private void AddControlPointToMesh(RiverControlPoint controlPoint, RiverControlPoint lastControlPoint, MeshData meshData)
{
var leftRotation = Quaternion.LookRotation(Vector3.left);
var rightRotation = Quaternion.LookRotation(Vector3.right);
meshData.CurrentUvOffset += GetUvOffset(controlPoint, lastControlPoint);
meshData.CurrentLeftUvOffset += GetRotatedUvOffset(controlPoint, lastControlPoint, leftRotation);
meshData.CurrentRightUvOffset += GetRotatedUvOffset(controlPoint, lastControlPoint, rightRotation);
meshData.Vertices.Add(GetVectorPosition(controlPoint.Position, controlPoint.Direction, Vector3.left, controlPoint.Width));
meshData.Vertices.Add(GetVectorPosition(controlPoint.Position, controlPoint.Direction, Vector3.right, controlPoint.Width));
// All river segments points up regardless of actual orientation
meshData.Normals.Add(Vector3.up);
meshData.Normals.Add(Vector3.up);
// Make the X axis a continous point along the edge and the y axis continous along the middle. Makes it looks smoother
meshData.Uvs.Add(new Vector2(meshData.CurrentLeftUvOffset, -controlPoint.Width) * UvScale);
meshData.Uvs.Add(new Vector2(meshData.CurrentRightUvOffset, controlPoint.Width) * UvScale);
if (lastControlPoint != null)
{
meshData.Triangles.AddRange(new int[] { meshData.CurrentIndex - 2, meshData.CurrentIndex, meshData.CurrentIndex - 1, meshData.CurrentIndex, meshData.CurrentIndex + 1, meshData.CurrentIndex - 1 });
}
meshData.CurrentIndex += 2;
}
private float GetRotatedUvOffset(RiverControlPoint controlPoint, RiverControlPoint lastControlPoint, Quaternion direction)
{
if (lastControlPoint == null)
{
return(0);
}
return((GetOffsetPosition(lastControlPoint, direction) - GetOffsetPosition(controlPoint, direction)).magnitude);
}
private float GetUvOffset(RiverControlPoint controlPoint, RiverControlPoint lastControlPoint)
{
if (lastControlPoint == null)
{
return(0);
}
return((lastControlPoint.Position - controlPoint.Position).magnitude);
}
public void InsertControlPoint(ControlPointPair controlPoints, Vector3 position)
{
var targetPosition = position - transform.position;
var direction = Quaternion.Lerp(controlPoints.First.Direction, controlPoints.Second.Direction, 0.5f);
var width = Mathf.Lerp(controlPoints.First.Width, controlPoints.Second.Width, 0.5f);
var controlPoint = new RiverControlPoint {
Position = targetPosition, Direction = direction, Width = width
};
var insertIndex = Mathf.Max(ControlPoints.IndexOf(controlPoints.First), ControlPoints.IndexOf(controlPoints.Second));
ControlPoints.Insert(insertIndex, controlPoint);
UpdateRiverMesh();
}
public void AddControlPoint(Vector3 position)
{
var lastControlPoint = ControlPoints.Last();
var directionOffset = position - (transform.position + lastControlPoint.Position);
directionOffset.y = 0;
var direction = Quaternion.LookRotation(directionOffset);
var targetPosition = position - transform.position;
targetPosition.y = lastControlPoint.Position.y;
var controlPoint = new RiverControlPoint {
Position = targetPosition, Direction = direction, Width = lastControlPoint.Width
};
ControlPoints.Add(controlPoint);
UpdateRiverMesh();
}
public ControlPointPair(RiverControlPoint first, RiverControlPoint second)
{
First = first;
Second = second;
}
private Vector3 GetOffsetPosition(RiverControlPoint controlPoint, Quaternion direction)
{
return(controlPoint.Position + controlPoint.Direction * direction * Vector3.forward * controlPoint.Width);
}
public void RemoveControlPoint(RiverControlPoint controlPoint)
{
ControlPoints.Remove(controlPoint);
UpdateRiverMesh();
}
