.selected == port then
 		return 'selected'
 	elseif self.state == 'editing' and self.selected == port then
 		return 'editing'
-	elseif port:contains(util.mouse_pos()) then
+	elseif emph[port] then
 		return 'hover'
 	else
 		return 'normal'
 	end
 end
-function PortGraph.istate_of_wire(self, wire)
-	return 'normal'
+function PortGraph.istate_of_wire(self, wire, emph)
+	if emph[wire] then return 'hover' else return 'normal' end
 end
 function PortGraph.draw(self)
+	local hp = hovered(self.ports)
+	local emph_ports = {}
+	local emph_wires = {}
+	if hp then
+		emph_ports, emph_wires = self:trans_conns(hp)
+	end
 	for p in pairs(self.ports) do
-		local istate = self:istate_of_port(p)
+		local istate = self:istate_of_port(p, emph_ports)
 		p:draw(istate)
 	end
 	for w in pairs(self.wires) do
@@ -130,7 +141,7 @@ function PortGraph.draw(self)
 				goto next
 			end
 		end
-		local istate = self:istate_of_wire(w)
+		local istate = self:istate_of_wire(w, emph_wires)
 		w:draw(istate)
 		::next::
 	end
@@ -148,6 +159,23 @@ function PortGraph.draw(self)
 		end
 	end
 end
+function PortGraph.trans_conns(self, port)
+	local seen = {}
+	local queue = {[port]=true}
+	local wires = {}
+	while next(queue) do
+		local p = next(queue)
+		queue[p] = nil
+		seen[p] = true
+		for q,w in pairs(p.conns) do
+			if not seen[q] then
+				queue[q] = true
+				wires[w] = true
+			end
+		end
+	end
+	return seen, wires
+end
 
 function PortGraph.make_edit_handles(self)
 	local p = self.selected
@@ -252,11 +280,21 @@ function PortGraph.remove_conn(self,p1,p2)
 end
 
 local pg = PortGraph:make()
-local n = 10
-for i = 1,n do
-	local theta = tau * i/n
-	pg:add(math.cos(theta), math.sin(theta), i)
+local i = 1
+local S = math.sqrt(3)
+for q = -3,2 do
+	for r = -3,3 do
+		local x = q*S + r*S/2
+		local y = r*3/2
+		pg:add(x/4,y/4,i)
+		i=i+1
+	end
 end
+-- local n = 10
+-- for i = 1,n do
+-- 	local theta = tau * i/n
+-- 	pg:add(math.cos(theta), math.sin(theta), i)
+-- end
 
 function love.mousepressed(x,y,b)
 	local ok, err = pcall(pg.click, pg, b)
-- 
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