/**
* Iterative version of the Ramer-Douglas-Peucker path decimation algorithm.
*/
private bool Decimate(ObiList <ObiPathFrame> input, ObiList <ObiPathFrame> output, float threshold)
{
// no decimation, no work to do, just return:
if (threshold < 0.00001f || input.Count < 3)
{
return(false);
}
float scaledThreshold = threshold * threshold * 0.01f;
stack.Push(new Vector2Int(0, input.Count - 1));
var bitArray = new BitArray(input.Count, true);
while (stack.Count > 0)
{
var range = stack.Pop();
float dmax = 0;
int index = range.x;
float mu = 0;
for (int i = index + 1; i < range.y; ++i)
{
if (bitArray[i])
{
float d = Vector3.SqrMagnitude(ObiUtils.ProjectPointLine(input[i].position, input[range.x].position, input[range.y].position, out mu) - input[i].position);
if (d > dmax)
{
index = i;
dmax = d;
}
}
}
if (dmax > scaledThreshold)
{
stack.Push(new Vector2Int(range.x, index));
stack.Push(new Vector2Int(index, range.y));
}
else
{
for (int i = range.x + 1; i < range.y; ++i)
{
bitArray[i] = false;
}
}
}
output.Clear();
for (int i = 0; i < bitArray.Count; ++i)
{
if (bitArray[i])
{
output.Add(input[i]);
}
}
return(true);
}
public ObiPathFrame GetSectionAt(float mu)
{
float edgeMu = smoothSections * Mathf.Clamp01(mu);
int index = (int)edgeMu;
float sectionMu = edgeMu - index;
int counter = 0;
int chunkIndex = -1;
int indexInChunk = -1;
for (int i = 0; i < smoothChunks.Count; ++i)
{
if (counter + smoothChunks[i].Count > index)
{
chunkIndex = i;
indexInChunk = index - counter;
}
counter += smoothChunks[i].Count;
}
ObiList <ObiPathFrame> chunk = smoothChunks[chunkIndex];
ObiPathFrame s1 = chunk[indexInChunk];
ObiPathFrame s2 = chunk[Mathf.Min(indexInChunk + 1, chunk.Count - 1)];
return((1 - sectionMu) * s1 + sectionMu * s2);
}
private float CalculateChunkLength(ObiList <ObiPathFrame> chunk)
{
float length = 0;
for (int i = 1; i < chunk.Count; ++i)
{
length += Vector3.Distance(chunk[i].position, chunk[i - 1].position);
}
return(length);
}
protected float CalculateCurveLength(ObiList <ObiCurveSection> curve)
{
float length = 0;
for (int i = 1; i < curve.Count; ++i)
{
length += Vector3.Distance(curve[i].positionAndRadius, curve[i - 1].positionAndRadius);
}
return(length);
}
/**
* This method uses a variant of Chainkin's algorithm to produce a smooth curve from a set of control points. It is specially fast
* because it directly calculates subdivision level k, instead of recursively calculating levels 1..k.
*/
private void Chaikin(ObiList <ObiPathFrame> input, ObiList <ObiPathFrame> output, uint k)
{
// no subdivision levels, no work to do. just copy the input to the output:
if (k == 0 || input.Count < 3)
{
output.SetCount(input.Count);
for (int i = 0; i < input.Count; ++i)
{
output[i] = input[i];
}
return;
}
// calculate amount of new points generated by each inner control point:
int pCount = (int)Mathf.Pow(2, k);
// precalculate some quantities:
int n0 = input.Count - 1;
float twoRaisedToMinusKPlus1 = Mathf.Pow(2, -(k + 1));
float twoRaisedToMinusK = Mathf.Pow(2, -k);
float twoRaisedToMinus2K = Mathf.Pow(2, -2 * k);
float twoRaisedToMinus2KMinus1 = Mathf.Pow(2, -2 * k - 1);
// allocate ouput:
output.SetCount((n0 - 1) * pCount + 2);
// calculate initial curve points:
output[0] = (0.5f + twoRaisedToMinusKPlus1) * input[0] + (0.5f - twoRaisedToMinusKPlus1) * input[1];
output[pCount * n0 - pCount + 1] = (0.5f - twoRaisedToMinusKPlus1) * input[n0 - 1] + (0.5f + twoRaisedToMinusKPlus1) * input[n0];
// calculate internal points:
for (int j = 1; j <= pCount; ++j)
{
// precalculate coefficients:
float F = 0.5f - twoRaisedToMinusKPlus1 - (j - 1) * (twoRaisedToMinusK - j * twoRaisedToMinus2KMinus1);
float G = 0.5f + twoRaisedToMinusKPlus1 + (j - 1) * (twoRaisedToMinusK - j * twoRaisedToMinus2K);
float H = (j - 1) * j * twoRaisedToMinus2KMinus1;
for (int i = 1; i < n0; ++i)
{
ObiPathFrame.WeightedSum(F, G, H,
ref input.Data[i - 1],
ref input.Data[i],
ref input.Data[i + 1],
ref output.Data[(i - 1) * pCount + j]);
}
}
// make first and last curve points coincide with original points:
output[0] = input[0];
output[output.Count - 1] = input[input.Count - 1];
}
/**
* Generate a list of smooth curves using particles as control points. Will take into account cuts in the rope,
* generating one curve for each continuous piece of rope.
