public override MeshGenerator Generate()
{
int N = EdgeVertices; int Nm2 = N - 2;
int NT = N - 1;
int N2 = N * N;
vertices = new VectorArray3d((NoSharedVertices) ? (N2 * 6) : (8 + Nm2 * 12 + Nm2 * Nm2 * 6));
uv = new VectorArray2f(vertices.Count);
normals = new VectorArray3f(vertices.Count);
triangles = new IndexArray3i(2 * NT * NT * 6);
groups = new int[triangles.Count];
Vector3d[] boxvertices = Box.ComputeVertices();
int vi = 0;
int ti = 0;
if (NoSharedVertices)
{
for (int fi = 0; fi < 6; ++fi)
{
// get corner vertices
Vector3d v00 = boxvertices[gIndices.BoxFaces[fi, 0]];
Vector3d v01 = boxvertices[gIndices.BoxFaces[fi, 1]];
Vector3d v11 = boxvertices[gIndices.BoxFaces[fi, 2]];
Vector3d v10 = boxvertices[gIndices.BoxFaces[fi, 3]];
Vector3f faceN = Math.Sign(gIndices.BoxFaceNormals[fi]) * (Vector3f)Box.Axis(Math.Abs(gIndices.BoxFaceNormals[fi]) - 1);
// add vertex rows
int start_vi = vi;
for (int yi = 0; yi < N; ++yi)
{
double ty = (double)yi / (double)(N - 1);
for (int xi = 0; xi < N; ++xi)
{
double tx = (double)xi / (double)(N - 1);
normals[vi] = faceN;
uv[vi] = new Vector2f(tx, ty);
vertices[vi++] = bilerp(ref v00, ref v01, ref v11, ref v10, tx, ty);
}
}
// add faces
for (int y0 = 0; y0 < NT; ++y0)
{
for (int x0 = 0; x0 < NT; ++x0)
{
int i00 = start_vi + y0 * N + x0;
int i10 = start_vi + (y0 + 1) * N + x0;
int i01 = i00 + 1, i11 = i10 + 1;
groups[ti] = fi;
triangles.Set(ti++, i00, i01, i11, Clockwise);
groups[ti] = fi;
triangles.Set(ti++, i00, i11, i10, Clockwise);
}
}
}
}
else
{
// construct integer coordinates
Vector3i[] intvertices = new Vector3i[boxvertices.Length];
for (int k = 0; k < boxvertices.Length; ++k)
{
Vector3d v = boxvertices[k] - Box.Center;
intvertices[k] = new Vector3i(
v.x < 0 ? 0 : N - 1,
v.y < 0 ? 0 : N - 1,
v.z < 0 ? 0 : N - 1);
}
int[] faceIndicesV = new int[N2];
// add edge vertices and store in this map
// todo: don't use a map (?) how do we do that, though...
// - each index is in range [0,N). If we have (i,j,k), then for a given
// i, we have a finite number of j and k (< 2N?).
// make N array of 2N length, key on i, linear search for matching j/k?
Dictionary <Vector3i, int> edgeVerts = new Dictionary <Vector3i, int>();
for (int fi = 0; fi < 6; ++fi)
{
// get corner vertices
int c00 = gIndices.BoxFaces[fi, 0], c01 = gIndices.BoxFaces[fi, 1],
c11 = gIndices.BoxFaces[fi, 2], c10 = gIndices.BoxFaces[fi, 3];
Vector3d v00 = boxvertices[c00]; Vector3i vi00 = intvertices[c00];
Vector3d v01 = boxvertices[c01]; Vector3i vi01 = intvertices[c01];
Vector3d v11 = boxvertices[c11]; Vector3i vi11 = intvertices[c11];
Vector3d v10 = boxvertices[c10]; Vector3i vi10 = intvertices[c10];
Action <Vector3d, Vector3d, Vector3i, Vector3i> do_edge = (a, b, ai, bi) => {
for (int i = 0; i < N; ++i)
{
double t = (double)i / (double)(N - 1);
Vector3i vidx = lerp(ref ai, ref bi, t);
if (edgeVerts.ContainsKey(vidx) == false)
{
Vector3d v = Vector3d.Lerp(ref a, ref b, t);
normals[vi] = (Vector3f)v.Normalized;
uv[vi] = Vector2f.Zero;
edgeVerts[vidx] = vi;
vertices[vi++] = v;
}
}
};
do_edge(v00, v01, vi00, vi01);
do_edge(v01, v11, vi01, vi11);
do_edge(v11, v10, vi11, vi10);
do_edge(v10, v00, vi10, vi00);
}
// now generate faces
for (int fi = 0; fi < 6; ++fi)
{
// get corner vertices
int c00 = gIndices.BoxFaces[fi, 0], c01 = gIndices.BoxFaces[fi, 1],
c11 = gIndices.BoxFaces[fi, 2], c10 = gIndices.BoxFaces[fi, 3];
Vector3d v00 = boxvertices[c00]; Vector3i vi00 = intvertices[c00];
Vector3d v01 = boxvertices[c01]; Vector3i vi01 = intvertices[c01];
Vector3d v11 = boxvertices[c11]; Vector3i vi11 = intvertices[c11];
Vector3d v10 = boxvertices[c10]; Vector3i vi10 = intvertices[c10];
Vector3f faceN = Math.Sign(gIndices.BoxFaceNormals[fi]) * (Vector3f)Box.Axis(Math.Abs(gIndices.BoxFaceNormals[fi]) - 1);
// add vertex rows, using existing vertices if we have them in map
for (int yi = 0; yi < N; ++yi)
{
double ty = (double)yi / (double)(N - 1);
for (int xi = 0; xi < N; ++xi)
{
double tx = (double)xi / (double)(N - 1);
Vector3i vidx = bilerp(ref vi00, ref vi01, ref vi11, ref vi10, tx, ty);
int use_vi;
if (edgeVerts.TryGetValue(vidx, out use_vi) == false)
{
Vector3d v = bilerp(ref v00, ref v01, ref v11, ref v10, tx, ty);
use_vi = vi++;
normals[use_vi] = faceN;
uv[use_vi] = new Vector2f(tx, ty);
vertices[use_vi] = v;
}
faceIndicesV[yi * N + xi] = use_vi;
}
}
// add faces
for (int y0 = 0; y0 < NT; ++y0)
{
