//Build the mesh:
public void BuildMesh()
{
List <Knot> knots = spline.knots;
CatmullRomSpline.Marker marker = new CatmullRomSpline.Marker();
int maxPoint = meshBuilder.Vertices.Count;
float distance = 0;
Vector3 position = new Vector3(0, 0, 0);
Vector3 n = new Vector3(0, 0, 0);
Vector3 bn = new Vector3(0, 0, 0);
Vector3 t = new Vector3(0, 0, 0);
float r = 0;
for (int k = 0; k < 3; ++k)
{
int beginKnot = startKnot + k;
int endKnot = startKnot + k + 1;
float beginDistance = knotLengths[beginKnot];
float endDistance = knotLengths[endKnot];
int begin = (int)(beginDistance / trackLength);
int end = (int)(endDistance / trackLength);
float totalLength = endDistance - beginDistance;
float nextDistance = end * trackLength;
for (int i = begin; i < end; ++i)
{
if (i != 0 && beginKnot >= 3)
{
// place the marker at spline to get distance
distance = trackLength * i;
spline.PlaceMarker(marker, distance);
// get the variable needed for the point on spline
position = spline.GetPosition(marker);
splineTangent = spline.GetTangent(marker);
// finds transform for cursor at point in time
n = Vector3.Lerp(knotNormals[endKnot], knotNormals[beginKnot], (endDistance - distance) / totalLength);
bn = Vector3.Lerp(knotBinormals[endKnot], knotBinormals[beginKnot], (endDistance - distance) / totalLength);
t = Vector3.Lerp(knotTangents[endKnot], knotTangents[beginKnot], (endDistance - distance) / totalLength);
r = Mathf.Lerp(knotRadius[endKnot], knotRadius[beginKnot], (endDistance - distance) / totalLength);
if (first)
{
first = false;
firstPosition = position;
firstNormal = n;
firstBinormal = bn;
firstTangent = t;
firstRadius = r;
}
if (i * (m_RadialSegmentCount + 1) >= maxPoint)
{
BuildNewShape(position, n, bn, t, r, meshBuilder.Vertices.Count > 0); // add new vertices
}
else
{
BuildExistingShape(position, n, bn, t, r, i); // update vertices and normals*/
}
}
}
}
++startKnot;
lastPosition = position;
lastNormal = n;
lastBinormal = bn;
lastTangent = t;
lastRadius = r;
//If the MeshFilter exists, attach the new mesh to it.
//Assuming the GameObject also has a renderer attached, our new mesh will now be visible in the scene.
if (filter != null)
{
filter.sharedMesh = meshBuilder.CreateMesh();
}
}
private void RenderMesh()
{
if (advancedParameters.nbSegmentToParametrize == 0)
{
spline.Parametrize();
}
else
{
spline.Parametrize(spline.NbSegments - advancedParameters.nbSegmentToParametrize, spline.NbSegments);
}
float length = Mathf.Max(spline.Length() - 0.1f, 0);
int nbQuad = ((int)(1f / width * length)) + 1 - quadOffset;
if (allocatedNbQuad < nbQuad) //allocate more memory for the mesh
{
Reallocate(nbQuad);
length = Mathf.Max(spline.Length() - 0.1f, 0);
nbQuad = ((int)(1f / width * length)) + 1 - quadOffset;
}
int startingQuad = lastStartingQuad;
float lastDistance = startingQuad * width + quadOffset * width;
maxInstanciedTriCount = System.Math.Max(maxInstanciedTriCount, (nbQuad - 1) * NbTriIndexPerQuad);
Vector3 n = normal;
if (dynamicNormalUpdate)
{
if (n == Vector3.zero)
{
n = (transform.position - Camera.main.transform.position).normalized;
}
for (int i = 0; i < normals.Length; i++)
{
normals[i] = n;
}
}
CatmullRomSpline.Marker marker = new CatmullRomSpline.Marker();
spline.PlaceMarker(marker, lastDistance);
Vector3 lastPosition = spline.GetPosition(marker);
Vector3 lastTangent = spline.GetTangent(marker);
Vector3 lastBinormal = CatmullRomSpline.ComputeBinormal(lastTangent, n);
int drawingEnd = meshDisposition == MeshDisposition.Fragmented ? nbQuad - 1 : nbQuad - 1;
