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Add a reversed flag to tessAddContour()

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This commit is contained in:
Nigel Barber 2018-04-16 18:13:57 +01:00
parent b256f4940b
commit cbcb621d9d
2 changed files with 4 additions and 4 deletions
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2
Include/tesselator.h
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@ -192,7 +192,7 @@ void tessDeleteTess( TESStesselator *tess );
// pointer - pointer to the first coordinate of the first vertex in the array.
// stride - defines offset in bytes between consecutive vertices.
// count - number of vertices in contour.
void tessAddContour( TESStesselator *tess, int size, const void* pointer, int stride, int count );
void tessAddContour( TESStesselator *tess, int size, const void* pointer, int stride, int count, int reversed );
// tessSetOption() - Toggles optional tessellation parameters
// Parameters:

6
Source/tess.c
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@ -911,7 +911,7 @@ void OutputContours( TESStesselator *tess, TESSmesh *mesh, int vertexSize )
}
void tessAddContour( TESStesselator *tess, int size, const void* vertices,
int stride, int numVertices )
int stride, int numVertices, int reversed )
{
const unsigned char *src = (const unsigned char*)vertices;
TESShalfEdge *e;
@ -973,8 +973,8 @@ void tessAddContour( TESStesselator *tess, int size, const void* vertices,
* vertices in such an order that a CCW contour will add +1 to
* the winding number of the region inside the contour.
*/
e->winding = 1;
e->Sym->winding = -1;
e->winding = (reversed) ? -1 : 1;
e->Sym->winding = (reversed) ? 1 : -1;
}
}