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ericw-tools/light/test_light.cc

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#include "gtest/gtest.h"
#include <light/light.hh>
#include <random>
#include <algorithm> // for std::sort
#include <fmt/format.h>
#include <common/qvec.hh>
#include <common/aabb.hh>
using namespace std;
TEST(mathlib, MakeCDF)
{
std::vector<float> pdfUnnormzlied{25, 50, 25};
std::vector<float> cdf = MakeCDF(pdfUnnormzlied);
ASSERT_EQ(3u, cdf.size());
ASSERT_FLOAT_EQ(0.25, cdf.at(0));
ASSERT_FLOAT_EQ(0.75, cdf.at(1));
ASSERT_FLOAT_EQ(1.0, cdf.at(2));
// TODO: return pdf
ASSERT_EQ(0, SampleCDF(cdf, 0));
ASSERT_EQ(0, SampleCDF(cdf, 0.1));
ASSERT_EQ(0, SampleCDF(cdf, 0.25));
ASSERT_EQ(1, SampleCDF(cdf, 0.26));
ASSERT_EQ(1, SampleCDF(cdf, 0.75));
ASSERT_EQ(2, SampleCDF(cdf, 0.76));
ASSERT_EQ(2, SampleCDF(cdf, 1));
}
static void checkBox(const vector<qvec4f> &edges, const vector<qvec3f> &poly)
{
EXPECT_TRUE(GLM_EdgePlanes_PointInside(edges, qvec3f(0, 0, 0)));
EXPECT_TRUE(GLM_EdgePlanes_PointInside(edges, qvec3f(64, 0, 0)));
EXPECT_TRUE(GLM_EdgePlanes_PointInside(edges, qvec3f(32, 32, 0)));
EXPECT_TRUE(GLM_EdgePlanes_PointInside(edges, qvec3f(32, 32, 32))); // off plane
EXPECT_FALSE(GLM_EdgePlanes_PointInside(edges, qvec3f(-0.1, 0, 0)));
EXPECT_FALSE(GLM_EdgePlanes_PointInside(edges, qvec3f(64.1, 0, 0)));
EXPECT_FALSE(GLM_EdgePlanes_PointInside(edges, qvec3f(0, -0.1, 0)));
EXPECT_FALSE(GLM_EdgePlanes_PointInside(edges, qvec3f(0, 64.1, 0)));
}
TEST(mathlib, EdgePlanesOfNonConvexPoly)
{
// hourglass, non-convex
const vector<qvec3f> poly{{0, 0, 0}, {64, 64, 0}, {0, 64, 0}, {64, 0, 0}};
const auto edges = GLM_MakeInwardFacingEdgePlanes(poly);
// EXPECT_EQ(vector<qvec4f>(), edges);
}
TEST(mathlib, SlightlyConcavePoly)
{
const vector<qvec3f> poly{qvec3f(225.846161, -1744, 1774), qvec3f(248, -1744, 1798),
qvec3f(248, -1763.82605, 1799.65222), qvec3f(248, -1764, 1799.66663), qvec3f(248, -1892, 1810.33337),
qvec3f(248, -1893.21741, 1810.43481), qvec3f(248, -1921.59998, 1812.80005), qvec3f(248, -1924, 1813),
qvec3f(80, -1924, 1631), qvec3f(80, -1744, 1616)};
const auto edges = GLM_MakeInwardFacingEdgePlanes(poly);
ASSERT_FALSE(edges.empty());
EXPECT_TRUE(GLM_EdgePlanes_PointInside(edges, qvec3f(152.636963, -1814, 1702)));
}
TEST(mathlib, PointInPolygon)
{
// clockwise
const vector<qvec3f> poly{{0, 0, 0}, {0, 64, 0}, {64, 64, 0}, {64, 0, 0}};
const auto edges = GLM_MakeInwardFacingEdgePlanes(poly);
checkBox(edges, poly);
}
TEST(mathlib, PointInPolygon_DegenerateEdgeHandling)
{
// clockwise
const vector<qvec3f> poly{{0, 0, 0}, {0, 64, 0}, {0, 64, 0}, // repeat of last point
{64, 64, 0}, {64, 0, 0}};
