c6203678e1
The "glx" prefix on the names of SolveSpace's various GL helper routines was confusingly similar to those used by official OpenGL-associated libraries (e.g. "glu" used by the GL Utility library, and "glX" used by GLX), and could thus give the erroneous impression that it represented a system API rather than ordinary application logic. We thus rename these routines to have an "ssgl" prefix, clearly identifying them with SolveSpace while retaining some visual kinship to GL function names.
571 lines
20 KiB
C++
571 lines
20 KiB
C++
//-----------------------------------------------------------------------------
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// Routines to generate our watertight brep shells from the operations
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// and entities specified by the user in each group; templated to work either
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// on an SShell of ratpoly surfaces or on an SMesh of triangles.
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//
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// Copyright 2008-2013 Jonathan Westhues.
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//-----------------------------------------------------------------------------
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#include "solvespace.h"
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#define gs (SS.GW.gs)
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void Group::AssembleLoops(bool *allClosed,
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bool *allCoplanar,
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bool *allNonZeroLen)
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{
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SBezierList sbl;
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ZERO(&sbl);
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int i;
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for(i = 0; i < SK.entity.n; i++) {
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Entity *e = &(SK.entity.elem[i]);
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if(e->group.v != h.v) continue;
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if(e->construction) continue;
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if(e->forceHidden) continue;
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e->GenerateBezierCurves(&sbl);
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}
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SBezier *sb;
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*allNonZeroLen = true;
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for(sb = sbl.l.First(); sb; sb = sbl.l.NextAfter(sb)) {
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for(i = 1; i <= sb->deg; i++) {
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if(!(sb->ctrl[i]).Equals(sb->ctrl[0])) {
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break;
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}
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}
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if(i > sb->deg) {
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// This is a zero-length edge.
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*allNonZeroLen = false;
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polyError.errorPointAt = sb->ctrl[0];
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goto done;
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}
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}
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// Try to assemble all these Beziers into loops. The closed loops go into
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// bezierLoops, with the outer loops grouped with their holes. The
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// leftovers, if any, go in bezierOpens.
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bezierLoops.FindOuterFacesFrom(&sbl, &polyLoops, NULL,
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SS.ChordTolMm(),
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allClosed, &(polyError.notClosedAt),
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allCoplanar, &(polyError.errorPointAt),
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&bezierOpens);
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done:
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sbl.Clear();
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}
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void Group::GenerateLoops(void) {
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polyLoops.Clear();
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bezierLoops.Clear();
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bezierOpens.Clear();
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if(type == DRAWING_3D || type == DRAWING_WORKPLANE ||
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type == ROTATE || type == TRANSLATE || type == IMPORTED)
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{
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bool allClosed = false, allCoplanar = false, allNonZeroLen = false;
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AssembleLoops(&allClosed, &allCoplanar, &allNonZeroLen);
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if(!allCoplanar) {
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polyError.how = POLY_NOT_COPLANAR;
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} else if(!allClosed) {
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polyError.how = POLY_NOT_CLOSED;
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} else if(!allNonZeroLen) {
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polyError.how = POLY_ZERO_LEN_EDGE;
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} else {
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polyError.how = POLY_GOOD;
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// The self-intersecting check is kind of slow, so don't run it
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// unless requested.
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if(SS.checkClosedContour) {
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if(polyLoops.SelfIntersecting(&(polyError.errorPointAt))) {
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polyError.how = POLY_SELF_INTERSECTING;
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}
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}
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}
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}
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}
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void SShell::RemapFaces(Group *g, int remap) {
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SSurface *ss;
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for(ss = surface.First(); ss; ss = surface.NextAfter(ss)){
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hEntity face = { ss->face };
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if(face.v == Entity::NO_ENTITY.v) continue;
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face = g->Remap(face, remap);
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ss->face = face.v;
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}
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}
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void SMesh::RemapFaces(Group *g, int remap) {
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STriangle *tr;
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for(tr = l.First(); tr; tr = l.NextAfter(tr)) {
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hEntity face = { tr->meta.face };
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if(face.v == Entity::NO_ENTITY.v) continue;
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face = g->Remap(face, remap);
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tr->meta.face = face.v;
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}
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}
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template<class T>
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void Group::GenerateForStepAndRepeat(T *steps, T *outs) {
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T workA, workB;
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ZERO(&workA);
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ZERO(&workB);
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T *soFar = &workA, *scratch = &workB;
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int n = (int)valA, a0 = 0;
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if(subtype == ONE_SIDED && skipFirst) {
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a0++; n++;
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}
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int a;
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for(a = a0; a < n; a++) {
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int ap = a*2 - (subtype == ONE_SIDED ? 0 : (n-1));
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int remap = (a == (n - 1)) ? REMAP_LAST : a;
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T transd;
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ZERO(&transd);
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if(type == TRANSLATE) {
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Vector trans = Vector::From(h.param(0), h.param(1), h.param(2));
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trans = trans.ScaledBy(ap);
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transd.MakeFromTransformationOf(steps,
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trans, Quaternion::IDENTITY, 1.0);
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} else {
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Vector trans = Vector::From(h.param(0), h.param(1), h.param(2));
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double theta = ap * SK.GetParam(h.param(3))->val;
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double c = cos(theta), s = sin(theta);
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Vector axis = Vector::From(h.param(4), h.param(5), h.param(6));
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Quaternion q = Quaternion::From(c, s*axis.x, s*axis.y, s*axis.z);
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// Rotation is centered at t; so A(x - t) + t = Ax + (t - At)
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transd.MakeFromTransformationOf(steps,
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trans.Minus(q.Rotate(trans)), q, 1.0);
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}
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// We need to rewrite any plane face entities to the transformed ones.
