/// <summary>
/// Load
/// </summary>
/// <param name="inputPoints">Input points</param>
/// <param name="widthHelpers">Width helpers</param>
/// <param name="roadHelpers">Road helpers</param>
/// <param name="neutralObjects">Neutral objects</param>
/// <param name="landscape">Landscape</param>
protected void Load(Vector3[] inputPoints,
List<TrackData.WidthHelper> widthHelpers,
List<TrackData.RoadHelper> roadHelpers,
List<TrackData.NeutralObject> neutralObjects,
Landscape landscape)
{
#region Kill all previously loaded data
points.Clear();
helperPositions.Clear();
// Kill all loaded objects
if (landscape != null)
landscape.KillAllLoadedObjects();
#endregion
#region Make sure we got valid data
if (inputPoints == null ||
inputPoints.Length < 3)
throw new ArgumentException("inputPoints is invalid, we need at "+
"least 3 valid input points to generate a TrackLine.");
#endregion
#region Check if all points are ABOVE the landscape
if (landscape != null)
{
// Go through all spline points
for (int num = 0; num < inputPoints.Length; num++)
{
// Get landscape height here
float landscapeHeight = landscape.GetMapHeight(
inputPoints[num].X, inputPoints[num].Y) +
// add little to fix ground errors
MinimumLandscapeDistance * 2.25f;
// And make sure we are always above it!
if (inputPoints[num].Z < landscapeHeight)
inputPoints[num].Z = landscapeHeight;
} // for (num)
// Second pass, check 24 interpolation points between all inputPoints
for (int num = 0; num < inputPoints.Length; num++)
for (int iter = 1; iter < 25; iter++)
{
float iterPercent = iter / 25.0f;
float iterHeight = inputPoints[num].Z * (1 - iterPercent) +
inputPoints[(num + 1) % inputPoints.Length].Z * iterPercent;
// Check 2x2 points (in all directions) to make sure
// we don't go through the landscape at the sides
for (int x = 0; x < 2; x++)
for (int y = 0; y < 2; y++)
{
// Also get height at middle to next pos
float landscapeHeight = landscape.GetMapHeight(
-5.0f + 10.0f * x +
inputPoints[num].X * (1 - iterPercent) +
inputPoints[(num + 1) % inputPoints.Length].X * iterPercent,
-5.0f + 10.0f * y +
inputPoints[num].Y * (1 - iterPercent) +
inputPoints[(num + 1) % inputPoints.Length].Y * iterPercent)+
// add little to fix ground errors
MinimumLandscapeDistance * 1.6f;// 1.5f;//1.25f;
// Increase both positions if this point is under the landscape
if (iterHeight < landscapeHeight)
{
float increaseHeight = landscapeHeight - iterHeight;
inputPoints[num].Z += increaseHeight;
inputPoints[(num + 1) % inputPoints.Length].Z +=
increaseHeight;
} // if (iterHeight)
} // for
} // for for (iter)
} // if (landscape)
//Log.Write("Input points: " + StringHelper.WriteArrayData(inputPoints));
#endregion
#region Search for any loopings indicated by 2 points above each other
// Go through all spline points (ignore first and last 3, this
// makes it easier to remove points and add new ones).
for (int num = 1; num < inputPoints.Length-3; num++)
{
// X/Y distance has to be 4 times smaller than Z distance
Vector3 distVec = inputPoints[num + 1] - inputPoints[num];
float xyDist = (float)Math.Sqrt(
distVec.X*distVec.X+distVec.Y*distVec.Y);
float zDist = Math.Abs(distVec.Z);
// Also check if next point is down again.
