#include <osg/Depth>
#include <osg/ShadeModel>
#include <osg/Texture2D>
+#include <osg/Texture3D>
#include <osg/TexEnv>
#include <osg/Image>
+#include <simgear/scene/material/Noise.hxx>
+
using namespace osg;
namespace simgear
_depthWritesDisabled->setDataVariance(Object::STATIC);
}
+osg::Image* make3DNoiseImage(int texSize)
+{
+ osg::Image* image = new osg::Image;
+ image->setImage(texSize, texSize, texSize,
+ 4, GL_RGBA, GL_UNSIGNED_BYTE,
+ new unsigned char[4 * texSize * texSize * texSize],
+ osg::Image::USE_NEW_DELETE);
+
+ const int startFrequency = 4;
+ const int numOctaves = 4;
+
+ int f, i, j, k, inc;
+ double ni[3];
+ double inci, incj, inck;
+ int frequency = startFrequency;
+ GLubyte *ptr;
+ double amp = 0.5;
+
+ osg::notify(osg::WARN) << "creating 3D noise texture... ";
+
+ for (f = 0, inc = 0; f < numOctaves; ++f, frequency *= 2, ++inc, amp *= 0.5)
+ {
+ SetNoiseFrequency(frequency);
+ ptr = image->data();
+ ni[0] = ni[1] = ni[2] = 0;
+
+ inci = 1.0 / (texSize / frequency);
+ for (i = 0; i < texSize; ++i, ni[0] += inci)
+ {
+ incj = 1.0 / (texSize / frequency);
+ for (j = 0; j < texSize; ++j, ni[1] += incj)
+ {
+ inck = 1.0 / (texSize / frequency);
+ for (k = 0; k < texSize; ++k, ni[2] += inck, ptr += 4)
+ {
+ *(ptr+inc) = (GLubyte) (((noise3(ni) + 1.0) * amp) * 128.0);
+ }
+ }
+ }
+ }
+
+ osg::notify(osg::WARN) << "DONE" << std::endl;
+ return image;
+}
+
+osg::Texture3D* StateAttributeFactory::getNoiseTexture(int size)
+{
+ NoiseMap::iterator itr = _noises.find(size);
+ if (itr != _noises.end())
+ return itr->second.get();
+ Texture3D* noiseTexture = new osg::Texture3D;
+ noiseTexture->setFilter(osg::Texture3D::MIN_FILTER, osg::Texture3D::LINEAR);
+ noiseTexture->setFilter(osg::Texture3D::MAG_FILTER, osg::Texture3D::LINEAR);
+ noiseTexture->setWrap(osg::Texture3D::WRAP_S, osg::Texture3D::REPEAT);
+ noiseTexture->setWrap(osg::Texture3D::WRAP_T, osg::Texture3D::REPEAT);
+ noiseTexture->setWrap(osg::Texture3D::WRAP_R, osg::Texture3D::REPEAT);
+ noiseTexture->setImage( make3DNoiseImage(size) );
+ _noises.insert(std::make_pair(size, noiseTexture));
+ return noiseTexture;
+}
+
+static osg::Image* make2DNoiseNormal();
+osg::Texture2D* StateAttributeFactory::getNoiseNormalMap()
+{
+ if (_noiseNormalTexture.valid())
+ return _noiseNormalTexture.get();
+
+ _noiseNormalTexture = new osg::Texture2D;
+ _noiseNormalTexture->setFilter(osg::Texture3D::MIN_FILTER, osg::Texture3D::LINEAR);
+ _noiseNormalTexture->setFilter(osg::Texture3D::MAG_FILTER, osg::Texture3D::LINEAR);
+ _noiseNormalTexture->setWrap(osg::Texture3D::WRAP_S, osg::Texture3D::REPEAT);
+ _noiseNormalTexture->setWrap(osg::Texture3D::WRAP_T, osg::Texture3D::REPEAT);
+ _noiseNormalTexture->setImage( make2DNoiseNormal() );
+ return _noiseNormalTexture;
+}
+
// anchor the destructor into this file, to avoid ref_ptr warnings
StateAttributeFactory::~StateAttributeFactory()
{
}
+/* GIMP header image file format (RGB): */
+
+static unsigned int noiseNormalWidth = 64;
+static unsigned int noiseNormalHeight = 64;
+
+/* Call this macro repeatedly. After each use, the pixel data can be extracted */
+
+#define NOISE_NORMAL_PIXEL(data,pixel) {\
+pixel[0] = (((data[0] - 33) << 2) | ((data[1] - 33) >> 4)); \
+pixel[1] = ((((data[1] - 33) & 0xF) << 4) | ((data[2] - 33) >> 2)); \
+pixel[2] = ((((data[2] - 33) & 0x3) << 6) | ((data[3] - 33))); \
+data += 4; \
+}
+static char *noiseNormalData =
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+ "?H``@)(`@9,`A(``AXT_B8P_AHP^@8L^?X`^?X`^@8\\^@HX^@HX^@XT^A8T^AHX_"
+ "B9$`@XT^@8T_@8T_@(P^@X\\`A9,`@90`@Y8`C)(`BY$`?Y$_?H\\]B8P_BXX`@I(`"
+ ">X\\`@8X`AXX`AH``@Y$`?X\\`@X\\`B8X`CXH`B(H]@8L\\?XT\\@8T_@XH^@XH^A8P`"
+ "@YH`@9@`?Y0`?H`^?XP^@(H]@XD[AHD\\?Y(^@HX]AHX^B(``A8\\`?XP^?8H^?HL`"
+ "@HP_A9(`AI@`B)D`BI8`B90`A8`_@(P\\AXT`A8L]@XD[@8<Y@X<XA8DZB(P[BHX]"
+ "AY4`@9(`@9$`@X``A8P`B(X`B(``@XX]>Y(^B8\\`BHT`@(X]?HL]B(<^B(D_?(X`"
+ "=I$\\@Y8`C)<`AI,_?I$[?),^?Y0`A9,`CX\\`B(``A)(`A9(`AH``AXH_AX8_BH8`"
+ "A(\\ZA(\\\\@HX]@(X]?X\\`@9$`AI,`B)4`BI(`B8\\`BHT`BH``AI$`?X\\`>XH`>X<`"
+ "BXH`AX\\`@9(`?I$]?I$[@9(]@Y0`@Y0`?HX_@9(`A98`B)D`B9H`B)D`AID`A9@`"
+ "";
+
+static osg::Image* make2DNoiseNormal() {
+ osg::Image* image = new osg::Image;
+ image->setImage(noiseNormalWidth, noiseNormalHeight, 1,
+ GL_RGB8, GL_RGB, GL_UNSIGNED_BYTE,
+ new unsigned char[3 * noiseNormalWidth * noiseNormalHeight],
+ osg::Image::USE_NEW_DELETE);
+
+ char* data = noiseNormalData;
+ for (unsigned int i=0; i<noiseNormalHeight; ++i) {
+ for (unsigned int j=0; j<noiseNormalWidth; ++j) {
+ GLubyte *ptr = image->data(i,j);
+ NOISE_NORMAL_PIXEL(data,ptr);
+ }
+ }
+
+ return image;
+}
}