public void TestTriangleGeneration()
{
int count = WireframeTriangleVertexGenerator.VertexCount;
VertexPositionColor[] vertices = new VertexPositionColor[count + 1];
WireframeTriangleVertexGenerator.Generate(
vertices, 1,
new Vector3(10.0f, 20.0f, 30.0f),
new Vector3(20.0f, 30.0f, 10.0f),
new Vector3(30.0f, 10.0f, 20.0f),
Color.Blue
);
Assert.AreEqual(Vector3.Zero, vertices[0].Position);
Assert.AreNotEqual(Vector3.Zero, vertices[1].Position);
Assert.AreNotEqual(Vector3.Zero, vertices[count - 1].Position);
}
/// <summary>Draws a wireframe triangle between three points</summary>
/// <param name="a">First corner point of the triangle</param>
/// <param name="b">Second corner point of the triangle</param>
/// <param name="c">Third corner point of the triangle</param>
/// <param name="color">Desired color of the line</param>
public void DrawTriangle(Vector3 a, Vector3 b, Vector3 c, Color color)
{
const int VertexCount = WireframeTriangleVertexGenerator.VertexCount;
// If we would collide with the triangles in the array or there simply
// isn't enough space left, set the overflow flag and silently skip drawing
int proposedStart = this.lineIndex - (VertexCount - 1);
if (proposedStart < this.triangleIndex)
{
this.overflowed = true;
return;
}
// Generate the vertices for box' wireframe
WireframeTriangleVertexGenerator.Generate(
this.queuedVertices, proposedStart, a, b, c, color
);
this.lineIndex -= VertexCount;
}