*/
public void SmoothCurvesFromParticles()
{
curves.Clear();
curveSections = 0;
curveLength = 0;
// count amount of segments in each rope chunk:
CountContinuousSegments();
ObiDistanceConstraintBatch distanceBatch = DistanceConstraints.GetFirstBatch();
Matrix4x4 w2l = transform.worldToLocalMatrix;
int firstSegment = 0;
// generate curve for each rope chunk:
for (int i = 0; i < rawCurves.Count; ++i)
{
int segments = rawCurves[i].Count - 1;
// allocate memory for the curve:
ObiList <CurveSection> controlPoints = rawCurves[i];
// get control points position:
for (int m = 0; m < segments; ++m)
{
int particleIndex = distanceBatch.springIndices[(firstSegment + m) * 2];
controlPoints[m] = new CurveSection(w2l.MultiplyPoint3x4(GetParticlePosition(particleIndex)),
solidRadii[particleIndex],
(this.colors != null && particleIndex < this.colors.Length) ? this.colors[particleIndex] : Color.white);
// last segment adds its second particle too:
if (m == segments - 1)
{
particleIndex = distanceBatch.springIndices[(firstSegment + m) * 2 + 1];
controlPoints[m + 1] = new CurveSection(w2l.MultiplyPoint3x4(GetParticlePosition(particleIndex)),
solidRadii[particleIndex],
(this.colors != null && particleIndex < this.colors.Length) ? this.colors[particleIndex] : Color.white);
}
}
firstSegment += segments;
// get smooth curve points:
ChaikinSmoothing(controlPoints, curves[i], smoothing);
// count total curve sections and total curve length:
curveSections += curves[i].Count - 1;
curveLength += CalculateCurveLength(curves[i]);
}
}
// Update is called once per frame
void UpdatePlugs(ObiActor actor)
{
var rope = actor as ObiRopeBase;
// cache the rope's transform matrix/quaternion:
Matrix4x4 l2w = rope.transform.localToWorldMatrix;
Quaternion l2wRot = l2w.rotation;
int instanceIndex = 0;
// place prefabs at the start/end of each curve:
for (int c = 0; c < smoother.smoothChunks.Count; ++c)
{
ObiList <ObiPathFrame> curve = smoother.smoothChunks[c];
if ((plugTears && c > 0) ||
(plugStart && c == 0))
{
var instance = GetOrCreatePrefabInstance(instanceIndex++);
instance.SetActive(true);
ObiPathFrame frame = curve[0];
instance.transform.position = l2w.MultiplyPoint3x4(frame.position);
instance.transform.rotation = l2wRot * (Quaternion.LookRotation(-frame.tangent, frame.binormal));
instance.transform.localScale = instanceScale;
}
if ((plugTears && c < smoother.smoothChunks.Count - 1) ||
(plugEnd && c == smoother.smoothChunks.Count - 1))
{
var instance = GetOrCreatePrefabInstance(instanceIndex++);
instance.SetActive(true);
ObiPathFrame frame = curve[curve.Count - 1];
instance.transform.position = l2w.MultiplyPoint3x4(frame.position);
instance.transform.rotation = l2wRot * (Quaternion.LookRotation(frame.tangent, frame.binormal));
instance.transform.localScale = instanceScale;
}
}
// deactivate remaining instances:
for (int i = instanceIndex; i < instances.Count; ++i)
{
instances[i].SetActive(false);
}
}
/**
* Generate a list of smooth curves using particles as control points. Will take into account cuts in the rope,
* generating one curve for each continuous piece of rope.
