99 lines
4.3 KiB
C++
99 lines
4.3 KiB
C++
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#include <gtest/gtest.h>
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#include "vde/brep/brep.h"
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#include "vde/brep/modeling.h"
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#include "vde/brep/measure.h"
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#include <cmath>
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using namespace vde::brep;
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using namespace vde::core;
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// ═══════════════════════════════════════════════════════════
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// Volume measurements
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// ═══════════════════════════════════════════════════════════
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TEST(MeasureTest, Volume_UnitBox) {
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// 2×2×2 box centered at origin → volume = 8.0
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auto box = make_box(2, 2, 2);
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double vol = volume(box);
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EXPECT_NEAR(vol, 8.0, 0.2) << "Volume of 2×2×2 box should be ~8.0";
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}
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TEST(MeasureTest, Volume_LargeBox) {
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auto box = make_box(10, 5, 3); // volume = 150
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double vol = volume(box);
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EXPECT_NEAR(vol, 150.0, 1.0) << "Volume of 10×5×3 box should be ~150";
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}
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// ═══════════════════════════════════════════════════════════
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// Surface area measurements
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// ═══════════════════════════════════════════════════════════
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TEST(MeasureTest, SurfaceArea_UnitBox) {
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// 2×2×2 box: 6 faces × 4 = 24.0
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auto box = make_box(2, 2, 2);
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double area = surface_area(box);
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EXPECT_NEAR(area, 24.0, 0.5) << "Surface area of 2×2×2 box should be ~24.0";
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}
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TEST(MeasureTest, SurfaceArea_LargeBox) {
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auto box = make_box(10, 5, 3);
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double area = surface_area(box);
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double expected = 2.0 * (10*5 + 10*3 + 5*3); // 190
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EXPECT_NEAR(area, expected, 2.0) << "Surface area of 10×5×3 box should be ~" << expected;
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}
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// ═══════════════════════════════════════════════════════════
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// Centroid measurements
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// ═══════════════════════════════════════════════════════════
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TEST(MeasureTest, Centroid_BoxAtOrigin) {
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auto box = make_box(2, 2, 2);
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auto c = centroid(box);
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EXPECT_NEAR(c.x(), 0.0, 0.01);
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EXPECT_NEAR(c.y(), 0.0, 0.01);
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EXPECT_NEAR(c.z(), 0.0, 0.01);
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}
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// ═══════════════════════════════════════════════════════════
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// Distance measurements
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// ═══════════════════════════════════════════════════════════
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TEST(MeasureTest, Distance_SeparatedBoxes) {
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auto box1 = make_box(1, 1, 1); // centered at origin, half-size 0.5
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// We can't easily translate boxes, but make_box creates centered boxes
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// so we test two boxes at origin — they overlap
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auto box2 = make_box(1, 1, 1);
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double d = distance(box1, box2);
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// Two identical boxes at origin → overlap → distance ≈ 0
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EXPECT_NEAR(d, 0.0, 0.1) << "Overlapping boxes should have distance ~0";
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}
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TEST(MeasureTest, Distance_OverlappingBoxes) {
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auto box1 = make_box(2, 2, 2);
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auto box2 = make_box(2, 2, 2);
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double d = distance(box1, box2);
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// Overlapping boxes
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EXPECT_NEAR(d, 0.0, 0.1) << "Overlapping boxes should have distance ~0";
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}
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// ═══════════════════════════════════════════════════════════
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// Integration: volume + surface area consistency
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// ═══════════════════════════════════════════════════════════
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TEST(MeasureTest, Volume_NonNegative) {
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auto box = make_box(2, 2, 2);
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EXPECT_GE(volume(box), 0.0);
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}
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TEST(MeasureTest, SurfaceArea_NonNegative) {
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auto box = make_box(2, 2, 2);
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EXPECT_GE(surface_area(box), 0.0);
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}
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TEST(MeasureTest, Distance_NonNegative) {
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auto box1 = make_box(1, 1, 1);
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auto box2 = make_box(1, 1, 1);
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EXPECT_GE(distance(box1, box2), 0.0);
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}
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