From acebf489b7a24781402728da85437b3de6c9cd4d Mon Sep 17 00:00:00 2001
From: Mo8it <mo8it@protonmail.com>
Date: Thu, 27 Jan 2022 17:07:24 +0100
Subject: [PATCH] Added periodic boundary conditions graphics

---
 graphics/periodic_boundary_conditions.jl | 115 +++++++++++++++++++++++
 graphics/verlet_and_cell_lists.jl        |   4 +-
 2 files changed, 116 insertions(+), 3 deletions(-)
 create mode 100644 graphics/periodic_boundary_conditions.jl

diff --git a/graphics/periodic_boundary_conditions.jl b/graphics/periodic_boundary_conditions.jl
new file mode 100644
index 0000000..bf65a57
--- /dev/null
+++ b/graphics/periodic_boundary_conditions.jl
@@ -0,0 +1,115 @@
+using Luxor
+using Random: Random
+using StaticArrays: SVector
+
+using ReCo: ReCo
+
+function gen_periodic_boundary_conditions_graphics()
+    Random.seed!(23)
+
+    drwaing_box_length = 300
+
+    graphics_export_dir = "exports/graphics"
+    mkpath(graphics_export_dir)
+
+    Drawing(
+        drwaing_box_length,
+        drwaing_box_length,
+        "$graphics_export_dir/periodic_boundary_conditions.pdf",
+    )
+    origin()
+
+    particle_radius = 10
+    box_len = drwaing_box_length / 3
+    half_box_len = box_len / 2
+
+    N_in_one_box = 5
+
+    colors = ["red", "blue", "orange", "green", "cyan"]
+
+    distance_limit = 0.99 * 2 * particle_radius
+
+    particles = Vector{ReCo.Particle}(undef, 9 * N_in_one_box)
+    translation_vecs = [
+        SVector(0.0, 0.0),
+        SVector(box_len, 0.0),
+        SVector(box_len, box_len),
+        SVector(0.0, box_len),
+        SVector(-box_len, box_len),
+        SVector(-box_len, 0.0),
+        SVector(-box_len, -box_len),
+        SVector(0.0, -box_len),
+        SVector(box_len, -box_len),
+    ]
+
+    p1_c = SVector(0.0, 0.0)
+
+    for p1_ind in 1:N_in_one_box
+        while true
+            x = (rand() - 0.5) * (box_len - 2 * particle_radius)
+            y = (rand() - 0.5) * (box_len - 2 * particle_radius)
+
+            p1_c = SVector(x, y)
+
+            no_collision = true
+
+            for p2_ind in 1:(p1_ind - 1)
+                if ReCo.norm2d(p1_c - particles[p2_ind].c) < distance_limit
+                    no_collision = false
+
+                    break
+                end
+            end
+
+            if no_collision
+                break
+            end
+        end
+
+        setcolor(colors[p1_ind])
+        for box_ind in 1:9
+            c = p1_c + translation_vecs[box_ind]
+            particle = ReCo.Particle(0, c, 0.0)
+            particles[p1_ind * box_ind] = particle
+            circle(c[1], c[2], particle_radius, :fill)
+        end
+    end
+
+    setcolor("black")
+    setline(1.0)
+    for sign in (1, -1)
+        line(
+            Point(sign * drwaing_box_length / 6, drwaing_box_length / 2),
+            Point(sign * drwaing_box_length / 6, -drwaing_box_length / 2),
+            :stroke,
+        )
+        line(
+            Point(drwaing_box_length / 2, sign * drwaing_box_length / 6),
+            Point(-drwaing_box_length / 2, sign * drwaing_box_length / 6),
+            :stroke,
+        )
+    end
+
+    p1_ind = 3
+    p2_ind = 5
+
+    p1_c = particles[p1_ind].c
+    p2_c = particles[p2_ind].c
+    normal_vec_form_p1_to_p2 = p2_c - p1_c
+    min_image_vec = ReCo.minimum_image(normal_vec_form_p1_to_p2, half_box_len)
+    min_image_vec_from_p1 = p1_c + min_image_vec
+
+    setcolor("black")
+    arrow(Point(p1_c[1], p1_c[2]), Point(p2_c[1], p2_c[2]); linewidth=2.0)
+
+    setcolor("red")
+    arrow(
+        Point(p1_c[1], p1_c[2]),
+        Point(min_image_vec_from_p1[1], min_image_vec_from_p1[2]);
+        linewidth=2.0,
+    )
+
+    finish()
+
+    return nothing
+end
diff --git a/graphics/verlet_and_cell_lists.jl b/graphics/verlet_and_cell_lists.jl
index 61d80df..8ed2f8a 100644
--- a/graphics/verlet_and_cell_lists.jl
+++ b/graphics/verlet_and_cell_lists.jl
@@ -93,6 +93,4 @@ function gen_verlet_and_cell_lists_graphics()
     finish()
 
     return nothing
-end
-
-# TODO: Deduplicate with radial_distribution.jl
\ No newline at end of file
+end
\ No newline at end of file