*/
public void SmoothCurvesFromParticles()
{
curves.Clear();
curveSections = 0;
curveLength = 0;
// count amount of segments in each rope chunk:
CountContinuousSegments();
Matrix4x4 w2l = transform.worldToLocalMatrix;
Quaternion matrixRotation = Quaternion.LookRotation(
w2l.GetColumn(2),
w2l.GetColumn(1));
int firstSegment = 0;
// generate curve for each rope chunk:
for (int i = 0; i < rawCurves.Count; ++i)
{
int segments = rawCurves[i].Count - 1;
// allocate memory for the curve:
ObiList <ObiCurveSection> controlPoints = rawCurves[i];
// get control points position:
int lastParticle = -1;
int particle1 = -1, particle2 = -1;
for (int m = 0; m < segments; ++m)
{
if (GetStructuralConstraintParticles(firstSegment + m, ref particle1, ref particle2))
{
if (m == 0)
{
lastParticle = particle1;
}
// Find next and previous vectors:
Vector3 nextV = GetParticlePosition(particle2) - GetParticlePosition(particle1);
Vector3 prevV = GetParticlePosition(particle1) - GetParticlePosition(lastParticle);
Vector3 pos = w2l.MultiplyPoint3x4(GetParticlePosition(particle1));
Quaternion orient = matrixRotation * Quaternion.SlerpUnclamped(GetParticleOrientation(lastParticle), GetParticleOrientation(particle1), 0.5f);
Vector3 tangent = w2l.MultiplyVector(prevV + nextV).normalized;
Color color = (this.colors != null && particle1 < this.colors.Length) ? this.colors[particle1] : Color.white;
controlPoints[m] = new ObiCurveSection(new Vector4(pos.x, pos.y, pos.z, principalRadii[particle1][0]), tangent, orient * Vector3.up, color);
lastParticle = particle1;
}
}
// last segment adds its second particle too:
if (segments > 0)
{
Vector3 pos = w2l.MultiplyPoint3x4(GetParticlePosition(particle2));
Quaternion orient = matrixRotation * GetParticleOrientation(particle1);
Vector3 tangent = w2l.MultiplyVector(GetParticlePosition(particle2) - GetParticlePosition(particle1)).normalized;
Color color = (this.colors != null && particle2 < this.colors.Length) ? this.colors[particle2] : Color.white;
controlPoints[segments] = new ObiCurveSection(new Vector4(pos.x, pos.y, pos.z, principalRadii[particle2][0]), tangent, orient * Vector3.up, color);
}
firstSegment += segments;
// get smooth curve points:
ObiCurveFrame.Chaikin(controlPoints, curves[i], smoothing);
// count total curve sections and total curve length:
curveSections += curves[i].Count - 1;
curveLength += CalculateCurveLength(curves[i]);
}
}
public void UpdateRenderer(ObiActor actor)
{
using (m_UpdateExtrudedRopeRendererChunksPerfMarker.Auto())
{
if (section == null)
{
return;
}
var rope = actor as ObiRopeBase;
CreateMeshIfNeeded();
ClearMeshData();
int sectionIndex = 0;
int sectionSegments = section.Segments;
int verticesPerSection = sectionSegments + 1; // the last vertex in each section must be duplicated, due to uv wraparound.
float vCoord = -uvScale.y * rope.restLength * uvAnchor; // v texture coordinate.
float actualToRestLengthRatio = smoother.SmoothLength / rope.restLength;
Vector3 vertex = Vector3.zero, normal = Vector3.zero;
Vector4 texTangent = Vector4.zero;
Vector2 uv = Vector2.zero;
for (int c = 0; c < smoother.smoothChunks.Count; ++c)
{
ObiList <ObiPathFrame> curve = smoother.smoothChunks[c];
for (int i = 0; i < curve.Count; ++i)
{
// Calculate previous and next curve indices:
int prevIndex = Mathf.Max(i - 1, 0);
// advance v texcoord:
vCoord += uvScale.y * (Vector3.Distance(curve.Data[i].position, curve.Data[prevIndex].position) /
(normalizeV ? smoother.SmoothLength : actualToRestLengthRatio));
// calculate section thickness and scale the basis vectors by it:
float sectionThickness = curve.Data[i].thickness * thicknessScale;
// Loop around each segment:
int nextSectionIndex = sectionIndex + 1;
for (int j = 0; j <= sectionSegments; ++j)
{
// make just one copy of the section vertex:
Vector2 sectionVertex = section.vertices[j];
// calculate normal using section vertex, curve normal and binormal:
normal.x = (sectionVertex.x * curve.Data[i].normal.x + sectionVertex.y * curve.Data[i].binormal.x) * sectionThickness;
normal.y = (sectionVertex.x * curve.Data[i].normal.y + sectionVertex.y * curve.Data[i].binormal.y) * sectionThickness;
normal.z = (sectionVertex.x * curve.Data[i].normal.z + sectionVertex.y * curve.Data[i].binormal.z) * sectionThickness;
// offset curve position by normal:
vertex.x = curve.Data[i].position.x + normal.x;
vertex.y = curve.Data[i].position.y + normal.y;
vertex.z = curve.Data[i].position.z + normal.z;
// cross(normal, curve tangent)
texTangent.x = normal.y * curve.Data[i].tangent.z - normal.z * curve.Data[i].tangent.y;
texTangent.y = normal.z * curve.Data[i].tangent.x - normal.x * curve.Data[i].tangent.z;
texTangent.z = normal.x * curve.Data[i].tangent.y - normal.y * curve.Data[i].tangent.x;
texTangent.w = -1;
uv.x = (j / (float)sectionSegments) * uvScale.x;
uv.y = vCoord;
vertices.Add(vertex);
normals.Add(normal);
tangents.Add(texTangent);
vertColors.Add(curve.Data[i].color);
uvs.Add(uv);
if (j < sectionSegments && i < curve.Count - 1)
{
tris.Add(sectionIndex * verticesPerSection + j);
tris.Add(nextSectionIndex * verticesPerSection + j);
tris.Add(sectionIndex * verticesPerSection + (j + 1));
tris.Add(sectionIndex * verticesPerSection + (j + 1));
tris.Add(nextSectionIndex * verticesPerSection + j);
tris.Add(nextSectionIndex * verticesPerSection + (j + 1));
}
}
sectionIndex++;
}
}
CommitMeshData();
}
}
public void UpdateRenderer(ObiActor actor)
{
using (m_UpdateMeshRopeRendererChunksPerfMarker.Auto())
{
if (mesh == null)
{
return;
}
if (smoother.smoothChunks.Count == 0)
{
return;
}
ObiList <ObiPathFrame> curve = smoother.smoothChunks[0];
if (curve.Count < 2)
{
return;
}
var rope = actor as ObiRopeBase;
float actualToRestLengthRatio = stretchWithRope ? smoother.SmoothLength / rope.restLength : 1;
// squashing factor, makes mesh thinner when stretched and thicker when compresssed.
