茂之钳
b7419a7881
S11-A: SDF 图元库 - 14 种基础形状（inline header） - sphere/box/round_box/torus/capsule/cylinder/cone/plane/ellipsoid - triangular_prism/hex_prism/link/wedge - 2D 挤出（extrusion/extrusion_bounded/revolution） S11-B: SDF 操作 + 域变形 - 锐利布尔: union/intersection/difference - 平滑布尔: smooth_union/smooth_intersection/smooth_difference - 修饰器: round/onion - 域变形: repeat/mirror/rotate/translate/scale/twist/bend/elongate/displace/cheap_bend - 24 项测试 S11-C: CSG 表达式树 + 网格转换 + Python 绑定 - SdfNode 树结构 — 工厂构造函数，递归求值 - sdf_to_mesh — 基于 marching_cubes 的 SDF→网格 - bind_sdf — pybind11 Python 绑定 文件: 14 文件，2,545 行（测试 1,296 行）
87 lines
2.6 KiB
C++
87 lines
2.6 KiB
C++
#include "vde/sdf/sdf_to_mesh.h"
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#include <gtest/gtest.h>
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using namespace vde::sdf;
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using core::Point3D;
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TEST(SdfToMesh, SphereProducesValidMesh) {
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auto sphere = SdfNode::sphere(2.0);
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auto mesh = sdf_to_mesh(sphere, 32, 0.0);
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EXPECT_GT(mesh.vertices.size(), 0u);
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EXPECT_GT(mesh.triangles.size(), 0u);
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// All vertices should be near the sphere surface (r ≈ 2)
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for (const auto& v : mesh.vertices) {
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double r = v.norm();
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EXPECT_NEAR(r, 2.0, 1.0); // coarse resolution → loose tolerance
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}
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// Each triangle should have 3 indices
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for (const auto& tri : mesh.triangles) {
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for (int i = 0; i < 3; ++i) {
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EXPECT_GE(tri[i], 0);
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EXPECT_LT(tri[i], static_cast<int>(mesh.vertices.size()));
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}
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}
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}
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TEST(SdfToMesh, UnionOfTwoSpheres) {
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auto s1 = SdfNode::translate(SdfNode::sphere(1.0), Point3D(-1.5, 0, 0));
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auto s2 = SdfNode::translate(SdfNode::sphere(1.0), Point3D(1.5, 0, 0));
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auto tree = SdfNode::op_union(std::move(s1), std::move(s2));
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auto mesh = sdf_to_mesh(tree, 32, 0.0);
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EXPECT_GT(mesh.vertices.size(), 0u);
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EXPECT_GT(mesh.triangles.size(), 0u);
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}
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TEST(SdfToMesh, BoxProducesValidMesh) {
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auto box = SdfNode::box(Point3D(1, 1, 1));
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auto mesh = sdf_to_mesh(box, 32, 0.0);
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EXPECT_GT(mesh.vertices.size(), 0u);
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EXPECT_GT(mesh.triangles.size(), 0u);
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}
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TEST(SdfToMesh, HigherResolutionProducesMoreTriangles) {
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auto sphere = SdfNode::sphere(1.0);
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auto low = sdf_to_mesh(sphere, 16, 0.0);
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auto high = sdf_to_mesh(sphere, 32, 0.0);
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EXPECT_GT(high.vertices.size(), low.vertices.size());
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}
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TEST(SdfToMesh, LambdaSphere) {
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auto mesh = sdf_to_mesh_lambda(
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[](double x, double y, double z) {
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return std::sqrt(x*x + y*y + z*z) - 2.0;
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},
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Point3D(-3, -3, -3), Point3D(3, 3, 3),
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32, 0.0
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);
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EXPECT_GT(mesh.vertices.size(), 0u);
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EXPECT_GT(mesh.triangles.size(), 0u);
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}
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TEST(SdfToMesh, LambdaBox) {
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auto mesh = sdf_to_mesh_lambda(
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[](double x, double y, double z) {
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double dx = std::abs(x) - 1.0;
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double dy = std::abs(y) - 1.0;
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double dz = std::abs(z) - 1.0;
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return std::sqrt(std::max(dx, 0.0) * std::max(dx, 0.0) +
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std::max(dy, 0.0) * std::max(dy, 0.0) +
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std::max(dz, 0.0) * std::max(dz, 0.0)) +
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std::min(std::max({dx, dy, dz}), 0.0);
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},
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Point3D(-2, -2, -2), Point3D(2, 2, 2),
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32, 0.0
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);
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EXPECT_GT(mesh.vertices.size(), 0u);
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EXPECT_GT(mesh.triangles.size(), 0u);
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}
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