Vector3 distVec2 = inputPoints[num + 2] - inputPoints[num + 1];
if (zDist / 2 > xyDist &&
Math.Abs(distVec.Z + distVec2.Z) < zDist / 2)
{
// Find out which direction we are going
Vector3 dir = inputPoints[num] - inputPoints[num - 1];
dir.Normalize();
Vector3 upVec = new Vector3(0, 0, 1);
Vector3 rightVec = Vector3.Cross(dir, upVec);
// Matrix build helper matrix to rotate our looping points
Matrix rotMatrix = new Matrix(
rightVec.X, rightVec.Y, rightVec.Z, 0,
dir.X, dir.Y, dir.Z, 0,
upVec.X, upVec.Y, upVec.Z, 0,
0, 0, 0, 1);
// Ok do a looping with zDist as height.
// Start with the current point, loop around and end with the
// point after the looping. We will remove the current and the
// next 2 points, but add 9 new points instead for our smooth loop.
// See LoopingPoints for the looping itself.
Vector3 startLoopPos = inputPoints[num];
Vector3 endLoopPos = inputPoints[num + 2];
// Insert 7 new points (9 new points, but we reuse
// start, middle and end points which are num, num+1 and num+2,
// plus an additional point after the looping to keep the road
// straight!)
Vector3[] remInputPoints = (Vector3[])inputPoints.Clone();
inputPoints = new Vector3[inputPoints.Length + 7];
// Copy everything over
for (int copyNum = 0; copyNum < remInputPoints.Length; copyNum++)
if (copyNum < num)
inputPoints[copyNum] = remInputPoints[copyNum];
else
inputPoints[copyNum + 7] = remInputPoints[copyNum];
// Ok, now we can add our loop
for (int loopNum = 0; loopNum < LoopingPoints.Length; loopNum++)
{
// Interpolate between start and end pos to land at the end pos!
float loopPercent = loopNum / (float)(LoopingPoints.Length - 1);
inputPoints[num + loopNum] =
startLoopPos * (1 - loopPercent) +
endLoopPos * loopPercent +
zDist * Vector3.Transform(LoopingPoints[loopNum], rotMatrix);
} // for (loopNum)
// Add extra point to keep the road straight
Vector3 newRoadDir =
inputPoints[num + 10] - inputPoints[num + 8];
// Don't go more than zDist * 2 units away!
if (newRoadDir.Length() > zDist * 2)
{
newRoadDir.Normalize();
newRoadDir = newRoadDir * zDist;
inputPoints[num + 9] = inputPoints[num + 8] + newRoadDir;
} // if (newRoadDir.Length)
else
// Just add an interpolation point
inputPoints[num + 9] =
(inputPoints[num + 8] + inputPoints[num + 10])/2.0f;
// Advance 10 points until we check for the next loop
num += 10;
// That's it, good work everyone ^^
} // if (zDist)
} // for (num)
#endregion
#region Generate all points with help of catmull rom splines
// Generate all points with help of catmull rom splines
for (int num = 0; num < inputPoints.Length; num++)
{
// Get the 4 required points for the catmull rom spline
Vector3 p1 = inputPoints[num-1 < 0 ? inputPoints.Length-1 : num-1];
Vector3 p2 = inputPoints[num];
Vector3 p3 = inputPoints[(num + 1) % inputPoints.Length];
Vector3 p4 = inputPoints[(num + 2) % inputPoints.Length];
// Calculate number of iterations we use here based
// on the distance of the 2 points we generate new points from.
float distance = Vector3.Distance(p2, p3);
int numberOfIterations =
(int)(NumberOfIterationsPer100Meters * (distance / 100.0f));
if (numberOfIterations <= 0)
numberOfIterations = 1;
Vector3 lastPos = p1;
for (int iter = 0; iter < numberOfIterations; iter++)
{
TrackVertex newVertex = new TrackVertex(
Vector3.CatmullRom(p1, p2, p3, p4,
iter / (float)numberOfIterations));
lastPos = newVertex.pos;
points.Add(newVertex);
} // for (iter)
} // for (num)
#endregion
#region Generate up vectors, very important for our road building
// Pre up vectors are used to first generate all optimal up vectors
// for the track, but this is not useful for driving because we need
// the road to point up always except for loopings.
