public FreeBrush(BrushManager manager, SceneNode node)
: base(manager, node)
{
var mesh = manager.LoadAsset <Mesh>("title:Resources/Meshes/Cube.json");
brushMesh = new BrushMesh("BrushMesh", manager.GraphicsDevice, mesh);
brushMesh.Color = new Vector3(1, 0, 0);
brushMesh.Alpha = 0.5f;
Node.Objects.Add(brushMesh);
// 常にペイント可能。
CanPaint = true;
}
public StickyBrush(BrushManager manager, SceneNode node)
: base(manager, node)
{
var mesh = manager.LoadAsset <Mesh>("title:Resources/Meshes/Cube.json");
brushMesh = new BrushMesh("BrushMesh", manager.GraphicsDevice, mesh);
brushMesh.Color = new Vector3(1, 0, 0);
brushMesh.Alpha = 0.5f;
Node.Objects.Add(brushMesh);
triangleInfos = new TriangleInfo[2 * 6];
// 原点中心の立方体をブロックのグリッドへ移動させるための行列。
var transform = Matrix.CreateTranslation(new Vector3(0.5f));
int i = 0;
for (int j = 0; j < Side.Count; j++)
{
var side = Side.Items[j];
var normal = side.Direction.ToVector3();
var side1 = new Vector3(normal.Y, normal.Z, normal.X);
var side2 = Vector3.Cross(normal, side1);
// (0,0,0) を原点に頂点を算出。
var v0 = (normal - side1 - side2) * 0.5f;
var v1 = (normal - side1 + side2) * 0.5f;
var v2 = (normal + side1 + side2) * 0.5f;
var v3 = (normal + side1 - side2) * 0.5f;
// ブロックのグリッドに移動。
Vector3.Transform(ref v0, ref transform, out v0);
Vector3.Transform(ref v1, ref transform, out v1);
Vector3.Transform(ref v2, ref transform, out v2);
Vector3.Transform(ref v3, ref transform, out v3);
triangleInfos[i] = new TriangleInfo(side)
{
Triangle = new Triangle(v0, v1, v2)
};
triangleInfos[i + 1] = new TriangleInfo(side)
{
Triangle = new Triangle(v0, v2, v3)
};
i += 2;
}
}