public void TestTriangleGeneration()
{
int count = SolidTriangleVertexGenerator.VertexCount;
VertexPositionColor[] vertices = new VertexPositionColor[count + 1];
SolidTriangleVertexGenerator.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 solid (filled) 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 DrawSolidTriangle(Vector3 a, Vector3 b, Vector3 c, Color color)
{
const int VertexCount = SolidTriangleVertexGenerator.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 proposedEnd = this.triangleIndex + VertexCount;
if (proposedEnd > this.lineIndex)
{
this.overflowed = true;
return;
}
// Generate the vertices for the faces of the box
SolidTriangleVertexGenerator.Generate(
this.queuedVertices, this.triangleIndex, a, b, c, color
);
this.triangleIndex += VertexCount;
}