List<Vector3> preUpVectors = new List<Vector3>();
// Now generate all up vectors, first pass does optimal up vectors.
Vector3 defaultUpVec = new Vector3(0, 0, 1);
Vector3 lastUpVec = defaultUpVec;
for (int num = 0; num < points.Count; num++)
{
// Get direction we are driving in at this point,
// interpolate with help of last and next points.
Vector3 dir = points[(num + 1) % points.Count].pos -
points[num - 1 < 0 ? points.Count - 1 : num - 1].pos;
dir.Normalize();
// Now calculate the optimal up vector for this point
Vector3 middlePoint = (points[(num + 1) % points.Count].pos +
points[num - 1 < 0 ? points.Count - 1 : num - 1].pos) / 2.0f;
Vector3 optimalUpVector = middlePoint - points[num].pos;
if (optimalUpVector.Length() < 0.0001f)
optimalUpVector = lastUpVec;
optimalUpVector.Normalize();
// Store the optimalUpVectors in the preUpVectors list
preUpVectors.Add(optimalUpVector);
// Also save dir vector
points[num].dir = dir;
// And remember the last upVec in case the road is going straight ahead
lastUpVec = optimalUpVector;
} // for (num)
// Interpolate the first up vector for a smoother road at the start pos
preUpVectors[0] = preUpVectors[preUpVectors.Count - 1] + preUpVectors[1];
preUpVectors[0].Normalize();
#endregion
#region Interpolate the up vectors and also add the dir and right vectors
// Second pass, interpolated precalced values and apply our logic :)
//preUpVectors[0] =
lastUpVec = Vector3.Lerp(defaultUpVec, preUpVectors[0],
1.5f * CurveFactor * UpFactorCorrector);
//lastUpVec = preUpVectors[0];
Vector3 lastUpVecUnmodified = lastUpVec;// defaultUpVec;
Vector3 lastRightVec = Vector3.Zero;
for (int num = 0; num < points.Count; num++)
{
// Grab dir vector (could be calculated here too)
Vector3 dir = points[num].dir;
// First of all interpolate the preUpVectors
Vector3 upVec =
//single input: preUpVectors[num];
Vector3.Zero;
for (int smoothNum = -NumberOfUpSmoothValues / 2;
smoothNum <= NumberOfUpSmoothValues / 2; smoothNum++)
upVec +=
preUpVectors[(num + points.Count + smoothNum) % points.Count];
upVec.Normalize();
// Find out if this road piece is upside down and if we are
// moving up or down. This is VERY important for catching loopings.
bool upsideDown = upVec.Z < -0.25f &&
lastUpVecUnmodified.Z < -0.05f;
bool movingUp = dir.Z > 0.75f;
bool movingDown = dir.Z < -0.75f;
//float changeAngle2 =
// GetAngleBetweenVectors(lastUpVec, upVec);
//if (num < 100)
// Log.Write("changeAngel2=" + changeAngle2);
// Mix in the last vector to make curves weaker
upVec = Vector3.Lerp(lastUpVec, upVec, CurveFactor);
upVec.Normalize();
// Store the last value to check for loopings.
lastUpVecUnmodified = upVec;
// Don't mix in default up if we head up or are upside down!