float squashing = Mathf.Clamp(1 + volumeScaling * (1 / Mathf.Max(actualToRestLengthRatio, 0.01f) - 1), 0.01f, 2);
// Calculate scale along swept axis so that the mesh spans the entire lenght of the rope if required.
Vector3 actualScale = scale;
if (spanEntireLength)
{
actualScale[(int)axis] = rope.restLength / meshSizeAlongAxis;
}
float previousVertexValue = 0;
float meshLength = 0;
int index = 0;
int nextIndex = 1;
int prevIndex = 0;
float sectionMagnitude = Vector3.Distance(curve[index].position, curve[nextIndex].position);
// basis matrix for deforming the mesh:
Matrix4x4 basis = curve[0].ToMatrix(axis);
for (int i = 0; i < orderedVertices.Length; ++i)
{
int vIndex = orderedVertices[i];
float vertexValue = inputVertices[vIndex][(int)axis] * actualScale[(int)axis] + offset;
// Calculate how much we've advanced in the sort axis since the last vertex:
meshLength += (vertexValue - previousVertexValue) * actualToRestLengthRatio;
previousVertexValue = vertexValue;
// If we have advanced to the next section of the curve:
while (meshLength > sectionMagnitude && sectionMagnitude > Mathf.Epsilon)
{
meshLength -= sectionMagnitude;
index = Mathf.Min(index + 1, curve.Count - 1);
// Calculate previous and next curve indices:
nextIndex = Mathf.Min(index + 1, curve.Count - 1);
prevIndex = Mathf.Max(index - 1, 0);
// Calculate current tangent as the vector between previous and next curve points:
sectionMagnitude = Vector3.Distance(curve[index].position, curve[nextIndex].position);
// Update basis matrix:
basis = curve[index].ToMatrix(axis);
}
float sectionThickness = curve[index].thickness;
// calculate deformed vertex position:
Vector3 offsetFromCurve = Vector3.Scale(inputVertices[vIndex], actualScale * sectionThickness * squashing);
offsetFromCurve[(int)axis] = meshLength;
vertices[vIndex] = curve[index].position + basis.MultiplyVector(offsetFromCurve);
normals[vIndex] = basis.MultiplyVector(inputNormals[vIndex]);
tangents[vIndex] = basis * inputTangents[vIndex]; // avoids expensive implicit conversion from Vector4 to Vector3.
tangents[vIndex].w = inputTangents[vIndex].w;
}
CommitMeshData();
}
}
public override void UpdateRenderer(object sender, EventArgs e)
{
if (section == null || extrudedMesh == null)
{
return;
}
rope.SmoothCurvesFromParticles();
CreateMeshIfNeeded();
ClearMeshData();
float actualToRestLengthRatio = rope.SmoothLength / rope.RestLength;
int sectionSegments = section.Segments;
int verticesPerSection = sectionSegments + 1; // the last vertex in each section must be duplicated, due to uv wraparound.
float vCoord = -uvScale.y * rope.RestLength * uvAnchor; // v texture coordinate.
int sectionIndex = 0;
int tearCount = 0;
// we will define and transport a reference frame along the curve using parallel transport method:
if (frame == null)
{
frame = new ObiRope.CurveFrame();
}
frame.Reset();
frame.SetTwist(-sectionTwist * rope.SmoothSections * uvAnchor);
// for closed curves, last frame of the last curve must be equal to first frame of first curve.
Vector3 firstTangent = Vector3.forward;
Vector4 texTangent = Vector4.zero;
Vector2 uv = Vector2.zero;
for (int c = 0; c < rope.curves.Count; ++c)
{
ObiList <ObiRope.CurveSection> curve = rope.curves[c];
// Reinitialize frame for each curve.
