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# frozen_string_literal: true
FF::Scn::BoidCalculations.add(FF::Sys.new('ApplyBoidCalculations', priority: 75) do
@center ||= Camera::Circle.new(color: [0.25, 0.0, 0.5, 0.5],
radius: 10,
sectors: 10,
z: -49)
@center_vel ||= Camera::Line.new(color: [0.25, 0.0, 0.5, 0.5],
width: 12,
z: -50)
unless $config.debug
@center.remove
@center_vel.remove
end
group_velocity = [0.0, 0.0]
center_mass = [0.0, 0.0]
boids_count = FF::Cmp::Boids.each.to_a.count
FF::Cmp::Boids.each do |boid|
boid.vx += boid.cx
boid.vy += boid.cy
FF::Sys::Limit.call
boid.x += boid.vx
boid.y += boid.vy
if boid.vx.negative? && !boid.flipped
boid.flipped = true
spr = boid.entities.first.components[FF::Cmp::BoidVisuals].first.obj
spr.width = -spr.width.abs
# flip
elsif boid.vx.positive? && boid.flipped
# unflip
boid.flipped = false
spr = boid.entities.first.components[FF::Cmp::BoidVisuals].first.obj
spr.width = spr.width.abs
end
boid.cx = 0.0
boid.cy = 0.0
center_mass[0] += boid.x
center_mass[1] += boid.y
group_velocity[0] += boid.vx
group_velocity[1] += boid.vy
end
group_velocity = [0.0, 0.0]
center_mass = [0.0, 0.0]
boids_count = FF::Cmp::Fish[0].entities.count
FF::Cmp::Fish[0].entities.each do |ent|
boid = ent.components[FF::Cmp::Boids].first
center_mass[0] += boid.x
center_mass[1] += boid.y
group_velocity[0] += boid.vx
group_velocity[1] += boid.vy
end
@center_vel.x1 = @center.x = (center_mass[0] / boids_count)
@center_vel.y1 = @center.y = (center_mass[1] / boids_count)
@center_vel.x1 += @center.radius
@center_vel.y1 += @center.radius
if $follow
Camera.x = @center_vel.x1 = @center.x + @center.radius
Camera.y = @center_vel.y1 = @center.y + @center.radius
end
@center_vel.x2 = @center_vel.x1 + ((group_velocity[0] / boids_count) * 10.0)
@center_vel.y2 = @center_vel.y1 + ((group_velocity[1] / boids_count) * 10.0)
end)
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