376 lines
12 KiB
C++
376 lines
12 KiB
C++
/* Copyright (c) 2011 Khaled Mamou (kmamou at gmail dot com)
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
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3. The names of the contributors may not be used to endorse or promote products derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _CRT_SECURE_NO_WARNINGS
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#define _CRT_SECURE_NO_WARNINGS
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#endif
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#include "btConvexHullComputer.h"
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#include "vhacdMesh.h"
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#include "FloatMath.h"
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#include <fstream>
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#include <iosfwd>
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#include <iostream>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string>
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namespace VHACD {
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Mesh::Mesh()
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{
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m_diag = 1.0;
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}
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Mesh::~Mesh()
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{
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}
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Vec3<double>& Mesh::ComputeCenter(void)
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{
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const size_t nV = GetNPoints();
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if (nV)
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{
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double center[3];
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uint32_t pcount = uint32_t(GetNPoints());
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const double *points = GetPoints();
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uint32_t tcount = uint32_t(GetNTriangles());
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const uint32_t *indices = (const uint32_t *)GetTriangles();
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FLOAT_MATH::fm_computeCentroid(pcount, points, tcount, indices, center);
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m_center.X() = center[0];
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m_center.Y() = center[1];
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m_center.Z() = center[2];
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m_minBB = GetPoint(0);
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m_maxBB = GetPoint(0);
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for (size_t v = 1; v < nV; v++)
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{
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Vec3<double> p = GetPoint(v);
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if (p.X() < m_minBB.X())
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{
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m_minBB.X() = p.X();
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}
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if (p.Y() < m_minBB.Y())
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{
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m_minBB.Y() = p.Y();
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}
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if (p.Z() < m_minBB.Z())
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{
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m_minBB.Z() = p.Z();
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}
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if (p.X() > m_maxBB.X())
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{
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m_maxBB.X() = p.X();
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}
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if (p.Y() > m_maxBB.Y())
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{
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m_maxBB.Y() = p.Y();
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}
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if (p.Z() > m_maxBB.Z())
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{
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m_maxBB.Z() = p.Z();
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}
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}
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}
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return m_center;
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}
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double Mesh::ComputeVolume() const
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{
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const size_t nV = GetNPoints();
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const size_t nT = GetNTriangles();
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if (nV == 0 || nT == 0) {
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return 0.0;
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}
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Vec3<double> bary(0.0, 0.0, 0.0);
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for (size_t v = 0; v < nV; v++) {
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bary += GetPoint(v);
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}
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bary /= static_cast<double>(nV);
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Vec3<double> ver0, ver1, ver2;
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double totalVolume = 0.0;
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for (int32_t t = 0; t < int32_t(nT); t++) {
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const Vec3<int32_t>& tri = GetTriangle(t);
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ver0 = GetPoint(tri[0]);
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ver1 = GetPoint(tri[1]);
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ver2 = GetPoint(tri[2]);
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totalVolume += ComputeVolume4(ver0, ver1, ver2, bary);
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}
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return totalVolume / 6.0;
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}
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void Mesh::ComputeConvexHull(const double* const pts,
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const size_t nPts)
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{
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ResizePoints(0);
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ResizeTriangles(0);
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btConvexHullComputer ch;
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ch.compute(pts, 3 * sizeof(double), (int32_t)nPts, -1.0, -1.0);
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for (int32_t v = 0; v < ch.vertices.size(); v++) {
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AddPoint(Vec3<double>(ch.vertices[v].getX(), ch.vertices[v].getY(), ch.vertices[v].getZ()));
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}
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const int32_t nt = ch.faces.size();
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for (int32_t t = 0; t < nt; ++t) {
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const btConvexHullComputer::Edge* sourceEdge = &(ch.edges[ch.faces[t]]);
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int32_t a = sourceEdge->getSourceVertex();
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int32_t b = sourceEdge->getTargetVertex();
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const btConvexHullComputer::Edge* edge = sourceEdge->getNextEdgeOfFace();
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int32_t c = edge->getTargetVertex();
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while (c != a) {
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AddTriangle(Vec3<int32_t>(a, b, c));
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edge = edge->getNextEdgeOfFace();
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b = c;
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c = edge->getTargetVertex();
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}
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}
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}
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void Mesh::Clip(const Plane& plane,
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SArray<Vec3<double> >& positivePart,
