public float getFitScale(Vector2f reference)
{
Vector2f div = reference / size;
return(Mathf.Min(div.x, div.y));
}
public Vector3d(Vector2f copy, double _z)
{
x = copy.x; y = copy.y; z = _z;
}
public bool Contains(Vector2f v)
{
return(v.grThan(min) && v.lessThan(max));
}
void update_from_endpoints(Vector2f p0, Vector2f p1)
{
Center = 0.5f * (p0 + p1);
Direction = p1 - p0;
Extent = 0.5f * Direction.Normalize();
}
private bool is3ds; // usd to shwo that the 4D4D magic number has been found
public IOReadResult Read(BinaryReader reader, ReadOptions options, IMeshBuilder builder)
{
ushort ChunkID;
String ChnkID = "";
UInt32 Clength;
MeshName = "";
hasMesh = false;
is3ds = false;
// Process the file - fails very politely when there is no more data
while (true)
{
//Get the Id of the next Chunk
try {
ChunkID = reader.ReadUInt16();
} catch {
break;
}
ChnkID = ChunkID.ToString("X");
//Get the size of the next chunk in chars
Clength = reader.ReadUInt32();
//Process based on Chunk ID
switch (ChnkID)
{
case "4D4D":
//This is a new file header
is3ds = true;
reader.ReadChars(10);
break;
case "3D3D":
//This is a new Object Header
reader.ReadChars(10);
break;
case "4000":
//This is an object Block. Store the name temporarily in case it is a mesh
List <char> name = new List <char>();
while (true)
{
char next = reader.ReadChar();
if (next == 0)
{
break;
}
name.Add(next);
}
MeshName = new String(name.ToArray <char>());
break;
case "4100":
// This is a new Mesh. Retrieve the name and add if the builder supports Metadata
builder.AppendNewMesh(false, false, false, false);
if (builder.SupportsMetaData)
{
builder.AppendMetaData("name", MeshName);
}
break;
case "4110":
// List of Vertexes
ushort VertexCount = reader.ReadUInt16();
for (int x = 0; x < VertexCount; x++)
{
double X = reader.ReadSingle();
double Y = reader.ReadSingle();
double Z = reader.ReadSingle();
builder.AppendVertex(X, Y, Z);
}
break;
case "4120":
// List of Triangles
ushort PolygonCount = reader.ReadUInt16();
for (int j = 0; j < PolygonCount; j++)
{
int a = reader.ReadInt16();
int b = reader.ReadInt16();
int c = reader.ReadInt16();
int flags = reader.ReadUInt16();
builder.AppendTriangle(a, b, c);
}
break;
case "4130":
// Mapping from Vertex to Material - retrieved but not currently used
List <char> mname = new List <char>();
while (true)
{
char next = reader.ReadChar();
if (next == 0)
{
break;
}
mname.Add(next);
}
string MatName = new String(mname.ToArray <char>());
ushort entries = reader.ReadUInt16();
for (int i = 0; i < entries; i++)
{
ushort face = reader.ReadUInt16();
}
break;
case "4140":
// List of UVs per vertex
ushort uvCount = reader.ReadUInt16();
for (ushort y = 0; y < uvCount; y++)
{
Vector2f UV = new Vector2f(reader.ReadSingle(), reader.ReadSingle());
builder.SetVertexUV(y, UV);
}
break;
default:
// Any other chunk - retrieved and not used - held in dump temporarily for debug
char[] dump = reader.ReadChars((int)Clength - 6);
break;
}
}
if (!is3ds)
{
return(new IOReadResult(IOCode.FileAccessError, "File is not in .3DS format"));
}
else if (!hasMesh)
{
return(new IOReadResult(IOCode.FileParsingError, "no mesh found in file"));
}
else
{
return(new IOReadResult(IOCode.Ok, ""));
}
}
protected Vector2f bilerp(ref Vector2f v00, ref Vector2f v10, ref Vector2f v11, ref Vector2f v01, float tx, float ty)
{
var a = Vector2f.Lerp(ref v00, ref v01, ty);
var b = Vector2f.Lerp(ref v10, ref v11, ty);
return(Vector2f.Lerp(a, b, tx));
}
public Segment2f(Vector2f center, Vector2f direction, float extent)
{
Center = center; Direction = direction; Extent = extent;
}
public void MoveMin(Vector2f vNewMin)
{
Max.x = vNewMin.x + (Max.x - Min.x);
Max.y = vNewMin.y + (Max.y - Min.y);
Min.Set(vNewMin);
}
public AxisAlignedBox2f(float fWidth, float fHeight)
{
Min = new Vector2f(0, 0);
Max = new Vector2f(fWidth, fHeight);
}
public AxisAlignedBox2f(float fSquareSize)
{
Min = new Vector2f(0, 0);
Max = new Vector2f(fSquareSize, fSquareSize);
}
//! relative translation
public void Translate(Vector2f vTranslate)
{
Min.Add(vTranslate);
Max.Add(vTranslate);
}
public bool Contains(Vector2f v)
{
return((Min.x < v.x) && (Min.y < v.y) && (Max.x > v.x) && (Max.y > v.y));
}
public AxisAlignedBox2f(float xmin, float ymin, float xmax, float ymax)
{
Min = new Vector2f(xmin, ymin);
Max = new Vector2f(xmax, ymax);
}
public AxisAlignedBox2f(bool bIgnore)
{
Min = new Vector2f(Single.MaxValue, Single.MaxValue);
Max = new Vector2f(Single.MinValue, Single.MinValue);
}