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transd.RemapFaces(this, remap);
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// And tack this transformed copy on to the return.
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if(soFar->IsEmpty()) {
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scratch->MakeFromCopyOf(&transd);
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} else {
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scratch->MakeFromUnionOf(soFar, &transd);
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}
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SWAP(T *, scratch, soFar);
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scratch->Clear();
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transd.Clear();
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}
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outs->Clear();
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*outs = *soFar;
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}
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template<class T>
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void Group::GenerateForBoolean(T *prevs, T *thiss, T *outs, int how) {
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// If this group contributes no new mesh, then our running mesh is the
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// same as last time, no combining required. Likewise if we have a mesh
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// but it's suppressed.
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if(thiss->IsEmpty() || suppress) {
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outs->MakeFromCopyOf(prevs);
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return;
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}
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// So our group's shell appears in thisShell. Combine this with the
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// previous group's shell, using the requested operation.
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if(how == COMBINE_AS_UNION) {
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outs->MakeFromUnionOf(prevs, thiss);
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} else if(how == COMBINE_AS_DIFFERENCE) {
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outs->MakeFromDifferenceOf(prevs, thiss);
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} else {
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outs->MakeFromAssemblyOf(prevs, thiss);
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}
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}
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void Group::GenerateShellAndMesh(void) {
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bool prevBooleanFailed = booleanFailed;
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booleanFailed = false;
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Group *srcg = this;
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thisShell.Clear();
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thisMesh.Clear();
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runningShell.Clear();
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runningMesh.Clear();
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// Don't attempt a lathe or extrusion unless the source section is good:
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// planar and not self-intersecting.
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bool haveSrc = true;
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if(type == EXTRUDE || type == LATHE) {
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Group *src = SK.GetGroup(opA);
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if(src->polyError.how != POLY_GOOD) {
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haveSrc = false;
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}
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}
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if(type == TRANSLATE || type == ROTATE) {
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// A step and repeat gets merged against the group's prevous group,
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// not our own previous group.
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srcg = SK.GetGroup(opA);
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GenerateForStepAndRepeat<SShell>(&(srcg->thisShell), &thisShell);
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GenerateForStepAndRepeat<SMesh> (&(srcg->thisMesh), &thisMesh);
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} else if(type == EXTRUDE && haveSrc) {
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Group *src = SK.GetGroup(opA);
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Vector translate = Vector::From(h.param(0), h.param(1), h.param(2));
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Vector tbot, ttop;
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if(subtype == ONE_SIDED) {
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tbot = Vector::From(0, 0, 0); ttop = translate.ScaledBy(2);
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} else {
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tbot = translate.ScaledBy(-1); ttop = translate.ScaledBy(1);
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}
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SBezierLoopSetSet *sblss = &(src->bezierLoops);
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SBezierLoopSet *sbls;
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for(sbls = sblss->l.First(); sbls; sbls = sblss->l.NextAfter(sbls)) {
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int is = thisShell.surface.n;
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// Extrude this outer contour (plus its inner contours, if present)
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thisShell.MakeFromExtrusionOf(sbls, tbot, ttop, color);
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// And for any plane faces, annotate the model with the entity for
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// that face, so that the user can select them with the mouse.
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Vector onOrig = sbls->point;
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int i;
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for(i = is; i < thisShell.surface.n; i++) {
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SSurface *ss = &(thisShell.surface.elem[i]);
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hEntity face = Entity::NO_ENTITY;
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Vector p = ss->PointAt(0, 0),
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n = ss->NormalAt(0, 0).WithMagnitude(1);
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double d = n.Dot(p);
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if(i == is || i == (is + 1)) {
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// These are the top and bottom of the shell.
