// I/F
public VertexSource <VertexPositionNormal, ushort> CreateVertexSource()
{
var source = new VertexSource <VertexPositionNormal, ushort>();
var quadrangle = new Quadrangle();
float s = Size * 0.5f;
// REFERENCE: 立方体頂点計算アルゴリズムは XNA の Primitive3D サンプル コードより。
Vector3[] normals =
{
new Vector3(0, 0, 1),
new Vector3(0, 0, -1),
new Vector3(1, 0, 0),
new Vector3(-1, 0, 0),
new Vector3(0, 1, 0),
new Vector3(0, -1, 0),
};
foreach (var normal in normals)
{
var side1 = new Vector3(normal.Y, normal.Z, normal.X);
var side2 = Vector3.Cross(normal, side1);
quadrangle.Position0 = (normal - side1 - side2) * s;
quadrangle.Position1 = (normal - side1 + side2) * s;
quadrangle.Position2 = (normal + side1 + side2) * s;
quadrangle.Position3 = (normal + side1 - side2) * s;
quadrangle.Normal = normal;
quadrangle.Make(source);
}
return(source);
}
/// <summary>
/// VertexSource へ頂点データを設定します。
/// </summary>
/// <param name="source">頂点データが設定される VertexSource。</param>
public void Make(VertexSource <VertexPositionNormalColor, ushort> source)
{
MakeIndices(source);
source.AddVertex(new VertexPositionNormalColor(Position0, Normal, Color));
source.AddVertex(new VertexPositionNormalColor(Position1, Normal, Color));
source.AddVertex(new VertexPositionNormalColor(Position2, Normal, Color));
source.AddVertex(new VertexPositionNormalColor(Position3, Normal, Color));
}
void MakeIndices <TVertex>(VertexSource <TVertex, ushort> source)
where TVertex : struct
{
source.AddIndex((ushort)(source.CurrentVertex + 0));
source.AddIndex((ushort)(source.CurrentVertex + 1));
source.AddIndex((ushort)(source.CurrentVertex + 2));
source.AddIndex((ushort)(source.CurrentVertex + 0));
source.AddIndex((ushort)(source.CurrentVertex + 2));
source.AddIndex((ushort)(source.CurrentVertex + 3));
}
/// <summary>
/// VertexSource へ頂点データを設定します。
/// </summary>
/// <param name="source">頂点データが設定される VertexSource。</param>
public void Make(VertexSource <VertexPositionNormal, ushort> source)
{
var quad = new Quadrangle();
for (int i = 0; i < normals.Length; i++)
{
ResolvePositionNormal(ref quad, ref normals[i]);
quad.Make(source);
}
}
/// <summary>
/// VertexSource へ頂点データを設定します。
/// </summary>
/// <param name="source">頂点データが設定される VertexSource。</param>
public void Make(VertexSource <VertexPositionNormalColor, ushort> source)
{
source.AddIndex((ushort)(source.CurrentVertex + 0));
source.AddIndex((ushort)(source.CurrentVertex + 1));
source.AddIndex((ushort)(source.CurrentVertex + 2));
source.AddIndex((ushort)(source.CurrentVertex + 0));
source.AddIndex((ushort)(source.CurrentVertex + 2));
source.AddIndex((ushort)(source.CurrentVertex + 3));
source.AddVertex(new VertexPositionNormalColor(Position0, Normal, Color));
source.AddVertex(new VertexPositionNormalColor(Position1, Normal, Color));
source.AddVertex(new VertexPositionNormalColor(Position2, Normal, Color));
source.AddVertex(new VertexPositionNormalColor(Position3, Normal, Color));
}
// I/F
public VertexSource <VertexPositionNormalColor, ushort> CreateVertexSource()
{
var source = new VertexSource <VertexPositionNormalColor, ushort>();
var maker = new ColoredQuadrangle();
float s = Size * 0.5f;
// REFERENCE: 立方体頂点計算アルゴリズムは XNA の Primitive3D サンプル コードより。
Vector3[] normals =
{
new Vector3(0, 0, 1),
new Vector3(0, 0, -1),
new Vector3(1, 0, 0),
new Vector3(-1, 0, 0),
new Vector3(0, 1, 0),
new Vector3(0, -1, 0),
};
Color[] colors =
{
NorthSurfaceColor,
SouthSurfaceColor,
WestSurfaceColor,
EastSurfaceColor,
TopSurfaceColor,
BottomSurfaceColor
};
for (int i = 0; i < normals.Length; i++)
{
var normal = normals[i];
var side1 = new Vector3(normal.Y, normal.Z, normal.X);
var side2 = Vector3.Cross(normal, side1);
maker.Position0 = (normal - side1 - side2) * s;
maker.Position1 = (normal - side1 + side2) * s;
maker.Position2 = (normal + side1 + side2) * s;
maker.Position3 = (normal + side1 - side2) * s;
maker.Normal = normal;
maker.Color = colors[i];
maker.Make(source);
}
return(source);
}
/// <summary>
/// 指定された VertexSource から GeometricPrimitive を生成します。
/// </summary>
/// <typeparam name="TVertex">頂点構造体の型。</typeparam>
/// <typeparam name="TIndex">インデックスの型。</typeparam>
/// <param name="graphicsDevice">GraphicsDevice。</param>
/// <param name="source">VertexSource。</param>
/// <returns>生成された GeometricPrimitive。</returns>
public static GeometricPrimitive Create <TVertex, TIndex>(GraphicsDevice graphicsDevice, VertexSource <TVertex, TIndex> source)
where TVertex : struct
where TIndex : struct
{
var vertices = source.Vertices.ToArray();
var indices = source.Indices.ToArray();
return(Create(graphicsDevice, vertices, indices));
}
