From f0eb6a7b101afba52f33c5286e15a862ee68c64e Mon Sep 17 00:00:00 2001
From: Jon Bergli Heier <snakebite@jvnv.net>
Date: Sat, 7 May 2011 16:06:08 +0200
Subject: Replace static heightmap with perlin noise using libnoise and
 noiseutils.

---
 terrain.cpp | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 terrain.cpp

(limited to 'terrain.cpp')

diff --git a/terrain.cpp b/terrain.cpp
new file mode 100644
index 0000000..a44d0d3
--- /dev/null
+++ b/terrain.cpp
@@ -0,0 +1,32 @@
+#include "terrain.h"
+
+#include <noise/noise.h>
+#include "noiseutils/noiseutils.h"
+
+#include <iostream>
+
+using namespace noise;
+
+float *Terrain::generate_heights(int x, int y, int width, int height) {
+	module::Perlin mod;
+	mod.SetSeed(0);
+
+	utils::NoiseMap heightmap;
+	utils::NoiseMapBuilderPlane heightmap_builder;
+
+	heightmap_builder.SetSourceModule(mod);
+	heightmap_builder.SetDestNoiseMap(heightmap);
+
+	heightmap_builder.SetDestSize(width, height);
+	heightmap_builder.SetBounds(x / 100, (x+width) / 100, y / 100, (y+height) / 100);
+	heightmap_builder.Build();
+
+	float *heights = new float[width*height];
+	for(int i = 0; i < width; i++) {
+		for(int j = 0; j < height; j++) {
+			heights[i*height + j] = 10*(1+heightmap.GetValue(i, j));
+		}
+	}
+
+	return heights;
+}
-- 
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