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if(fabs((onOrig.Plus(ttop)).Dot(n) - d) < LENGTH_EPS) {
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face = Remap(Entity::NO_ENTITY, REMAP_TOP);
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ss->face = face.v;
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}
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if(fabs((onOrig.Plus(tbot)).Dot(n) - d) < LENGTH_EPS) {
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face = Remap(Entity::NO_ENTITY, REMAP_BOTTOM);
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ss->face = face.v;
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}
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continue;
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}
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// So these are the sides
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if(ss->degm != 1 || ss->degn != 1) continue;
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Entity *e;
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for(e = SK.entity.First(); e; e = SK.entity.NextAfter(e)) {
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if(e->group.v != opA.v) continue;
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if(e->type != Entity::LINE_SEGMENT) continue;
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Vector a = SK.GetEntity(e->point[0])->PointGetNum(),
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b = SK.GetEntity(e->point[1])->PointGetNum();
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a = a.Plus(ttop);
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b = b.Plus(ttop);
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// Could get taken backwards, so check all cases.
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if((a.Equals(ss->ctrl[0][0]) && b.Equals(ss->ctrl[1][0])) ||
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(b.Equals(ss->ctrl[0][0]) && a.Equals(ss->ctrl[1][0])) ||
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(a.Equals(ss->ctrl[0][1]) && b.Equals(ss->ctrl[1][1])) ||
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(b.Equals(ss->ctrl[0][1]) && a.Equals(ss->ctrl[1][1])))
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{
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face = Remap(e->h, REMAP_LINE_TO_FACE);
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ss->face = face.v;
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break;
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}
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}
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}
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}
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} else if(type == LATHE && haveSrc) {
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Group *src = SK.GetGroup(opA);
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Vector pt = SK.GetEntity(predef.origin)->PointGetNum(),
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axis = SK.GetEntity(predef.entityB)->VectorGetNum();
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axis = axis.WithMagnitude(1);
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SBezierLoopSetSet *sblss = &(src->bezierLoops);
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SBezierLoopSet *sbls;
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for(sbls = sblss->l.First(); sbls; sbls = sblss->l.NextAfter(sbls)) {
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thisShell.MakeFromRevolutionOf(sbls, pt, axis, color);
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}
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} else if(type == IMPORTED) {
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// The imported shell or mesh are copied over, with the appropriate
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// transformation applied. We also must remap the face entities.
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Vector offset = {
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SK.GetParam(h.param(0))->val,
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SK.GetParam(h.param(1))->val,
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SK.GetParam(h.param(2))->val };
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Quaternion q = {
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SK.GetParam(h.param(3))->val,
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SK.GetParam(h.param(4))->val,
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SK.GetParam(h.param(5))->val,
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SK.GetParam(h.param(6))->val };
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thisMesh.MakeFromTransformationOf(&impMesh, offset, q, scale);
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thisMesh.RemapFaces(this, 0);
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thisShell.MakeFromTransformationOf(&impShell, offset, q, scale);
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thisShell.RemapFaces(this, 0);
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}
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if(srcg->meshCombine != COMBINE_AS_ASSEMBLE) {
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thisShell.MergeCoincidentSurfaces();
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}
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// So now we've got the mesh or shell for this group. Combine it with
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// the previous group's mesh or shell with the requested Boolean, and
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// we're done.
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Group *prevg = srcg->RunningMeshGroup();
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if(prevg->runningMesh.IsEmpty() && thisMesh.IsEmpty() && !forceToMesh) {
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SShell *prevs = &(prevg->runningShell);
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GenerateForBoolean<SShell>(prevs, &thisShell, &runningShell,
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srcg->meshCombine);
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if(srcg->meshCombine != COMBINE_AS_ASSEMBLE) {
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runningShell.MergeCoincidentSurfaces();
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}
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// If the Boolean failed, then we should note that in the text screen
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// for this group.
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booleanFailed = runningShell.booleanFailed;
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if(booleanFailed != prevBooleanFailed) {
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SS.later.showTW = true;
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}
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} else {
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SMesh prevm, thism;
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ZERO(&prevm);
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ZERO(&thism);
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prevm.MakeFromCopyOf(&(prevg->runningMesh));
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prevg->runningShell.TriangulateInto(&prevm);
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thism.MakeFromCopyOf(&thisMesh);
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thisShell.TriangulateInto(&thism);
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SMesh outm;
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ZERO(&outm);
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GenerateForBoolean<SMesh>(&prevm, &thism, &outm, srcg->meshCombine);
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// And make sure that the output mesh is vertex-to-vertex.