int y1 = y0 + 1;
for (int x0 = 0; x0 < NT; ++x0)
{
int x1 = x0 + 1;
int i00 = faceIndicesV[y0 * N + x0];
int i01 = faceIndicesV[y0 * N + x1];
int i11 = faceIndicesV[y1 * N + x1];
int i10 = faceIndicesV[y1 * N + x0];
groups[ti] = fi;
triangles.Set(ti++, i00, i01, i11, Clockwise);
groups[ti] = fi;
triangles.Set(ti++, i00, i11, i10, Clockwise);
}
}
}
}
return(this);
}
override public void Generate()
{
if (Polygon == null)
{
Polygon = Polygon2d.MakeCircle(1.0f, 8);
}
int Slices = Polygon.VertexCount;
int nRings = Vertices.Count;
int nRingSize = (NoSharedVertices) ? Slices + 1 : Slices;
int nCapVertices = (NoSharedVertices) ? Slices + 1 : 1;
if (Capped == false)
{
nCapVertices = 0;
}
vertices = new VectorArray3d(nRings * nRingSize + 2 * nCapVertices);
uv = new VectorArray2f(vertices.Count);
normals = new VectorArray3f(vertices.Count);
int nSpanTris = (Vertices.Count - 1) * (2 * Slices);
int nCapTris = (Capped) ? 2 * Slices : 0;
triangles = new IndexArray3i(nSpanTris + nCapTris);
Frame3f fCur = new Frame3f(Frame);
Vector3d dv = CurveUtils.GetTangent(Vertices, 0);;
fCur.Origin = (Vector3f)Vertices[0];
fCur.AlignAxis(2, (Vector3f)dv);
Frame3f fStart = new Frame3f(fCur);
// generate tube
for (int ri = 0; ri < nRings; ++ri)
{
// propagate frame
if (ri != 0)
{
Vector3d tan = CurveUtils.GetTangent(Vertices, ri);
fCur.Origin = (Vector3f)Vertices[ri];
if (ri == 11)
{
dv = tan;
}
fCur.AlignAxis(2, (Vector3f)tan);
}
float uv_along = (float)ri / (float)(nRings - 1);
// generate vertices
int nStartR = ri * nRingSize;
for (int j = 0; j < nRingSize; ++j)
{
float uv_around = (float)j / (float)(nRings);
int k = nStartR + j;
Vector2d pv = Polygon.Vertices[j % Slices];
Vector3d v = fCur.FromFrameP((Vector2f)pv, 2);
vertices[k] = v;
uv[k] = new Vector2f(uv_along, uv_around);
Vector3f n = (Vector3f)(v - fCur.Origin).Normalized;
normals[k] = n;
}
}
// generate triangles
int ti = 0;
for (int ri = 0; ri < nRings - 1; ++ri)
{
int r0 = ri * nRingSize;
int r1 = r0 + nRingSize;
for (int k = 0; k < nRingSize - 1; ++k)
{
triangles.Set(ti++, r0 + k, r0 + k + 1, r1 + k + 1, Clockwise);
triangles.Set(ti++, r0 + k, r1 + k + 1, r1 + k, Clockwise);
}
if (NoSharedVertices == false) // close disc if we went all the way
{
triangles.Set(ti++, r1 - 1, r0, r1, Clockwise);
triangles.Set(ti++, r1 - 1, r1, r1 + nRingSize - 1, Clockwise);
}
}
if (Capped)
{
// add endcap verts
int nBottomC = nRings * nRingSize;
vertices[nBottomC] = fStart.Origin;
uv[nBottomC] = new Vector2f(0.5f, 0.5f);
normals[nBottomC] = -fStart.Z;
startCapCenterIndex = nBottomC;
int nTopC = nBottomC + 1;
vertices[nTopC] = fCur.Origin;
uv[nTopC] = new Vector2f(0.5f, 0.5f);
normals[nTopC] = fCur.Z;
endCapCenterIndex = nTopC;
if (NoSharedVertices)
{
// duplicate first loop and make a fan w/ bottom-center
int nExistingB = 0;
int nStartB = nTopC + 1;
for (int k = 0; k < Slices; ++k)
{
vertices[nStartB + k] = vertices[nExistingB + k];
uv[nStartB + k] = (Vector2f)Polygon.Vertices[k].Normalized;
normals[nStartB + k] = normals[nBottomC];
}
append_disc(Slices, nBottomC, nStartB, true, Clockwise, ref ti);
// duplicate second loop and make fan
int nExistingT = nRingSize * (nRings - 1);
int nStartT = nStartB + Slices;
for (int k = 0; k < Slices; ++k)
{
vertices[nStartT + k] = vertices[nExistingT + k];
uv[nStartT + k] = (Vector2f)Polygon.Vertices[k].Normalized;
normals[nStartT + k] = normals[nTopC];
}
append_disc(Slices, nTopC, nStartT, true, !Clockwise, ref ti);
}
else
{
append_disc(Slices, nBottomC, 0, true, Clockwise, ref ti);
append_disc(Slices, nTopC, nRingSize * (nRings - 1), true, !Clockwise, ref ti);
}
}
}
override public void Generate()
{
vertices = new VectorArray3d(4);
uv = new VectorArray2f(4);
normals = new VectorArray3f(4);
triangles = new IndexArray3i(2);
vertices[0] = new Vector3d(-Width / 2.0f, 0, -Height / 2.0f);
vertices[1] = new Vector3d(Width / 2.0f, 0, -Height / 2.0f);
vertices[2] = new Vector3d(Width / 2.0f, 0, Height / 2.0f);
vertices[3] = new Vector3d(-Width / 2.0f, 0, Height / 2.0f);
normals[0] = normals[1] = normals[2] = normals[3] = Vector3f.AxisY;
float uvleft = 0.0f, uvright = 1.0f, uvbottom = 0.0f, uvtop = 1.0f;
// if we want the UV subregion, we assume it is
if (UVMode != UVModes.FullUVSquare)
{
if (Width > Height)
{
float a = Height / Width;
if (UVMode == UVModes.CenteredUVRectangle)
{
uvbottom = 0.5f - a / 2.0f; uvtop = 0.5f + a / 2.0f;
}
else
{
uvtop = a;
}