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SArray<Vec3<double> >& negativePart) const
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{
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const size_t nV = GetNPoints();
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if (nV == 0) {
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return;
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}
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double d;
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for (size_t v = 0; v < nV; v++) {
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const Vec3<double>& pt = GetPoint(v);
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d = plane.m_a * pt[0] + plane.m_b * pt[1] + plane.m_c * pt[2] + plane.m_d;
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if (d > 0.0) {
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positivePart.PushBack(pt);
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}
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else if (d < 0.0) {
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negativePart.PushBack(pt);
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}
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else {
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positivePart.PushBack(pt);
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negativePart.PushBack(pt);
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}
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}
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}
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bool Mesh::IsInside(const Vec3<double>& pt) const
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{
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const size_t nV = GetNPoints();
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const size_t nT = GetNTriangles();
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if (nV == 0 || nT == 0) {
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return false;
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}
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Vec3<double> ver0, ver1, ver2;
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double volume;
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for (int32_t t = 0; t < int32_t(nT); t++) {
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const Vec3<int32_t>& tri = GetTriangle(t);
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ver0 = GetPoint(tri[0]);
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ver1 = GetPoint(tri[1]);
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ver2 = GetPoint(tri[2]);
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volume = ComputeVolume4(ver0, ver1, ver2, pt);
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if (volume < 0.0) {
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return false;
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}
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}
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return true;
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}
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double Mesh::ComputeDiagBB()
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{
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const size_t nPoints = GetNPoints();
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if (nPoints == 0)
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return 0.0;
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Vec3<double> minBB = m_points[0];
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Vec3<double> maxBB = m_points[0];
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double x, y, z;
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for (size_t v = 1; v < nPoints; v++) {
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x = m_points[v][0];
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y = m_points[v][1];
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z = m_points[v][2];
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if (x < minBB[0])
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minBB[0] = x;
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else if (x > maxBB[0])
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maxBB[0] = x;
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if (y < minBB[1])
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minBB[1] = y;
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else if (y > maxBB[1])
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maxBB[1] = y;
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if (z < minBB[2])
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minBB[2] = z;
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else if (z > maxBB[2])
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maxBB[2] = z;
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}
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return (m_diag = (maxBB - minBB).GetNorm());
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}
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#ifdef VHACD_DEBUG_MESH
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bool Mesh::SaveVRML2(const std::string& fileName) const
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{
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std::ofstream fout(fileName.c_str());
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if (fout.is_open()) {
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const Material material;
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if (SaveVRML2(fout, material)) {
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fout.close();
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return true;
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}
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return false;
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}
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return false;
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}
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bool Mesh::SaveVRML2(std::ofstream& fout, const Material& material) const
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{
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if (fout.is_open()) {
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fout.setf(std::ios::fixed, std::ios::floatfield);
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fout.setf(std::ios::showpoint);
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fout.precision(6);
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size_t nV = m_points.Size();
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size_t nT = m_triangles.Size();
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fout << "#VRML V2.0 utf8" << std::endl;
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fout << "" << std::endl;
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fout << "# Vertices: " << nV << std::endl;
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fout << "# Triangles: " << nT << std::endl;
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fout << "" << std::endl;
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fout << "Group {" << std::endl;
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fout << " children [" << std::endl;
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fout << " Shape {" << std::endl;
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fout << " appearance Appearance {" << std::endl;
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fout << " material Material {" << std::endl;
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fout << " diffuseColor " << material.m_diffuseColor[0] << " "
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<< material.m_diffuseColor[1] << " "
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<< material.m_diffuseColor[2] << std::endl;
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fout << " ambientIntensity " << material.m_ambientIntensity << std::endl;
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fout << " specularColor " << material.m_specularColor[0] << " "
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<< material.m_specularColor[1] << " "
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<< material.m_specularColor[2] << std::endl;
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fout << " emissiveColor " << material.m_emissiveColor[0] << " "
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<< material.m_emissiveColor[1] << " "
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<< material.m_emissiveColor[2] << std::endl;
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fout << " shininess " << material.m_shininess << std::endl;
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fout << " transparency " << material.m_transparency << std::endl;
