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Added disk and ball rand implementations

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This commit is contained in:
Christophe Riccio 2011-09-23 09:59:13 +01:00
parent 5f52e6a82f
commit c7e5c17898
2 changed files with 125 additions and 11 deletions
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35
glm/gtc/random.hpp
View File

@ -65,21 +65,46 @@ namespace glm
genType const & Max);
/// Generate random numbers in the interval [Min, Max], according a gaussian distribution
/// (From GLM_GTX_random extension)
///
/// @param Mean
/// @param Deviation
/// @see gtc_random
template <typename genType>
genType gaussRand(
genType const & Mean,
genType const & Deviation);
/// Generate a random 2D vector which coordinates are regulary distributed on a circle of a given radius
/// (From GLM_GTX_random extension)
///
/// @param Radius
/// @see gtc_random
template <typename T>
detail::tvec2<T> circularRand(T const & Radius);
detail::tvec2<T> circularRand(
T const & Radius);
/// Generate a random 3D vector which coordinates are regulary distributed on a sphere of a given radius
/// (From GLM_GTX_random extension)
///
/// @param Radius
/// @see gtc_random
template <typename T>
detail::tvec3<T> sphericalRand(T const & Radius);
detail::tvec3<T> sphericalRand(
T const & Radius);
/// Generate a random 2D vector which coordinates are regulary distributed within the area of a disk of a given radius
///
/// @param Radius
/// @see gtc_random
template <typename T>
detail::tvec2<T> diskRand(
T const & Radius);
/// Generate a random 3D vector which coordinates are regulary distributed within the volume of a ball of a given radius
///
/// @param Radius
/// @see gtc_random
template <typename T>
GLM_FUNC_QUALIFIER detail::tvec3<T> ballRand(
T const & Radius);
/// @}
}//namespace glm

101
glm/gtc/random.inl
View File

@ -81,16 +81,105 @@ GLM_FUNC_QUALIFIER detail::tvec4<T> linearRand
linearRand(Min.w, Max.w));
}
template <>
half gaussRand
template <typename genType>
GLM_FUNC_QUALIFIER genType gaussRand
(
half const & Mean,
half const & Deviation
genType const & Mean,
genType const & Deviation
)
{
genType w, x1, x2;
do
{
x1 = compRand1(genType(-1), genType(1));
x2 = compRand1(genType(-1), genType(1));
w = x1 * x1 + x2 * x2;
} while(w > genType(1));
return x2 * std_deviation * std_deviation * sqrt((genType(-2) * log(w)) / w) + mean;
}
template <typename T>
detail::tvec2<T> circularRand
GLM_FUNC_QUALIFIER detail::tvec2<T> gaussRand
(
detail::tvec2<T> const & Min,
detail::tvec2<T> const & Max
)
{
return detail::tvec2<T>(
gaussRand(Min.x, Max.x),
gaussRand(Min.y, Max.y));
}
template <typename T>
GLM_FUNC_QUALIFIER detail::tvec3<T> gaussRand
(
detail::tvec3<T> const & Min,
detail::tvec3<T> const & Max
)
{
return detail::tvec3<T>(
gaussRand(Min.x, Max.x),
gaussRand(Min.y, Max.y),
gaussRand(Min.z, Max.z));
}
template <typename T>
GLM_FUNC_QUALIFIER detail::tvec4<T> gaussRand
(
detail::tvec4<T> const & Min,
detail::tvec4<T> const & Max
)
{
return detail::tvec4<T>(
gaussRand(Min.x, Max.x),
gaussRand(Min.y, Max.y),
gaussRand(Min.z, Max.z),
gaussRand(Min.w, Max.w));
}
template <typename T>
GLM_FUNC_QUALIFIER detail::tvec3<T> diskRand
(
T const & Radius
)
{
detail::tvec2<T> Result(T(0));
T LenRadius(T(0));
do
{
Result = compRand2(-Radius, Radius);
LenRadius = length(Result);
}
while(LenRadius > Radius);
return Result;
}
template <typename T>
GLM_FUNC_QUALIFIER detail::tvec3<T> ballRand
(
T const & Radius
)
{
detail::tvec3<T> Result(T(0));
T LenRadius(T(0));
do
{
Result = compRand3(-Radius, Radius);
LenRadius = length(Result);
}
while(LenRadius > Radius);
return Result;
}
template <typename T>
GLM_FUNC_QUALIFIER detail::tvec2<T> circularRand
(
T const & Radius
)
@ -100,7 +189,7 @@ detail::tvec2<T> circularRand
}
template <typename T>
detail::tvec3<T> sphericalRand
GLM_FUNC_QUALIFIER detail::tvec3<T> sphericalRand
(
T const & Radius
)