Name
gl.EdgeFlag -- flag edges as either boundary or nonboundary
Synopsis
gl.EdgeFlag(flag)
Function
Each vertex of a polygon, separate triangle, or separate quadrilateral specified between a gl.Begin() / gl.End() 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. gl.EdgeFlag() sets the edge flag bit to #GL_TRUE if flag is #GL_TRUE and to #GL_FALSE otherwise. The initial value is #GL_TRUE.

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 gl.PolygonMode for details.

The current edge flag can be updated at any time. In particular, gl.EdgeFlag() can be called between a call to gl.Begin() and the corresponding call to gl.End().

Please consult an OpenGL reference manual for more information.

Inputs
flag
specifies the current edge flag value (either #GL_TRUE or #GL_FALSE)
Associated gets
gl.Get() with argument #GL_EDGE_FLAG

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