const auto edges = GLM_MakeInwardFacingEdgePlanes(poly);
checkBox(edges, poly);
}
TEST(mathlib, PointInPolygon_DegenerateFaceHandling1)
{
const vector<qvec3f> poly{};
const auto edges = GLM_MakeInwardFacingEdgePlanes(poly);
EXPECT_FALSE(GLM_EdgePlanes_PointInside(edges, qvec3f(0, 0, 0)));
EXPECT_FALSE(GLM_EdgePlanes_PointInside(edges, qvec3f(10, 10, 10)));
}
TEST(mathlib, PointInPolygon_DegenerateFaceHandling2)
{
const vector<qvec3f> poly{
{0, 0, 0},
{0, 0, 0},
{0, 0, 0},
};
const auto edges = GLM_MakeInwardFacingEdgePlanes(poly);
EXPECT_FALSE(GLM_EdgePlanes_PointInside(edges, qvec3f(0, 0, 0)));
EXPECT_FALSE(GLM_EdgePlanes_PointInside(edges, qvec3f(10, 10, 10)));
EXPECT_FALSE(GLM_EdgePlanes_PointInside(edges, qvec3f(-10, -10, -10)));
}
TEST(mathlib, PointInPolygon_DegenerateFaceHandling3)
{
const vector<qvec3f> poly{
{0, 0, 0},
{10, 10, 10},
{20, 20, 20},
};
const auto edges = GLM_MakeInwardFacingEdgePlanes(poly);
EXPECT_FALSE(GLM_EdgePlanes_PointInside(edges, qvec3f(0, 0, 0)));
EXPECT_FALSE(GLM_EdgePlanes_PointInside(edges, qvec3f(10, 10, 10)));
EXPECT_FALSE(GLM_EdgePlanes_PointInside(edges, qvec3f(-10, -10, -10)));
}
TEST(mathlib, PointInPolygon_ColinearPointHandling)
{
// clockwise
const vector<qvec3f> poly{{0, 0, 0}, {0, 32, 0}, // colinear
{0, 64, 0}, {64, 64, 0}, {64, 0, 0}};
const auto edges = GLM_MakeInwardFacingEdgePlanes(poly);
checkBox(edges, poly);
}
TEST(mathlib, ClosestPointOnLineSegment_Degenerate)
{
EXPECT_EQ(qvec3f(0, 0, 0), ClosestPointOnLineSegment(qvec3f(0, 0, 0), qvec3f(0, 0, 0), qvec3f(10, 10, 10)));
}
TEST(mathlib, ClosestPointOnPolyBoundary)
{
// clockwise
const vector<qvec3f> poly{
{0, 0, 0}, // edge 0 start, edge 3 end
{0, 64, 0}, // edge 1 start, edge 0 end
{64, 64, 0}, // edge 2 start, edge 1 end
{64, 0, 0} // edge 3 start, edge 2 end
};
EXPECT_EQ(make_pair(0, qvec3f(0, 0, 0)), GLM_ClosestPointOnPolyBoundary(poly, qvec3f(0, 0, 0)));
// Either edge 1 or 2 contain the point qvec3f(64,64,0), but we expect the first edge to be returned
EXPECT_EQ(make_pair(1, qvec3f(64, 64, 0)), GLM_ClosestPointOnPolyBoundary(poly, qvec3f(100, 100, 100)));
EXPECT_EQ(make_pair(2, qvec3f(64, 32, 0)), GLM_ClosestPointOnPolyBoundary(poly, qvec3f(100, 32, 0)));
EXPECT_EQ(make_pair(0, qvec3f(0, 0, 0)), GLM_ClosestPointOnPolyBoundary(poly, qvec3f(-1, -1, 0)));
}
TEST(mathlib, PolygonCentroid_empty)
{
const std::initializer_list<qvec3d> empty{};
const qvec3f res = qv::PolyCentroid(empty.begin(), empty.end());
for (int i = 0; i < 3; i++) {
EXPECT_TRUE(std::isnan(res[i]));
}
}
TEST(mathlib, PolygonCentroid_point)
{
const std::initializer_list<qvec3d> point{ { 1, 1, 1 } };
EXPECT_EQ(*point.begin(), qv::PolyCentroid(point.begin(), point.end()));
}
TEST(mathlib, PolygonCentroid_line)
