From 66d6d89aebd810d86ae2a1a3f57ab0eed27107be Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Th=C3=A9ophile=20Bastian?= <contact@tobast.fr>
Date: Tue, 6 Feb 2018 21:26:18 +0100
Subject: [PATCH] Randomizing face colour for each face

Allows to easily identify each face.
---
 render/GlutRender.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/render/GlutRender.cpp b/render/GlutRender.cpp
index 7107b30..28a4d74 100644
--- a/render/GlutRender.cpp
+++ b/render/GlutRender.cpp
@@ -3,6 +3,8 @@
 #include <GL/gl.h>
 #include <GL/glut.h>
 #include <cstring>
+#include <random>
+#include <ctime>
 
 GlutRender& GlutRender::get_instance() {
     static GlutRender instance;
@@ -67,6 +69,10 @@ void GlutRender::display() {
     glLoadIdentity();
     glTranslatef(0., 0., -6.);
 
+    std::default_random_engine rand_engine(time(NULL));
+    std::uniform_real_distribution<double> distribution;
+    auto rand_color = std::bind(distribution, rand_engine);
+
     for(Mesh* mesh: meshes) {
         const Point& mesh_center = mesh->get_center();
 
@@ -77,7 +83,7 @@ void GlutRender::display() {
             Point p0 = face.pt(0, points) + mesh_center,
                   p1 = face.pt(1, points) + mesh_center,
                   p2 = face.pt(2, points) + mesh_center;
-            glColor3f(1.0f, 1.0f, 0.0f);
+            glColor3f(rand_color(), rand_color(), rand_color());
             glVertex3f(p0[0], p0[1], p0[2]);
             glVertex3f(p1[0], p1[1], p1[2]);
             glVertex3f(p2[0], p2[1], p2[2]);