// Its very useful to know if we move up or down to fix the
// problematic areas at loopings by pointing stuff correct right away.
if (movingUp)
lastUpVec = Vector3.Lerp(upVec, -defaultUpVec, UpFactorCorrector);
else if (movingDown)
lastUpVec = Vector3.Lerp(upVec, defaultUpVec, UpFactorCorrector);
else if (upsideDown)
lastUpVec = Vector3.Lerp(upVec, -defaultUpVec, UpFactorCorrector);
else
lastUpVec = Vector3.Lerp(upVec, defaultUpVec, UpFactorCorrector);
// If we are very close to the ground, make the road point up more!
if (//upsideDown == false &&
landscape != null)
{
// Get landscape height here
float landscapeHeight = landscape.GetMapHeight(
points[num].pos.X, points[num].pos.Y);
// If point is close to the landscape, let everything point up more
if (points[num].pos.Z - landscapeHeight <
MinimumLandscapeDistance * 4)
lastUpVec = Vector3.Lerp(upVec, defaultUpVec,
1.75f * UpFactorCorrector);
} // if (upsideDown == false &&)
// And finally calculate rightVectors with just a cross product.
// Used to render the track later.
Vector3 rightVec = Vector3.Cross(dir, upVec);
rightVec.Normalize();
points[num].right = rightVec;
//*tst
// Recalculate up vector with help of right and dir.
// This makes the up vector to always point up 90 degrees.
upVec = Vector3.Cross(rightVec, dir);
upVec.Normalize();
points[num].up = upVec;
//*/
//// Make sure we never rotate the road more than a few degrees
//if (lastRightVec.Length() > 0)
//{
// float changeAngle =
// GetAngleBetweenVectors(lastRightVec, rightVec);
// if (num < 100)
// Log.Write("changeAngel=" + changeAngle);
//} // if (lastRightVec.Length)
//// Remember right vec for comparison in the next frame.
//lastRightVec = rightVec;
} // for (num)
#endregion
#region Smooth up vectors!
lastUpVec = points[0].up;
for (int num = 0; num < points.Count; num++)
preUpVectors[num] = points[num].up;
for (int num = 0; num < points.Count; num++)
{
// Interpolate up vectors again
Vector3 upVec = Vector3.Zero;
for (int smoothNum = -NumberOfUpSmoothValues;
smoothNum <= NumberOfUpSmoothValues; smoothNum++)
{
upVec +=
preUpVectors[(num + points.Count + smoothNum) % points.Count];
} // for (smoothNum)
upVec.Normalize();
points[num].up = upVec;
// Also rebuild right vector
Vector3 dir = points[num].dir;
points[num].right = Vector3.Cross(dir, upVec);
/*suxx
// Grab dir and up vector
Vector3 dir = points[num].dir;
Vector3 upVec = points[num].up;
/*suxx
// Compare with previous up vector
float changeAngle =
GetAngleBetweenVectors(lastUpVec, upVec);
/*tst
bool upsideDown = upVec.Z < -0.25f &&
lastUpVecUnmodified.Z < -0.05f;
bool movingUp = dir.Z > 0.75f;
bool movingDown = dir.Z < -0.75f;
lastUpVecUnmodified = upVec;
if (Math.Abs(changeAngle) > 0.02f &&
upsideDown == false &&
movingUp == false &&
movingDown == false)
{
points[num].up = Vector3.SmoothStep(lastUpVec, upVec, 0.33f);//.25f);
// Also rebuild right vector
points[num].right = Vector3.Cross(dir, points[num].up);
} // if (Math.Abs)
*/
/*suxx
//if (Math.Abs(changeAngle) > 0.02f)
{
points[num].up = Vector3.SmoothStep(lastUpVec, upVec, 0.05f);//.25f);
// Also rebuild right vector
points[num].right = Vector3.Cross(dir, points[num].up);
} // if (Math.Abs)
lastUpVec = upVec;
*/
//if (num < 100)
// Log.Write("changeAngel=" + changeAngle);
} // for (num)
#endregion
AdjustRoadWidths(widthHelpers);
GenerateUTextureCoordinates();