frame.Reset();
for (int i = 0; i < curve.Count; ++i)
{
// Calculate previous and next curve indices:
//int nextIndex = Mathf.Min(i+1,curve.Count-1);
int prevIndex = Mathf.Max(i - 1, 0);
// Calculate current tangent as the vector between previous and next curve points:
//Vector3 nextV;
// The next tangent of the last segment of the last curve in a closed rope, is the first tangent again:
/*if (rope.Closed && c == rope.curves.Count-1 && i == curve.Count-1 )
* nextV = firstTangent;
* else
* nextV = curve[nextIndex].positionAndRadius - curve[i].positionAndRadius;*/
//Vector3 prevV = curve[i].positionAndRadius - curve[prevIndex].positionAndRadius;
//Vector3 tangent = nextV + prevV;
// update frame:
rope.TransportFrame(frame, curve[i], sectionTwist); //curve[i].positionAndRadius,tangent,rope.sectionTwist);
// update tear prefabs (first segment of not first curve, last segment of not last curve)
if (c > 0 && i == 0)
{
rope.UpdateTearPrefab(frame, ref tearCount, false);
}
if (c < rope.curves.Count - 1 && i == curve.Count - 1)
{
rope.UpdateTearPrefab(frame, ref tearCount, true);
}
// update start/end prefabs:
if (c == 0 && i == 0)
{
// store first tangent of the first curve (for closed ropes):
firstTangent = frame.tangent;
if (rope.startPrefabInstance != null && !rope.Closed)
{
rope.PlaceObjectAtCurveFrame(frame, rope.startPrefabInstance, Space.Self, false);
}
}
else if (c == rope.curves.Count - 1 && i == curve.Count - 1 && rope.endPrefabInstance != null && !rope.Closed)
{
rope.PlaceObjectAtCurveFrame(frame, rope.endPrefabInstance, Space.Self, true);
}
// advance v texcoord:
vCoord += uvScale.y * (Vector3.Distance(curve[i].positionAndRadius, curve[prevIndex].positionAndRadius) /
(normalizeV ? rope.SmoothLength : actualToRestLengthRatio));
// calculate section thickness (either constant, or particle radius based):
float sectionThickness = (rope.thicknessFromParticles ? curve[i].positionAndRadius.w : rope.thickness) * sectionThicknessScale;
// Loop around each segment:
for (int j = 0; j <= sectionSegments; ++j)
{
vertices.Add(frame.position + (section.vertices[j].x * frame.normal + section.vertices[j].y * frame.binormal) * sectionThickness);
normals.Add(vertices[vertices.Count - 1] - frame.position);
texTangent = -Vector3.Cross(normals[normals.Count - 1], frame.tangent);
texTangent.w = 1;
tangents.Add(texTangent);
vertColors.Add(curve[i].color);
uv.Set((j / (float)sectionSegments) * uvScale.x, vCoord);
uvs.Add(uv);
if (j < sectionSegments && i < curve.Count - 1)
{
tris.Add(sectionIndex * verticesPerSection + j);
tris.Add(sectionIndex * verticesPerSection + (j + 1));
tris.Add((sectionIndex + 1) * verticesPerSection + j);
tris.Add(sectionIndex * verticesPerSection + (j + 1));
tris.Add((sectionIndex + 1) * verticesPerSection + (j + 1));
tris.Add((sectionIndex + 1) * verticesPerSection + j);
}
}
sectionIndex++;
}
}
CommitMeshData();
}
public void UpdateRenderer(Camera camera)
{
if (camera == null || !rope.gameObject.activeInHierarchy)
{
return;
}
rope.SmoothCurvesFromParticles();
CreateMeshIfNeeded();
ClearMeshData();
float actualToRestLengthRatio = rope.SmoothLength / rope.RestLength;
float vCoord = -uvScale.y * rope.RestLength * uvAnchor; // v texture coordinate.
int sectionIndex = 0;
int tearCount = 0;
Vector3 localSpaceCamera = rope.transform.InverseTransformPoint(camera.transform.position);
// we will define and transport a reference frame along the curve using parallel transport method:
if (frame == null)
{
frame = new ObiRope.CurveFrame();
}
frame.Reset();
// for closed curves, last frame of the last curve must be equal to first frame of first curve.
Vector3 firstTangent = Vector3.forward;
Vector4 texTangent = Vector4.zero;
Vector2 uv = Vector2.zero;
for (int c = 0; c < rope.curves.Count; ++c)
{
ObiList <ObiRope.CurveSection> curve = rope.curves[c];
// Reinitialize frame for each curve.