public override MeshGenerator 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);
}
}
return(this);
}
public AxisAlignedBox2f(Vector2f vMin, Vector2f vMax)
{
Min = new Vector2f(Math.Min(vMin.x, vMax.x), Math.Min(vMin.y, vMax.y));
Max = new Vector2f(Math.Max(vMin.x, vMax.x), Math.Max(vMin.y, vMax.y));
}
public IOWriteResult Write(TextWriter writer, List <WriteMesh> vMeshes, WriteOptions options)
{
if (options.groupNamePrefix != null)
{
GroupNamePrefix = options.groupNamePrefix;
}
if (options.GroupNameF != null)
{
GroupNameF = options.GroupNameF;
}
int nAccumCountV = 1; // OBJ indices always start at 1
int nAccumCountUV = 1;
// collect materials
string sMaterialLib = "";
int nHaveMaterials = 0;
if (options.bWriteMaterials && options.MaterialFilePath.Length > 0)
{
List <GenericMaterial> vMaterials = MeshIOUtil.FindUniqueMaterialList(vMeshes);
IOWriteResult ok = write_materials(vMaterials, options);
if (ok.code == IOCode.Ok)
{
sMaterialLib = Path.GetFileName(options.MaterialFilePath);
nHaveMaterials = vMeshes.Count;
}
}
if (options.AsciiHeaderFunc != null)
{
writer.WriteLine(options.AsciiHeaderFunc());
}
if (sMaterialLib != "")
{
writer.WriteLine("mtllib {0}", sMaterialLib);
}
for (int mi = 0; mi < vMeshes.Count; ++mi)
{
IMesh mesh = vMeshes[mi].Mesh;
if (options.ProgressFunc != null)
{
options.ProgressFunc(mi, vMeshes.Count);
}
bool bVtxColors = options.bPerVertexColors && mesh.HasVertexColors;
bool bNormals = options.bPerVertexNormals && mesh.HasVertexNormals;
// use separate UV set if we have it, otherwise write per-vertex UVs if we have those
bool bVtxUVs = options.bPerVertexUVs && mesh.HasVertexUVs;
if (vMeshes[mi].UVs != null)
{
bVtxUVs = false;
}
int[] mapV = new int[mesh.MaxVertexID];
if (vMeshes[mi].Name != null)
{
writer.WriteLine("o " + vMeshes[mi].Name);
}
// write vertices for this mesh
foreach (int vi in mesh.VertexIndices())
{
mapV[vi] = nAccumCountV++;
Vector3d v = mesh.GetVertex(vi);
if (bVtxColors)
{
Vector3d c = mesh.GetVertexColor(vi);
writer.WriteLine("v {0} {1} {2} {3:F8} {4:F8} {5:F8}", v[0], v[1], v[2], c[0], c[1], c[2]);
}
else
{
writer.WriteLine("v {0} {1} {2}", v[0], v[1], v[2]);
}
if (bNormals)
{
Vector3d n = mesh.GetVertexNormal(vi);
writer.WriteLine("vn {0:F10} {1:F10} {2:F10}", n[0], n[1], n[2]);
}
if (bVtxUVs)
{
Vector2f uv = mesh.GetVertexUV(vi);
writer.WriteLine("vt {0:F10} {1:F10}", uv.x, uv.y);
}
}
// write independent UVs for this mesh, if we have them
IIndexMap mapUV = (bVtxUVs) ? new IdentityIndexMap() : null;
DenseUVMesh uvSet = null;
if (vMeshes[mi].UVs != null)
{
uvSet = vMeshes[mi].UVs;
int nUV = uvSet.UVs.Length;
IndexMap fullMap = new IndexMap(false, nUV); // [TODO] do we really need a map here? is just integer shift, no?
for (int ui = 0; ui < nUV; ++ui)
{
writer.WriteLine("vt {0:F8} {1:F8}", uvSet.UVs[ui].x, uvSet.UVs[ui].y);
fullMap[ui] = nAccumCountUV++;
}
mapUV = fullMap;
}
// check if we need to write usemtl lines for this mesh
bool bWriteMaterials = nHaveMaterials > 0 &&
vMeshes[mi].TriToMaterialMap != null &&
vMeshes[mi].Materials != null;
// various ways we can write triangles to minimize state changes...
// [TODO] support writing materials when mesh has groups!!
if (options.bWriteGroups && mesh.HasTriangleGroups)
{
write_triangles_bygroup(writer, mesh, mapV, uvSet, mapUV, bNormals);
}
else
{
write_triangles_flat(writer, vMeshes[mi], mapV, uvSet, mapUV, bNormals, bWriteMaterials);
}
if (options.ProgressFunc != null)
{
options.ProgressFunc(mi + 1, vMeshes.Count);
}
}
return(new IOWriteResult(IOCode.Ok, ""));
}
public AxisAlignedBox2f(Vector2f vCenter, float fHalfWidth)
{
Min = new Vector2f(vCenter.x - fHalfWidth, vCenter.y - fHalfWidth);
Max = new Vector2f(vCenter.x + fHalfWidth, vCenter.y + fHalfWidth);
}
public void SetVertexUV(int vID, Vector2f UV)
{
Meshes[nActiveMesh].SetVertexUV(vID, UV);
}
public AxisAlignedBox2f(Vector2f vCenter)
{
Min = Max = vCenter;
}
public float Project(Vector2f p)
{
return((p - Center).Dot(Direction));
}
public AxisAlignedBox2f(AxisAlignedBox2f o)
{
Min = new Vector2f(o.Min);
Max = new Vector2f(o.Max);
}
public Vector2d(Vector2f copy)
{
x = copy.x; y = copy.y;
}
public void expandToContain(Vector2f v)
{
min = min.min(v);
max = max.max(v);
}
// u^T*M*v
public float QForm(Vector2f u, Vector2f v)
{
return(u.Dot(this * v));
}
override public MeshGenerator 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.FromPlaneUV((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);
}
}
return(this);
}