float startingDist = lastDistance;
for (int i = startingQuad; i < drawingEnd; i++)
{
float distance = lastDistance + width;
int firstVertexIndex = i * NbVertexPerQuad;
int firstTriIndex = i * NbTriIndexPerQuad;
spline.MoveMarker(marker, distance);
Vector3 position = spline.GetPosition(marker);
Vector3 tangent = spline.GetTangent(marker);
Vector3 binormal = CatmullRomSpline.ComputeBinormal(tangent, n);
float h = FadeMultiplier(lastDistance, length);
float h2 = FadeMultiplier(distance, length);
float rh = h * height, rh2 = h2 * height;
if (fadeType == FadeType.Alpha || fadeType == FadeType.None)
{
rh = h > 0 ? height : 0;
rh2 = h2 > 0 ? height : 0;
}
if (meshDisposition == MeshDisposition.Continuous)
{
vertices[firstVertexIndex] = transform.InverseTransformPoint(lastPosition - origin + (lastBinormal * (rh * 0.5f)));
vertices[firstVertexIndex + 1] = transform.InverseTransformPoint(lastPosition - origin + (-lastBinormal * (rh * 0.5f)));
vertices[firstVertexIndex + 2] = transform.InverseTransformPoint(position - origin + (binormal * (rh2 * 0.5f)));
vertices[firstVertexIndex + 3] = transform.InverseTransformPoint(position - origin + (-binormal * (rh2 * 0.5f)));
uv[firstVertexIndex] = new Vector2(lastDistance / height, 1);
uv[firstVertexIndex + 1] = new Vector2(lastDistance / height, 0);
uv[firstVertexIndex + 2] = new Vector2(distance / height, 1);
uv[firstVertexIndex + 3] = new Vector2(distance / height, 0);
}
else
{
Vector3 pos = lastPosition + (lastTangent * width * -0.5f) - origin;
vertices[firstVertexIndex] = transform.InverseTransformPoint(pos + (lastBinormal * (rh * 0.5f)));
vertices[firstVertexIndex + 1] = transform.InverseTransformPoint(pos + (-lastBinormal * (rh * 0.5f)));
vertices[firstVertexIndex + 2] = transform.InverseTransformPoint(pos + (lastTangent * width) + (lastBinormal * (rh * 0.5f)));
vertices[firstVertexIndex + 3] = transform.InverseTransformPoint(pos + (lastTangent * width) + (-lastBinormal * (rh * 0.5f)));
uv[firstVertexIndex] = new Vector2(0, 1);
uv[firstVertexIndex + 1] = new Vector2(0, 0);
uv[firstVertexIndex + 2] = new Vector2(1, 1);
uv[firstVertexIndex + 3] = new Vector2(1, 0);
}
float relLength = length - startingDist;
uv2[firstVertexIndex] = new Vector2((lastDistance - startingDist) / relLength, 1);
uv2[firstVertexIndex + 1] = new Vector2((lastDistance - startingDist) / relLength, 0);
uv2[firstVertexIndex + 2] = new Vector2((distance - startingDist) / relLength, 1);
uv2[firstVertexIndex + 3] = new Vector2((distance - startingDist) / relLength, 0);
triangles[firstTriIndex] = firstVertexIndex;
triangles[firstTriIndex + 1] = firstVertexIndex + 1;
triangles[firstTriIndex + 2] = firstVertexIndex + 2;
triangles[firstTriIndex + 3] = firstVertexIndex + 2;
triangles[firstTriIndex + 4] = firstVertexIndex + 1;
triangles[firstTriIndex + 5] = firstVertexIndex + 3;
colors[firstVertexIndex] = vertexColor;
colors[firstVertexIndex + 1] = vertexColor;
colors[firstVertexIndex + 2] = vertexColor;
colors[firstVertexIndex + 3] = vertexColor;
if (fadeType == FadeType.Alpha || fadeType == FadeType.Both)
{
colors[firstVertexIndex].a *= h;
colors[firstVertexIndex + 1].a *= h;
colors[firstVertexIndex + 2].a *= h2;
colors[firstVertexIndex + 3].a *= h2;
}
lastPosition = position;
lastTangent = tangent;
lastBinormal = binormal;
lastDistance = distance;
}
for (int i = (nbQuad - 1) * NbTriIndexPerQuad; i < maxInstanciedTriCount; i++) //clear a few tri ahead
{
triangles[i] = 0;
}
lastStartingQuad = advancedParameters.lengthToRedraw == 0 ?