frame.Reset();
for (int i = 0; i < curve.Count; ++i)
{
// Calculate previous and next curve indices:
//int nextIndex = Mathf.Min(i+1,curve.Count-1);
int prevIndex = Mathf.Max(i - 1, 0);
// Calculate current tangent as the vector between previous and next curve points:
/*Vector3 nextV;
*
* // The next tangent of the last segment of the last curve in a closed rope, is the first tangent again:
* if (rope.Closed && c == rope.curves.Count-1 && i == curve.Count-1 )
* nextV = firstTangent;
* else
* nextV = curve[nextIndex].positionAndRadius - curve[i].positionAndRadius;
*
* Vector3 prevV = curve[i].positionAndRadius - curve[prevIndex].positionAndRadius;
* Vector3 tangent = nextV + prevV;*/
// update frame:
frame.Transport(curve[i], 0);
// update tear prefabs:
if (c > 0 && i == 0)
{
rope.UpdateTearPrefab(frame, ref tearCount, false);
}
if (c < rope.curves.Count - 1 && i == curve.Count - 1)
{
rope.UpdateTearPrefab(frame, ref tearCount, true);
}
// update start/end prefabs:
if (c == 0 && i == 0)
{
// store first tangent of the first curve (for closed ropes):
firstTangent = frame.tangent;
if (rope.startPrefabInstance != null && !rope.Closed)
{
rope.PlaceObjectAtCurveFrame(frame, rope.startPrefabInstance, Space.Self, false);
}
}
else if (c == rope.curves.Count - 1 && i == curve.Count - 1 && rope.endPrefabInstance != null && !rope.Closed)
{
rope.PlaceObjectAtCurveFrame(frame, rope.endPrefabInstance, Space.Self, true);
}
// advance v texcoord:
vCoord += uvScale.y * (Vector3.Distance(curve[i].positionAndRadius, curve[prevIndex].positionAndRadius) /
(normalizeV?rope.SmoothLength:actualToRestLengthRatio));
// calculate section thickness (either constant, or particle radius based):
float sectionThickness = (rope.thicknessFromParticles ? curve[i].positionAndRadius.w : rope.thickness) * sectionThicknessScale;
Vector3 normal = frame.position - localSpaceCamera;
normal.Normalize();
Vector3 bitangent = Vector3.Cross(frame.tangent, normal);
bitangent.Normalize();
vertices.Add(frame.position + bitangent * sectionThickness);
vertices.Add(frame.position - bitangent * sectionThickness);
normals.Add(-normal);
normals.Add(-normal);
texTangent = -bitangent;
texTangent.w = 1;
tangents.Add(texTangent);
tangents.Add(texTangent);
vertColors.Add(curve[i].color);
vertColors.Add(curve[i].color);
uv.Set(0, vCoord);
uvs.Add(uv);
uv.Set(1, vCoord);
uvs.Add(uv);
if (i < curve.Count - 1)
{
tris.Add(sectionIndex * 2);
tris.Add(sectionIndex * 2 + 1);
tris.Add((sectionIndex + 1) * 2);
tris.Add(sectionIndex * 2 + 1);
tris.Add((sectionIndex + 1) * 2 + 1);
tris.Add((sectionIndex + 1) * 2);
}
sectionIndex++;
}
}
CommitMeshData();
}
public void UpdateRenderer(Camera camera)
{
using (m_UpdateLineRopeRendererChunksPerfMarker.Auto())
{
if (camera == null || !rope.gameObject.activeInHierarchy)
{
return;
}
CreateMeshIfNeeded();
ClearMeshData();
float actualToRestLengthRatio = smoother.SmoothLength / rope.restLength;
float vCoord = -uvScale.y * rope.restLength * uvAnchor; // v texture coordinate.
int sectionIndex = 0;
Vector3 localSpaceCamera = rope.transform.InverseTransformPoint(camera.transform.position);
Vector3 vertex = Vector3.zero, normal = Vector3.zero;
Vector4 bitangent = Vector4.zero;
Vector2 uv = Vector2.zero;
for (int c = 0; c < smoother.smoothChunks.Count; ++c)
{
ObiList <ObiPathFrame> curve = smoother.smoothChunks[c];
for (int i = 0; i < curve.Count; ++i)
{
// Calculate previous and next curve indices:
int prevIndex = Mathf.Max(i - 1, 0);
// advance v texcoord:
vCoord += uvScale.y * (Vector3.Distance(curve.Data[i].position, curve.Data[prevIndex].position) /
(normalizeV ? smoother.SmoothLength : actualToRestLengthRatio));
// calculate section thickness (either constant, or particle radius based):
float sectionThickness = curve.Data[i].thickness * thicknessScale;
normal.x = curve.Data[i].position.x - localSpaceCamera.x;
normal.y = curve.Data[i].position.y - localSpaceCamera.y;
normal.z = curve.Data[i].position.z - localSpaceCamera.z;
normal.Normalize();
bitangent.x = -(normal.y * curve.Data[i].tangent.z - normal.z * curve.Data[i].tangent.y);
bitangent.y = -(normal.z * curve.Data[i].tangent.x - normal.x * curve.Data[i].tangent.z);
bitangent.z = -(normal.x * curve.Data[i].tangent.y - normal.y * curve.Data[i].tangent.x);
bitangent.w = 0;
bitangent.Normalize();
vertex.x = curve.Data[i].position.x - bitangent.x * sectionThickness;
vertex.y = curve.Data[i].position.y - bitangent.y * sectionThickness;
vertex.z = curve.Data[i].position.z - bitangent.z * sectionThickness;
vertices.Add(vertex);
vertex.x = curve.Data[i].position.x + bitangent.x * sectionThickness;
vertex.y = curve.Data[i].position.y + bitangent.y * sectionThickness;
vertex.z = curve.Data[i].position.z + bitangent.z * sectionThickness;
vertices.Add(vertex);
normals.Add(-normal);
normals.Add(-normal);
bitangent.w = 1;
tangents.Add(bitangent);
tangents.Add(bitangent);
vertColors.Add(curve.Data[i].color);
vertColors.Add(curve.Data[i].color);
uv.x = 0; uv.y = vCoord;
uvs.Add(uv);
uv.x = 1;
uvs.Add(uv);
if (i < curve.Count - 1)
{
tris.Add(sectionIndex * 2);
tris.Add((sectionIndex + 1) * 2);
tris.Add(sectionIndex * 2 + 1);
tris.Add(sectionIndex * 2 + 1);
tris.Add((sectionIndex + 1) * 2);
tris.Add((sectionIndex + 1) * 2 + 1);
}
sectionIndex++;
}
}
CommitMeshData();
}
}
public override void Update(Camera camera)
{
if (mesh == null || rope.ropeMesh == null)
{
return;
}
rope.SmoothCurvesFromParticles();
if (rope.curves.Count == 0)
{
return;
}
ObiList <ObiRope.CurveSection> curve = rope.curves[0];
if (curve.Count < 2)
{
return;
}
float actualToRestLengthRatio = stretchWithRope ? rope.SmoothLength / rope.RestLength : 1;
// Calculate scale along swept axis so that the mesh spans the entire lenght of the rope if required.
