public List <Triangle> GeneratePhysicalVertices(List <TrackNode> nodes)
{
List <VertexPositionColor> verts = new List <VertexPositionColor>();
List <Triangle> roadVerts = new List <Triangle>();
TrackNode nextNode;
//Vector3 prevLeft = GetRoadOffsetPosition(nodes[nodes.Count - 1], -nodes[nodes.Count - 1].DistanceToLeftBarrier); // nodes[0].Position + Utility.RotatePoint(new Vector2(-nodes[0].DistanceToLeftBarrier, 0), nodes[0].Orientation);
//Vector3 prevRight = GetRoadOffsetPosition(nodes[nodes.Count - 1], nodes[nodes.Count - 1].DistanceToRightBarrier); // nodes[0].Position + Utility.RotatePoint(new Vector2(nodes[0].DistanceToRightBarrier, 0), nodes[0].Orientation);
for (int i = 0; i < nodes.Count; i++)
{
TrackNode node = nodes[i];
if (i + 1 < nodes.Count)
{
nextNode = nodes[i + 1];
}
else
{
nextNode = nodes[0]; //join up to start line
}
float zPos = node.Position.Z - nextNode.Position.Z;
Vector3 prevLeft = GetRoadOffsetPosition(node, -node.DistanceToLeftBarrier);
Vector3 prevRight = GetRoadOffsetPosition(node, node.DistanceToRightBarrier);
Vector3 currentLeft = nextNode.Position + Utility.RotatePoint(new Vector2(-node.DistanceToLeftBarrier, 0), -node.Orientation);
Vector3 currentRight = nextNode.Position + Utility.RotatePoint(new Vector2(node.DistanceToRightBarrier, 0), -node.Orientation);
var t = new Triangle(nextNode.GetLeftBoundary(), node.GetLeftBoundary(), node.GetRightBoundary());
var t2 = new Triangle(nextNode.GetLeftBoundary(), node.GetRightBoundary(), nextNode.GetRightBoundary());
roadVerts.Add(t);
roadVerts.Add(t2);
var normal = Vector3.Normalize(Vector3.Cross(t.V2 - t.V1, t.V3 - t.V1));
var normal2 = Vector3.Normalize(Vector3.Cross(t2.V2 - t2.V1, t2.V3 - t2.V1));
if (Math.Round(normal.X, 2) != Math.Round(normal2.X, 2) ||
Math.Round(normal.Y, 2) != Math.Round(normal2.Y, 2) ||
Math.Round(normal.Z, 2) != Math.Round(normal2.Z, 2))
{
}
//roadVerts.Add(prevLeft);
//roadVerts.Add(currentLeft);
//roadVerts.Add(prevRight);
//roadVerts.Add(currentLeft);
//roadVerts.Add(prevRight);
//roadVerts.Add(currentRight);
prevLeft = currentLeft;
prevRight = currentRight;
}
//_vertexBuffer = new VertexBuffer(Engine.Instance.Device, VertexPositionColor.SizeInBytes * verts.Count, BufferUsage.WriteOnly);
//_vertexBuffer.SetData<VertexPositionColor>(verts.ToArray());
return(roadVerts);
}
public float GetHeightAtPoint(TrackNode node, Vector3 point)
{
Vector3 a = node.GetLeftBoundary();
Vector3 b = node.GetRightBoundary();
Vector3 c = node.Next.GetRightBoundary();
Vector3 d = node.Next.GetLeftBoundary();
Vector3 hitLoc;
float t;
Vector3 pos = point; pos.Y += 100;
if (Utility.FindRayTriangleIntersection(ref pos, Vector3.Down, 1000f, ref a, ref b, ref c, out hitLoc, out t))
{
return(hitLoc.Y);
}
else if (Utility.FindRayTriangleIntersection(ref pos, Vector3.Down, 1000f, ref a, ref c, ref d, out hitLoc, out t))
{
return(hitLoc.Y);
}
else
{
return(-9999);
}
}
private void PositionCameraAtNode(TrackNode node)
{
_cameraNode = node;
_camera.Position = Engine.Instance.Random.Next() % 2 == 0 ? _cameraNode.GetLeftBoundary() : _cameraNode.GetRightBoundary();
_camera.Position = _camera.Position + new Vector3(0, Engine.Instance.Random.Next(15, 50), 0);
}
private void FollowTrackOrientation(TrackNode node, TrackNode nextNode)
{
var closestPoint1 = Utility.GetClosestPointOnLine(node.GetLeftBoundary(), node.GetRightBoundary(), Position);
var closestPoint2 = Utility.GetClosestPointOnLine(nextNode.GetLeftBoundary(), nextNode.GetRightBoundary(), Position);
var dist = Distance2d(closestPoint1, closestPoint2);
var carDist = Distance2d(closestPoint1, Position);
float ratio = Math.Min(carDist / dist, 1.0f);
TrackPosition = CurrentNode.Number + ratio;
// if the road is sloping downwards and we have enough speed, unstick from ground
if (node.Slope - nextNode.Slope > 50 && Speed > 100 && _isOnGround)
{
_isOnGround = false;
_upVelocity = -0.4f;
}
if (_isOnGround)
{
Up = Vector3.Lerp(node.Up, nextNode.Up, ratio);
Up = Vector3.Normalize(Up);
Direction = Vector3.Cross(Up, Right);
Direction.Normalize();
}
_currentHeightOfTrack = MathHelper.Lerp(closestPoint1.Y, closestPoint2.Y, ratio);
if (_currentHeightOfTrack == -9999)
{
throw new Exception();
}
if (_isOnGround)
{
var newPosition = Position;
newPosition.Y = _currentHeightOfTrack;
Position = newPosition;
}
//GameConsole.WriteLine("height: " + _position.Y, 0);
//GameConsole.WriteLine("ratio: " + ratio, 1);
}