Package: libglu1-mesa
Version: 7.0.1-2
Severity: important
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In the call
if (!__gluInvertMatrixd(finalMatrix,finalMatrix)) return(GL_FALSE);
in gluUnProject, there's mistake. Inspecting the implementation
of __gluInverMatrixd(const double* src, double* inv) the arrays src and
inv cannot overlap. There should be another intermediate 4x4 matrix
defined, like
GLint GLAPIENTRY
gluUnProject(GLdouble winx, GLdouble winy, GLdouble winz,
const GLdouble modelMatrix[16],
const GLdouble projMatrix[16],
const GLint viewport[4],
GLdouble *objx,
GLdouble *objy,
GLdouble *objz)
{
double finalMatrix[16];
double temp[16]; /* New temporary store. */
double in[4];
double out[4];
__gluMultMatricesd(modelMatrix, projMatrix, temp);
if (!__gluInvertMatrixd(temp,finalMatrix)) return(GL_FALSE);
The rest of the function is as before.
If this is not done, then gluUnProject will return very small (and
incorrect) vectors in (*objx,*objy,*objz)
[Please also refer to discussion on
https://savannah.cern.ch/bugs/index.php?30943]
Yours,
Christian
-- System Information:
Debian Release: lenny/sid
APT prefers unstable
APT policy: (500, 'unstable'), (500, 'testing'), (1, 'experimental')
Architecture: i386 (i686)
Kernel: Linux 2.6.22-3-686 (SMP w/2 CPU cores)
Locale: LANG=en_DK.UTF-8, LC_CTYPE=en_DK.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages libglu1-mesa depends on:
ii libc6 2.6.1-6 GNU C Library: Shared libraries
ii libgcc1 1:4.2.2-3 GCC support library
ii libgl1-mesa-glx [libgl1] 7.0.1-2 A free implementation of the OpenG
ii libstdc++6 4.2.2-3 The GNU Standard C++ Library v3
libglu1-mesa recommends no packages.
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