void AddSolidLaneLine(
NativeArray <RigidTransform> samples,
float xOffset,
RoadMarking marking,
DynamicBuffer <CombinedVertex> vertexBuffer,
DynamicBuffer <Triangle> triangleBuffer,
DynamicBuffer <SubMesh> subMeshBuffer)
{
var newSubMesh = new SubMesh();
var markingWidth = marking.Width / 2;
var leftOffsetSpline = SplineUtility.OffsetSpline(samples, new float3(-markingWidth + xOffset, 0f, 0f), Allocator.Temp);
var rightOffsetSpline = SplineUtility.OffsetSpline(samples, new float3(markingWidth + xOffset, 0f, 0f), Allocator.Temp);
newSubMesh.VertexStartIndex = vertexBuffer.Length;
newSubMesh.VertexCount = samples.Length * 2;
vertexBuffer.ResizeUninitialized(vertexBuffer.Length + samples.Length * 2);
var upVector = new float3(0f, 1f, 0f);
for (int i = 0, j = newSubMesh.VertexStartIndex; i < samples.Length; i++)
{
var leftPoint = leftOffsetSpline[i];
vertexBuffer[j++] = new CombinedVertex
{
Vertex = leftPoint.pos,
Normal = math.mul(leftPoint.rot, upVector),
Uv = leftPoint.pos.xz
};
var rightPoint = rightOffsetSpline[i];
vertexBuffer[j++] = new CombinedVertex
{
Vertex = rightPoint.pos,
Normal = math.mul(rightPoint.rot, upVector),
Uv = rightPoint.pos.xz
};
}
leftOffsetSpline.Dispose();
rightOffsetSpline.Dispose();
newSubMesh.TriangleStartIndex = triangleBuffer.Length;
newSubMesh.TriangleCount = (samples.Length - 1) * 6;
triangleBuffer.ResizeUninitialized(triangleBuffer.Length + newSubMesh.TriangleCount);
for (int i = 0, j = newSubMesh.TriangleStartIndex; i < newSubMesh.VertexCount - 2; i += 2)
{
triangleBuffer[j++] = i;
triangleBuffer[j++] = i + 3;
triangleBuffer[j++] = i + 1;
triangleBuffer[j++] = i;
triangleBuffer[j++] = i + 2;
triangleBuffer[j++] = i + 3;
}
newSubMesh.Material = marking.Material;
subMeshBuffer.Add(newSubMesh);
}
/// <summary>
/// Generates a simplified triangulation for road surfaces that do not have dashed road markings
/// </summary>
/// <param name="index"></param>
void SimpleLoft(int index)
{
var surfaceEntity = SurfaceEntities[index];
var surface = Surfaces[surfaceEntity];
var profile = Profiles[surface.Profile];
var loftPath = LoftPathBuffers[profile.Road].Reinterpret <RigidTransform>();
var lateralProfileBuffer = ProfileSampleBuffers[surface.Profile]
.Reinterpret <float2>().AsNativeArray()
.GetSubArray(surface.StartIndex, surface.SampleCount);
var lateralProfile = new NativeArray <float2>(lateralProfileBuffer.Length, Allocator.Temp);
lateralProfile.CopyFrom(lateralProfileBuffer);
if (surface.LeftLaneMarking != Entity.Null)
{
var markingWidth = RoadMarkings[surface.LeftLaneMarking].Width / 2f;
lateralProfile[0] += new float2(markingWidth, 0f);
}
if (surface.RightLaneMarking != Entity.Null)
{
var markingWidth = RoadMarkings[surface.RightLaneMarking].Width / 2f;
lateralProfile[lateralProfile.Length - 1] -= new float2(markingWidth, 0f);
}
var numVertices = loftPath.Length * lateralProfile.Length;
var vertices = new NativeArray <float3>(numVertices, Allocator.Temp, NativeArrayOptions.UninitializedMemory);
for (var i = 0; i < loftPath.Length; i++)
{
for (var j = 0; j < lateralProfile.Length; j++)
{
vertices[i * lateralProfile.Length + j] = math.transform(
loftPath[i],
Utilities.GeometryUtility.SwizzleXY0(lateralProfile[j]));
}
}
// Create normals for lateral profile
var lateralProfileNormals = new NativeArray <float3>(lateralProfile.Length, Allocator.Temp, NativeArrayOptions.UninitializedMemory);
{
var v1 = Utilities.GeometryUtility.SwizzleXY0(math.normalize(lateralProfile[1] - lateralProfile[0]));
v1 = new float3(-v1.y, v1.x, 0f);
lateralProfileNormals[0] = v1;
var v2 = v1;
for (var j = 1; j < lateralProfile.Length - 1; j++)
{
v2 = Utilities.GeometryUtility.SwizzleXY0(math.normalize(lateralProfile[j + 1] - lateralProfile[j]));
v2 = new float3(-v2.y, v2.x, 0f);
lateralProfileNormals[j] = math.normalize(v1 + v2);
v1 = v2;
}
lateralProfileNormals[lateralProfile.Length - 1] = v2;