{
const std::initializer_list<qvec3d> line{ { 0, 0, 0 }, { 2, 2, 2 } };
EXPECT_EQ(qvec3d(1, 1, 1), qv::PolyCentroid(line.begin(), line.end()));
}
TEST(mathlib, PolygonCentroid)
{
// poor test.. but at least checks that the colinear point is treated correctly
const std::initializer_list<qvec3d> poly{{0, 0, 0}, {0, 32, 0}, // colinear
{0, 64, 0}, {64, 64, 0}, {64, 0, 0}};
EXPECT_EQ(qvec3f(32, 32, 0), qv::PolyCentroid(poly.begin(), poly.end()));
}
TEST(mathlib, PolygonArea)
{
// poor test.. but at least checks that the colinear point is treated correctly
const std::initializer_list<qvec3d> poly{{0, 0, 0}, {0, 32, 0}, // colinear
{0, 64, 0}, {64, 64, 0}, {64, 0, 0}};
EXPECT_EQ(64.0f * 64.0f, qv::PolyArea(poly.begin(), poly.end()));
// 0, 1, or 2 vertices return 0 area
EXPECT_EQ(0.0f, qv::PolyArea(poly.begin(), poly.begin()));
EXPECT_EQ(0.0f, qv::PolyArea(poly.begin(), poly.begin() + 1));
EXPECT_EQ(0.0f, qv::PolyArea(poly.begin(), poly.begin() + 2));
}
TEST(mathlib, BarycentricFromPoint)
{
// clockwise
const std::array<qvec3f, 3> tri { qvec3f{0, 0, 0}, {0, 64, 0}, {64, 0, 0}};
EXPECT_EQ(qvec3f(1, 0, 0), qv::Barycentric_FromPoint(tri[0], tri[0], tri[1], tri[2]));
EXPECT_EQ(qvec3f(0, 1, 0), qv::Barycentric_FromPoint(tri[1], tri[0], tri[1], tri[2]));
EXPECT_EQ(qvec3f(0, 0, 1), qv::Barycentric_FromPoint(tri[2], tri[0], tri[1], tri[2]));
EXPECT_EQ(qvec3f(0.5, 0.5, 0.0), qv::Barycentric_FromPoint({ 0, 32, 0 }, tri[0], tri[1], tri[2]));
EXPECT_EQ(qvec3f(0.0, 0.5, 0.5), qv::Barycentric_FromPoint({ 32, 32, 0 }, tri[0], tri[1], tri[2]));
EXPECT_EQ(qvec3f(0.5, 0.0, 0.5), qv::Barycentric_FromPoint({ 32, 0, 0 }, tri[0], tri[1], tri[2]));
}
TEST(mathlib, BarycentricToPoint)
{
// clockwise
const std::array<qvec3f, 3> tri { qvec3f{0, 0, 0}, {0, 64, 0}, {64, 0, 0}};
EXPECT_EQ(tri[0], qv::Barycentric_ToPoint({ 1, 0, 0 }, tri[0], tri[1], tri[2]));
EXPECT_EQ(tri[1], qv::Barycentric_ToPoint({ 0, 1, 0 }, tri[0], tri[1], tri[2]));
EXPECT_EQ(tri[2], qv::Barycentric_ToPoint({ 0, 0, 1 }, tri[0], tri[1], tri[2]));
EXPECT_EQ(qvec3f(0, 32, 0), qv::Barycentric_ToPoint({ 0.5, 0.5, 0.0 }, tri[0], tri[1], tri[2]));
EXPECT_EQ(qvec3f(32, 32, 0), qv::Barycentric_ToPoint({ 0.0, 0.5, 0.5 }, tri[0], tri[1], tri[2]));
EXPECT_EQ(qvec3f(32, 0, 0), qv::Barycentric_ToPoint({ 0.5, 0.0, 0.5 }, tri[0], tri[1], tri[2]));
}
TEST(mathlib, BarycentricRandom)
{
// clockwise
const std::array<qvec3f, 3> tri { qvec3f{0, 0, 0}, {0, 64, 0}, {64, 0, 0}};
const auto triAsVec = vector<qvec3f>{tri.begin(), tri.end()};
const auto edges = GLM_MakeInwardFacingEdgePlanes(triAsVec);
const auto plane = GLM_PolyPlane(triAsVec);
for (int i = 0; i < 100; i++) {
const float r0 = Random();
const float r1 = Random();
