multi registry.components

develop/example.lua

@@ -1,5 +1,7 @@
 local evo = require 'evolved.evolved'
 
+local v2 = evo.vectors.vector2
+
 local singles = {
     delta_time = evo.singles.single(0.016),
 }
@@ -10,25 +12,29 @@ local fragments = {
 }
 
 local queries = {
-    bodies = evo.registry.query(fragments.position, fragments.velocity),
+    bodies = evo.registry.query(
+        fragments.position,
+        fragments.velocity),
 }
 
 do
     evo.registry.entity()
-        :set(fragments.position, evo.vectors.vector2(512, 50))
-        :set(fragments.velocity, evo.vectors.vector2(math.random(-20, 20), 20))
+        :set(fragments.position, v2(512, 50))
+        :set(fragments.velocity, v2(math.random(-20, 20), 20))
 end
 
 do
-    local dt = evo.singles.get(singles.delta_time)
+    local delta_time = evo.singles.get(singles.delta_time)
 
     for chunk in queries.bodies:execute() do
-        local es = chunk:entities()
-        local ps = chunk:components(fragments.position)
-        local vs = chunk:components(fragments.velocity)
+        local entities = chunk:entities()
 
-        for i = 1, #es do
-            ps[i] = ps[i] + vs[i] * dt
+        local positions, velocities = chunk:components(
+            fragments.position,
+            fragments.velocity)
+
+        for i = 1, #entities do
+            positions[i] = positions[i] + velocities[i] * delta_time
         end
     end
 end