}
var normals = new NativeArray <float3>(numVertices, Allocator.Temp, NativeArrayOptions.UninitializedMemory);
for (var i = 0; i < loftPath.Length; i++)
{
for (var j = 0; j < lateralProfile.Length; j++)
{
normals[i * lateralProfile.Length + j] = math.rotate(loftPath[i], lateralProfileNormals[j]);
}
}
var uvs = new NativeArray <float2>(numVertices, Allocator.Temp, NativeArrayOptions.UninitializedMemory);
if (surface.TexStrategy == TextureCoordinateStrategy.WorldSpace)
{
for (var i = 0; i < uvs.Length; i++)
{
uvs[i] = vertices[i].xz;
}
}
else
{
var us = new NativeArray <float>(lateralProfile.Length, Allocator.Temp)
{
[0] = 0f
};
for (var i = 1; i < us.Length; i++)
{
us[i] = math.distance(lateralProfile[i], lateralProfile[i - 1]) + us[i - 1];
}
var vs = new NativeArray <float>(loftPath.Length, Allocator.Temp)
{
[0] = 0f
};
for (var i = 1; i < vs.Length; i++)
{
vs[i] = math.distance(loftPath[i].pos, loftPath[i - 1].pos) + vs[i - 1];
}
for (var i = 0; i < loftPath.Length; i++)
{
for (var j = 0; j < lateralProfile.Length; j++)
{
uvs[i * lateralProfile.Length + j] = new float2(us[j], vs[i]);
}
}
}
var newSubMesh = new SubMesh {
Material = surface.Material
};
var combinedVertexBuffer = CombinedVertexBuffers[surfaceEntity];
newSubMesh.VertexStartIndex = combinedVertexBuffer.Length;
newSubMesh.VertexCount = vertices.Length;
combinedVertexBuffer.ResizeUninitialized(newSubMesh.VertexStartIndex + newSubMesh.VertexCount);
for (int i = 0, j = newSubMesh.VertexStartIndex; i < vertices.Length; i++, j++)
{
combinedVertexBuffer[j] = new CombinedVertex
{
Vertex = vertices[i],
Normal = normals[i],
Uv = uvs[i]
};
}
vertices.Dispose();
normals.Dispose();
uvs.Dispose();
var triangleBuffer = TriangleBuffers[surfaceEntity].Reinterpret <int>();
newSubMesh.TriangleStartIndex = triangleBuffer.Length;
var numTriangles = (loftPath.Length - 1) * (lateralProfile.Length - 1) * 6;
newSubMesh.TriangleCount = numTriangles;
triangleBuffer.ResizeUninitialized(newSubMesh.TriangleStartIndex + newSubMesh.TriangleCount);
for (int i = 1, j = newSubMesh.TriangleStartIndex; i < loftPath.Length; i++)
{
var prevOffset = (i - 1) * lateralProfile.Length;
var nextOffset = i * lateralProfile.Length;
for (var k = 1; k < lateralProfile.Length; k++)
{
triangleBuffer[j++] = prevOffset + k;
triangleBuffer[j++] = prevOffset + k - 1;
triangleBuffer[j++] = nextOffset + k - 1;
triangleBuffer[j++] = nextOffset + k - 1;
triangleBuffer[j++] = nextOffset + k;
triangleBuffer[j++] = prevOffset + k;
}
}
lateralProfile.Dispose();
SubMeshBuffers[surfaceEntity].Add(newSubMesh);
}
/// <summary>
/// Triangulates a road surface bordered on at least one side by dashed road markings
/// </summary>
/// <param name="index"></param>
void LoftWithDashedRoadMarking(int index)
{
var surfaceEntity = SurfaceEntities[index];
var surface = Surfaces[surfaceEntity];
var profile = Profiles[surface.Profile];
var lateralProfileBuffer = ProfileSampleBuffers[surface.Profile]
.Reinterpret <float2>().AsNativeArray()
.GetSubArray(surface.StartIndex, surface.SampleCount);
var leftLateralPoint = new float3(lateralProfileBuffer[0].x, 0f, 0f);
var rightLateralPoint = new float3(lateralProfileBuffer[lateralProfileBuffer.Length - 1].x, 0f, 0f);
var loftPath = LoftPathBuffers[profile.Road].Reinterpret <RigidTransform>().AsNativeArray();
NativeArray <RigidTransform> leftSamples, rightSamples;
NativeArray <DashPoint> leftDashPoints, rightDashPoints;
if (surface.LeftLaneMarking != Entity.Null &&
!Utilities.GeometryUtility.ApproximatelyEqual(RoadMarkings[surface.LeftLaneMarking].SeparationDistance, 0f))
{
var leftMarkingWidth = RoadMarkings[surface.LeftLaneMarking].Width;
leftLateralPoint.x += leftMarkingWidth / 2f;
var roadMarkingSamples = RoadMarkingSampleBuffers[surface.LeftLaneMarking]
.Reinterpret <RigidTransform>().AsNativeArray();
