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authorclick <none@none>2010-06-08 08:04:26 +0200
committerclick <none@none>2010-06-08 08:04:26 +0200
commitf867f6d7a8f728e163ba785f2da45ec97fa8ba53 (patch)
treef4f099c515cbf27dac85b9ad6972fdc8f1e12fef /externals/g3dlite/g3dmath.cpp
parentc08a7d6348a06d3b84d9a2c620a903d832199dd9 (diff)
Get g3dlib, zlib and jemalloc to build again
--HG-- branch : trunk rename : opt/cleanup/tab2spaces.sh => contrib/cleanup/tab2spaces.sh rename : opt/cleanup/whitespace.sh => contrib/cleanup/whitespace.sh rename : opt/conf_merge/README => contrib/conf_merge/README rename : opt/conf_merge/index.php => contrib/conf_merge/index.php rename : opt/conf_merge/merge.php => contrib/conf_merge/merge.php rename : doc/AuctionHouseBot.txt => docs/AuctionHouseBot.txt rename : doc/DocStructure.dox => docs/DocStructure.dox rename : doc/Doxyfile.in => docs/Doxyfile.in rename : doc/EventAI.txt => docs/EventAI.txt rename : doc/HowToScript.txt => docs/HowToScript.txt rename : doc/TextTables.txt => docs/TextTables.txt rename : doc/UnixInstall.txt => docs/UnixInstall.txt rename : externals/jemalloc/include/internal/arena.h => externals/jemalloc/jemalloc/internal/arena.h rename : externals/jemalloc/include/internal/base.h => externals/jemalloc/jemalloc/internal/base.h rename : externals/jemalloc/include/internal/chunk.h => externals/jemalloc/jemalloc/internal/chunk.h rename : externals/jemalloc/include/internal/chunk_dss.h => externals/jemalloc/jemalloc/internal/chunk_dss.h rename : externals/jemalloc/include/internal/chunk_mmap.h => externals/jemalloc/jemalloc/internal/chunk_mmap.h rename : externals/jemalloc/include/internal/chunk_swap.h => externals/jemalloc/jemalloc/internal/chunk_swap.h rename : externals/jemalloc/include/internal/ckh.h => externals/jemalloc/jemalloc/internal/ckh.h rename : externals/jemalloc/include/internal/ctl.h => externals/jemalloc/jemalloc/internal/ctl.h rename : externals/jemalloc/include/internal/extent.h => externals/jemalloc/jemalloc/internal/extent.h rename : externals/jemalloc/include/internal/hash.h => externals/jemalloc/jemalloc/internal/hash.h rename : externals/jemalloc/include/internal/huge.h => externals/jemalloc/jemalloc/internal/huge.h rename : externals/jemalloc/include/internal/jemalloc_internal.h => externals/jemalloc/jemalloc/internal/jemalloc_internal.h rename : externals/jemalloc/include/internal/jemalloc_internal.h.in => externals/jemalloc/jemalloc/internal/jemalloc_internal.h.in rename : externals/jemalloc/include/internal/mb.h => externals/jemalloc/jemalloc/internal/mb.h rename : externals/jemalloc/include/internal/mutex.h => externals/jemalloc/jemalloc/internal/mutex.h rename : externals/jemalloc/include/internal/prof.h => externals/jemalloc/jemalloc/internal/prof.h rename : externals/jemalloc/include/internal/ql.h => externals/jemalloc/jemalloc/internal/ql.h rename : externals/jemalloc/include/internal/qr.h => externals/jemalloc/jemalloc/internal/qr.h rename : externals/jemalloc/include/internal/rb.h => externals/jemalloc/jemalloc/internal/rb.h rename : externals/jemalloc/include/internal/stats.h => externals/jemalloc/jemalloc/internal/stats.h rename : externals/jemalloc/include/internal/tcache.h => externals/jemalloc/jemalloc/internal/tcache.h