System.Math.Max(0, nbQuad - ((int)(maxLength / width) + 5)) :
System.Math.Max(0, nbQuad - ((int)(advancedParameters.lengthToRedraw / width) + 5));
mesh.Clear();
mesh.vertices = vertices;
mesh.uv = uv;
mesh.uv2 = uv2;
mesh.triangles = triangles;
mesh.colors = colors;
mesh.normals = normals;
}
//Build the mesh:
public void UpdateMesh()
{
List <Knot> knots = spline.knots;
CatmullRomSpline.Marker marker = new CatmullRomSpline.Marker();
int maxPoint = meshBuilder.Vertices.Count;
Vector3 position = new Vector3(0, 0, 0);
Vector3 lastPosition = new Vector3(0, 0, 0);
Vector3 t = new Vector3(0, 0, 0);
for (int k = 0; k < 3; ++k)
{
int beginKnot = startKnot + k;
int endKnot = startKnot + k + 1;
float beginDistance = knotLengths[beginKnot];
float endDistance = knotLengths[endKnot];
int begin = (int)(beginDistance / trackLength);
int end = (int)(endDistance / trackLength);
float totalLength = endDistance - beginDistance;
spline.PlaceMarker(marker, trackLength * begin - 1);
lastPosition = spline.GetPosition(marker);
for (int i = begin; i < end; ++i)
{
// place the marker at spline to get distance
float distance = trackLength * i;
spline.PlaceMarker(marker, distance);
// get the variable needed for the point on spline
position = spline.GetPosition(marker);
// finds transform for cursor at point in time
Vector3 bn = Vector3.Lerp(knotBinormals[endKnot], knotBinormals[beginKnot], (endDistance - distance) / totalLength);
// find via cross product
Vector3 normal = Vector3.Cross(position - lastPosition, bn);
Vector3 linePoint = bn * 0.5f;
// find points for mesh vertices
Vector3 point = position + linePoint;
Vector3 point2 = position - linePoint;
// build or update mesh
if (i * 4 >= maxPoint)
{
BuildQuad(meshBuilder, point, point2, normal);
}
else
{
UpdateQuad(meshBuilder, point, point2, normal, i);
}
// gets last position
lastPosition = position;
}
}
++startKnot;
// creates mesh for filter and renderer
CreateMesh();
}
public void CreateMeshTrail()
{
// creates a new mesh builder for generating mesh
meshBuilder = new MeshBuilder();
// find the max count of control points
int max = 0;
for (int i = 0; i < lineList.Count; ++i)
{
if (max < lineList[i].Count)
{
max = lineList[i].Count;
}
}
// redistribute points for lines with smaller number of control points
for (int i = 0; i < lineList.Count; ++i)
{
// if line does not have enough control points
if (max > lineList[i].Count)
{
List <Vector3> l = new List <Vector3>();
float frac1 = 0;
float frac2 = 0;
int index = 1;
// add beginning point
l.Add(lineList[i][0]);
// interpolate between two points
for (int j = 1; j < lineList[i].Count; ++j)
{
frac1 = (float)index / (max - 1);
frac2 = (float)j / (lineList[i].Count - 1);
// if the point is distributed between the 2 control point
while (frac1 < frac2)
{
Vector3 diff = (lineList[i][j] - lineList[i][j - 1]);
l.Add(lineList[i][j - 1] + diff * frac1);
++index;
frac1 = (float)index / (max - 1);
}
// endpoint of the 2 control point
l.Add(lineList[i][j]);
++index;
}
lineList[i] = l;
}
}
if (smooth) // create smooth sections
{
List <Vector3> listA;
CatmullRomSpline spline;
splineList = new List <CatmullRomSpline>();
// generate the splines