GenerateTunnelsAndLandscapeObjects(
roadHelpers, neutralObjects, landscape);
}
} // TrackLine(inputPointsFromColladaTrack)
#endregion
#region Load
/// <summary>
/// Load
/// </summary>
/// <param name="inputPoints">Input points</param>
/// <param name="widthHelpers">Width helpers</param>
/// <param name="roadHelpers">Road helpers</param>
/// <param name="neutralObjects">Neutral objects</param>
/// <param name="landscape">Landscape</param>
protected void Load(Vector3[] inputPoints,
List <TrackData.WidthHelper> widthHelpers,
List <TrackData.RoadHelper> roadHelpers,
List <TrackData.NeutralObject> neutralObjects,
Landscape landscape)
{
#region Kill all previously loaded data
points.Clear();
helperPositions.Clear();
// Kill all loaded objects
if (landscape != null)
{
landscape.KillAllLoadedObjects();
}
#endregion
#region Make sure we got valid data
if (inputPoints == null ||
inputPoints.Length < 3)
{
throw new ArgumentException("inputPoints is invalid, we need at " +
"least 3 valid input points to generate a TrackLine.");
}
#endregion
#region Check if all points are ABOVE the landscape
if (landscape != null)
{
// Go through all spline points
for (int num = 0; num < inputPoints.Length; num++)
{
// Get landscape height here
float landscapeHeight = landscape.GetMapHeight(
inputPoints[num].X, inputPoints[num].Y) +
// add little to fix ground errors
MinimumLandscapeDistance * 2.25f;
// And make sure we are always above it!
if (inputPoints[num].Z < landscapeHeight)
{
inputPoints[num].Z = landscapeHeight;
}
} // for (num)
// Second pass, check 24 interpolation points between all inputPoints
for (int num = 0; num < inputPoints.Length; num++)
{
for (int iter = 1; iter < 25; iter++)
{
float iterPercent = iter / 25.0f;
float iterHeight = inputPoints[num].Z * (1 - iterPercent) +
inputPoints[(num + 1) % inputPoints.Length].Z * iterPercent;
// Check 2x2 points (in all directions) to make sure
// we don't go through the landscape at the sides
for (int x = 0; x < 2; x++)
{
for (int y = 0; y < 2; y++)
{
// Also get height at middle to next pos
float landscapeHeight = landscape.GetMapHeight(
-5.0f + 10.0f * x +
inputPoints[num].X * (1 - iterPercent) +
inputPoints[(num + 1) % inputPoints.Length].X * iterPercent,
-5.0f + 10.0f * y +
inputPoints[num].Y * (1 - iterPercent) +
inputPoints[(num + 1) % inputPoints.Length].Y * iterPercent) +
// add little to fix ground errors
MinimumLandscapeDistance * 1.6f; // 1.5f;//1.25f;
// Increase both positions if this point is under the landscape
if (iterHeight < landscapeHeight)
{
float increaseHeight = landscapeHeight - iterHeight;
inputPoints[num].Z += increaseHeight;
inputPoints[(num + 1) % inputPoints.Length].Z +=
increaseHeight;
} // if (iterHeight)
} // for
}
} // for for (iter)
}
} // if (landscape)
//Log.Write("Input points: " + StringHelper.WriteArrayData(inputPoints));
#endregion
#region Search for any loopings indicated by 2 points above each other
// Go through all spline points (ignore first and last 3, this
// makes it easier to remove points and add new ones).
for (int num = 1; num < inputPoints.Length - 3; num++)
{
// X/Y distance has to be 4 times smaller than Z distance
Vector3 distVec = inputPoints[num + 1] - inputPoints[num];
float xyDist = (float)Math.Sqrt(
distVec.X * distVec.X + distVec.Y * distVec.Y);
float zDist = Math.Abs(distVec.Z);
// Also check if next point is down again.
