From d484a18da543e2d93be892532e3cd81a4cabd54c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?R=C3=A9mi=20Oudin?= <oudin@crans.org>
Date: Tue, 13 Feb 2018 17:03:11 +0100
Subject: [PATCH] Add some structure for the ground.

---
 FlatGround.cpp   |  6 ++++++
 FlatGround.hpp   |  6 ++++++
 Ground.cpp       |  0
 Ground.hpp       |  8 ++++++++
 Makefile         |  3 +++
 PerlinGround.cpp |  9 +++++++++
 PerlinGround.hpp | 12 ++++++++++++
 7 files changed, 44 insertions(+)
 create mode 100644 FlatGround.cpp
 create mode 100644 FlatGround.hpp
 create mode 100644 Ground.cpp
 create mode 100644 Ground.hpp
 create mode 100644 PerlinGround.cpp
 create mode 100644 PerlinGround.hpp

diff --git a/FlatGround.cpp b/FlatGround.cpp
new file mode 100644
index 0000000..b3bf243
--- /dev/null
+++ b/FlatGround.cpp
@@ -0,0 +1,6 @@
+#include "FlatGround.hpp"
+
+
+double FlatGround::operator() (double, double) const {
+    return 0. ;
+}
diff --git a/FlatGround.hpp b/FlatGround.hpp
new file mode 100644
index 0000000..e2ee420
--- /dev/null
+++ b/FlatGround.hpp
@@ -0,0 +1,6 @@
+#pragma once
+#include "Ground.hpp"
+
+class FlatGround : public Ground {
+    double operator() (double, double) const;
+};
diff --git a/Ground.cpp b/Ground.cpp
new file mode 100644
index 0000000..e69de29
diff --git a/Ground.hpp b/Ground.hpp
new file mode 100644
index 0000000..c03f06a
--- /dev/null
+++ b/Ground.hpp
@@ -0,0 +1,8 @@
+#pragma once
+
+#include "common_structures.hpp"
+
+class Ground {
+    public:
+        virtual double operator() (double, double) const = 0;
+};
diff --git a/Makefile b/Makefile
index bb29ca1..95d1bb2 100644
--- a/Makefile
+++ b/Makefile
@@ -11,6 +11,9 @@ OBJS=Implicit.o \
 	 Mesh.o \
 	 spheroid.o \
 	 Ball.o \
+	 Ground.o \
+	 FlatGround.o \
+	 PerlinGround.o \
 	 PerlinNoise.o \
 	 util/ObjParser.o \
 	 MarchingCubes.o \
diff --git a/PerlinGround.cpp b/PerlinGround.cpp
new file mode 100644
index 0000000..081a46b
--- /dev/null
+++ b/PerlinGround.cpp
@@ -0,0 +1,9 @@
+#include "PerlinGround.hpp"
+
+PerlinGround::PerlinGround() : surface(PerlinNoise()) {}
+PerlinGround::PerlinGround(unsigned int seed) : surface(PerlinNoise(seed)) {}
+
+double PerlinGround::operator() (double x, double z) const {
+    return surface.noise(x, z);
+}
+
diff --git a/PerlinGround.hpp b/PerlinGround.hpp
new file mode 100644
index 0000000..df2add7
--- /dev/null
+++ b/PerlinGround.hpp
@@ -0,0 +1,12 @@
+#pragma once
+#include "Ground.hpp"
+#include "PerlinNoise.hpp"
+
+class PerlinGround : public Ground {
+    public:
+        PerlinGround();
+        PerlinGround(unsigned int seed);
+        double operator() (double, double) const;
+    private:
+        PerlinNoise surface;
+};