glEdgeFlag, glEdgeFlagv: flag edges as either boundary or
C Specification |
Associated Gets |
const GLboolean *flag)
Each vertex of a polygon, separate triangle, or separate quadrilateral
specified between a glBegin/glEnd pair is marked as the start of either a
boundary or nonboundary edge. If the current edge flag is true when the
vertex is specified, the vertex is marked as the start of a boundary edge.
Otherwise, the vertex is marked as the start of a nonboundary edge.
glEdgeFlag sets the edge flag bit to GL_TRUE if
flag is GL_TRUE, and to
- Specifies the current edge flag value, either GL_TRUE or
GL_FALSE. The initial value is GL_TRUE.
- Specifies a pointer to an array that contains a single boolean element,
which replaces the current edge flag value.
The vertices of connected triangles and connected quadrilaterals are always
marked as boundary, regardless of the value of the edge flag.
Boundary and nonboundary edge flags on vertices are significant only if
GL_POLYGON_MODE is set to GL_POINT or
GL_LINE. See glPolygonMode.
The current edge flag can be updated at any time. In particular,
glEdgeFlag can be called between a call to glBegin and the corresponding call to glEnd.
glGet with argument