public Segment3f(Vector3f p0, Vector3f p1)
{
//update_from_endpoints(p0, p1);
Center = 0.5f * (p0 + p1);
Direction = p1 - p0;
Extent = 0.5f * Direction.Normalize();
}
public static float PlaneAngleD(Vector3f a, Vector3f b, int nPlaneNormalIdx = 1)
{
a[nPlaneNormalIdx] = b[nPlaneNormalIdx] = 0.0f;
a.Normalize();
b.Normalize();
return(Vector3f.AngleD(a, b));
}
public void Scale(Vector3f s)
{
Center *= s;
Extent *= s;
AxisX *= s; AxisX.Normalize();
AxisY *= s; AxisY.Normalize();
AxisZ *= s; AxisZ.Normalize();
}
public Ray3f(Vector3f origin, Vector3f direction, bool bIsNormalized = false)
{
this.Origin = origin;
this.Direction = direction;
if (bIsNormalized == false && Direction.IsNormalized == false)
{
Direction.Normalize();
}
}
public static float PlaneAngleSignedD(Vector3f vFrom, Vector3f vTo, int nPlaneNormalIdx = 1)
{
vFrom[nPlaneNormalIdx] = vTo[nPlaneNormalIdx] = 0.0f;
vFrom.Normalize();
vTo.Normalize();
float fSign = Math.Sign(vFrom.Cross(vTo)[nPlaneNormalIdx]);
float fAngle = fSign * Vector3f.AngleD(vFrom, vTo);
return(fAngle);
}
public static float PlaneAngleSignedD(Vector3f vFrom, Vector3f vTo, Vector3f planeN)
{
vFrom = vFrom - Vector3f.Dot(vFrom, planeN) * planeN;
vTo = vTo - Vector3f.Dot(vTo, planeN) * planeN;
vFrom.Normalize();
vTo.Normalize();
Vector3f c = Vector3f.Cross(vFrom, vTo);
float fSign = Math.Sign(Vector3f.Dot(c, planeN));
float fAngle = fSign * Vector3f.AngleD(vFrom, vTo);
return(fAngle);
}
public static float PlaneAngleSignedD(Vector3f vFrom, Vector3f vTo, int nPlaneNormalIdx = 1)
{
vFrom[nPlaneNormalIdx] = vTo[nPlaneNormalIdx] = 0.0f;
vFrom.Normalize();
vTo.Normalize();
Vector3f c = vFrom.Cross(vTo);
if (c.LengthSquared < MathUtil.ZeroTolerancef)
{ // vectors are parallel
return(vFrom.Dot(vTo) < 0 ? 180.0f : 0);
}
float fSign = Math.Sign(c[nPlaneNormalIdx]);
float fAngle = fSign * Vector3f.AngleD(vFrom, vTo);
return(fAngle);
}
public static float PlaneAngleSignedD(Vector3f vFrom, Vector3f vTo, Vector3f planeN)
{
vFrom = vFrom - Vector3f.Dot(vFrom, planeN) * planeN;
vTo = vTo - Vector3f.Dot(vTo, planeN) * planeN;
vFrom.Normalize();
vTo.Normalize();
var c = Vector3f.Cross(vFrom, vTo);
if (c.LengthSquared < MathUtil.ZeroTolerancef)
{ // vectors are parallel
return(vFrom.Dot(vTo) < 0 ? 180.0f : 0);
}
float fSign = Math.Sign(Vector3f.Dot(c, planeN));
float fAngle = fSign * Vector3f.AngleD(vFrom, vTo);
return(fAngle);
}
override public MeshGenerator Generate()
{
bool bClosed = ((EndAngleDeg - StartAngleDeg) > 359.99f);
int nRingSize = (NoSharedVertices && bClosed) ? Slices + 1 : Slices;
vertices = new VectorArray3d(2 * nRingSize);
uv = new VectorArray2f(vertices.Count);
normals = new VectorArray3f(vertices.Count);
triangles = new IndexArray3i(2 * Slices);
float fTotalRange = (EndAngleDeg - StartAngleDeg) * MathUtil.Deg2Radf;
float fStartRad = StartAngleDeg * MathUtil.Deg2Radf;
float fDelta = (bClosed) ? fTotalRange / Slices : fTotalRange / (Slices - 1);
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);
var n = new Vector3f((float)cosa, 0, (float)sina);
n.Normalize();
normals[k] = normals[nRingSize + k] = n;
}
int ti = 0;
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);
}
if (bClosed && NoSharedVertices == false)
{ // close disc if we went all the way
triangles.Set(ti++, nRingSize - 1, 0, nRingSize, Clockwise);
triangles.Set(ti++, nRingSize - 1, nRingSize, 2 * nRingSize - 1, Clockwise);
}
return(this);
}
public static Matrix4f CreateRotationFromAxisAngle(Vector3f axis, float angle)
{
axis.Normalize();
float cos = (float)Math.Cos(-angle);
float sin = (float)Math.Sin(-angle);
float t = 1f - cos;
float txx = t * axis.x * axis.x; float txy = t * axis.x * axis.y; float txz = t * axis.x * axis.z;
float tyy = t * axis.y * axis.y; float tyz = t * axis.y * axis.z; float tzz = t * axis.z * axis.z;
float sinx = sin * axis.x; float siny = sin * axis.y; float sinz = sin * axis.z;
Matrix4f m = Identity;
m.Row0 = new Vector4f(txx + cos, txy - sinz, txz + siny, 0f);
m.Row1 = new Vector4f(txy + sinz, tyy + cos, tyz - sinx, 0f);
m.Row2 = new Vector4f(txy - siny, tyz + sinx, tzz + cos, 0f);
m.Row3 = new Vector4f(0f, 0f, 0f, 1f);
return(m);
}
void update_from_endpoints(Vector3f p0, Vector3f p1)
{
Center = 0.5f * (p0 + p1);
Direction = p1 - p0;
Extent = 0.5f * Direction.Normalize();
}
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()
{
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 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);
}
}
}