rename : externals/jemalloc/include/internal/totally_not_p_r_n.h => externals/jemalloc/jemalloc/internal/totally_not_p_r_n.h rename : externals/jemalloc/include/jemalloc.h => externals/jemalloc/jemalloc/jemalloc.h rename : externals/jemalloc/include/jemalloc.h.in => externals/jemalloc/jemalloc/jemalloc.h.in rename : externals/jemalloc/include/jemalloc_defs.h => externals/jemalloc/jemalloc/jemalloc_defs.h rename : externals/jemalloc/include/jemalloc_defs.h.in => externals/jemalloc/jemalloc/jemalloc_defs.h.in
Diffstat (limited to 'externals/g3dlite/g3dmath.cpp')
-rw-r--r--externals/g3dlite/g3dmath.cpp108
1 files changed, 108 insertions, 0 deletions
diff --git a/externals/g3dlite/g3dmath.cpp b/externals/g3dlite/g3dmath.cpp
new file mode 100644
index 00000000000..ad85e9efb9b
--- /dev/null
+++ b/externals/g3dlite/g3dmath.cpp
@@ -0,0 +1,108 @@
+/**
+ @file g3dmath.cpp
+
+ @author Morgan McGuire, graphics3d.com
+
+ @created 2001-06-02
+ @edited 2004-02-24
+ */
+
+#include "G3D/g3dmath.h"
+#include <cstdlib>
+#include <cstring>
+
+namespace G3D {
+
+float gaussRandom(float mean, float stdev) {
+
+ // Using Box-Mueller method from http://www.taygeta.com/random/gaussian.html
+ // Modified to specify standard deviation and mean of distribution
+ float w, x1, x2;
+
+ // Loop until w is less than 1 so that log(w) is negative
+ do {
+ x1 = uniformRandom(-1.0, 1.0);
+ x2 = uniformRandom(-1.0, 1.0);
+
+ w = float(square(x1) + square(x2));
+ } while (w > 1.0f);
+
+ // Transform to gassian distribution
+ // Multiply by sigma (stdev ^ 2) and add mean.
+ return x2 * (float)square(stdev) * sqrtf((-2.0f * logf(w) ) / w) + mean;
+}
+
+/**
+ This value should not be tested against directly, instead
+ G3D::isNan() and G3D::isFinite() will return reliable results. */
+double inf() {
+ return std::numeric_limits<double>::infinity();
+}
+
+bool isNaN(float x) {
+ static const float n = nan();
+ return memcmp(&x, &n, sizeof(float)) == 0;
+}
+
+bool isNaN(double x) {
+ static const double n = nan();
+ return memcmp(&x, &n, sizeof(double)) == 0;
+}
+
+
+/**
+ This value should not be tested against directly, instead
+ G3D::isNan() and G3D::isFinite() will return reliable results. */
+float finf() {
+ return std::numeric_limits<float>::infinity();
+}
+
+/** This value should not be tested against directly, instead
+ G3D::isNan() and G3D::isFinite() will return reliable results. */
+double nan() {
+ // double is a standard type and should have quiet NaN
+ return std::numeric_limits<double>::quiet_NaN();
+}
+
+float fnan() {
+ // double is a standard type and should have quiet NaN
+ return std::numeric_limits<float>::quiet_NaN();
+}
+
+
+int highestBit(uint32 x) {
+ // Binary search.
+ int base = 0;
+
+ if (x & 0xffff0000) {
+ base = 16;
+ x >>= 16;
+ }
+ if (x & 0x0000ff00) {
+ base += 8;
+ x >>= 8;
+ }
+ if (x & 0x000000f0) {
+ base += 4;
+ x >>= 4;
+ }
+
+ static const int lut[] = {-1,0,1,1,2,2,2,2,3,3,3,3,3,3,3,3};
+ return base + lut[x];
+}
+
+
+int iRandom(int low, int high) {
+ int r = iFloor(low + (high - low + 1) * (double)rand() / RAND_MAX);
+
+ // There is a *very small* chance of generating
+ // a number larger than high.
+ if (r > high) {
+ return high;
+ } else {
+ return r;
+ }
+}
+
+
+}