private void AddRenderArrow(RenderBuffer renderBuffer,
Pointd fromPoint, Pointd toPoint,
double priorityRate, Color color)
{
var diff = toPoint - fromPoint;
var length = diff.Distance;
var lengthMax = SquareSize.Width * 5.0;
// 距離が近いものほど小さくなる
var lengthRate = Math.Min(length, lengthMax) / lengthMax;
var rad = Math.Atan2(diff.Y, diff.X);
var transform = new Matrix44d();
transform.Translate(fromPoint.X, fromPoint.Y, 1.0);
transform.Rotate(rad - Math.PI / 2, 0, 0, 1);
transform.Scale(
SquareSize.Width *
MathEx.InterpLiner(0.8, 0.8, lengthRate) *
MathEx.InterpLiner(0.8, 0.2, priorityRate),
length, 1.0);
// 矢印の不透明度を更新
var newColor = Color.FromArgb(ArrowAlpha(priorityRate), color);
// 矢印の中身を描画
renderBuffer.AddRender(
BlendType.Diffuse, newColor,
CreateArrowMesh(length, priorityRate, false),
transform, ShogiZOrder.PreEffectZ - priorityRate);
// 矢印のアウトラインを描画
renderBuffer.AddRenderAction(
() =>
{
GL.Color4(newColor.R, newColor.G, newColor.B, (byte)(newColor.A + 50));
GL.LineWidth(0.5f);
GL.LoadMatrix(transform.AsColumnMajorArray);
var mesh2 = CreateArrowMesh(length, priorityRate, true);
GL.Begin(PrimitiveType.LineLoop);
mesh2.VertexArray.ForEach(_ => GL.Vertex3(_.X, _.Y, _.Z));
GL.End();
},
ShogiZOrder.PreEffectZ - priorityRate);
}