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Fix radii and get rid of most self-intersections

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arne 2022-12-18 18:04:37 +01:00
commit a0c302939a
1 changed files with 32 additions and 21 deletions
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53
src/aphorisms/thirty_four.clj
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@ -15,13 +15,13 @@
;; parameters to influence how the end result looks ;; parameters to influence how the end result looks
(def start-size 12.0) (def start-size 7.0)
(def min-size 8.0) (def min-size 4.0)
(def shrink 0.8) ;; factor by which size decreases at each step (def shrink 0.8) ;; factor by which size decreases at each step
(def spaciousness 2.0) ;; size of neighbor-check for each node (def spaciousness 2.5) ;; size of neighbor-check for each node
(def max-path-length 50) ;; how long are the strings of nodes? (def max-path-length 30) ;; how long are the strings of nodes?
(def num-paths 25) ;; how many strings should be generated max? (def num-paths 45) ;; how many strings should be generated max?
;; all nodes look like this: {:shape circ, :direction vec2} ;; all nodes look like this: {:shape circ, :direction vec2}
@ -45,17 +45,26 @@
(g/scale-size circ 1.5))))) (g/scale-size circ 1.5)))))
(first))) (first)))
(defn next-node [quadtree cur] (defn next-node [quadtree path]
(->> (repeatedly 10 (fn [] (let [cur (peek path)]
(-> (update cur :shape (fn [c] (->> (repeatedly 10 (fn []
(-> (update c :r #(Math/max (* % shrink) min-size)) (-> (update cur :shape (fn [c]
(update :p #(g/translate % (m/* (:direction cur) (:r c))))))) (-> (update c :r #(Math/max (* % shrink) min-size))
(update :direction wobble)))) (update :p #(g/translate % (m/* (:direction cur) (* 2 (:r c))))))))
(filter (fn [node] (update :direction wobble))))
(when-not (nice-place? quadtree node) (filter (fn [node]
(prn node)) (and (nice-place? quadtree node)
(nice-place? quadtree node))) ;; avoid self-intersections
(first))) (every? (fn [other]
;; (prn other)
;; (prn (g/dist (-> node :shape :p) (-> other :shape :p)))
;; (prn )
(> (g/dist (-> node :shape :p) (-> other :shape :p))) (+ (-> node :shape :r) (-> other :shape :r))) path))))
(first))))
(comment
(make-path (st/quadtree bounds))
)
;; let's generate different paths of hyphae, each a most 50 nodes long ;; let's generate different paths of hyphae, each a most 50 nodes long
@ -63,14 +72,15 @@
(defn make-path [quadtree] (defn make-path [quadtree]
(when-let [seed (pick-start quadtree)] (when-let [seed (pick-start quadtree)]
(->> (->>
(iterate (fn [[head & _ :as path]] (iterate (fn [path]
(if-let [next (next-node quadtree head)] (if-let [next (next-node quadtree path)]
(conj path next) (conj path next)
path)) path))
(list seed)) (list seed))
(partition 2) (partition 2)
(filter (fn [[a b]] (= a b))) (filter (fn [[a b]] (= a b)))
(ffirst)))) (ffirst)
(take-last max-path-length))))
(def paths (def paths
(let [qt (st/quadtree bounds)] (let [qt (st/quadtree bounds)]
@ -92,7 +102,7 @@
(doseq [path paths (doseq [path paths
{{[x y] :p r :r} :shape} path] {{[x y] :p r :r} :shape} path]
(q/ellipse x y r r)) (q/ellipse x y (* 2 r) (* 2 r)))
#_(qd/draw-scene! scene)) #_(qd/draw-scene! scene))
(when-not (resolve 'thirty-four) (when-not (resolve 'thirty-four)
@ -105,4 +115,5 @@
:setup setup :setup setup
:update identity :update identity
:draw draw-state :draw draw-state
:middleware [qm/pause-on-error #_(screenshottable) qm/fun-mode])) :middleware [qm/pause-on-error #_(screenshottable) qm/fun-mode])
)