}
else if (Height > Width)
{
float a = Width / Height;
if (UVMode == UVModes.CenteredUVRectangle)
{
uvleft = 0.5f - a / 2.0f; uvright = 0.5f + a / 2.0f;
}
else
{
uvright = a;
}
}
}
uv[0] = new Vector2f(uvleft, uvbottom);
uv[1] = new Vector2f(uvright, uvbottom);
uv[2] = new Vector2f(uvright, uvtop);
uv[3] = new Vector2f(uvleft, uvtop);
if (Clockwise == true)
{
triangles.Set(0, 0, 1, 2);
triangles.Set(1, 0, 2, 3);
}
else
{
triangles.Set(0, 0, 2, 1);
triangles.Set(1, 0, 3, 2);
}
}
override public MeshGenerator Generate()
{
if (Polygon == null)
{
Polygon = Polygon2d.MakeCircle(1.0f, 8);
}
int NV = Vertices.Count;
int Slices = Polygon.VertexCount;
int nRings = (ClosedLoop && NoSharedVertices) ? NV + 1 : NV;
int nRingSize = (NoSharedVertices) ? Slices + 1 : Slices;
int nCapVertices = (NoSharedVertices) ? Slices + 1 : 1;
if (Capped == false || ClosedLoop == true)
{
nCapVertices = 0;
}
vertices = new VectorArray3d(nRings * nRingSize + 2 * nCapVertices);
uv = new VectorArray2f(vertices.Count);
normals = new VectorArray3f(vertices.Count);
int quad_strips = (ClosedLoop) ? NV : NV - 1;
int nSpanTris = quad_strips * (2 * Slices);
int nCapTris = (Capped && ClosedLoop == false) ? 2 * Slices : 0;
triangles = new IndexArray3i(nSpanTris + nCapTris);
Frame3f fCur = new Frame3f(Frame);
Vector3d dv = CurveUtils.GetTangent(Vertices, 0, ClosedLoop);
fCur.Origin = (Vector3f)Vertices[0];
fCur.AlignAxis(2, (Vector3f)dv);
Frame3f fStart = new Frame3f(fCur);
double circumference = Polygon.ArcLength;
double pathLength = CurveUtils.ArcLength(Vertices, ClosedLoop);
double accum_path_u = 0;
// generate tube
for (int ri = 0; ri < nRings; ++ri)
{
int vi = ri % NV;
// propagate frame
Vector3d tangent = CurveUtils.GetTangent(Vertices, vi, ClosedLoop);
fCur.Origin = (Vector3f)Vertices[vi];
fCur.AlignAxis(2, (Vector3f)tangent);
// generate vertices
int nStartR = ri * nRingSize;
double accum_ring_v = 0;
for (int j = 0; j < nRingSize; ++j)
{
int k = nStartR + j;
Vector2d pv = Polygon.Vertices[j % Slices];
Vector2d pvNext = Polygon.Vertices[(j + 1) % Slices];
Vector3d v = fCur.FromPlaneUV((Vector2f)pv, 2);
vertices[k] = v;
uv[k] = new Vector2f(accum_path_u, accum_ring_v);
accum_ring_v += (pv.Distance(pvNext) / circumference);
Vector3f n = (Vector3f)(v - fCur.Origin).Normalized;
normals[k] = n;
}
int viNext = (ri + 1) % NV;
double d = Vertices[vi].Distance(Vertices[viNext]);
accum_path_u += d / pathLength;
}
// generate triangles
int ti = 0;
int nStop = (ClosedLoop && NoSharedVertices == false) ? nRings : (nRings - 1);
for (int ri = 0; ri < nStop; ++ri)
{
int r0 = ri * nRingSize;
int r1 = r0 + nRingSize;
if (ClosedLoop && ri == nStop - 1 && NoSharedVertices == false)
{
r1 = 0;
}
for (int k = 0; k < nRingSize - 1; ++k)
{
triangles.Set(ti++, r0 + k, r0 + k + 1, r1 + k + 1, Clockwise);
triangles.Set(ti++, r0 + k, r1 + k + 1, r1 + k, Clockwise);
}
if (NoSharedVertices == false) // last quad if we aren't sharing vertices
{
int M = nRingSize - 1;
triangles.Set(ti++, r0 + M, r0, r1, Clockwise);
triangles.Set(ti++, r0 + M, r1, r1 + M, Clockwise);
}
}
if (Capped && ClosedLoop == false)
{
Vector2d c = (OverrideCapCenter) ? CapCenter : Polygon.Bounds.Center;
// add endcap verts
int nBottomC = nRings * nRingSize;
vertices[nBottomC] = fStart.FromPlaneUV((Vector2f)c, 2);
uv[nBottomC] = new Vector2f(0.5f, 0.5f);
normals[nBottomC] = -fStart.Z;
startCapCenterIndex = nBottomC;
int nTopC = nBottomC + 1;
vertices[nTopC] = fCur.FromPlaneUV((Vector2f)c, 2);
uv[nTopC] = new Vector2f(0.5f, 0.5f);
normals[nTopC] = fCur.Z;
endCapCenterIndex = nTopC;
if (NoSharedVertices)
{
// duplicate first loop and make a fan w/ bottom-center
int nExistingB = 0;
int nStartB = nTopC + 1;
for (int k = 0; k < Slices; ++k)
{
vertices[nStartB + k] = vertices[nExistingB + k];
Vector2d vuv = ((Polygon[k] - c).Normalized + Vector2d.One) * 0.5;
uv[nStartB + k] = (Vector2f)vuv;
normals[nStartB + k] = normals[nBottomC];
}
append_disc(Slices, nBottomC, nStartB, true, Clockwise, ref ti);
// duplicate second loop and make fan
int nExistingT = nRingSize * (nRings - 1);
int nStartT = nStartB + Slices;
for (int k = 0; k < Slices; ++k)
{
vertices[nStartT + k] = vertices[nExistingT + k];
uv[nStartT + k] = uv[nStartB + k];
normals[nStartT + k] = normals[nTopC];
}
append_disc(Slices, nTopC, nStartT, true, !Clockwise, ref ti);
}
else
{
append_disc(Slices, nBottomC, 0, true, Clockwise, ref ti);
