Big ol refactor of scripts

assets/entities/plane.lua

@@ -1,16 +1,19 @@
 module('entity')
+module('math')
+module('color')
 
 function entityInit()
   entityPositionAdd(ENTITY_ID)
 
   local phys = entityPhysicsAdd(ENTITY_ID)
   phys.bodyType = PHYSICS_BODY_STATIC
-  phys:setShapePlane(0, 1, 0, 0)
+  phys:setShapePlane(vec3(0, 1, 0), 0)
 
   local mesh = entityMeshAdd(ENTITY_ID)
   mesh:generatePlane(20, 20)
 
-  entityMaterialAdd(ENTITY_ID)
+  local mat = entityMaterialAdd(ENTITY_ID)
+  mat.color = colorBlack()
 end
 
 function entityDispose()