ASSERT_GE(r0, 0);
ASSERT_GE(r1, 0);
ASSERT_LE(r0, 1);
ASSERT_LE(r1, 1);
const auto bary = qv::Barycentric_Random(r0, r1);
EXPECT_FLOAT_EQ(1.0f, bary[0] + bary[1] + bary[2]);
const qvec3f point = qv::Barycentric_ToPoint(bary, tri[0], tri[1], tri[2]);
EXPECT_TRUE(GLM_EdgePlanes_PointInside(edges, point));
EXPECT_FLOAT_EQ(0.0f, GLM_DistAbovePlane(plane, point));
}
}
TEST(mathlib, RotateFromUpToSurfaceNormal)
{
std::mt19937 engine(0);
std::uniform_real_distribution<float> dis(-4096, 4096);
for (int i = 0; i < 100; i++) {
const qvec3f randvec = qv::normalize(qvec3f(dis(engine), dis(engine), dis(engine)));
const qmat3x3f m = RotateFromUpToSurfaceNormal(randvec);
const qvec3f roundtrip = m * qvec3f(0, 0, 1);
ASSERT_TRUE(qv::epsilonEqual(randvec, roundtrip, 0.01f));
}
}
TEST(mathlib, MakePlane)
{
EXPECT_EQ(qvec4f(0, 0, 1, 10), GLM_MakePlane(qvec3f(0, 0, 1), qvec3f(0, 0, 10)));
EXPECT_EQ(qvec4f(0, 0, 1, 10), GLM_MakePlane(qvec3f(0, 0, 1), qvec3f(100, 100, 10)));
}
TEST(mathlib, DistAbovePlane)
{
qvec4f plane(0, 0, 1, 10);
qvec3f point(100, 100, 100);
EXPECT_FLOAT_EQ(90, GLM_DistAbovePlane(plane, point));
}
TEST(mathlib, InterpolateNormalsDegenerate)
{
EXPECT_FALSE(GLM_InterpolateNormal({}, std::vector<qvec3f>{}, qvec3f(0, 0, 0)).first);
EXPECT_FALSE(GLM_InterpolateNormal({qvec3f(0, 0, 0)}, {qvec3f(0, 0, 1)}, qvec3f(0, 0, 0)).first);
EXPECT_FALSE(
GLM_InterpolateNormal({qvec3f(0, 0, 0), qvec3f(10, 0, 0)}, {qvec3f(0, 0, 1), qvec3f(0, 0, 1)}, qvec3f(0, 0, 0))
.first);
}
TEST(mathlib, InterpolateNormals)
{
// This test relies on the way GLM_InterpolateNormal is implemented
// o--o--o
// | / / |
// |// |
// o-----o
const vector<qvec3f> poly{{0, 0, 0}, {0, 64, 0}, {32, 64, 0}, // colinear
{64, 64, 0}, {64, 0, 0}};
const vector<qvec3f> normals{{1, 0, 0}, {0, 1, 0}, {0, 0, 1}, // colinear
{0, 0, 0}, {-1, 0, 0}};
// First try all the known points
for (int i = 0; i < poly.size(); i++) {
const auto res = GLM_InterpolateNormal(poly, normals, poly.at(i));
EXPECT_EQ(true, res.first);
EXPECT_TRUE(qv::epsilonEqual(normals.at(i), res.second, static_cast<float>(POINT_EQUAL_EPSILON)));
}
{
const qvec3f firstTriCentroid = (poly[0] + poly[1] + poly[2]) / 3.0f;
const auto res = GLM_InterpolateNormal(poly, normals, firstTriCentroid);
EXPECT_EQ(true, res.first);
EXPECT_TRUE(qv::epsilonEqual(qvec3f(1 / 3.0f), res.second, static_cast<float>(POINT_EQUAL_EPSILON)));
}
// Outside poly
EXPECT_FALSE(GLM_InterpolateNormal(poly, normals, qvec3f(-0.1, 0, 0)).first);
}
static bool polysEqual(const vector<qvec3f> &p1, const vector<qvec3f> &p2)
{
if (p1.size() != p2.size())
return false;
for (int i = 0; i < p1.size(); i++) {
if (!qv::epsilonEqual(p1[i], p2[i], static_cast<float>(POINT_EQUAL_EPSILON)))
