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-rw-r--r--SConstruct4
-rw-r--r--heightmap.pngbin354784 -> 0 bytes
-rw-r--r--noiseutils/COPYING.txt504
-rw-r--r--noiseutils/noiseutils.cpp1298
-rw-r--r--noiseutils/noiseutils.h2540
-rw-r--r--noiseutils/readme.txt4
-rw-r--r--noiseutils/warnings.diff56
-rw-r--r--scene.cpp17
-rw-r--r--terrain.cpp32
-rw-r--r--terrain.h9
10 files changed, 4450 insertions, 14 deletions
diff --git a/SConstruct b/SConstruct
index c046bb5..0c5f2b6 100644
--- a/SConstruct
+++ b/SConstruct
@@ -8,7 +8,7 @@ AddOption('--release', action = 'store_true')
AddOption('--profiling', action = 'store_true')
env.Append(CPPPATH = ['.'])
-env.Append(LIBS = ['GL', 'GLU'])
+env.Append(LIBS = ['GL', 'GLU', 'noise'])
env.ParseConfig('sdl-config --cflags --libs')
env.ParseConfig('pkg-config --cflags --libs SDL_image')
env.ParseConfig('pkg-config --cflags --libs ftgl')
@@ -24,6 +24,6 @@ if GetOption('profiling'):
Export('env')
-env.Program('foo', Glob('*.cpp'))
+env.Program('foo', Glob('*.cpp') + ['noiseutils/noiseutils.cpp'])
# vim: syn=python
diff --git a/heightmap.png b/heightmap.png
deleted file mode 100644
index 2333514..0000000
--- a/heightmap.png
+++ /dev/null
Binary files differ
diff --git a/noiseutils/COPYING.txt b/noiseutils/COPYING.txt
new file mode 100644
index 0000000..cbee875
--- /dev/null
+++ b/noiseutils/COPYING.txt
@@ -0,0 +1,504 @@
+ GNU LESSER GENERAL PUBLIC LICENSE
+ Version 2.1, February 1999
+
+ Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+ 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ Everyone is permitted to copy and distribute verbatim copies
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diff --git a/noiseutils/noiseutils.cpp b/noiseutils/noiseutils.cpp
new file mode 100644
index 0000000..ddcac1b
--- /dev/null
+++ b/noiseutils/noiseutils.cpp
@@ -0,0 +1,1298 @@
+// noiseutils.cpp
+//
+// Copyright (C) 2003-2005 Jason Bevins
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation; either version 2.1 of the License, or (at
+// your option) any later version.
+//
+// This library is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
+// License (COPYING.txt) for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this library; if not, write to the Free Software Foundation,
+// Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+//
+// The developer's email is jlbezigvins@gmzigail.com (for great email, take
+// off every 'zig'.)
+//
+
+#include <fstream>
+
+#include <noise/interp.h>
+#include <noise/mathconsts.h>
+
+#include "noiseutils.h"
+
+using namespace noise;
+using namespace noise::model;
+using namespace noise::module;
+
+// Bitmap header size.
+const int BMP_HEADER_SIZE = 54;
+
+// Direction of the light source, in compass degrees (0 = north, 90 = east,
+// 180 = south, 270 = east)
+const double DEFAULT_LIGHT_AZIMUTH = 45.0;
+
+// Amount of contrast between light and dark areas.
+const double DEFAULT_LIGHT_CONTRAST = 1.0;
+
+// Elevation of the light source above the horizon, in degrees (0 = on
+// horizon, 90 = directly overhead)
+const double DEFAULT_LIGHT_ELEVATION = 45.0;
+
+//////////////////////////////////////////////////////////////////////////////
+// Miscellaneous functions
+
+namespace noise
+{
+
+ namespace utils
+ {
+
+ // Performs linear interpolation between two 8-bit channel values.
+ inline noise::uint8 BlendChannel (const uint8 channel0,
+ const uint8 channel1, float alpha)
+ {
+ float c0 = (float)channel0 / 255.0;
+ float c1 = (float)channel1 / 255.0;
+ return (noise::uint8)(((c1 * alpha) + (c0 * (1.0f - alpha))) * 255.0f);
+ }
+
+ // Performs linear interpolation between two colors and stores the result
+ // in out.
