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;
}