Vector3 actualScale = scale;
if (spanEntireLength)
{
actualScale[(int)axis] = rope.RestLength / meshSizeAlongAxis;
}
float previousVertexValue = 0;
float meshLength = 0;
int index = 0;
int nextIndex = 1;
int prevIndex = 0;
Vector3 nextV = curve[nextIndex].positionAndRadius - curve[index].positionAndRadius;
Vector3 prevV = curve[index].positionAndRadius - curve[prevIndex].positionAndRadius;
Vector3 tangent = (nextV + prevV).normalized;
float sectionMagnitude = nextV.magnitude;
// we will define and transport a reference frame along the curve using parallel transport method:
if (frame == null)
{
frame = new ObiRope.CurveFrame();
}
frame.Reset();
frame.SetTwistAndTangent(-rope.sectionTwist * rope.SmoothSections * rope.uvAnchor, tangent);
// set frame's initial position:
frame.position = curve[index].positionAndRadius;
// basis matrix for deforming the mesh, also calculate column offsets based on swept axis:
Matrix4x4 basis = new Matrix4x4();
int xo = ((int)axis) % 3 * 4;
int yo = ((int)axis + 1) % 3 * 4;
int zo = ((int)axis + 2) % 3 * 4;
basis[xo] = frame.tangent[0];
basis[xo + 1] = frame.tangent[1];
basis[xo + 2] = frame.tangent[2];
basis[yo] = frame.normal[0];
basis[yo + 1] = frame.normal[1];
basis[yo + 2] = frame.normal[2];
basis[zo] = frame.binormal[0];
basis[zo + 1] = frame.binormal[1];
basis[zo + 2] = frame.binormal[2];
for (int i = 0; i < orderedVertices.Length; ++i)
{
int vIndex = orderedVertices[i];
float vertexValue = inputVertices[vIndex][(int)axis] * actualScale[(int)axis] + offset;
// Calculate how much we've advanced in the sort axis since the last vertex:
meshLength += (vertexValue - previousVertexValue) * actualToRestLengthRatio;
previousVertexValue = vertexValue;
// If we have advanced to the next section of the curve:
while (meshLength > sectionMagnitude && sectionMagnitude > Mathf.Epsilon)
{
meshLength -= sectionMagnitude;
index = Mathf.Min(index + 1, curve.Count - 1);
// Calculate previous and next curve indices:
nextIndex = Mathf.Min(index + 1, curve.Count - 1);
prevIndex = Mathf.Max(index - 1, 0);
// Calculate current tangent as the vector between previous and next curve points:
nextV = curve[nextIndex].positionAndRadius - curve[index].positionAndRadius;
prevV = curve[index].positionAndRadius - curve[prevIndex].positionAndRadius;
tangent = (nextV + prevV).normalized;
sectionMagnitude = nextV.magnitude;
// Transport frame:
frame.Transport(curve[index].positionAndRadius, tangent, rope.sectionTwist);
// Update basis matrix:
basis[xo] = frame.tangent[0];
basis[xo + 1] = frame.tangent[1];
basis[xo + 2] = frame.tangent[2];
basis[yo] = frame.normal[0];
basis[yo + 1] = frame.normal[1];
basis[yo + 2] = frame.normal[2];
basis[zo] = frame.binormal[0];
basis[zo + 1] = frame.binormal[1];
basis[zo + 2] = frame.binormal[2];
}
// calculate deformed vertex position:
Vector3 offsetFromCurve = Vector3.Scale(inputVertices[vIndex], actualScale);
offsetFromCurve[(int)axis] = meshLength;
vertices[vIndex] = frame.position + basis.MultiplyVector(offsetFromCurve);
normals[vIndex] = basis.MultiplyVector(inputNormals[vIndex]);
tangents[vIndex] = basis * inputTangents[vIndex]; // avoids expensive implicit conversion from Vector4 to Vector3.
tangents[vIndex].w = inputTangents[vIndex].w;
}
CommitMeshData();
}
public void UpdateRenderer(Camera camera)
{
using (m_UpdateLineRopeRendererChunksPerfMarker.Auto())
{
if (camera == null || !rope.gameObject.activeInHierarchy)
{
return;
}
CreateMeshIfNeeded();
ClearMeshData();
float actualToRestLengthRatio = smoother.SmoothLength / rope.restLength;
float vCoord = -uvScale.y * rope.restLength * uvAnchor; // v texture coordinate.
int sectionIndex = 0;
Vector3 localSpaceCamera = rope.transform.InverseTransformPoint(camera.transform.position);
// for closed curves, last frame of the last curve must be equal to first frame of first curve.