Vector3 distVec2 = inputPoints[num + 2] - inputPoints[num + 1];
if (zDist / 2 > xyDist &&
Math.Abs(distVec.Z + distVec2.Z) < zDist / 2)
{
// Find out which direction we are going
Vector3 dir = inputPoints[num] - inputPoints[num - 1];
dir.Normalize();
Vector3 upVec = new Vector3(0, 0, 1);
Vector3 rightVec = Vector3.Cross(dir, upVec);
// Matrix build helper matrix to rotate our looping points
Matrix rotMatrix = new Matrix(
rightVec.X, rightVec.Y, rightVec.Z, 0,
dir.X, dir.Y, dir.Z, 0,
upVec.X, upVec.Y, upVec.Z, 0,
0, 0, 0, 1);
// Ok do a looping with zDist as height.
// Start with the current point, loop around and end with the
// point after the looping. We will remove the current and the
// next 2 points, but add 9 new points instead for our smooth loop.
// See LoopingPoints for the looping itself.
Vector3 startLoopPos = inputPoints[num];
Vector3 endLoopPos = inputPoints[num + 2];
// Insert 7 new points (9 new points, but we reuse
// start, middle and end points which are num, num+1 and num+2,
// plus an additional point after the looping to keep the road
// straight!)
Vector3[] remInputPoints = (Vector3[])inputPoints.Clone();
inputPoints = new Vector3[inputPoints.Length + 7];
// Copy everything over
for (int copyNum = 0; copyNum < remInputPoints.Length; copyNum++)
{
if (copyNum < num)
{
inputPoints[copyNum] = remInputPoints[copyNum];
}
else
{
inputPoints[copyNum + 7] = remInputPoints[copyNum];
}
}
// Ok, now we can add our loop
for (int loopNum = 0; loopNum < LoopingPoints.Length; loopNum++)
{
// Interpolate between start and end pos to land at the end pos!
float loopPercent = loopNum / (float)(LoopingPoints.Length - 1);
inputPoints[num + loopNum] =
startLoopPos * (1 - loopPercent) +
endLoopPos * loopPercent +
zDist * Vector3.Transform(LoopingPoints[loopNum], rotMatrix);
} // for (loopNum)
// Add extra point to keep the road straight
Vector3 newRoadDir =
inputPoints[num + 10] - inputPoints[num + 8];
// Don't go more than zDist * 2 units away!
if (newRoadDir.Length() > zDist * 2)
{
newRoadDir.Normalize();
newRoadDir = newRoadDir * zDist;
inputPoints[num + 9] = inputPoints[num + 8] + newRoadDir;
} // if (newRoadDir.Length)
else
{
// Just add an interpolation point
inputPoints[num + 9] =
(inputPoints[num + 8] + inputPoints[num + 10]) / 2.0f;
}
// Advance 10 points until we check for the next loop
num += 10;
// That's it, good work everyone ^^
} // if (zDist)
} // for (num)
#endregion
#region Generate all points with help of catmull rom splines
// Generate all points with help of catmull rom splines
for (int num = 0; num < inputPoints.Length; num++)
{
// Get the 4 required points for the catmull rom spline
Vector3 p1 = inputPoints[num - 1 < 0 ? inputPoints.Length - 1 : num - 1];
Vector3 p2 = inputPoints[num];
Vector3 p3 = inputPoints[(num + 1) % inputPoints.Length];
Vector3 p4 = inputPoints[(num + 2) % inputPoints.Length];
// Calculate number of iterations we use here based
// on the distance of the 2 points we generate new points from.
float distance = Vector3.Distance(p2, p3);
int numberOfIterations =
(int)(NumberOfIterationsPer100Meters * (distance / 100.0f));
if (numberOfIterations <= 0)
{
numberOfIterations = 1;
}
Vector3 lastPos = p1;
for (int iter = 0; iter < numberOfIterations; iter++)
{
TrackVertex newVertex = new TrackVertex(
Vector3.CatmullRom(p1, p2, p3, p4,
iter / (float)numberOfIterations));
lastPos = newVertex.pos;
points.Add(newVertex);
} // for (iter)
} // for (num)
#endregion
#region Generate up vectors, very important for our road building
// Pre up vectors are used to first generate all optimal up vectors
// for the track, but this is not useful for driving because we need
// the road to point up always except for loopings.
