solvespace/src/polyline.cpp at unmimalloc · vthriller/solvespace · GitHub

History

247 lines (201 loc) · 6.79 KB

Raw

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

//-----------------------------------------------------------------------------

// A helper class to assemble scattered edges into contiguous polylines,

// as nicely as possible.

//-----------------------------------------------------------------------------

#include "solvespace.h"

namespace SolveSpace {

bool PolylineBuilder::Vertex::GetNext(uint32_t kind, Vertex **next, Edge **nextEdge) {

auto it = std::find_if(edges.begin(), edges.end(), [&](const Edge *e) {

return e->tag == 0 && e->kind == kind;

});

if(it != edges.end()) {

(*it)->tag = 1;

*next = (*it)->GetOtherVertex(this);

*nextEdge = *it;

return true;

}

return false;

}

bool PolylineBuilder::Vertex::GetNext(uint32_t kind, Vector plane, double dist,

Vertex **next, Edge **nextEdge) {

Edge *best = NULL;

double minD = VERY_POSITIVE;

for(Edge *e : edges) {

if(e->tag != 0) continue;

if(e->kind != kind) continue;

// We choose the best next edge with minimal distance from the current plane

Vector nextPos = e->GetOtherVertex(this)->pos;

double curD = fabs(plane.Dot(nextPos) - dist);

if(best != NULL && curD > minD) continue;

best = e;

minD = curD;

}

if(best != NULL) {

best->tag = 1;

*next = best->GetOtherVertex(this);

*nextEdge = best;

return true;

}

return false;

}

size_t PolylineBuilder::Vertex::CountEdgesWithTagAndKind(int tag, uint32_t kind) const {

return std::count_if(edges.begin(), edges.end(), [&](const Edge *e) {

return e->tag == tag && e->kind == kind;

});

}

PolylineBuilder::Vertex *PolylineBuilder::Edge::GetOtherVertex(PolylineBuilder::Vertex *v) const {

if(a == v) return b;

if(b == v) return a;

return NULL;

}

size_t PolylineBuilder::VertexPairHash::operator()(const std::pair<Vertex *, Vertex *> &v) const {

return ((uintptr_t)v.first / sizeof(Vertex)) ^

((uintptr_t)v.second / sizeof(Vertex));

}

bool PolylineBuilder::Edge::GetStartAndNext(PolylineBuilder::Vertex **start,

PolylineBuilder::Vertex **next, bool loop) const {

size_t numA = a->CountEdgesWithTagAndKind(0, kind);

size_t numB = b->CountEdgesWithTagAndKind(0, kind);

if((numA == 1 && numB > 1) || (loop && numA > 1 && numB > 1)) {

*start = a;

*next = b;

return true;

}

if(numA > 1 && numB == 1) {

*start = b;

*next = a;

return true;

}

return false;

}

PolylineBuilder::~PolylineBuilder() {

Clear();

}

void PolylineBuilder::Clear() {

for(Edge *e : edges) {

delete e;

}

edges.clear();

for(auto &v : vertices) {

delete v.second;

}

vertices.clear();

}

PolylineBuilder::Vertex *PolylineBuilder::AddVertex(const Vector &pos) {

auto it = vertices.find(pos);

if(it != vertices.end()) {

return it->second;

}

Vertex *result = new Vertex;

result->pos = pos;

vertices.emplace(pos, result);

return result;

}

PolylineBuilder::Edge *PolylineBuilder::AddEdge(const Vector &p0, const Vector &p1,

uint32_t kind, uintptr_t data) {

Vertex *v0 = AddVertex(p0);

Vertex *v1 = AddVertex(p1);

if(v0 == v1) return NULL;

auto it = edgeMap.find(std::make_pair(v0, v1));

if(it != edgeMap.end()) {

return it->second;

}

PolylineBuilder::Edge *edge = new PolylineBuilder::Edge {};

edge->a = v0;

edge->b = v1;

edge->kind = kind;

edge->tag = 0;

edge->data = data;

edges.push_back(edge);

edgeMap.emplace(std::make_pair(v0, v1), edge);

v0->edges.push_back(edge);

v1->edges.push_back(edge);

return edge;

}

void PolylineBuilder::Generate(

std::function<void(Vertex *start, Vertex *next, Edge *edge)> const &startFunc,

std::function<void(Vertex *next, Edge *edge)> const &nextFunc,

std::function<void(Edge *alone)> const &aloneFunc, std::function<void()> const &endFunc) {

bool found;

bool loop = false;

do {

found = false;

for(PolylineBuilder::Edge *e : edges) {

if(e->tag != 0) continue;

Vertex *start;

Vertex *next;

if(!e->GetStartAndNext(&start, &next, loop)) continue;

Vector startPos = start->pos;

Vector nextPos = next->pos;

found = true;

e->tag = 1;

startFunc(start, next, e);

Edge *nextEdge;

if(next->GetNext(e->kind, &next, &nextEdge)) {

Vector plane = nextPos.Minus(startPos).Cross(next->pos.Minus(startPos));

double dist = plane.Dot(startPos);

nextFunc(next, nextEdge);

while(next->GetNext(e->kind, plane, dist, &next, &nextEdge)) {

nextFunc(next, nextEdge);

}

endFunc();

}

if(!found && !loop) {

loop = true;

found = true;

}

} while(found);

for(PolylineBuilder::Edge *e : edges) {

if(e->tag != 0) continue;

aloneFunc(e);

}

void PolylineBuilder::MakeFromEdges(const SEdgeList &sel) {

for(const SEdge &se : sel.l) {

AddEdge(se.a, se.b, (uint32_t)se.auxA, reinterpret_cast<uintptr_t>(&se));

}

void PolylineBuilder::MakeFromOutlines(const SOutlineList &ol) {

for(const SOutline &so : ol.l) {

// Use outline tag as kind, so that emphasized and contour outlines

// would not be composed together.

AddEdge(so.a, so.b, (uint32_t)so.tag, reinterpret_cast<uintptr_t>(&so));

}

void PolylineBuilder::GenerateEdges(SEdgeList *sel) {

Vector prev;

auto startFunc = [&](Vertex *start, Vertex *next, Edge *e) {

sel->AddEdge(start->pos, next->pos, e->kind);

prev = next->pos;

};

auto nextFunc = [&](Vertex *next, Edge *e) {

sel->AddEdge(prev, next->pos, e->kind);

prev = next->pos;

};

auto aloneFunc = [&](Edge *e) {

sel->AddEdge(e->a->pos, e->b->pos, e->kind);

};

Generate(startFunc, nextFunc, aloneFunc);

}

void PolylineBuilder::GenerateOutlines(SOutlineList *sol) {

Vector prev;

auto startFunc = [&](Vertex *start, Vertex *next, Edge *e) {

SOutline *so = e->outline;

sol->AddEdge(start->pos, next->pos, so->nl, so->nr, so->tag);

prev = next->pos;

};

auto nextFunc = [&](Vertex *next, Edge *e) {

SOutline *so = e->outline;

sol->AddEdge(prev, next->pos, so->nl, so->nr, so->tag);

prev = next->pos;

};

auto aloneFunc = [&](Edge *e) {

SOutline *so = e->outline;

sol->AddEdge(so->a, so->b, so->nl, so->nr, so->tag);

};

Generate(startFunc, nextFunc, aloneFunc);

}

} // namespace SolveSpace

solvespace/src/polyline.cpp at unmimalloc · vthriller/solvespace · GitHub

Expand file tree

Breadcrumbs

polyline.cpp

Latest commit

History

Breadcrumbs

polyline.cpp

File metadata and controls