for (int j = 0; j < lineList[0].Count; ++j) // cycle the jth point of all lines
{
spline = new CatmullRomSpline();
for (int i = 0; i < lineList.Count; ++i) // cycle through all the lines
{
listA = lineList[i];
if (i == 0 || i == lineList.Count - 1)
{
for (int n = 0; n < 3; ++n)
{
spline.knots.Add(new Knot(listA[j]));
}
}
else
{
spline.knots.Add(new Knot(listA[j]));
}
}
spline.Parametrize();
splineList.Add(spline);
}
// find the maxlength for division
float maxLength = -1;
for (int i = 0; i < splineList.Count; ++i)
{
if (maxLength < splineList[i].Length())
{
maxLength = splineList[i].Length();
}
}
float trackLength = 0.01f;
int maxCount = (int)(maxLength / trackLength);
int total = 0;
int offset = 1;
CatmullRomSpline.Marker marker = new CatmullRomSpline.Marker();
// Render the trail, spline by spline
Vector3 posA;
Vector3 posB;
Vector3 tangentA;
Vector3 tangentB;
// NOTE: Creates SEPARATE quad spline
// Quad 0: spline 0 and spline 1
// Quad 1: spline 1 and spline 2
// Quad 2: spline 2 and spline 3 .. etc
for (int i = 0; i < splineList.Count - 1; ++i)
{
CatmullRomSpline splineA = splineList[i];
CatmullRomSpline splineB = splineList[i + 1];
for (int j = offset; j < maxCount; ++j)
{
// grab positions and tangents
splineA.PlaceMarker(marker, j * splineA.Length() / maxCount);
posA = splineA.GetPosition(marker);
tangentA = splineA.GetTangent(marker);
splineB.PlaceMarker(marker, j * splineB.Length() / maxCount);
posB = splineB.GetPosition(marker);
tangentB = splineB.GetTangent(marker);
// calculate the normals
Vector3 normalA = Vector3.Cross((posA - posB), tangentA).normalized;
Vector3 normalB = Vector3.Cross(tangentB, (posB - posA)).normalized;
// build the splines
BuildQuadSpline(meshBuilder, posA, posB, normalA, normalB, total, false);
}
// update offset for rendering separate quad splines
total = meshBuilder.Vertices.Count;
}
}
else // create smooth sections
{
List <Vector3> listA;
List <Vector3> listB;
int total = 0;
for (int j = 0; j < lineList[0].Count - 1; ++j)
{
for (int i = 0; i < lineList.Count - 1; ++i)
{
listA = lineList[i];
listB = lineList[i + 1];
BuildQuad(meshBuilder, listA[j], listB[j], listA[j + 1], listB[j + 1], total);
}
total = meshBuilder.Vertices.Count;
}
}
BuildMesh();
}
//Build the mesh:
public void BuildMesh()
{
CatmullRomSpline.Marker marker = new CatmullRomSpline.Marker();
int maxPoint = meshBuilder.Vertices.Count;
Vector3 position = new Vector3(0, 0, 0);
Vector3 t = new Vector3(0, 0, 0);
float width = 0;
float height = 0;
float thickness = 0;
for (int k = 0; k < 3; ++k)
{
int beginKnot = startKnot + k;
int endKnot = startKnot + k + 1;
float beginDistance = knotLengths[beginKnot];
float endDistance = knotLengths[endKnot];
int begin = (int)(beginDistance / trackLength);
int end = (int)(endDistance / trackLength);
float totalLength = endDistance - beginDistance;
for (int i = begin; i < end; ++i)
{
if (i != 0 && beginKnot >= 3)
{
// place the marker at spline to get distance
float distance = trackLength * i;
spline.PlaceMarker(marker, distance);
// get the variable needed for the point on spline
position = spline.GetPosition(marker);
splineTangent = spline.GetTangent(marker);
