From ff74da1c03e1fb428da849a42625574351f03536 Mon Sep 17 00:00:00 2001
From: Andreas Ortmann <ortmann@finf.uni-hannover.de>
Date: Wed, 28 Sep 2016 15:33:35 +0200
Subject: [PATCH] rockets rotate in their direction now.

---
 game/renderer_polygon_3d/renderer_polygon_3d.cpp | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/game/renderer_polygon_3d/renderer_polygon_3d.cpp b/game/renderer_polygon_3d/renderer_polygon_3d.cpp
index 7f54c85..0d781f7 100644
--- a/game/renderer_polygon_3d/renderer_polygon_3d.cpp
+++ b/game/renderer_polygon_3d/renderer_polygon_3d.cpp
@@ -2,8 +2,9 @@
 
 #include <iostream>
 
-#include "glm/gtc/type_ptr.hpp"
+#include <glm/gtc/type_ptr.hpp>
 #include <glm/gtc/matrix_transform.hpp>
+#include <glm/gtx/euler_angles.hpp>
 
 #include "polygon_model.hpp"
 
@@ -130,8 +131,10 @@ namespace endofthejedi {
 
                 glm::mat4 model(1.0f);
 
-                static float a = 0.0;
-                a += 2.0*M_PI * 0.01;
+                //static float a = 0.0;
+                //a += 2.0*M_PI * 0.01;
+                glm::vec2 vn = glm::normalize(missile->velocity);
+                float a = std::atan2((float) vn.y, (float) vn.x);
 
                 model = glm::rotate(model, a, glm::vec3(0.0f, 0.0f, 1.0f));