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# PolyTools.h, fix point of declaration for GetArea2D, thanks to Joe Hermaszewski to point it out. 

git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@1077 67173fc5-114c-0410-ac8e-9d2fd5bffc1f
pull/2/head
aramis_acg 2011-09-05 13:13:30 +00:00
parent 4f1a95a584
commit 1305376060
1 changed files with 10 additions and 11 deletions
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21
code/PolyTools.h
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@ -45,6 +45,16 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
namespace Assimp { namespace Assimp {
// -------------------------------------------------------------------------------
/** Compute the signed area of a triangle.
* The function accepts an unconstrained template parameter for use with
* both aiVector3D and aiVector2D, but generally ignores the third coordinate.*/
template <typename T>
inline double GetArea2D(const T& v1, const T& v2, const T& v3)
{
return 0.5 * (v1.x * ((double)v3.y - v2.y) + v2.x * ((double)v1.y - v3.y) + v3.x * ((double)v2.y - v1.y));
}
// ------------------------------------------------------------------------------- // -------------------------------------------------------------------------------
/** Test if a given point p2 is on the left side of the line formed by p0-p1. /** Test if a given point p2 is on the left side of the line formed by p0-p1.
* The function accepts an unconstrained template parameter for use with * The function accepts an unconstrained template parameter for use with
@ -81,17 +91,6 @@ inline bool PointInTriangle2D(const T& p0, const T& p1,const T& p2, const T& pp)
} }
// -------------------------------------------------------------------------------
/** Compute the signed area of a triangle.
* The function accepts an unconstrained template parameter for use with
* both aiVector3D and aiVector2D, but generally ignores the third coordinate.*/
template <typename T>
inline double GetArea2D(const T& v1, const T& v2, const T& v3)
{
return 0.5 * (v1.x * ((double)v3.y - v2.y) + v2.x * ((double)v1.y - v3.y) + v3.x * ((double)v2.y - v1.y));
}
// ------------------------------------------------------------------------------- // -------------------------------------------------------------------------------
/** Check whether the winding order of a given polygon is counter-clockwise. /** Check whether the winding order of a given polygon is counter-clockwise.
* The function accepts an unconstrained template parameter, but is intended * The function accepts an unconstrained template parameter, but is intended