// finds transform for cursor at point in time
Vector3 n = Vector3.Lerp(knotNormals[endKnot], knotNormals[beginKnot], (endDistance - distance) / totalLength);
Vector3 bn = Vector3.Lerp(knotBinormals[endKnot], knotBinormals[beginKnot], (endDistance - distance) / totalLength);
t = Vector3.Lerp(knotTangents[endKnot], knotTangents[beginKnot], (endDistance - distance) / totalLength);
width = Mathf.Lerp(knotWidth[endKnot], knotWidth[beginKnot], (endDistance - distance) / totalLength);
height = Mathf.Lerp(knotHeight[endKnot], knotHeight[beginKnot], (endDistance - distance) / totalLength);
thickness = Mathf.Lerp(knotThickness[endKnot], knotThickness[beginKnot], (endDistance - distance) / totalLength);
if (first)
{
first = false;
firstPosition = position;
firstNormal = n;
firstBinormal = bn;
firstTangent = t;
firstWidth = width;
firstHeight = height;
firstThickness = thickness;
}
// setup shape for specified section
SetupShape(n, bn, t, width, height, thickness);
if (i * (shapePoints.Length) >= maxPoint)
{
BuildNewShape(position, meshBuilder.Vertices.Count > 0); // add new vertices
}
else
{
BuildExistingShape(position, i); // update vertices and normals*/
}
}
}
}
lastTangent = t;
lastPosition = position;
++startKnot;
//If the MeshFilter exists, attach the new mesh to it.
//Assuming the GameObject also has a renderer attached, our new mesh will now be visible in the scene.
if (filter != null)
{
filter.sharedMesh = meshBuilder.CreateMesh();
}
}
// create mesh for curved extrusion
public void CreateMeshTrail(float nValue)
{
// throws out previous mesh if nValue is set
List <Knot> knots = spline.knots;
CatmullRomSpline.Marker marker = new CatmullRomSpline.Marker();
CatmullRomSpline.Marker markerSide = new CatmullRomSpline.Marker();
int maxPoint = meshBuilder.Vertices.Count;
Vector3 position = new Vector3(0, 0, 0);
Vector3 sidePos = new Vector3(0, 0, 0);
Vector3 normPos = new Vector3(0, 0, 1f) * nValue;
// makes points based on the distance segments
int begin = 0;
int end = (int)(spline.Length() / trackLength);
int beginSide = (int)(knotLengths[0] / trackLength);
int endSide = (int)(splineSide.Length() / trackLength);
int offset = 5;
int totalPoints = end - begin - offset;
int totalPointsSide = (int)(splineSide.Length() / trackLength) - begin - offset;
totalPoints *= 2;
totalPointsSide *= 2;
// IMPORTANT!!! : DEPENDS UPON THE CONSTRAINTS
// calculates the normal in order to determine the render direction
// place the marker at spline to get distance
bool reverse = true;
// Restarts rendering if a volume is being generated
if (nValue <= -0.01f || nValue >= 0.01f)
{
beginSide = 0;
meshBuilder = new MeshBuilder();
spline.PlaceMarker(marker, trackLength * offset);
splineSide.PlaceMarker(markerSide, 0);
Vector3 diffSide = splineSide.GetPosition(markerSide);
splineSide.PlaceMarker(markerSide, trackLength * (endSide - 1));
diffSide -= splineSide.GetPosition(markerSide);
diffSide = new Vector3(diffSide.x, 0, 0);
print("Normal: " + normPos);
print("Tangent: " + spline.GetTangent(marker));
print("Side: " + diffSide);
print("Cross: " + Vector3.Cross(spline.GetTangent(marker), normPos));