List <Vector3> preUpVectors = new List <Vector3>();
// Now generate all up vectors, first pass does optimal up vectors.
Vector3 defaultUpVec = new Vector3(0, 0, 1);
Vector3 lastUpVec = defaultUpVec;
for (int num = 0; num < points.Count; num++)
{
// Get direction we are driving in at this point,
// interpolate with help of last and next points.
Vector3 dir = points[(num + 1) % points.Count].pos -
points[num - 1 < 0 ? points.Count - 1 : num - 1].pos;
dir.Normalize();
// Now calculate the optimal up vector for this point
Vector3 middlePoint = (points[(num + 1) % points.Count].pos +
points[num - 1 < 0 ? points.Count - 1 : num - 1].pos) / 2.0f;
Vector3 optimalUpVector = middlePoint - points[num].pos;
if (optimalUpVector.Length() < 0.0001f)
{
optimalUpVector = lastUpVec;
}
optimalUpVector.Normalize();
// Store the optimalUpVectors in the preUpVectors list
preUpVectors.Add(optimalUpVector);
// Also save dir vector
points[num].dir = dir;
// And remember the last upVec in case the road is going straight ahead
lastUpVec = optimalUpVector;
} // for (num)
// Interpolate the first up vector for a smoother road at the start pos
preUpVectors[0] = preUpVectors[preUpVectors.Count - 1] + preUpVectors[1];
preUpVectors[0].Normalize();
#endregion
#region Interpolate the up vectors and also add the dir and right vectors
// Second pass, interpolated precalced values and apply our logic :)
//preUpVectors[0] =
lastUpVec = Vector3.Lerp(defaultUpVec, preUpVectors[0],
1.5f * CurveFactor * UpFactorCorrector);
//lastUpVec = preUpVectors[0];
Vector3 lastUpVecUnmodified = lastUpVec; // defaultUpVec;
Vector3 lastRightVec = Vector3.Zero;
for (int num = 0; num < points.Count; num++)
{
// Grab dir vector (could be calculated here too)
Vector3 dir = points[num].dir;
// First of all interpolate the preUpVectors
Vector3 upVec =
//single input: preUpVectors[num];
Vector3.Zero;
for (int smoothNum = -NumberOfUpSmoothValues / 2;
smoothNum <= NumberOfUpSmoothValues / 2; smoothNum++)
{
upVec +=
preUpVectors[(num + points.Count + smoothNum) % points.Count];
}
upVec.Normalize();
// Find out if this road piece is upside down and if we are
// moving up or down. This is VERY important for catching loopings.
bool upsideDown = upVec.Z < -0.25f &&
lastUpVecUnmodified.Z < -0.05f;
bool movingUp = dir.Z > 0.75f;
bool movingDown = dir.Z < -0.75f;
//float changeAngle2 =
// GetAngleBetweenVectors(lastUpVec, upVec);
//if (num < 100)
// Log.Write("changeAngel2=" + changeAngle2);
// Mix in the last vector to make curves weaker
upVec = Vector3.Lerp(lastUpVec, upVec, CurveFactor);
upVec.Normalize();
// Store the last value to check for loopings.
lastUpVecUnmodified = upVec;
// Don't mix in default up if we head up or are upside down!
