distances

src/main.lua

@@ -1,11 +1,7 @@
 local screen_width, screen_height = love.graphics.getDimensions()
--- print(screen_width, screen_height)
 local node_radius = 5
 local safe_zone = 15
 
--- programmatically determined later
-local translation = {0, 0} -- x, z
-
 
 
 -- TODO load from JSON instead of defining here!
@@ -17,8 +13,8 @@ local nodes = {
   TestB = {150, 0, 200},
   TestC = {300, 0, -200, true},
   TestE = {1200, 0, 200, "Displayed Name"},
-  TestFarLeft = {-200, 0, 50},
-  TestFarBottomRight = {1200, 0, 2000, true},
+  TestFarLeft = {-200, 5000, 50},
+  -- TestFarBottomRight = {1200, 0, 2000, true},
 
   -- for testing automatic scaling/positioning
   TopLeft = {0, 0, 0},
@@ -34,6 +30,7 @@ local edges = {
   {"TestA", "TestC"},
   {"TestB", "TestC"},
   {"TestC", "TestE"},
+  {"TestE", "TestFarLeft"},
 }
 
 
@@ -55,12 +52,10 @@ for _, node in pairs(nodes) do
     minimums[2] = node[3]
   end
 end
--- print(minimums[1], minimums[2], maximums[1], maximums[2])
 
--- find scale factor
+-- find scale factor, translate
 local distance_x = maximums[1] - minimums[1]
 local distance_z = maximums[2] - minimums[2]
--- print(distance_x, distance_z)
 local scale = math.min((screen_width - safe_zone * 2) / distance_x, (screen_height - safe_zone * 2) / distance_z)
 local translation = {-minimums[1] + safe_zone / scale, -minimums[2] + safe_zone / scale}
 
@@ -72,25 +67,34 @@ function love.draw()
   love.graphics.translate(unpack(translation))
 
   -- draw edges below nodes
-  love.graphics.setColor(0.33, 0.33, 0.33, 1)
   for index, edge in ipairs(edges) do
     local node_a = nodes[edge[1]]
     local node_b = nodes[edge[2]]
     if (not node_a) or (not node_b) then
       error("Edge " .. index .. " names nonexistent node(s): " .. edge[1] .. "->" .. node_a .. ", " .. edge[2] .. "->" .. node_b)
     end
+
+    love.graphics.setColor(0.33, 0.33, 0.33, 1)
     love.graphics.line(node_a[1], node_a[3], node_b[1], node_b[3])
+
+    local center_x = node_a[1] + (node_b[1] - node_a[1]) / 2
+    local center_z = node_a[3] + (node_b[3] - node_a[3]) / 2
+    local distance = math.floor(math.sqrt((node_b[3] - node_a[3])^2 + (node_b[2] - node_a[2])^2 + (node_b[1] - node_a[1])^2))
+
+    love.graphics.setColor(0.67, 0.67, 0.67, 1)
+    love.graphics.print(distance .. "m", center_x, center_z - font:getHeight() / 2, 0, 1 / scale, 1 / scale)
   end
 
   -- draw nodes and label them
   love.graphics.setColor(1, 1, 1, 1)
   for name, node in pairs(nodes) do
     love.graphics.circle("fill", node[1], node[3], node_radius / scale)
+
     if node[4] then
       if type(node[4]) == "string" then
         name = node[4]
       end
-      -- love.graphics.print(name, node[1] + node_radius / scale, node[3] + node_radius / scale, 0, 1 / scale, 1 / scale)
+
       local text_x, text_y = node[1] + node_radius / scale, node[3] + node_radius / scale
 
       local difference = node[1] + font:getWidth(name) - maximums[1]