append_disc(Slices, nTopC, nRingSize * (nRings - 1), true, !Clockwise, ref ti);
}
}
return(this);
}
override public void Generate()
{
int nRings = (NoSharedVertices) ? 2 * (Sections.Length - 1) : Sections.Length;
int nRingSize = (NoSharedVertices) ? Slices + 1 : Slices;
int nCapVertices = (NoSharedVertices) ? Slices + 1 : 1;
if (Capped == false)
{
nCapVertices = 0;
}
vertices = new VectorArray3d(nRings * nRingSize + 2 * nCapVertices);
uv = new VectorArray2f(vertices.Count);
normals = new VectorArray3f(vertices.Count);
int nSpanTris = (Sections.Length - 1) * (2 * Slices);
int nCapTris = (Capped) ? 2 * Slices : 0;
triangles = new IndexArray3i(nSpanTris + nCapTris);
float fDelta = (float)((Math.PI * 2.0) / Slices);
float fYSpan = Sections.Last().SectionY - Sections[0].SectionY;
if (fYSpan == 0)
{
fYSpan = 1.0f;
}
// generate top and bottom rings for cylinder
int ri = 0;
for (int si = 0; si < Sections.Length; ++si)
{
int nStartR = ri * nRingSize;
float y = Sections[si].SectionY;
float yt = (y - Sections[0].SectionY) / fYSpan;
for (int j = 0; j < nRingSize; ++j)
{
int k = nStartR + j;
float angle = (float)j * fDelta;
double cosa = Math.Cos(angle), sina = Math.Sin(angle);
vertices[k] = new Vector3d(Sections[si].Radius * cosa, y, Sections[si].Radius * sina);
float t = (float)j / (float)(Slices - 1);
uv[k] = new Vector2f(t, yt);
Vector3f n = new Vector3f((float)cosa, 0, (float)sina);
n.Normalize();
normals[k] = n;
}
ri++;
if (NoSharedVertices && si != 0 && si != Sections.Length - 1)
{
duplicate_vertex_span(nStartR, nRingSize);
ri++;
}
}
// generate triangles
int ti = 0;
ri = 0;
for (int si = 0; si < Sections.Length - 1; ++si)
{
int r0 = ri * nRingSize;
int r1 = r0 + nRingSize;
ri += (NoSharedVertices) ? 2 : 1;
for (int k = 0; k < nRingSize - 1; ++k)
{
triangles.Set(ti++, r0 + k, r0 + k + 1, r1 + k + 1, Clockwise);
triangles.Set(ti++, r0 + k, r1 + k + 1, r1 + k, Clockwise);
}
if (NoSharedVertices == false) // close disc if we went all the way
{
triangles.Set(ti++, r1 - 1, r0, r1, Clockwise);
triangles.Set(ti++, r1 - 1, r1, r1 + nRingSize - 1, Clockwise);
}
}
if (Capped)
{
// add endcap verts
var s0 = Sections[0];
var sN = Sections.Last();
int nBottomC = nRings * nRingSize;
vertices[nBottomC] = new Vector3d(0, s0.SectionY, 0);
uv[nBottomC] = new Vector2f(0.5f, 0.5f);
normals[nBottomC] = new Vector3f(0, -1, 0);
startCapCenterIndex = nBottomC;
int nTopC = nBottomC + 1;
vertices[nTopC] = new Vector3d(0, sN.SectionY, 0);
uv[nTopC] = new Vector2f(0.5f, 0.5f);
normals[nTopC] = new Vector3f(0, 1, 0);
endCapCenterIndex = nTopC;
if (NoSharedVertices)
{
int nStartB = nTopC + 1;
for (int k = 0; k < Slices; ++k)
{
float a = (float)k * fDelta;
double cosa = Math.Cos(a), sina = Math.Sin(a);
vertices[nStartB + k] = new Vector3d(s0.Radius * cosa, s0.SectionY, s0.Radius * sina);
uv[nStartB + k] = new Vector2f(0.5f * (1.0f + cosa), 0.5f * (1 + sina));
normals[nStartB + k] = -Vector3f.AxisY;
}
append_disc(Slices, nBottomC, nStartB, true, Clockwise, ref ti);
int nStartT = nStartB + Slices;
for (int k = 0; k < Slices; ++k)
{
float a = (float)k * fDelta;
double cosa = Math.Cos(a), sina = Math.Sin(a);
vertices[nStartT + k] = new Vector3d(sN.Radius * cosa, sN.SectionY, sN.Radius * sina);
uv[nStartT + k] = new Vector2f(0.5f * (1.0f + cosa), 0.5f * (1 + sina));
normals[nStartT + k] = Vector3f.AxisY;
}
append_disc(Slices, nTopC, nStartT, true, !Clockwise, ref ti);
}
else
{
append_disc(Slices, nBottomC, 0, true, Clockwise, ref ti);
append_disc(Slices, nTopC, nRingSize * (Sections.Length - 1), true, !Clockwise, ref ti);
}
}
}
override public void Generate()
{
bool bClosed = ((EndAngleDeg - StartAngleDeg) > 359.99f);
int nRingSize = (NoSharedVertices && bClosed) ? Slices + 1 : Slices;
int nCapVertices = (NoSharedVertices) ? Slices + 1 : 1;
int nFaceVertices = (NoSharedVertices && bClosed == false) ? 8 : 0;
vertices = new VectorArray3d(2 * nRingSize + 2 * nCapVertices + nFaceVertices);
uv = new VectorArray2f(vertices.Count);
normals = new VectorArray3f(vertices.Count);
int nCylTris = 2 * Slices;
int nCapTris = 2 * Slices;
int nFaceTris = (bClosed == false) ? 4 : 0;
triangles = new IndexArray3i(nCylTris + nCapTris + nFaceTris);
groups = new int[triangles.Count];
float fTotalRange = (EndAngleDeg - StartAngleDeg) * MathUtil.Deg2Radf;
float fStartRad = StartAngleDeg * MathUtil.Deg2Radf;
float fDelta = (bClosed) ? fTotalRange / Slices : fTotalRange / (Slices - 1);
