From 2c0ff620e9ade00d4fa7d0bc3e4c3070d61a8815 Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Sat, 14 Sep 2019 20:52:55 +0200
Subject: Move wireframe generation into geometry

---
 ldc_3d_gl_interop.py | 29 ++++++++---------------------
 simulation.py        | 17 +++++++++++++++++
 2 files changed, 25 insertions(+), 21 deletions(-)

diff --git a/ldc_3d_gl_interop.py b/ldc_3d_gl_interop.py
index 3aeaf50..4065881 100644
--- a/ldc_3d_gl_interop.py
+++ b/ldc_3d_gl_interop.py
@@ -15,7 +15,7 @@ from OpenGL.GL import shaders
 from pyrr import matrix44, quaternion
 
 lattice_x = 64
-lattice_y = 64
+lattice_y = 96
 lattice_z = 64
 
 updates_per_frame = 20
@@ -183,6 +183,8 @@ particles = Particles(
 
 rotation = Rotation([-lattice_x/2, -lattice_y/2, -lattice_z/2])
 
+cube_vertices, cube_edges = lattice.geometry.wireframe()
+
 def on_display():
     for i in range(0,updates_per_frame):
         lattice.evolve()
@@ -203,6 +205,7 @@ def on_display():
     glUniformMatrix4fv(projection_id, 1, False, numpy.ascontiguousarray(projection))
     glUniformMatrix4fv(rotation_id, 1, False, numpy.ascontiguousarray(rotation.get()))
     glVertexPointer(4, GL_FLOAT, 0, particles.gl_particles)
+    glEnable(GL_POINT_SMOOTH)
     glPointSize(point_size)
     glDrawArrays(GL_POINTS, 0, particles.count)
 
@@ -210,27 +213,11 @@ def on_display():
     glUniformMatrix4fv(projection_id, 1, False, numpy.ascontiguousarray(projection))
     glUniformMatrix4fv(rotation_id, 1, False, numpy.ascontiguousarray(rotation.get()))
     glPolygonMode(GL_FRONT_AND_BACK, GL_LINE)
-    glBegin(GL_POLYGON)
-    glVertex3f(0,0,0)
-    glVertex3f(lattice_x,0,0)
-    glVertex3f(lattice_x,lattice_y,0)
-    glVertex3f(0,lattice_y,0)
-    glEnd()
-    glBegin(GL_POLYGON)
-    glVertex3f(0,0,lattice_z)
-    glVertex3f(lattice_x,0,lattice_z)
-    glVertex3f(lattice_x,lattice_y,lattice_z)
-    glVertex3f(0,lattice_y,lattice_z)
-    glEnd()
+    glLineWidth(2*point_size)
     glBegin(GL_LINES)
-    glVertex3f(0,0,0)
-    glVertex3f(0,0,lattice_z)
-    glVertex3f(lattice_x,0,0)
-    glVertex3f(lattice_x,0,lattice_z)
-    glVertex3f(lattice_x,lattice_y,0)
-    glVertex3f(lattice_x,lattice_y,lattice_z)
-    glVertex3f(0,lattice_y,0)
-    glVertex3f(0,lattice_y,lattice_z)
+    for i, j in cube_edges:
+        glVertex3fv(cube_vertices[i])
+        glVertex3fv(cube_vertices[j])
     glEnd()
 
     glutSwapBuffers()
diff --git a/simulation.py b/simulation.py
index 13fa962..7ddeb45 100644
--- a/simulation.py
+++ b/simulation.py
@@ -36,6 +36,23 @@ class Geometry:
         else:
             return (self.size_x-2, self.size_y-2, self.size_z-2)
 
+    def wireframe(self):
+        return ([
+            [0          , 0          , 0          ],
+            [self.size_x, 0          , 0          ],
+            [self.size_x, self.size_y, 0          ],
+            [0          , self.size_y, 0          ],
+            [0          , 0          , self.size_z],
+            [self.size_x, 0          , self.size_z],
+            [self.size_x, self.size_y, self.size_z],
+            [0          , self.size_y, self.size_z]
+        ],
+        [
+            (0,1), (1,2), (2,3), (3,0),
+            (4,5), (5,6), (6,7), (7,4),
+            (0,4), (1,5), (2,6), (3,7)
+        ])
+
 def pad(n, m):
     return (n // m + min(1,n % m)) * m
 
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