Vector3 firstTangent = Vector3.forward;
Vector4 texTangent = Vector4.zero;
Vector2 uv = Vector2.zero;
for (int c = 0; c < smoother.smoothChunks.Count; ++c)
{
ObiList <ObiPathFrame> curve = smoother.smoothChunks[c];
for (int i = 0; i < curve.Count; ++i)
{
// Calculate previous and next curve indices:
int prevIndex = Mathf.Max(i - 1, 0);
// update start/end prefabs:
if (c == 0 && i == 0)
{
// store first tangent of the first curve (for closed ropes):
firstTangent = curve[i].tangent;
}
// advance v texcoord:
vCoord += uvScale.y * (Vector3.Distance(curve[i].position, curve[prevIndex].position) /
(normalizeV ? smoother.SmoothLength : actualToRestLengthRatio));
// calculate section thickness (either constant, or particle radius based):
float sectionThickness = curve[i].thickness * thicknessScale;
Vector3 normal = curve[i].position - localSpaceCamera;
normal.Normalize();
Vector3 bitangent = Vector3.Cross(normal, curve[i].tangent);
bitangent.Normalize();
vertices.Add(curve[i].position + bitangent * sectionThickness);
vertices.Add(curve[i].position - bitangent * sectionThickness);
normals.Add(-normal);
normals.Add(-normal);
texTangent = -bitangent;
texTangent.w = 1;
tangents.Add(texTangent);
tangents.Add(texTangent);
vertColors.Add(curve[i].color);
vertColors.Add(curve[i].color);
uv.Set(0, vCoord);
uvs.Add(uv);
uv.Set(1, vCoord);
uvs.Add(uv);
if (i < curve.Count - 1)
{
tris.Add(sectionIndex * 2);
tris.Add((sectionIndex + 1) * 2);
tris.Add(sectionIndex * 2 + 1);
tris.Add(sectionIndex * 2 + 1);
tris.Add((sectionIndex + 1) * 2);
tris.Add((sectionIndex + 1) * 2 + 1);
}
sectionIndex++;
}
}
CommitMeshData();
}
}
public void UpdateRenderer(ObiActor actor)
{
using (m_UpdateExtrudedRopeRendererChunksPerfMarker.Auto())
{
if (section == null)
{
return;
}
var rope = actor as ObiRopeBase;
CreateMeshIfNeeded();
ClearMeshData();
float actualToRestLengthRatio = smoother.SmoothLength / rope.restLength;
int sectionSegments = section.Segments;
int verticesPerSection = sectionSegments + 1; // the last vertex in each section must be duplicated, due to uv wraparound.
float vCoord = -uvScale.y * rope.restLength * uvAnchor; // v texture coordinate.
int sectionIndex = 0;
// for closed curves, last frame of the last curve must be equal to first frame of first curve.
Vector3 vertex, normal, scaledNormal, scaledBinormal;
Vector4 texTangent = Vector4.zero;
Vector2 uv = Vector2.zero;
for (int c = 0; c < smoother.smoothChunks.Count; ++c)
{
ObiList <ObiPathFrame> curve = smoother.smoothChunks[c];
for (int i = 0; i < curve.Count; ++i)
{
// Calculate previous and next curve indices:
int prevIndex = Mathf.Max(i - 1, 0);
// advance v texcoord:
vCoord += uvScale.y * (Vector3.Distance(curve[i].position, curve[prevIndex].position) /
(normalizeV ? smoother.SmoothLength : actualToRestLengthRatio));
// calculate section thickness and scale the basis vectors by it:
float sectionThickness = curve[i].thickness * thicknessScale;
scaledNormal = curve[i].normal * sectionThickness;
scaledBinormal = curve[i].binormal * sectionThickness;
// Loop around each segment:
int nextSectionIndex = sectionIndex + 1;
for (int j = 0; j <= sectionSegments; ++j)
{
normal = section.vertices[j].x * scaledNormal + section.vertices[j].y * scaledBinormal;
vertex = curve[i].position + normal;
texTangent = Vector3.Cross(normal, curve[i].tangent);
texTangent.w = -1;
uv.Set((j / (float)sectionSegments) * uvScale.x, vCoord);
vertices.Add(vertex);
normals.Add(normal);
tangents.Add(texTangent);
vertColors.Add(curve[i].color);
uvs.Add(uv);
if (j < sectionSegments && i < curve.Count - 1)
{
tris.Add(sectionIndex * verticesPerSection + j);
tris.Add(nextSectionIndex * verticesPerSection + j);
tris.Add(sectionIndex * verticesPerSection + (j + 1));
tris.Add(sectionIndex * verticesPerSection + (j + 1));
tris.Add(nextSectionIndex * verticesPerSection + j);
tris.Add(nextSectionIndex * verticesPerSection + (j + 1));
}
}
sectionIndex++;
}
}
CommitMeshData();
}
}
