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Ray plane intersection function

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This commit is contained in:
Tom Cumming 2014-01-07 10:54:00 +00:00
parent fee3eddd37
commit b4a93abafe
2 changed files with 29 additions and 0 deletions
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9
glm/gtx/intersect.hpp
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@ -52,6 +52,15 @@ namespace glm
/// @addtogroup gtx_intersect /// @addtogroup gtx_intersect
/// @{ /// @{
//! Compute the intersection of a ray and a triangle.
//! Ray direction and plane normal must be unit length.
//! From GLM_GTX_intersect extension.
template <typename genType>
bool intersectRayPlane(
genType const & orig, genType const & dir,
genType const & planeOrig, genType const & planeNormal,
typename genType::value_type & intersectionDistance);
//! Compute the intersection of a ray and a triangle. //! Compute the intersection of a ray and a triangle.
//! From GLM_GTX_intersect extension. //! From GLM_GTX_intersect extension.
template <typename genType> template <typename genType>

20
glm/gtx/intersect.inl
View File

@ -13,6 +13,26 @@
namespace glm namespace glm
{ {
template <typename genType>
GLM_FUNC_QUALIFIER bool intersectRayPlane
(
genType const & orig, genType const & dir,
genType const & planeOrig, genType const & planeNormal,
typename genType::value_type & intersectionDistance
)
{
typename genType::value_type d = glm::dot(dir, planeNormal);
typename genType::value_type Epsilon = std::numeric_limits<typename genType::value_type>::epsilon();
if(d < Epsilon)
{
intersectionDistance = glm::dot(planeOrig - orig, planeNormal) / d;
return true;
}
return false;
}
template <typename genType> template <typename genType>
GLM_FUNC_QUALIFIER bool intersectRayTriangle GLM_FUNC_QUALIFIER bool intersectRayTriangle
( (