leftSamples = Utilities.SplineUtility.OffsetSpline(roadMarkingSamples, leftLateralPoint, Allocator.Temp);
leftDashPoints = new NativeArray <DashPoint>(DashPointBuffers[surface.LeftLaneMarking].AsNativeArray(), Allocator.Temp);
}
else
{
if (surface.LeftLaneMarking != Entity.Null)
{
leftLateralPoint.x += RoadMarkings[surface.LeftLaneMarking].Width / 2f;
}
leftSamples = Utilities.SplineUtility.OffsetSpline(loftPath, leftLateralPoint, Allocator.Temp);
leftDashPoints = new NativeArray <DashPoint>(leftSamples.Length, Allocator.Temp, NativeArrayOptions.UninitializedMemory);
for (var i = 0; i < leftDashPoints.Length; i++)
{
leftDashPoints[i] = new DashPoint {
Distance = i
};
}
}
if (surface.RightLaneMarking != Entity.Null &&
!Utilities.GeometryUtility.ApproximatelyEqual(RoadMarkings[surface.RightLaneMarking].SeparationDistance, 0f))
{
var rightMarkingWidth = RoadMarkings[surface.RightLaneMarking].Width;
rightLateralPoint.x -= rightMarkingWidth / 2f;
var roadMarkingSamples = RoadMarkingSampleBuffers[surface.RightLaneMarking]
.Reinterpret <RigidTransform>().AsNativeArray();
rightSamples = Utilities.SplineUtility.OffsetSpline(roadMarkingSamples, rightLateralPoint, Allocator.Temp);
rightDashPoints = new NativeArray <DashPoint>(DashPointBuffers[surface.RightLaneMarking].AsNativeArray(), Allocator.Temp);
}
else
{
if (surface.RightLaneMarking != Entity.Null)
{
rightLateralPoint.x -= RoadMarkings[surface.RightLaneMarking].Width / 2f;
}
rightSamples = Utilities.SplineUtility.OffsetSpline(loftPath, rightLateralPoint, Allocator.Temp);
rightDashPoints = new NativeArray <DashPoint>(rightSamples.Length, Allocator.Temp, NativeArrayOptions.UninitializedMemory);
for (var i = 0; i < rightDashPoints.Length; i++)
{
rightDashPoints[i] = new DashPoint {
Distance = i
};
}
}
var vertexBuffer = CombinedVertexBuffers[surfaceEntity];
var numVertices = leftSamples.Length + rightSamples.Length;
vertexBuffer.ResizeUninitialized(numVertices);
var vertexArray = vertexBuffer.AsNativeArray();
for (var i = 0; i < leftSamples.Length; i++)
{
vertexArray[i] = new CombinedVertex
{
Vertex = leftSamples[i].pos,
Normal = math.mul(leftSamples[i].rot, new float3(0f, 1f, 0f)),
Uv = leftSamples[i].pos.xz
};
}
for (int i = 0, j = leftSamples.Length; i < rightSamples.Length; i++, j++)
{
vertexArray[j] = new CombinedVertex
{
Vertex = rightSamples[i].pos,
Normal = math.mul(rightSamples[i].rot, new float3(0f, 1f, 0f)),
Uv = rightSamples[i].pos.xz
};
}
var triangleBuffer = TriangleBuffers[surfaceEntity].Reinterpret <int>();
triangleBuffer.ResizeUninitialized(3 * (numVertices - 2));
var triangleArray = triangleBuffer.AsNativeArray();
var numLeftSamples = leftSamples.Length;
for (int i = 1, leftStartIdx = 0, rightStartIdx = 0, triangleIdx = 0; i < loftPath.Length; i++)
{
var nextLeftIdx = leftStartIdx + 1;
var nextRightIdx = rightStartIdx + 1;
while (!Utilities.GeometryUtility.ApproximatelyEqual(leftDashPoints[nextLeftIdx].Distance, i))
{
nextLeftIdx++;
}
while (!Utilities.GeometryUtility.ApproximatelyEqual(rightDashPoints[nextRightIdx].Distance, i))
{
nextRightIdx++;
}
for (var j = leftStartIdx; j < nextLeftIdx; j++)
{
triangleArray[triangleIdx++] = rightStartIdx + numLeftSamples;
triangleArray[triangleIdx++] = j;
triangleArray[triangleIdx++] = j + 1;
}
for (var j = rightStartIdx; j < nextRightIdx; j++)
{
triangleArray[triangleIdx++] = nextLeftIdx;
triangleArray[triangleIdx++] = numLeftSamples + j + 1;
triangleArray[triangleIdx++] = numLeftSamples + j;
}
leftStartIdx = nextLeftIdx;
rightStartIdx = nextRightIdx;
}
var subMeshBuffer = SubMeshBuffers[surfaceEntity];
subMeshBuffer.Add(new SubMesh
{
Material = RoadMaterial.RoadSurface,
VertexStartIndex = 0,
VertexCount = vertexArray.Length,
TriangleStartIndex = 0,
TriangleCount = triangleArray.Length
});
leftSamples.Dispose();
leftDashPoints.Dispose();
rightSamples.Dispose();
rightDashPoints.Dispose();
}