return false;
}
return true;
}
TEST(mathlib, ClipPoly1)
{
const vector<qvec3f> poly{{0, 0, 0}, {0, 64, 0}, {64, 64, 0}, {64, 0, 0}};
const vector<qvec3f> frontRes{{0, 0, 0}, {0, 64, 0}, {32, 64, 0}, {32, 0, 0}};
const vector<qvec3f> backRes{{32, 64, 0}, {64, 64, 0}, {64, 0, 0}, {32, 0, 0}};
auto clipRes = GLM_ClipPoly(poly, qvec4f(-1, 0, 0, -32));
EXPECT_TRUE(polysEqual(frontRes, clipRes.first));
EXPECT_TRUE(polysEqual(backRes, clipRes.second));
}
TEST(mathlib, ShrinkPoly1)
{
const vector<qvec3f> poly{{0, 0, 0}, {0, 64, 0}, {64, 64, 0}, {64, 0, 0}};
const vector<qvec3f> shrunkPoly{{1, 1, 0}, {1, 63, 0}, {63, 63, 0}, {63, 1, 0}};
const auto actualShrunk = GLM_ShrinkPoly(poly, 1.0f);
EXPECT_TRUE(polysEqual(shrunkPoly, actualShrunk));
}
TEST(mathlib, ShrinkPoly2)
{
const vector<qvec3f> poly{{0, 0, 0}, {64, 64, 0}, {64, 0, 0}};
const vector<qvec3f> shrunkPoly{
{1.0f + sqrtf(2.0f), 1.0f, 0.0f},
{63.0f, 63.0f - sqrtf(2.0f), 0.0f},
{63, 1, 0},
};
const auto actualShrunk = GLM_ShrinkPoly(poly, 1.0f);
EXPECT_TRUE(polysEqual(shrunkPoly, actualShrunk));
}
TEST(mathlib, SignedDegreesBetweenUnitVectors)
{
const qvec3f up{0, 0, 1};
const qvec3f fwd{0, 1, 0};
const qvec3f right{1, 0, 0};
EXPECT_FLOAT_EQ(-90, SignedDegreesBetweenUnitVectors(right, fwd, up));
EXPECT_FLOAT_EQ(90, SignedDegreesBetweenUnitVectors(fwd, right, up));
EXPECT_FLOAT_EQ(0, SignedDegreesBetweenUnitVectors(right, right, up));
}
TEST(mathlib, ConcavityTest_concave)
{
const qvec3f face1center{0, 0, 10};
const qvec3f face2center{10, 0, 200};
const qvec3f face1normal{0, 0, 1};
const qvec3f face2normal{-1, 0, 0};
EXPECT_EQ(concavity_t::Concave, FacePairConcavity(face1center, face1normal, face2center, face2normal));
}
TEST(mathlib, ConcavityTest_concave2)
{
const qvec3f face1center{0, 0, 10};
const qvec3f face2center{-10, 0, 200};
const qvec3f face1normal{0, 0, 1};
const qvec3f face2normal{1, 0, 0};
EXPECT_EQ(concavity_t::Concave, FacePairConcavity(face1center, face1normal, face2center, face2normal));
}
TEST(mathlib, ConcavityTest_convex)
{
const qvec3f face1center{0, 0, 10};
const qvec3f face2center{10, 0, 5};
const qvec3f face1normal{0, 0, 1};
const qvec3f face2normal{1, 0, 0};
EXPECT_EQ(concavity_t::Convex, FacePairConcavity(face1center, face1normal, face2center, face2normal));
}
TEST(mathlib, ConcavityTest_convex2)
{
const qvec3f face1center{0, 0, 10};
const qvec3f face2center{-10, 0, 5};
const qvec3f face1normal{0, 0, 1};
const qvec3f face2normal{-1, 0, 0};
EXPECT_EQ(concavity_t::Convex, FacePairConcavity(face1center, face1normal, face2center, face2normal));
}
TEST(mathlib, ConcavityTest_coplanar)
{
const qvec3f face1center{0, 0, 10};
const qvec3f face2center{100, 100, 10};