// generate top and bottom rings for cylinder
for (int k = 0; k < nRingSize; ++k)
{
float angle = fStartRad + (float)k * fDelta;
double cosa = Math.Cos(angle), sina = Math.Sin(angle);
vertices[k] = new Vector3d(BaseRadius * cosa, 0, BaseRadius * sina);
vertices[nRingSize + k] = new Vector3d(TopRadius * cosa, Height, TopRadius * sina);
float t = (float)k / (float)Slices;
uv[k] = new Vector2f(t, 0.0f);
uv[nRingSize + k] = new Vector2f(t, 1.0f);
Vector3f n = new Vector3f((float)cosa, 0, (float)sina);
n.Normalize();
normals[k] = normals[nRingSize + k] = n;
}
// generate cylinder panels
int ti = 0;
for (int k = 0; k < nRingSize - 1; ++k)
{
groups[ti] = 1;
triangles.Set(ti++, k, k + 1, nRingSize + k + 1, Clockwise);
groups[ti] = 1;
triangles.Set(ti++, k, nRingSize + k + 1, nRingSize + k, Clockwise);
}
if (bClosed && NoSharedVertices == false) // close disc if we went all the way
{
groups[ti] = 1;
triangles.Set(ti++, nRingSize - 1, 0, nRingSize, Clockwise);
groups[ti] = 1;
triangles.Set(ti++, nRingSize - 1, nRingSize, 2 * nRingSize - 1, Clockwise);
}
int nBottomC = 2 * nRingSize;
vertices[nBottomC] = new Vector3d(0, 0, 0);
uv[nBottomC] = new Vector2f(0.5f, 0.5f);
normals[nBottomC] = new Vector3f(0, -1, 0);
int nTopC = 2 * nRingSize + 1;
vertices[nTopC] = new Vector3d(0, Height, 0);
uv[nTopC] = new Vector2f(0.5f, 0.5f);
normals[nTopC] = new Vector3f(0, 1, 0);
if (NoSharedVertices)
{
int nStartB = 2 * nRingSize + 2;
for (int k = 0; k < Slices; ++k)
{
float a = fStartRad + (float)k * fDelta;
double cosa = Math.Cos(a), sina = Math.Sin(a);
vertices[nStartB + k] = new Vector3d(BaseRadius * cosa, 0, BaseRadius * sina);
uv[nStartB + k] = new Vector2f(0.5f * (1.0f + cosa), 0.5f * (1 + sina));
normals[nStartB + k] = -Vector3f.AxisY;
}
append_disc(Slices, nBottomC, nStartB, bClosed, Clockwise, ref ti, 2);
int nStartT = 2 * nRingSize + 2 + Slices;
for (int k = 0; k < Slices; ++k)
{
float a = fStartRad + (float)k * fDelta;
double cosa = Math.Cos(a), sina = Math.Sin(a);
vertices[nStartT + k] = new Vector3d(TopRadius * cosa, Height, TopRadius * sina);
uv[nStartT + k] = new Vector2f(0.5f * (1.0f + cosa), 0.5f * (1 + sina));
normals[nStartT + k] = Vector3f.AxisY;
}
append_disc(Slices, nTopC, nStartT, bClosed, !Clockwise, ref ti, 3);
// ugh this is very ugly but hard to see the pattern...
if (bClosed == false)
{
int nStartF = 2 * nRingSize + 2 + 2 * Slices;
vertices[nStartF] = vertices[nStartF + 5] = vertices[nBottomC];
vertices[nStartF + 1] = vertices[nStartF + 4] = vertices[nTopC];
vertices[nStartF + 2] = vertices[nRingSize];
vertices[nStartF + 3] = vertices[0];
vertices[nStartF + 6] = vertices[nRingSize - 1];
vertices[nStartF + 7] = vertices[2 * nRingSize - 1];
normals[nStartF] = normals[nStartF + 1] = normals[nStartF + 2] = normals[nStartF + 3]
= estimate_normal(nStartF, nStartF + 1, nStartF + 2);
normals[nStartF + 4] = normals[nStartF + 5] = normals[nStartF + 6] = normals[nStartF + 7]
= estimate_normal(nStartF + 4, nStartF + 5, nStartF + 6);
uv[nStartF] = uv[nStartF + 5] = new Vector2f(0, 0);
uv[nStartF + 1] = uv[nStartF + 4] = new Vector2f(0, 1);
uv[nStartF + 2] = uv[nStartF + 7] = new Vector2f(1, 1);
uv[nStartF + 3] = uv[nStartF + 6] = new Vector2f(1, 0);
append_rectangle(nStartF + 0, nStartF + 1, nStartF + 2, nStartF + 3, !Clockwise, ref ti, 4);
append_rectangle(nStartF + 4, nStartF + 5, nStartF + 6, nStartF + 7, !Clockwise, ref ti, 5);
}
}
else
{
append_disc(Slices, nBottomC, 0, bClosed, Clockwise, ref ti, 2);
append_disc(Slices, nTopC, nRingSize, bClosed, !Clockwise, ref ti, 3);
if (bClosed == false)
{
append_rectangle(nBottomC, 0, nRingSize, nTopC, Clockwise, ref ti, 4);
append_rectangle(nRingSize - 1, nBottomC, nTopC, 2 * nRingSize - 1, Clockwise, ref ti, 5);
}
}
}
override public void Generate()
{
bool bClosed = ((EndAngleDeg - StartAngleDeg) > 359.99f);
int nRingSize = (NoSharedVertices && bClosed) ? Slices + 1 : Slices;
int nTipVertices = (NoSharedVertices) ? nRingSize : 1;
int nCapVertices = (NoSharedVertices) ? Slices + 1 : 1;
int nFaceVertices = (NoSharedVertices && bClosed == false) ? 6 : 0;
vertices = new VectorArray3d(nRingSize + nTipVertices + nCapVertices + nFaceVertices);
uv = new VectorArray2f(vertices.Count);
normals = new VectorArray3f(vertices.Count);
int nConeTris = (NoSharedVertices) ? 2 * Slices : Slices;
int nCapTris = Slices;
int nFaceTris = (bClosed == false) ? 2 : 0;
