btConvexHullShape Read Access Violation

[leobenaducci]

hi,
i found a bug in btConvexHullShape::btConvexHullShape(const btScalar* points,int numPoints,int stride) when stride is < 16

btConvexHullShape.cpp Ln:31

change this

Code: Select all

btVector3* point = (btVector3*)(pointsBaseAddress + i*stride);
m_unscaledPoints[i] = point[0];

with this

Code: Select all

float* point = (float*)(pointsBaseAddress + i*stride);
btVector3& v = m_unscaledPoints[i];
((float*)v)[0] = *point++;
((float*)v)[1] = *point++;
((float*)v)[2] = *point++;
((float*)v)[3] = 0;

btVector3 operator= tries to read 4 floats from source, if you are using a 12-bytes stride this can crash

bye
Leo Benaducci

[Erwin Coumans]

Did you make sure to use Bullet 2.75? It should be fixed.

Thanks,
Erwin