From 31e7aa23c4e95b5e37f33938e9bb47ea82a3f4d9 Mon Sep 17 00:00:00 2001
From: Alexander Schmidt <alex@treefish.org>
Date: Fri, 15 Jul 2016 12:58:31 +0200
Subject: [PATCH] Replaced sea and surface refs with shared pointers

---
 sea.cpp           | 10 ++++++----
 sea.h             |  8 +++++---
 seafwd.h          |  6 ++++++
 seamulator.cpp    | 21 ++++++++++++---------
 watersurface.h    |  2 ++
 watersurfacefwd.h |  6 ++++++
 6 files changed, 37 insertions(+), 16 deletions(-)
 create mode 100644 seafwd.h
 create mode 100644 watersurfacefwd.h

diff --git a/sea.cpp b/sea.cpp
index 37a6cd6..42772d4 100644
--- a/sea.cpp
+++ b/sea.cpp
@@ -2,15 +2,17 @@
 
 #include <cstdlib>
 
-Sea::Sea(WaterSurface& surface) : m_surface{surface}
+#include "watersurface.h"
+
+Sea::Sea(WaterSurfacePtr surface) : m_surface{surface}
 {
 }
 
 void Sea::update()
 {
-  for (int y = 0; y < m_surface.size(); ++y) {
-    for (int x = 0; x < m_surface.size(); ++x) {
-      m_surface.at(x, y)
+  for (int y = 0; y < m_surface->size(); ++y) {
+    for (int x = 0; x < m_surface->size(); ++x) {
+      m_surface->at(x, y)
 	.setHeight(((double)std::rand()/(double)RAND_MAX));
     }
   }
diff --git a/sea.h b/sea.h
index 6a9cd0a..48307ee 100644
--- a/sea.h
+++ b/sea.h
@@ -1,13 +1,15 @@
 #pragma once
 
-#include "watersurface.h"
+#include "seafwd.h"
+
+#include "watersurfacefwd.h"
 
 class Sea
 {
  public:
-  Sea(WaterSurface& surface);
+  Sea(WaterSurfacePtr surface);
   void update();
 
  private:
-  WaterSurface& m_surface;
+  WaterSurfacePtr m_surface;
 };
diff --git a/seafwd.h b/seafwd.h
new file mode 100644
index 0000000..22977d7
--- /dev/null
+++ b/seafwd.h
@@ -0,0 +1,6 @@
+#pragma once
+
+#include <memory>
+
+class Sea;
+using SeaPtr = std::shared_ptr<Sea>;
diff --git a/seamulator.cpp b/seamulator.cpp
index 6bb51c9..b6739b5 100644
--- a/seamulator.cpp
+++ b/seamulator.cpp
@@ -8,20 +8,20 @@
 const int LATTICE_SIZE = 10;
 const int LATTICE_UNIT = 1;
 
-WaterSurface surface(LATTICE_SIZE);
-Sea sea(surface);
+SeaPtr sea;
+WaterSurfacePtr surface;
 
 void drawSingleTile(int x, int y)
 {
   glBegin(GL_TRIANGLES);
 
-  glVertex3f(x, y, surface.at(x, y).getHeight());
-  glVertex3f(x+1, y, surface.at(x+1, y).getHeight());
-  glVertex3f(x+1, y+1, surface.at(x+1, y+1).getHeight());
+  glVertex3f(x, y, surface->at(x, y).getHeight());
+  glVertex3f(x+1, y, surface->at(x+1, y).getHeight());
+  glVertex3f(x+1, y+1, surface->at(x+1, y+1).getHeight());
 
-  glVertex3f(x, y, surface.at(x, y).getHeight());
-  glVertex3f(x, y+1, surface.at(x, y+1).getHeight());
-  glVertex3f(x+1, y+1, surface.at(x+1, y+1).getHeight());
+  glVertex3f(x, y, surface->at(x, y).getHeight());
+  glVertex3f(x, y+1, surface->at(x, y+1).getHeight());
+  glVertex3f(x+1, y+1, surface->at(x+1, y+1).getHeight());
 
   glEnd();
 }
@@ -37,7 +37,7 @@ void displayMe(void)
 
   glClear(GL_COLOR_BUFFER_BIT);
 
-  sea.update();
+  sea->update();
 
   glScalef(LATTICE_UNIT, LATTICE_UNIT, 1.0f);
   glTranslatef(-(float)(LATTICE_SIZE-1)/2, -(float)(LATTICE_SIZE-1)/2, 0);
@@ -56,6 +56,9 @@ int main(int argc, char** argv)
 {
   std::srand(std::time(0));
 
+  surface = std::make_shared<WaterSurface>(LATTICE_SIZE);
+  sea = std::make_shared<Sea>(surface);
+
   glutInit(&argc, argv);
   glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB|GLUT_DEPTH);
   glEnable(GL_DEPTH_TEST);
diff --git a/watersurface.h b/watersurface.h
index bb0c77a..cf5829e 100644
--- a/watersurface.h
+++ b/watersurface.h
@@ -1,5 +1,7 @@
 #pragma once
 
+#include "watersurfacefwd.h"
+
 #include <vector>
 
 #include "surfacepoint.h"
diff --git a/watersurfacefwd.h b/watersurfacefwd.h
new file mode 100644
index 0000000..efb7fe3
--- /dev/null
+++ b/watersurfacefwd.h
@@ -0,0 +1,6 @@
+#pragma once
+
+#include <memory>
+
+class WaterSurface;
+using WaterSurfacePtr = std::shared_ptr<WaterSurface>;
-- 
2.39.5