+ inline void LinearInterpColor (const Color& color0, const Color& color1,
+ float alpha, Color& out)
+ {
+ out.alpha = BlendChannel (color0.alpha, color1.alpha, alpha);
+ out.blue = BlendChannel (color0.blue , color1.blue , alpha);
+ out.green = BlendChannel (color0.green, color1.green, alpha);
+ out.red = BlendChannel (color0.red , color1.red , alpha);
+ }
+
+ // Unpacks a floating-point value into four bytes. This function is
+ // specific to Intel machines. A portable version will come soon (I
+ // hope.)
+ inline noise::uint8* UnpackFloat (noise::uint8* bytes, float value)
+ {
+ noise::uint8* pBytes = (noise::uint8*)(&value);
+ bytes[0] = *pBytes++;
+ bytes[1] = *pBytes++;
+ bytes[2] = *pBytes++;
+ bytes[3] = *pBytes++;
+ return bytes;
+ }
+
+ // Unpacks a 16-bit integer value into two bytes in little endian format.
+ inline noise::uint8* UnpackLittle16 (noise::uint8* bytes,
+ noise::uint16 integer)
+ {
+ bytes[0] = (noise::uint8)((integer & 0x00ff) );
+ bytes[1] = (noise::uint8)((integer & 0xff00) >> 8 );
+ return bytes;
+ }
+
+ // Unpacks a 32-bit integer value into four bytes in little endian format.
+ inline noise::uint8* UnpackLittle32 (noise::uint8* bytes,
+ noise::uint32 integer)
+ {
+ bytes[0] = (noise::uint8)((integer & 0x000000ff) );
+ bytes[1] = (noise::uint8)((integer & 0x0000ff00) >> 8 );
+ bytes[2] = (noise::uint8)((integer & 0x00ff0000) >> 16);
+ bytes[3] = (noise::uint8)((integer & 0xff000000) >> 24);
+ return bytes;
+ }
+
+ }
+
+}
+
+using namespace noise;
+
+using namespace noise::utils;
+
+//////////////////////////////////////////////////////////////////////////////
+// GradientColor class
+
+GradientColor::GradientColor ()
+{
+ m_pGradientPoints = NULL;
+}
+
+GradientColor::~GradientColor ()
+{
+ delete[] m_pGradientPoints;
+}
+
+void GradientColor::AddGradientPoint (double gradientPos,
+ const Color& gradientColor)
+{
+ // Find the insertion point for the new gradient point and insert the new
+ // gradient point at that insertion point. The gradient point array will
+ // remain sorted by gradient position.
+ int insertionPos = FindInsertionPos (gradientPos);
+ InsertAtPos (insertionPos, gradientPos, gradientColor);
+}
+
+void GradientColor::Clear ()
+{
+ delete[] m_pGradientPoints;
+ m_pGradientPoints = NULL;
+ m_gradientPointCount = 0;
+}
+
+int GradientColor::FindInsertionPos (double gradientPos)
+{
+ int insertionPos;
+ for (insertionPos = 0; insertionPos < m_gradientPointCount;
+ insertionPos++) {
+ if (gradientPos < m_pGradientPoints[insertionPos].pos) {
+ // We found the array index in which to insert the new gradient point.
+ // Exit now.
+ break;
+ } else if (gradientPos == m_pGradientPoints[insertionPos].pos) {
+ // Each gradient point is required to contain a unique gradient
+ // position, so throw an exception.
+ throw noise::ExceptionInvalidParam ();
+ }
+ }
+ return insertionPos;
+}
+
+const Color& GradientColor::GetColor (double gradientPos) const
+{
+ assert (m_gradientPointCount >= 2);
+
+ // Find the first element in the gradient point array that has a gradient
+ // position larger than the gradient position passed to this method.
+ int indexPos;
+ for (indexPos = 0; indexPos < m_gradientPointCount; indexPos++) {
+ if (gradientPos < m_pGradientPoints[indexPos].pos) {
+ break;
+ }
+ }
+
+ // Find the two nearest gradient points so that we can perform linear
+ // interpolation on the color.
+ int index0 = ClampValue (indexPos - 1, 0, m_gradientPointCount - 1);
+ int index1 = ClampValue (indexPos , 0, m_gradientPointCount - 1);
+
+ // If some gradient points are missing (which occurs if the gradient
+ // position passed to this method is greater than the largest gradient
+ // position or less than the smallest gradient position in the array), get
+ // the corresponding gradient color of the nearest gradient point and exit
+ // now.
