public static void Draw(ISpriteBatch sb, Vector2 source, Vector2 dest, Color color)
{
var dist = Vector2.Distance(source, dest);
var angle = GetAngle(source, dest);
// Get the length of the segments
var segLen = dist / 6;
if (segLen < 5.0f)
{
segLen = 5.0f;
}
if (segLen > 25.0f)
{
segLen = 25.0f;
}
// Primary line
var tailLen = dist - (segLen / 2);
var pDest = source + (new Vector2((float)Math.Cos(angle), (float)Math.Sin(angle)) * tailLen);
RenderLine.Draw(sb, source, pDest, color);
// Arrow segment 1
var ang1 = angle - MathHelper.PiOver4;
var seg1 = dest - (new Vector2((float)Math.Cos(ang1), (float)Math.Sin(ang1)) * segLen);
RenderLine.Draw(sb, dest, seg1, color);
// Arrow segment 2
var ang2 = angle + MathHelper.PiOver4;
var seg2 = dest - (new Vector2((float)Math.Cos(ang2), (float)Math.Sin(ang2)) * segLen);
RenderLine.Draw(sb, dest, seg2, color);
// Arrow segment 3
RenderLine.Draw(sb, seg1, seg2, color);
}
/// <summary>
/// Recursively draws the joints and bones of a skeleton.
/// </summary>
/// <param name="camera">Camera to use.</param>
/// <param name="sb"><see cref="ISpriteBatch"/> to draw to.</param>
/// <param name="selectedNode">SpriteBatch to draw to.</param>
/// <param name="node">Current node being drawn.</param>
/// <param name="colorIndex">Index of the color to use from the ColorList.</param>
static void RecursiveDraw(ICamera2D camera, ISpriteBatch sb, SkeletonNode selectedNode, SkeletonNode node, int colorIndex)
{
// Find the color of the joint
var color = _colorList[colorIndex];
if (node == selectedNode)
{
color = _nodeColorSelected;
}
else if (node.Parent == null)
{
color = _nodeColorRoot;
}
// Draw the joint
var scale = 1f / camera.Scale;
var origin = SkeletonNode.HalfJointVector;
_joint.Draw(sb, node.Position, color, SpriteEffects.None, 0f, origin, scale);
// Iterate through the children
foreach (var child in node.Nodes)
{
colorIndex++;
if (colorIndex == _colorList.Length)
{
colorIndex = 0;
}
// Draw the bone to the child
RenderLine.Draw(sb, node.Position, child.Position, _colorList[colorIndex], (1f / camera.Scale) * 2f);
// Draw the child
RecursiveDraw(camera, sb, selectedNode, child, colorIndex);
}
}