const qvec3f face1normal{0, 0, 1};
const qvec3f face2normal{0, 0, 1};
EXPECT_EQ(concavity_t::Coplanar, FacePairConcavity(face1center, face1normal, face2center, face2normal));
}
static const float MANGLE_EPSILON = 0.1f;
TEST(light, vec_from_mangle)
{
EXPECT_TRUE(qv::epsilonEqual(qvec3f(1, 0, 0), vec_from_mangle(qvec3f(0, 0, 0)), MANGLE_EPSILON));
EXPECT_TRUE(qv::epsilonEqual(qvec3f(-1, 0, 0), vec_from_mangle(qvec3f(180, 0, 0)), MANGLE_EPSILON));
EXPECT_TRUE(qv::epsilonEqual(qvec3f(0, 0, 1), vec_from_mangle(qvec3f(0, 90, 0)), MANGLE_EPSILON));
EXPECT_TRUE(qv::epsilonEqual(qvec3f(0, 0, -1), vec_from_mangle(qvec3f(0, -90, 0)), MANGLE_EPSILON));
}
TEST(light, mangle_from_vec)
{
EXPECT_TRUE(qv::epsilonEqual(qvec3f(0, 0, 0), mangle_from_vec(qvec3f(1, 0, 0)), MANGLE_EPSILON));
EXPECT_TRUE(qv::epsilonEqual(qvec3f(180, 0, 0), mangle_from_vec(qvec3f(-1, 0, 0)), MANGLE_EPSILON));
EXPECT_TRUE(qv::epsilonEqual(qvec3f(0, 90, 0), mangle_from_vec(qvec3f(0, 0, 1)), MANGLE_EPSILON));
EXPECT_TRUE(qv::epsilonEqual(qvec3f(0, -90, 0), mangle_from_vec(qvec3f(0, 0, -1)), MANGLE_EPSILON));
for (int yaw = -179; yaw <= 179; yaw++) {
for (int pitch = -89; pitch <= 89; pitch++) {
const qvec3f origMangle = qvec3f(yaw, pitch, 0);
const qvec3f vec = vec_from_mangle(origMangle);
const qvec3f roundtrip = mangle_from_vec(vec);
EXPECT_TRUE(qv::epsilonEqual(origMangle, roundtrip, MANGLE_EPSILON));
}
}
}
TEST(mathlib, bilinearInterpolate)
{
const qvec4f v1(0, 1, 2, 3);
const qvec4f v2(4, 5, 6, 7);
const qvec4f v3(1, 1, 1, 1);
const qvec4f v4(2, 2, 2, 2);
EXPECT_EQ(v1, bilinearInterpolate(v1, v2, v3, v4, 0.0f, 0.0f));
EXPECT_EQ(v2, bilinearInterpolate(v1, v2, v3, v4, 1.0f, 0.0f));
EXPECT_EQ(v3, bilinearInterpolate(v1, v2, v3, v4, 0.0f, 1.0f));
EXPECT_EQ(v4, bilinearInterpolate(v1, v2, v3, v4, 1.0f, 1.0f));
EXPECT_EQ(qvec4f(1.5, 1.5, 1.5, 1.5), bilinearInterpolate(v1, v2, v3, v4, 0.5f, 1.0f));
EXPECT_EQ(qvec4f(2, 3, 4, 5), bilinearInterpolate(v1, v2, v3, v4, 0.5f, 0.0f));
EXPECT_EQ(qvec4f(1.75, 2.25, 2.75, 3.25), bilinearInterpolate(v1, v2, v3, v4, 0.5f, 0.5f));
}
TEST(mathlib, bilinearWeightsAndCoords)
{
const auto res = bilinearWeightsAndCoords(qvec2f(0.5, 0.25), qvec2i(2, 2));
qvec2f sum{};
for (int i = 0; i < 4; i++) {
const float weight = res[i].second;
const qvec2i intPos = res[i].first;
sum += qvec2f(intPos) * weight;
}
EXPECT_EQ(qvec2f(0.5, 0.25), sum);
}
TEST(mathlib, bilinearWeightsAndCoords2)
{
const auto res = bilinearWeightsAndCoords(qvec2f(1.5, 0.5), qvec2i(2, 2));
qvec2f sum{};
for (int i = 0; i < 4; i++) {
const float weight = res[i].second;
const qvec2i intPos = res[i].first;
sum += qvec2f(intPos) * weight;
}
EXPECT_EQ(qvec2f(1.0, 0.5), sum);
}
TEST(mathlib, pointsAlongLine)