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SKdNode *root = SKdNode::From(&outm);
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root->SnapToMesh(&outm);
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root->MakeMeshInto(&runningMesh);
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outm.Clear();
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thism.Clear();
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prevm.Clear();
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}
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displayDirty = true;
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}
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void Group::GenerateDisplayItems(void) {
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// This is potentially slow (since we've got to triangulate a shell, or
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// to find the emphasized edges for a mesh), so we will run it only
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// if its inputs have changed.
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if(displayDirty) {
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Group *pg = RunningMeshGroup();
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if(pg && thisMesh.IsEmpty() && thisShell.IsEmpty()) {
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// We don't contribute any new solid model in this group, so our
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// display items are identical to the previous group's; which means
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// that we can just display those, and stop ourselves from
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// recalculating for those every time we get a change in this group.
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//
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// Note that this can end up recursing multiple times (if multiple
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// groups that contribute no solid model exist in sequence), but
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// that's okay.
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pg->GenerateDisplayItems();
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displayMesh.Clear();
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displayMesh.MakeFromCopyOf(&(pg->displayMesh));
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displayEdges.Clear();
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if(SS.GW.showEdges) {
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SEdge *se;
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SEdgeList *src = &(pg->displayEdges);
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for(se = src->l.First(); se; se = src->l.NextAfter(se)) {
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displayEdges.l.Add(se);
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}
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}
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} else {
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// We do contribute new solid model, so we have to triangulate the
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// shell, and edge-find the mesh.
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displayMesh.Clear();
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runningShell.TriangulateInto(&displayMesh);
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STriangle *t;
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for(t = runningMesh.l.First(); t; t = runningMesh.l.NextAfter(t)) {
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STriangle trn = *t;
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Vector n = trn.Normal();
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trn.an = n;
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trn.bn = n;
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trn.cn = n;
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displayMesh.AddTriangle(&trn);
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}
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displayEdges.Clear();
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if(SS.GW.showEdges) {
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runningShell.MakeEdgesInto(&displayEdges);
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runningMesh.MakeEmphasizedEdgesInto(&displayEdges);
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}
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}
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displayDirty = false;
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}
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}
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Group *Group::PreviousGroup(void) {
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int i;
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for(i = 0; i < SK.group.n; i++) {
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Group *g = &(SK.group.elem[i]);
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if(g->h.v == h.v) break;
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}
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if(i == 0 || i >= SK.group.n) return NULL;
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return &(SK.group.elem[i-1]);
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}
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Group *Group::RunningMeshGroup(void) {
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if(type == TRANSLATE || type == ROTATE) {
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return SK.GetGroup(opA)->RunningMeshGroup();
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} else {
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return PreviousGroup();
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}
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}
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void Group::DrawDisplayItems(int t) {
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RgbColor specColor;
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if(t == DRAWING_3D || t == DRAWING_WORKPLANE) {
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// force the color to something dim
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specColor = Style::Color(Style::DIM_SOLID);
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} else {
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specColor = RgbColor::Default(); // use the model color
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}
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// The back faces are drawn in red; should never seem them, since we
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// draw closed shells, so that's a debugging aid.
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GLfloat mpb[] = { 1.0f, 0.1f, 0.1f, 1.0f };
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glMaterialfv(GL_BACK, GL_AMBIENT_AND_DIFFUSE, mpb);
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// When we fill the mesh, we need to know which triangles are selected
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// or hovered, in order to draw them differently.
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uint32_t mh = 0, ms1 = 0, ms2 = 0;
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hEntity he = SS.GW.hover.entity;
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if(he.v != 0 && SK.GetEntity(he)->IsFace()) {
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mh = he.v;
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}
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SS.GW.GroupSelection();
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if(gs.faces > 0) ms1 = gs.face[0].v;
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if(gs.faces > 1) ms2 = gs.face[1].v;
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if(SS.GW.showShaded) {
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glEnable(GL_LIGHTING);
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ssglFillMesh(specColor, &displayMesh, mh, ms1, ms2);
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glDisable(GL_LIGHTING);
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}
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if(SS.GW.showEdges) {
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ssglDepthRangeOffset(2);
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ssglColorRGB(Style::Color(Style::SOLID_EDGE));
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glLineWidth(Style::Width(Style::SOLID_EDGE));
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ssglDrawEdges(&displayEdges, false);
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}
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if(SS.GW.showMesh) ssglDebugMesh(&displayMesh);
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}
|
|
|
|
void Group::Draw(void) {
|
|
// Everything here gets drawn whether or not the group is hidden; we
|
|
// can control this stuff independently, with show/hide solids, edges,
|
|
// mesh, etc.