reverse = (Vector3.Dot(Vector3.Cross(spline.GetTangent(marker), normPos), diffSide) > 0);
if (reverse)
{
print("REVERSE!");
}
else
{
print("FORWARD!");
}
}
beginSide = (offset > beginSide) ? offset : beginSide;
// iterate through the entire path of the spline
for (int j = beginSide; j < endSide; ++j)
{
// place the marker at spline to get distance
splineSide.PlaceMarker(marker, trackLength * j);
sidePos = splineSide.GetPosition(marker);
Vector3 sideTangent = splineSide.GetTangent(marker);
for (int i = begin + offset; i < end; ++i)
{
// place the marker at spline to get distance
spline.PlaceMarker(marker, trackLength * i);
// get the variable needed for the point on spline
position = spline.GetPosition(marker) + sidePos;
Vector3 tangent = spline.GetTangent(marker);
Vector3 normal = normPos.normalized;
// build or update mesh
if (nValue > -0.01f && nValue < 0.01f)
{
if ((j - offset) >= meshBuilder.Vertices.Count / totalPoints)
{
BuildQuadSpline(meshBuilder, position, normal, totalPoints, Vector3.zero, Vector3.zero, 0, reverse);
}
else
{
UpdateQuadSpline(meshBuilder, position, normal, totalPoints, Vector3.zero, Vector3.zero, i - offset, j - offset, reverse);
}
}
else
{
Vector3 startPos = Vector3.zero;
Vector3 endPos = normPos;
if ((j - offset) >= meshBuilder.Vertices.Count / totalPoints)
{
BuildQuadSpline(meshBuilder, position, normal, totalPoints, startPos, endPos, 0, reverse);
}
else
{
UpdateQuadSpline(meshBuilder, position, normal, totalPoints, startPos, endPos, i - offset, j - offset, reverse);
}
}
}
}
// detect if there is a structure or not
if (nValue <= -0.01f || nValue >= 0.01f)
{
int p = meshBuilder.Vertices.Count;
// build sides out of the spline
splineSide.PlaceMarker(marker, trackLength * offset);
Vector3 startPos = splineSide.GetPosition(marker);
splineSide.PlaceMarker(marker, trackLength * (endSide - 1));
Vector3 endPos = splineSide.GetPosition(marker);
for (int j = 0; j < 2; ++j)
{
for (int i = begin + offset; i < end; ++i)
{
// place the marker at spline to get distance
spline.PlaceMarker(marker, trackLength * i);
// get the variable needed for the point on spline
position = spline.GetPosition(marker);
if (j == 1)
{
position += normPos;
}
Vector3 tangent = spline.GetTangent(marker);
Vector3 normal = Vector3.Cross(tangent, normPos).normalized;
BuildQuadSpline(meshBuilder, position, normal, totalPoints, endPos, startPos, p, reverse);
}
}
p = meshBuilder.Vertices.Count;
// build caps out of the side spline
spline.PlaceMarker(marker, trackLength * offset);
startPos = spline.GetPosition(marker);
spline.PlaceMarker(marker, trackLength * (end - 1));
endPos = spline.GetPosition(marker);
for (int j = 0; j < 2; ++j)
{
for (int i = begin + offset; i < endSide; ++i)
{
// place the marker at spline to get distance
splineSide.PlaceMarker(marker, trackLength * i);
// get the variable needed for the point on spline
position = splineSide.GetPosition(marker);
if (j == 1)
{
position += normPos;
}
Vector3 tangent = splineSide.GetTangent(marker);
Vector3 normal = Vector3.Cross(tangent, normPos).normalized;
BuildQuadSpline(meshBuilder, position, normal, totalPointsSide, startPos, endPos, p, reverse);
}
}
}
filter.sharedMesh = meshBuilder.CreateMesh();
}