triangles = new IndexArray3i(nConeTris + nCapTris + nFaceTris);
float fTotalRange = (EndAngleDeg - StartAngleDeg) * MathUtil.Deg2Radf;
float fStartRad = StartAngleDeg * MathUtil.Deg2Radf;
float fDelta = (bClosed) ? fTotalRange / Slices : fTotalRange / (Slices - 1);
// generate rings
for (int k = 0; k < nRingSize; ++k)
{
float angle = fStartRad + (float)k * fDelta;
double cosa = Math.Cos(angle), sina = Math.Sin(angle);
vertices[k] = new Vector3d(BaseRadius * cosa, 0, BaseRadius * sina);
uv[k] = new Vector2f(0.5f * (1.0f + cosa), 0.5f * (1 + sina));
Vector3f n = new Vector3f(cosa * Height, BaseRadius / Height, sina * Height);
n.Normalize();
normals[k] = n;
if (NoSharedVertices)
{
vertices[nRingSize + k] = new Vector3d(0, Height, 0);
uv[nRingSize + k] = new Vector2f(0.5f, 0.5f);
normals[nRingSize + k] = n;
}
}
if (NoSharedVertices == false)
{
vertices[nRingSize] = new Vector3d(0, Height, 0);
normals[nRingSize] = Vector3f.AxisY;
uv[nRingSize] = new Vector2f(0.5f, 0.5f);
}
// generate cylinder panels
int ti = 0;
if (NoSharedVertices)
{
for (int k = 0; k < nRingSize - 1; ++k)
{
triangles.Set(ti++, k, k + 1, nRingSize + k + 1, Clockwise);
triangles.Set(ti++, k, nRingSize + k + 1, nRingSize + k, Clockwise);
}
}
else
{
append_disc(Slices, nRingSize, 0, bClosed, !Clockwise, ref ti);
}
int nBottomC = nRingSize + nTipVertices;
vertices[nBottomC] = new Vector3d(0, 0, 0);
uv[nBottomC] = new Vector2f(0.5f, 0.5f);
normals[nBottomC] = new Vector3f(0, -1, 0);
if (NoSharedVertices)
{
int nStartB = nBottomC + 1;
for (int k = 0; k < Slices; ++k)
{
float a = fStartRad + (float)k * fDelta;
double cosa = Math.Cos(a), sina = Math.Sin(a);
vertices[nStartB + k] = new Vector3d(BaseRadius * cosa, 0, BaseRadius * sina);
uv[nStartB + k] = new Vector2f(0.5f * (1.0f + cosa), 0.5f * (1 + sina));
normals[nStartB + k] = -Vector3f.AxisY;
}
append_disc(Slices, nBottomC, nStartB, bClosed, Clockwise, ref ti);
// ugh this is very ugly but hard to see the pattern...
if (bClosed == false)
{
int nStartF = nStartB + Slices;
vertices[nStartF] = vertices[nStartF + 4] = vertices[nBottomC];
vertices[nStartF + 1] = vertices[nStartF + 3] = new Vector3d(0, Height, 0);;
vertices[nStartF + 2] = vertices[0];;
vertices[nStartF + 5] = vertices[nRingSize - 1];
normals[nStartF] = normals[nStartF + 1] = normals[nStartF + 2]
= estimate_normal(nStartF, nStartF + 1, nStartF + 2);
normals[nStartF + 3] = normals[nStartF + 4] = normals[nStartF + 5]
= estimate_normal(nStartF + 3, nStartF + 4, nStartF + 5);
uv[nStartF] = uv[nStartF + 4] = new Vector2f(0, 0);
uv[nStartF + 1] = uv[nStartF + 3] = new Vector2f(0, 1);
uv[nStartF + 2] = uv[nStartF + 5] = new Vector2f(1, 0);
triangles.Set(ti++, nStartF + 0, nStartF + 1, nStartF + 2, !Clockwise);
triangles.Set(ti++, nStartF + 3, nStartF + 4, nStartF + 5, !Clockwise);
}
}
else
{
append_disc(Slices, nBottomC, 0, bClosed, Clockwise, ref ti);
if (bClosed == false)
{
triangles.Set(ti++, nBottomC, nRingSize, 0, !Clockwise);
triangles.Set(ti++, nBottomC, nRingSize, nRingSize - 1, Clockwise);
}
}
}
override public MeshGenerator Generate()
{
if (MathUtil.InRange(IndicesMap.a, 1, 3) == false || MathUtil.InRange(IndicesMap.b, 1, 3) == false)
{
throw new Exception("TrivialRectGenerator: Invalid IndicesMap!");
}
vertices = new VectorArray3d(4);
uv = new VectorArray2f(4);
normals = new VectorArray3f(4);
triangles = new IndexArray3i(2);
vertices[0] = make_vertex(-Width / 2.0f, -Height / 2.0f);
vertices[1] = make_vertex(Width / 2.0f, -Height / 2.0f);
vertices[2] = make_vertex(Width / 2.0f, Height / 2.0f);
vertices[3] = make_vertex(-Width / 2.0f, Height / 2.0f);
normals[0] = normals[1] = normals[2] = normals[3] = Normal;
float uvleft = 0.0f, uvright = 1.0f, uvbottom = 0.0f, uvtop = 1.0f;
// if we want the UV subregion, we assume it is
if (UVMode != UVModes.FullUVSquare)
{
if (Width > Height)
{
float a = Height / Width;
if (UVMode == UVModes.CenteredUVRectangle)
{
uvbottom = 0.5f - a / 2.0f; uvtop = 0.5f + a / 2.0f;
}
else
{
uvtop = a;
}
}
else if (Height > Width)
{
float a = Width / Height;
if (UVMode == UVModes.CenteredUVRectangle)
{
uvleft = 0.5f - a / 2.0f; uvright = 0.5f + a / 2.0f;
}
else
{
uvright = a;
}
}
}
uv[0] = new Vector2f(uvleft, uvbottom);
uv[1] = new Vector2f(uvright, uvbottom);
uv[2] = new Vector2f(uvright, uvtop);
uv[3] = new Vector2f(uvleft, uvtop);
if (Clockwise == true)
{
triangles.Set(0, 0, 1, 2);
