add cohesion and debug stuff

1 files changed, 27 insertions, 0 deletions

diff --git a/app/systems/rules/cohesion.rb b/app/systems/rules/cohesion.rb
new file mode 100644
index 0000000..7e33961
--- /dev/null
+++ b/app/systems/rules/cohesion.rb
@@ -0,0 +1,27 @@
+FF::Scn::BoidRules.add(
+  FF::Sys.new('BoidsCohesion', priority: 50) do
+    center_mass = [0.0, 0.0]
+    boids_count = FF::Cmp::BoidsCohesion.data.count
+
+    FF::Cmp::BoidsCohesion.each do |cohesion|
+      boid = cohesion.entities[0].components[FF::Cmp::Boid][0]
+      center_mass[0] += boid.x
+      center_mass[1] += boid.y
+      #puts boid.x
+      #puts boid.y
+    end
+    
+    #puts center_mass
+    FF::Cmp::BoidsCohesion.each do |cohesion|
+      boid_update = cohesion.entities[0].components[FF::Cmp::Boid][0]
+      move_boid = center_mass.dup
+      move_boid[0] -= boid_update.x
+      move_boid[1] -= boid_update.y
+      move_boid[0] /= boids_count - 1.0
+      move_boid[1] /= boids_count - 1.0
+
+      boid_update.cx += (move_boid[0] - boid_update.x) / cohesion.strength.to_i
+      boid_update.cy += (move_boid[1] - boid_update.y) / cohesion.strength.to_i
+    end
+  end
+)