private void DrawStraightLine(RiverSystem river)
{
foreach (var pair in river.GetControlPointPairs(river.ControlPoints))
{
Handles.DrawLine(river.transform.position + pair.First.Position, river.transform.position + pair.Second.Position);
}
}
private void DrawCurvedLine(RiverSystem river)
{
var leftRotation = Quaternion.LookRotation(Vector3.left);
var rightotation = Quaternion.LookRotation(Vector3.right);
foreach (var pair in river.GetControlPointPairs(river.ControlPoints))
{
var distance = (pair.Second.Position - pair.First.Position).magnitude / 3;
var firstPoint = pair.First.Position + river.transform.position;
var lastPoint = pair.Second.Position + river.transform.position;
var extraPosition01 = pair.First.Position + pair.First.Direction * Vector3.forward * distance + river.transform.position;
var extraPosition02 = pair.Second.Position + pair.Second.Direction * Vector3.back * distance + river.transform.position;
Handles.DrawBezier(firstPoint, lastPoint, extraPosition01, extraPosition02, Color.green, null, 2);
}
}
private void ShowControlPoint(RiverSystem.RiverControlPoint controlPoint, RiverSystem river)
{
var position = river.transform.position + controlPoint.Position;
float size = HandleUtility.GetHandleSize(position) * 1f;
EditorGUI.BeginChangeCheck();
controlPoint.Position = Handles.DoPositionHandle(position, controlPoint.Direction) - river.transform.position;
controlPoint.Direction = Handles.Disc(controlPoint.Direction, position, Vector3.up, 1, false, 0);
controlPoint.Width = Mathf.Clamp(Handles.ScaleSlider(controlPoint.Width, position, controlPoint.Direction * Vector3.left, controlPoint.Direction, 2, 0), 0.2f, float.MaxValue);
Handles.DrawLine(position + controlPoint.Direction * Vector3.left * controlPoint.Width, position);
Handles.DrawLine(position + controlPoint.Direction * Vector3.right * controlPoint.Width, position);
if (EditorGUI.EndChangeCheck())
{
Undo.RecordObject(river, "Edited River controlpoint");
river.UpdateRiverMesh();
EditorUtility.SetDirty(river);
}
}
private InWorldPosition GetInWorldPoint(Vector2 position, RiverSystem river)
{
if (Physics.Raycast(HandleUtility.GUIPointToWorldRay(position), out RaycastHit raycastHit))
{
if (raycastHit.collider.gameObject == river.gameObject)
{
return(new InWorldPosition {
Position = raycastHit.point, IsInWorld = true, IsInRiver = true, ControlPoints = GetSelectedControlPoint(raycastHit, river)
});
}
else
{
return(new InWorldPosition {
Position = raycastHit.point, IsInWorld = true, IsInRiver = false
});
}
}
else
{
return(new InWorldPosition {
Position = Vector3.zero, IsInWorld = false
});
}
}
private RiverSystem.ControlPointPair GetSelectedControlPoint(RaycastHit raycastHit, RiverSystem river)
{
// Each segment consist of a quad(2 tris, 6 indices)
var segmentIndex = raycastHit.triangleIndex / 2;
var placedSegmentIndex = Mathf.Clamp((segmentIndex + 1) / (river.SmoothingLevel + 1), 0, int.MaxValue);
var previousSegmentIndex = Mathf.Clamp(segmentIndex / (river.SmoothingLevel + 1), 0, int.MaxValue);
if (previousSegmentIndex == placedSegmentIndex)
{
previousSegmentIndex = placedSegmentIndex + 1;
}
return(new RiverSystem.ControlPointPair(river.ControlPoints [placedSegmentIndex], river.ControlPoints[previousSegmentIndex]));
}