triangles.Set(1, 0, 2, 3);
}
else
{
triangles.Set(0, 0, 2, 1);
triangles.Set(1, 0, 3, 2);
}
return(this);
}
override public MeshGenerator Generate()
{
int corner_v = 0, corner_t = 0;
for (int k = 0; k < 4; ++k)
{
if (((int)SharpCorners & (1 << k)) != 0)
{
corner_v += 1;
corner_t += 2;
}
else
{
corner_v += CornerSteps;
corner_t += (CornerSteps + 1);
}
}
vertices = new VectorArray3d(12 + corner_v);
uv = new VectorArray2f(vertices.Count);
normals = new VectorArray3f(vertices.Count);
triangles = new IndexArray3i(10 + corner_t);
float innerW = Width - 2 * Radius;
float innerH = Height - 2 * Radius;
// make vertices for inner "cross" (ie 5 squares)
vertices[0] = new Vector3d(-innerW / 2.0f, 0, -innerH / 2.0f);
vertices[1] = new Vector3d(innerW / 2.0f, 0, -innerH / 2.0f);
vertices[2] = new Vector3d(innerW / 2.0f, 0, innerH / 2.0f);
vertices[3] = new Vector3d(-innerW / 2.0f, 0, innerH / 2.0f);
vertices[4] = new Vector3d(-innerW / 2, 0, -Height / 2);
vertices[5] = new Vector3d(innerW / 2, 0, -Height / 2);
vertices[6] = new Vector3d(Width / 2, 0, -innerH / 2);
vertices[7] = new Vector3d(Width / 2, 0, innerH / 2);
vertices[8] = new Vector3d(innerW / 2, 0, Height / 2);
vertices[9] = new Vector3d(-innerW / 2, 0, Height / 2);
vertices[10] = new Vector3d(-Width / 2, 0, innerH / 2);
vertices[11] = new Vector3d(-Width / 2, 0, -innerH / 2);
// make triangles for inner cross
bool cycle = (Clockwise == false);
int ti = 0;
append_rectangle(0, 1, 2, 3, cycle, ref ti);
append_rectangle(4, 5, 1, 0, cycle, ref ti);
append_rectangle(1, 6, 7, 2, cycle, ref ti);
append_rectangle(3, 2, 8, 9, cycle, ref ti);
append_rectangle(11, 0, 3, 10, cycle, ref ti);
int vi = 12;
for (int j = 0; j < 4; ++j)
{
bool sharp = ((int)SharpCorners & (1 << j)) > 0;
if (sharp)
{
append_2d_disc_segment(corner_spans[3 * j], corner_spans[3 * j + 1], corner_spans[3 * j + 2], 1,
cycle, ref vi, ref ti, -1, MathUtil.SqrtTwo * Radius);
}
else
{
append_2d_disc_segment(corner_spans[3 * j], corner_spans[3 * j + 1], corner_spans[3 * j + 2], CornerSteps,
cycle, ref vi, ref ti);
}
}
for (int k = 0; k < vertices.Count; ++k)
{
normals[k] = Vector3f.AxisY;
}
float uvleft = 0.0f, uvright = 1.0f, uvbottom = 0.0f, uvtop = 1.0f;
// if we want the UV subregion, we assume it is
if (UVMode != UVModes.FullUVSquare)
{
if (Width > Height)
{
float a = Height / Width;
if (UVMode == UVModes.CenteredUVRectangle)
{
uvbottom = 0.5f - a / 2.0f; uvtop = 0.5f + a / 2.0f;
}
else
{
uvtop = a;
}
}
else if (Height > Width)
{
float a = Width / Height;
if (UVMode == UVModes.CenteredUVRectangle)
{
uvleft = 0.5f - a / 2.0f; uvright = 0.5f + a / 2.0f;
}
else
{
uvright = a;
}
}
}
Vector3d c = new Vector3d(-Width / 2, 0, -Height / 2);
for (int k = 0; k < vertices.Count; ++k)
{
Vector3d v = vertices[k];
double tx = (v.x - c.x) / Width;
double ty = (v.y - c.y) / Height;
uv[k] = new Vector2f((1 - tx) * uvleft + (tx) * uvright,
(1 - ty) * uvbottom + (ty) * uvtop);
}
return(this);
}
override public MeshGenerator Generate()
{
if (MathUtil.InRange(IndicesMap.a, 1, 3) == false || MathUtil.InRange(IndicesMap.b, 1, 3) == false)
{
throw new Exception("GriddedRectGenerator: Invalid IndicesMap!");
}
int N = (EdgeVertices > 1) ? EdgeVertices : 2;
int NT = N - 1, N2 = N * N;
vertices = new VectorArray3d(N2);
uv = new VectorArray2f(vertices.Count);
normals = new VectorArray3f(vertices.Count);
triangles = new IndexArray3i(2 * NT * NT);
groups = new int[triangles.Count];
// corner vertices
Vector3d v00 = make_vertex(-Width / 2.0f, -Height / 2.0f);
Vector3d v01 = make_vertex(Width / 2.0f, -Height / 2.0f);
Vector3d v11 = make_vertex(Width / 2.0f, Height / 2.0f);
Vector3d v10 = make_vertex(-Width / 2.0f, Height / 2.0f);
// corner UVs
float uvleft = 0.0f, uvright = 1.0f, uvbottom = 0.0f, uvtop = 1.0f;
if (UVMode != UVModes.FullUVSquare)
{
if (Width > Height)
{
float a = Height / Width;
if (UVMode == UVModes.CenteredUVRectangle)
{
uvbottom = 0.5f - a / 2.0f; uvtop = 0.5f + a / 2.0f;
}
else
{
uvtop = a;
}
}
else if (Height > Width)
{
float a = Width / Height;
if (UVMode == UVModes.CenteredUVRectangle)
{
uvleft = 0.5f - a / 2.0f; uvright = 0.5f + a / 2.0f;
}
else
{
uvright = a;
}
}
}
Vector2f uv00 = new Vector2f(uvleft, uvbottom);
Vector2f uv01 = new Vector2f(uvright, uvbottom);
Vector2f uv11 = new Vector2f(uvright, uvtop);
Vector2f uv10 = new Vector2f(uvleft, uvtop);
int vi = 0;
int ti = 0;
// add vertex rows