|
|
|
|
GenerateDisplayItems();
|
|
DrawDisplayItems(type);
|
|
|
|
if(!SS.checkClosedContour) return;
|
|
|
|
// And finally show the polygons too, and any errors if it's not possible
|
|
// to assemble the lines into closed polygons.
|
|
if(polyError.how == POLY_NOT_CLOSED) {
|
|
// Report this error only in sketch-in-workplane groups; otherwise
|
|
// it's just a nuisance.
|
|
if(type == DRAWING_WORKPLANE) {
|
|
glDisable(GL_DEPTH_TEST);
|
|
ssglColorRGBa(Style::Color(Style::DRAW_ERROR), 0.2);
|
|
glLineWidth (Style::Width(Style::DRAW_ERROR));
|
|
glBegin(GL_LINES);
|
|
ssglVertex3v(polyError.notClosedAt.a);
|
|
ssglVertex3v(polyError.notClosedAt.b);
|
|
glEnd();
|
|
ssglColorRGB(Style::Color(Style::DRAW_ERROR));
|
|
ssglWriteText("not closed contour, or not all same style!",
|
|
DEFAULT_TEXT_HEIGHT,
|
|
polyError.notClosedAt.b, SS.GW.projRight, SS.GW.projUp,
|
|
NULL, NULL);
|
|
glEnable(GL_DEPTH_TEST);
|
|
}
|
|
} else if(polyError.how == POLY_NOT_COPLANAR ||
|
|
polyError.how == POLY_SELF_INTERSECTING ||
|
|
polyError.how == POLY_ZERO_LEN_EDGE)
|
|
{
|
|
// These errors occur at points, not lines
|
|
if(type == DRAWING_WORKPLANE) {
|
|
glDisable(GL_DEPTH_TEST);
|
|
ssglColorRGB(Style::Color(Style::DRAW_ERROR));
|
|
const char *msg;
|
|
if(polyError.how == POLY_NOT_COPLANAR) {
|
|
msg = "points not all coplanar!";
|
|
} else if(polyError.how == POLY_SELF_INTERSECTING) {
|
|
msg = "contour is self-intersecting!";
|
|
} else {
|
|
msg = "zero-length edge!";
|
|
}
|
|
ssglWriteText(msg, DEFAULT_TEXT_HEIGHT,
|
|
polyError.errorPointAt, SS.GW.projRight, SS.GW.projUp,
|
|
NULL, NULL);
|
|
glEnable(GL_DEPTH_TEST);
|
|
}
|
|
} else {
|
|
// The contours will get filled in DrawFilledPaths.
|
|
}
|
|
}
|
|
|
|
void Group::FillLoopSetAsPolygon(SBezierLoopSet *sbls) {
|
|
SPolygon sp;
|
|
ZERO(&sp);
|
|
sbls->MakePwlInto(&sp);
|
|
ssglDepthRangeOffset(1);
|
|
ssglFillPolygon(&sp);
|
|
ssglDepthRangeOffset(0);
|
|
sp.Clear();
|
|
}
|
|
|
|
void Group::DrawFilledPaths(void) {
|
|
SBezierLoopSet *sbls;
|
|
SBezierLoopSetSet *sblss = &bezierLoops;
|
|
for(sbls = sblss->l.First(); sbls; sbls = sblss->l.NextAfter(sbls)) {
|
|
if(sbls->l.n == 0 || sbls->l.elem[0].l.n == 0) continue;
|
|
// In an assembled loop, all the styles should be the same; so doesn't
|
|
// matter which one we grab.
|
|
SBezier *sb = &(sbls->l.elem[0].l.elem[0]);
|
|
hStyle hs = { (uint32_t)sb->auxA };
|
|
Style *s = Style::Get(hs);
|
|
if(s->filled) {
|
|
// This is a filled loop, where the user specified a fill color.
|
|
ssglColorRGBa(s->fillColor, 1);
|
|
FillLoopSetAsPolygon(sbls);
|
|
} else {
|
|
if(h.v == SS.GW.activeGroup.v && SS.checkClosedContour &&
|
|
polyError.how == POLY_GOOD)
|
|
{
|
|
// If this is the active group, and we are supposed to check
|
|
// for closed contours, and we do indeed have a closed and
|
|
// non-intersecting contour, then fill it dimly.
|
|
ssglColorRGBa(Style::Color(Style::CONTOUR_FILL), 0.5);
|
|
ssglDepthRangeOffset(1);
|
|
FillLoopSetAsPolygon(sbls);
|
|
ssglDepthRangeOffset(0);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|