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4/8/2010

A line strip is a primitive that is composed of connected line segments. Your application can use line strips for creating polygons that are not closed. A closed polygon is a polygon whose last vertex is connected to its first vertex by a line segment. If your application makes polygons based on line strips, the vertices are not guaranteed to be coplanar.

The following illustration shows a rendered line strip.

The line strip primitive is identified by the D3DMPT_LINESTRIP element of the D3DMPRIMITIVETYPEenumeration.

The following code example shows how to create vertices for this line strip.

Copy Code 
struct CUSTOMVERTEX
{
	float x,y,z;
};

CUSTOMVERTEX Vertices[] = 
{
	{-5.0, -5.0, 0.0},
	{ 0.0,  5.0, 0.0},
	{ 5.0, -5.0, 0.0},
	{10.0,  5.0, 0.0},
	{15.0, -5.0, 0.0},
	{20.0,  5.0, 0.0}
};

The following code example shows how to use IDirect3DMobileDevice::DrawPrimitiveto render this line strip.

Copy Code 
//
// It is assumed that d3dmDevice is a valid
// pointer to a IDirect3DMobileDevice interface.
//
d3dmDevice->DrawPrimitive( D3DMPT_LINESTRIP, 0, 5 );

See Also