+ if (index0 == index1) {
+ m_workingColor = m_pGradientPoints[index1].color;
+ return m_workingColor;
+ }
+
+ // Compute the alpha value used for linear interpolation.
+ double input0 = m_pGradientPoints[index0].pos;
+ double input1 = m_pGradientPoints[index1].pos;
+ double alpha = (gradientPos - input0) / (input1 - input0);
+
+ // Now perform the linear interpolation given the alpha value.
+ const Color& color0 = m_pGradientPoints[index0].color;
+ const Color& color1 = m_pGradientPoints[index1].color;
+ LinearInterpColor (color0, color1, (float)alpha, m_workingColor);
+ return m_workingColor;
+}
+
+void GradientColor::InsertAtPos (int insertionPos, double gradientPos,
+ const Color& gradientColor)
+{
+ // Make room for the new gradient point at the specified insertion position
+ // within the gradient point array. The insertion position is determined by
+ // the gradient point's position; the gradient points must be sorted by
+ // gradient position within that array.
+ GradientPoint* newGradientPoints;
+ newGradientPoints = new GradientPoint[m_gradientPointCount + 1];
+ for (int i = 0; i < m_gradientPointCount; i++) {
+ if (i < insertionPos) {
+ newGradientPoints[i] = m_pGradientPoints[i];
+ } else {
+ newGradientPoints[i + 1] = m_pGradientPoints[i];
+ }
+ }
+ delete[] m_pGradientPoints;
+ m_pGradientPoints = newGradientPoints;
+ ++m_gradientPointCount;
+
+ // Now that we've made room for the new gradient point within the array, add
+ // the new gradient point.
+ m_pGradientPoints[insertionPos].pos = gradientPos ;
+ m_pGradientPoints[insertionPos].color = gradientColor;
+}
+
+//////////////////////////////////////////////////////////////////////////////
+// NoiseMap class
+
+NoiseMap::NoiseMap ()
+{
+ InitObj ();
+}
+
+NoiseMap::NoiseMap (int width, int height)
+{
+ InitObj ();
+ SetSize (width, height);
+}
+
+NoiseMap::NoiseMap (const NoiseMap& rhs)
+{
+ InitObj ();
+ CopyNoiseMap (rhs);
+}
+
+NoiseMap::~NoiseMap ()
+{
+ delete[] m_pNoiseMap;
+}
+
+NoiseMap& NoiseMap::operator= (const NoiseMap& rhs)
+{
+ CopyNoiseMap (rhs);
+
+ return *this;
+}
+
+void NoiseMap::Clear (float value)
+{
+ if (m_pNoiseMap != NULL) {
+ for (int y = 0; y < m_height; y++) {
+ float* pDest = GetSlabPtr (0, y);
+ for (int x = 0; x < m_width; x++) {
+ *pDest++ = value;
+ }
+ }
+ }
+}
+
+void NoiseMap::CopyNoiseMap (const NoiseMap& source)
+{
+ // Resize the noise map buffer, then copy the slabs from the source noise
+ // map buffer to this noise map buffer.
+ SetSize (source.GetWidth (), source.GetHeight ());
+ for (int y = 0; y < source.GetHeight (); y++) {
+ const float* pSource = source.GetConstSlabPtr (0, y);
+ float* pDest = GetSlabPtr (0, y);
+ memcpy (pDest, pSource, (size_t)source.GetWidth () * sizeof (float));
+ }
+
+ // Copy the border value as well.
+ m_borderValue = source.m_borderValue;
+}
+
+void NoiseMap::DeleteNoiseMapAndReset ()
+{
+ delete[] m_pNoiseMap;
+ InitObj ();
+}
+
+float NoiseMap::GetValue (int x, int y) const
+{
+ if (m_pNoiseMap != NULL) {
+ if (x >= 0 && x < m_width && y >= 0 && y < m_height) {
+ return *(GetConstSlabPtr (x, y));
+ }
+ }
+ // The coordinates specified are outside the noise map. Return the border
+ // value.
+ return m_borderValue;
+}
+
+void NoiseMap::InitObj ()
+{
+ m_pNoiseMap = NULL;
+ m_height = 0;