88 lines
2.4 KiB
C++
88 lines
2.4 KiB
C++
//
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// Created by Иван Ильин on 04.11.2021.
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//
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#include <set>
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#include <cmath>
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#include "HitBox.h"
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#include "../Consts.h"
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bool HitBox::Vec3DLess::operator()(const Vec3D& lhs, const Vec3D& rhs) const noexcept {
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if (fabs(lhs.x() - rhs.x()) >= Consts::EPS)
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return lhs.x() < rhs.x();
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else if (fabs(lhs.y() - rhs.y()) >= Consts::EPS)
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return lhs.y() < rhs.y();
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else if (fabs(lhs.z() - rhs.z()) >= Consts::EPS)
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return lhs.z() < rhs.z();
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else
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return false;
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}
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HitBox::HitBox(const Mesh& mesh, bool useSimpleBox) {
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if (useSimpleBox) {
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generateSimple(mesh);
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} else {
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generateDetailed(mesh);
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}
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}
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void HitBox::generateSimple(const Mesh &mesh) {
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double maxX = -std::numeric_limits<double>::max();
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double maxY = -std::numeric_limits<double>::max();
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double maxZ = -std::numeric_limits<double>::max();
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double minX = std::numeric_limits<double>::max();
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double minY = std::numeric_limits<double>::max();
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double minZ = std::numeric_limits<double>::max();
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for(const auto& t : mesh.triangles()) {
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for(int i = 0; i < 3; i++) {
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auto point = Vec3D(t[i]);
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if(point.x() > maxX) {
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maxX = point.x();
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}
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if(point.y() > maxY) {
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maxY = point.y();
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}
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if(point.z() > maxZ) {
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maxZ = point.z();
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}
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if(point.x() < minX) {
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minX = point.x();
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}
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if(point.y() < minY) {
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minY = point.y();
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}
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if(point.z() < minZ) {
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minZ = point.z();
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}
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}
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}
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_hitBox.emplace_back(minX, minY, minZ);
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_hitBox.emplace_back(minX, maxY, minZ);
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_hitBox.emplace_back(maxX, minY, minZ);
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_hitBox.emplace_back(maxX, maxY, minZ);
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_hitBox.emplace_back(minX, minY, maxZ);
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_hitBox.emplace_back(minX, maxY, maxZ);
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_hitBox.emplace_back(maxX, minY, maxZ);
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_hitBox.emplace_back(maxX, maxY, maxZ);
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}
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void HitBox::generateDetailed(const Mesh &mesh) {
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// we dont need to add the same points in hit box
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std::set<Vec3D, HitBox::Vec3DLess> points;
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for (const auto& t : mesh.triangles())
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for (int i = 0; i < 3; i++)
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points.insert(Vec3D(t[i]));
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_hitBox.reserve(points.size());
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for (const auto& it : points)
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_hitBox.push_back(it);
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_hitBox.shrink_to_fit();
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}
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