// Its very useful to know if we move up or down to fix the
// problematic areas at loopings by pointing stuff correct right away.
if (movingUp)
{
lastUpVec = Vector3.Lerp(upVec, -defaultUpVec, UpFactorCorrector);
}
else if (movingDown)
{
lastUpVec = Vector3.Lerp(upVec, defaultUpVec, UpFactorCorrector);
}
else if (upsideDown)
{
lastUpVec = Vector3.Lerp(upVec, -defaultUpVec, UpFactorCorrector);
}
else
{
lastUpVec = Vector3.Lerp(upVec, defaultUpVec, UpFactorCorrector);
}
// If we are very close to the ground, make the road point up more!
if ( //upsideDown == false &&
landscape != null)
{
// Get landscape height here
float landscapeHeight = landscape.GetMapHeight(
points[num].pos.X, points[num].pos.Y);
// If point is close to the landscape, let everything point up more
if (points[num].pos.Z - landscapeHeight <
MinimumLandscapeDistance * 4)
{
lastUpVec = Vector3.Lerp(upVec, defaultUpVec,
1.75f * UpFactorCorrector);
}
} // if (upsideDown == false &&)
// And finally calculate rightVectors with just a cross product.
// Used to render the track later.
Vector3 rightVec = Vector3.Cross(dir, upVec);
rightVec.Normalize();
points[num].right = rightVec;
//*tst
// Recalculate up vector with help of right and dir.
// This makes the up vector to always point up 90 degrees.
upVec = Vector3.Cross(rightVec, dir);
upVec.Normalize();
points[num].up = upVec;
//*/
//// Make sure we never rotate the road more than a few degrees
//if (lastRightVec.Length() > 0)
//{
// float changeAngle =
// GetAngleBetweenVectors(lastRightVec, rightVec);
// if (num < 100)
// Log.Write("changeAngel=" + changeAngle);
//} // if (lastRightVec.Length)
//// Remember right vec for comparison in the next frame.
//lastRightVec = rightVec;
} // for (num)
#endregion
#region Smooth up vectors!
lastUpVec = points[0].up;
for (int num = 0; num < points.Count; num++)
{
preUpVectors[num] = points[num].up;
}
for (int num = 0; num < points.Count; num++)
{
// Interpolate up vectors again
Vector3 upVec = Vector3.Zero;
for (int smoothNum = -NumberOfUpSmoothValues;
smoothNum <= NumberOfUpSmoothValues; smoothNum++)
{
upVec +=
preUpVectors[(num + points.Count + smoothNum) % points.Count];
} // for (smoothNum)
upVec.Normalize();
points[num].up = upVec;
// Also rebuild right vector
Vector3 dir = points[num].dir;
points[num].right = Vector3.Cross(dir, upVec);
/*suxx
* // Grab dir and up vector
* Vector3 dir = points[num].dir;
* Vector3 upVec = points[num].up;
* /*suxx
* // Compare with previous up vector
* float changeAngle =
* GetAngleBetweenVectors(lastUpVec, upVec);
* /*tst
* bool upsideDown = upVec.Z < -0.25f &&
* lastUpVecUnmodified.Z < -0.05f;
* bool movingUp = dir.Z > 0.75f;
* bool movingDown = dir.Z < -0.75f;
* lastUpVecUnmodified = upVec;
* if (Math.Abs(changeAngle) > 0.02f &&
* upsideDown == false &&
* movingUp == false &&
* movingDown == false)
* {
* points[num].up = Vector3.SmoothStep(lastUpVec, upVec, 0.33f);//.25f);
* // Also rebuild right vector
* points[num].right = Vector3.Cross(dir, points[num].up);
* } // if (Math.Abs)
*/
/*suxx
* //if (Math.Abs(changeAngle) > 0.02f)
* {
* points[num].up = Vector3.SmoothStep(lastUpVec, upVec, 0.05f);//.25f);
* // Also rebuild right vector
* points[num].right = Vector3.Cross(dir, points[num].up);
* } // if (Math.Abs)
* lastUpVec = upVec;
*/
//if (num < 100)
// Log.Write("changeAngel=" + changeAngle);
} // for (num)
#endregion
AdjustRoadWidths(widthHelpers);
GenerateUTextureCoordinates();
GenerateTunnelsAndLandscapeObjects(
roadHelpers, neutralObjects, landscape);
} // Load(inputPoints, widthHelpers, roadHelpers)