int start_vi = vi;
for (int yi = 0; yi < N; ++yi)
{
double ty = (double)yi / (double)(N - 1);
for (int xi = 0; xi < N; ++xi)
{
double tx = (double)xi / (double)(N - 1);
normals[vi] = Normal;
uv[vi] = bilerp(ref uv00, ref uv01, ref uv11, ref uv10, (float)tx, (float)ty);
vertices[vi++] = bilerp(ref v00, ref v01, ref v11, ref v10, tx, ty);
}
}
// add faces
for (int y0 = 0; y0 < NT; ++y0)
{
for (int x0 = 0; x0 < NT; ++x0)
{
int i00 = start_vi + y0 * N + x0;
int i10 = start_vi + (y0 + 1) * N + x0;
int i01 = i00 + 1, i11 = i10 + 1;
groups[ti] = 0;
triangles.Set(ti++, i00, i11, i01, Clockwise);
groups[ti] = 0;
triangles.Set(ti++, i00, i10, i11, Clockwise);
}
}
return(this);
}
public override void Generate()
{
int nRings = Curve.Length;
int nRingSize = (NoSharedVertices) ? Slices + 1 : Slices;
int nCapVertices = (NoSharedVertices) ? Slices + 1 : 1;
if (Capped == false)
{
nCapVertices = 0;
}
vertices = new VectorArray3d(nRingSize * nRings + 2 * nCapVertices);
uv = new VectorArray2f(vertices.Count);
normals = new VectorArray3f(vertices.Count);
int nSpanTris = (nRings - 1) * (2 * Slices);
int nCapTris = (Capped) ? 2 * Slices : 0;
triangles = new IndexArray3i(nSpanTris + nCapTris);
float fDelta = (float)((Math.PI * 2.0) / Slices);
Frame3f f = Axis;
// generate tube
for (int ri = 0; ri < nRings; ++ri)
{
Vector3d v_along = Curve[ri];
Vector3f v_frame = f.ToFrameP((Vector3f)v_along);
float uv_along = (float)ri / (float)(nRings - 1);
// generate vertices
int nStartR = ri * nRingSize;
for (int j = 0; j < nRingSize; ++j)
{
float angle = (float)j * fDelta;
// [TODO] this is not efficient...use Matrix3f?
Vector3f v_rot = Quaternionf.AxisAngleR(Vector3f.AxisY, angle) * v_frame;
Vector3d v_new = f.FromFrameP(v_rot);
int k = nStartR + j;
vertices[k] = v_new;
float uv_around = (float)j / (float)(nRingSize);
uv[k] = new Vector2f(uv_along, uv_around);
// [TODO] proper normal
Vector3f n = (Vector3f)(v_new - f.Origin).Normalized;
normals[k] = n;
}
}
// generate triangles
int ti = 0;
for (int ri = 0; ri < nRings - 1; ++ri)
{
int r0 = ri * nRingSize;
int r1 = r0 + nRingSize;
for (int k = 0; k < nRingSize - 1; ++k)
{
triangles.Set(ti++, r0 + k, r0 + k + 1, r1 + k + 1, Clockwise);
triangles.Set(ti++, r0 + k, r1 + k + 1, r1 + k, Clockwise);
}
if (NoSharedVertices == false) // close disc if we went all the way
{
triangles.Set(ti++, r1 - 1, r0, r1, Clockwise);
triangles.Set(ti++, r1 - 1, r1, r1 + nRingSize - 1, Clockwise);
}
}
if (Capped)
{
// find avg start loop size
Vector3d vAvgStart = Vector3d.Zero, vAvgEnd = Vector3d.Zero;
for (int k = 0; k < Slices; ++k)
{
vAvgStart += vertices[k];
vAvgEnd += vertices[(nRings - 1) * nRingSize + k];
}
vAvgStart /= (double)Slices;
vAvgEnd /= (double)Slices;
Frame3f fStart = f;
fStart.Origin = (Vector3f)vAvgStart;
Frame3f fEnd = f;
fEnd.Origin = (Vector3f)vAvgEnd;
// add endcap verts
int nBottomC = nRings * nRingSize;
vertices[nBottomC] = fStart.Origin;
uv[nBottomC] = new Vector2f(0.5f, 0.5f);
normals[nBottomC] = -fStart.Z;
startCapCenterIndex = nBottomC;
int nTopC = nBottomC + 1;
vertices[nTopC] = fEnd.Origin;
uv[nTopC] = new Vector2f(0.5f, 0.5f);
normals[nTopC] = fEnd.Z;
endCapCenterIndex = nTopC;
if (NoSharedVertices)
{
// duplicate first loop and make a fan w/ bottom-center
int nExistingB = 0;
int nStartB = nTopC + 1;
for (int k = 0; k < Slices; ++k)
{
vertices[nStartB + k] = vertices[nExistingB + k];
//uv[nStartB + k] = (Vector2f)Polygon.Vertices[k].Normalized;
float angle = (float)k * fDelta;
double cosa = Math.Cos(angle), sina = Math.Sin(angle);
uv[nStartB + k] = new Vector2f(0.5f * (1.0f + cosa), 0.5f * (1 + sina));
normals[nStartB + k] = normals[nBottomC];
}
append_disc(Slices, nBottomC, nStartB, true, Clockwise, ref ti);
// duplicate second loop and make fan
int nExistingT = nRingSize * (nRings - 1);
int nStartT = nStartB + Slices;
for (int k = 0; k < Slices; ++k)
{
vertices[nStartT + k] = vertices[nExistingT + k];
//uv[nStartT + k] = (Vector2f)Polygon.Vertices[k].Normalized;
float angle = (float)k * fDelta;
double cosa = Math.Cos(angle), sina = Math.Sin(angle);
uv[nStartT + k] = new Vector2f(0.5f * (1.0f + cosa), 0.5f * (1 + sina));
normals[nStartT + k] = normals[nTopC];
}
append_disc(Slices, nTopC, nStartT, true, !Clockwise, ref ti);
}
else
{
append_disc(Slices, nBottomC, 0, true, Clockwise, ref ti);
append_disc(Slices, nTopC, nRingSize * (nRings - 1), true, !Clockwise, ref ti);
}
}
}