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fout << " }" << std::endl;
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fout << " }" << std::endl;
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fout << " geometry IndexedFaceSet {" << std::endl;
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fout << " ccw TRUE" << std::endl;
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fout << " solid TRUE" << std::endl;
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fout << " convex TRUE" << std::endl;
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if (nV > 0) {
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fout << " coord DEF co Coordinate {" << std::endl;
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fout << " point [" << std::endl;
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for (size_t v = 0; v < nV; v++) {
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fout << " " << m_points[v][0] << " "
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<< m_points[v][1] << " "
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<< m_points[v][2] << "," << std::endl;
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}
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fout << " ]" << std::endl;
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fout << " }" << std::endl;
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}
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if (nT > 0) {
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fout << " coordIndex [ " << std::endl;
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for (size_t f = 0; f < nT; f++) {
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fout << " " << m_triangles[f][0] << ", "
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<< m_triangles[f][1] << ", "
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<< m_triangles[f][2] << ", -1," << std::endl;
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}
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fout << " ]" << std::endl;
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}
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fout << " }" << std::endl;
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fout << " }" << std::endl;
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fout << " ]" << std::endl;
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fout << "}" << std::endl;
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return true;
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}
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return false;
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}
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bool Mesh::SaveOFF(const std::string& fileName) const
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{
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std::ofstream fout(fileName.c_str());
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if (fout.is_open()) {
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size_t nV = m_points.Size();
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size_t nT = m_triangles.Size();
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fout << "OFF" << std::endl;
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fout << nV << " " << nT << " " << 0 << std::endl;
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for (size_t v = 0; v < nV; v++) {
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fout << m_points[v][0] << " "
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<< m_points[v][1] << " "
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<< m_points[v][2] << std::endl;
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}
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for (size_t f = 0; f < nT; f++) {
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fout << "3 " << m_triangles[f][0] << " "
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<< m_triangles[f][1] << " "
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<< m_triangles[f][2] << std::endl;
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}
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fout.close();
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return true;
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}
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return false;
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}
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bool Mesh::LoadOFF(const std::string& fileName, bool invert)
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{
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FILE* fid = fopen(fileName.c_str(), "r");
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if (fid) {
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const std::string strOFF("OFF");
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char temp[1024];
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fscanf(fid, "%s", temp);
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if (std::string(temp) != strOFF) {
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fclose(fid);
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return false;
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}
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else {
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int32_t nv = 0;
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int32_t nf = 0;
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int32_t ne = 0;
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fscanf(fid, "%i", &nv);
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fscanf(fid, "%i", &nf);
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fscanf(fid, "%i", &ne);
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m_points.Resize(nv);
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m_triangles.Resize(nf);
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Vec3<double> coord;
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float x, y, z;
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for (int32_t p = 0; p < nv; p++) {
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fscanf(fid, "%f", &x);
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fscanf(fid, "%f", &y);
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fscanf(fid, "%f", &z);
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m_points[p][0] = x;
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m_points[p][1] = y;
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m_points[p][2] = z;
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}
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int32_t i, j, k, s;
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for (int32_t t = 0; t < nf; ++t) {
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fscanf(fid, "%i", &s);
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if (s == 3) {
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fscanf(fid, "%i", &i);
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fscanf(fid, "%i", &j);
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fscanf(fid, "%i", &k);
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m_triangles[t][0] = i;
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if (invert) {
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m_triangles[t][1] = k;
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m_triangles[t][2] = j;
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}
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else {
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m_triangles[t][1] = j;
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m_triangles[t][2] = k;
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}
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}
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else // Fix me: support only triangular meshes
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{
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for (int32_t h = 0; h < s; ++h)
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fscanf(fid, "%i", &s);
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}
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}
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fclose(fid);
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}
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}
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else {
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return false;
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}
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return true;
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}
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#endif // VHACD_DEBUG_MESH
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}
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