static void
bezier(BezierShape &shape,float x0, float y0, float x1, float y1, float x2, float y2, float x3, float y3)
{
//DebugPrint(_T("Bezier creating %.2f %.2f-%.2f %.2f-%.2f %.2f-%.2f %.2f\n"),x0,y0,x1,y1,x2,y2,x3,y3);
if(!curSpline)
curSpline = shape.NewSpline();
int knots = curSpline->KnotCount();
if(knots == 0) {
curSpline->AddKnot(SplineKnot(KTYPE_BEZIER, LTYPE_CURVE, Point3(x0,y0,0.0f), Point3(x0,y0,0.0f), Point3(x1,y1,0.0f)));
curSpline->AddKnot(SplineKnot(KTYPE_BEZIER, LTYPE_CURVE, Point3(x3,y3,0.0f), Point3(x2,y2,0.0f), Point3(x3,y3,0.0f)));
}
else {
// First point of this curve must be the same as the last point on the output curve
assert(curSpline->GetKnotPoint(knots-1) == Point3(x0,y0,0.0f));
curSpline->SetOutVec(knots-1, Point3(x1,y1,0.0f));
if(Point3(x3,y3,0.0f) == curSpline->GetKnotPoint(0)) {
curSpline->SetInVec(0, Point3(x2,y2,0.0f));
curSpline->SetClosed();
//DebugPrint(_T("Bezier autoclosed\n"));
curSpline = NULL;
}
else
curSpline->AddKnot(SplineKnot(KTYPE_BEZIER, LTYPE_CURVE, Point3(x3,y3,0.0f), Point3(x2,y2,0.0f), Point3(x3,y3,0.0f)));
}
}
static void MakeCircle(BezierShape& ashape, float radius) {
float vector = CIRCLE_VECTOR_LENGTH * radius;
// Delete all points in the existing spline
Spline3D *spline = ashape.NewSpline();
// Now add all the necessary points
for(int ix=0; ix<4; ++ix) {
float angle = 6.2831853f * (float)ix / 4.0f;
float sinfac = (float)sin(angle), cosfac = (float)cos(angle);
Point3 p(cosfac * radius, sinfac * radius, 0.0f);
Point3 rotvec = Point3(sinfac * vector, -cosfac * vector, 0.0f);
spline->AddKnot(SplineKnot(KTYPE_BEZIER,LTYPE_CURVE,p,p + rotvec,p - rotvec));
}
spline->SetClosed();
spline->ComputeBezPoints();
}
void RectangleObject::BuildShape(TimeValue t, BezierShape& ashape) {
// Start the validity interval at forever and whittle it down.
ivalid = FOREVER;
float length,fillet;
float width;
pblock->GetValue(PB_LENGTH, t, length, ivalid);
pblock->GetValue(PB_WIDTH, t, width, ivalid);
pblock->GetValue(PB_FILLET, t, fillet, ivalid);
LimitValue( length, MIN_LENGTH, MAX_LENGTH );
LimitValue( width, MIN_WIDTH, MAX_WIDTH );
LimitValue( fillet, MIN_WIDTH, MAX_WIDTH );
// Delete the existing shape and create a new spline in it
ashape.NewShape();
// Get parameters from SimpleSpline and place them in the BezierShape
int steps;
BOOL optimize,adaptive;
ipblock->GetValue(IPB_STEPS, t, steps, ivalid);
ipblock->GetValue(IPB_OPTIMIZE, t, optimize, ivalid);
ipblock->GetValue(IPB_ADAPTIVE, t, adaptive, ivalid);
ashape.steps = adaptive ? -1 : steps;
ashape.optimize = optimize;
Spline3D *spline = ashape.NewSpline();
// Now add all the necessary points
// We'll add 'em as auto corners initially, have the spline package compute some vectors (because
// I'm basically lazy and it does a great job, besides) then turn 'em into bezier corners!
float l2 = length / 2.0f;
float w2 = width / 2.0f;
Point3 p = Point3(w2, l2, 0.0f);
int pts=4;
if (fillet>0)
{ pts=8;
float cf=fillet*CIRCLE_VECTOR_LENGTH;
Point3 wvec=Point3(fillet,0.0f,0.0f),lvec=Point3(0.0f,fillet,0.0f);
Point3 cwvec=Point3(cf,0.0f,0.0f),clvec=Point3(0.0f,cf,0.0f);
Point3 p3=p-lvec,p2;
spline->AddKnot(SplineKnot(KTYPE_BEZIER,LTYPE_CURVE,p3,p3-clvec,p3+clvec));
p=p-wvec;
spline->AddKnot(SplineKnot(KTYPE_BEZIER,LTYPE_CURVE,p,p+cwvec,p-cwvec));
p=Point3(-w2,l2,0.0f);p2=p+wvec;
spline->AddKnot(SplineKnot(KTYPE_BEZIER,LTYPE_CURVE,p2,p2+cwvec,p2-cwvec));
p=p-lvec;
spline->AddKnot(SplineKnot(KTYPE_BEZIER,LTYPE_CURVE,p,p+clvec,p-clvec));
p=Point3(-w2,-l2,0.0f);p3=p+lvec;
spline->AddKnot(SplineKnot(KTYPE_BEZIER,LTYPE_CURVE,p3,p3+clvec,p3-clvec));
p=p+wvec;
spline->AddKnot(SplineKnot(KTYPE_BEZIER,LTYPE_CURVE,p,p-cwvec,p+cwvec));
p = Point3(w2, -l2, 0.0f);p3=p-wvec;
spline->AddKnot(SplineKnot(KTYPE_BEZIER,LTYPE_CURVE,p3,p3-cwvec,p3+cwvec));
p=p+lvec;
spline->AddKnot(SplineKnot(KTYPE_BEZIER,LTYPE_CURVE,p,p-clvec,p+clvec));
spline->SetClosed();
spline->ComputeBezPoints();
}
else
{spline->AddKnot(SplineKnot(KTYPE_CORNER,LTYPE_CURVE,p,p,p));
p = Point3(-w2, l2, 0.0f);
spline->AddKnot(SplineKnot(KTYPE_CORNER,LTYPE_CURVE,p,p,p));
p = Point3(-w2, -l2, 0.0f);
spline->AddKnot(SplineKnot(KTYPE_CORNER,LTYPE_CURVE,p,p,p));
p = Point3(w2, -l2, 0.0f);
spline->AddKnot(SplineKnot(KTYPE_CORNER,LTYPE_CURVE,p,p,p));
spline->SetClosed();
spline->ComputeBezPoints();
for(int i = 0; i < 4; ++i)
spline->SetKnotType(i, KTYPE_BEZIER_CORNER);
}
spline->SetClosed();
spline->ComputeBezPoints();
for(int i = 0; i < pts; ++i)
spline->SetKnotType(i, KTYPE_BEZIER_CORNER);
ashape.UpdateSels(); // Make sure it readies the selection set info
ashape.InvalidateGeomCache();
}