{
const auto res = PointsAlongLine(qvec3f(1, 0, 0), qvec3f(3.5, 0, 0), 1.5f);
ASSERT_EQ(2, res.size());
ASSERT_TRUE(qv::epsilonEqual(qvec3f(1, 0, 0), res[0], static_cast<float>(POINT_EQUAL_EPSILON)));
ASSERT_TRUE(qv::epsilonEqual(qvec3f(2.5, 0, 0), res[1], static_cast<float>(POINT_EQUAL_EPSILON)));
}
// FIXME: this is failing
#if 0
TEST(mathlib, RandomPointInPoly) {
const vector<qvec3f> poly {
{ 0,0,0 },
{ 0,32,0 }, // colinear point
{ 0,64,0 },
{ 64,64,0 },
{ 64,0,0 }
};
const auto edgeplanes = GLM_MakeInwardFacingEdgePlanes(poly);
qvec3f min(FLT_MAX);
qvec3f max(-FLT_MAX);
qvec3f avg{};
const auto randomstate = GLM_PolyRandomPoint_Setup(poly);
const int N=100;
for (int i=0; i<N; i++) {
const qvec3f point = GLM_PolyRandomPoint(randomstate, Random(), Random(), Random());
ASSERT_TRUE(GLM_EdgePlanes_PointInside(edgeplanes, point));
//std::cout << "point: " << qv::to_string(point) << std::endl;
min = qv::min(min, point);
max = qv::max(max, point);
avg += point;
}
avg /= N;
ASSERT_LT(min[0], 4);
ASSERT_LT(min[1], 4);
ASSERT_EQ(min[2], 0);
ASSERT_GT(max[0], 60);
ASSERT_GT(max[1], 60);
ASSERT_EQ(max[2], 0);
ASSERT_LT(qv::length(avg - qvec3f(32, 32, 0)), 4);
}
#endif
TEST(mathlib, FractionOfLine)
{
ASSERT_FLOAT_EQ(0, FractionOfLine(qvec3f(0, 0, 0), qvec3f(1, 1, 1), qvec3f(0, 0, 0)));
ASSERT_FLOAT_EQ(0.5, FractionOfLine(qvec3f(0, 0, 0), qvec3f(1, 1, 1), qvec3f(0.5, 0.5, 0.5)));
ASSERT_FLOAT_EQ(1, FractionOfLine(qvec3f(0, 0, 0), qvec3f(1, 1, 1), qvec3f(1, 1, 1)));
ASSERT_FLOAT_EQ(2, FractionOfLine(qvec3f(0, 0, 0), qvec3f(1, 1, 1), qvec3f(2, 2, 2)));
ASSERT_FLOAT_EQ(-1, FractionOfLine(qvec3f(0, 0, 0), qvec3f(1, 1, 1), qvec3f(-1, -1, -1)));
ASSERT_FLOAT_EQ(0, FractionOfLine(qvec3f(0, 0, 0), qvec3f(0, 0, 0), qvec3f(0, 0, 0)));
}
TEST(mathlib, DistToLine)
{
const float epsilon = 0.001;
ASSERT_TRUE(fabs(0 - DistToLine(qvec3f(0, 0, 0), qvec3f(1, 1, 1), qvec3f(0, 0, 0))) < epsilon);
ASSERT_TRUE(fabs(0 - DistToLine(qvec3f(0, 0, 0), qvec3f(1, 1, 1), qvec3f(0.5, 0.5, 0.5))) < epsilon);
ASSERT_TRUE(fabs(0 - DistToLine(qvec3f(0, 0, 0), qvec3f(1, 1, 1), qvec3f(1, 1, 1))) < epsilon);
ASSERT_TRUE(fabs(0 - DistToLine(qvec3f(0, 0, 0), qvec3f(1, 1, 1), qvec3f(2, 2, 2))) < epsilon);
ASSERT_TRUE(fabs(0 - DistToLine(qvec3f(0, 0, 0), qvec3f(1, 1, 1), qvec3f(-1, -1, -1))) < epsilon);
ASSERT_TRUE(fabs(sqrt(2) / 2 - DistToLine(qvec3f(0, 0, 0), qvec3f(1, 1, 0), qvec3f(0, 1, 0))) < epsilon);
ASSERT_TRUE(fabs(sqrt(2) / 2 - DistToLine(qvec3f(0, 0, 0), qvec3f(1, 1, 0), qvec3f(1, 0, 0))) < epsilon);
ASSERT_TRUE(fabs(0.5 - DistToLine(qvec3f(10, 0, 0), qvec3f(10, 0, 100), qvec3f(9.5, 0, 0))) < epsilon);
}
TEST(mathlib, DistToLineSegment)
{
const float epsilon = 0.001;
ASSERT_TRUE(fabs(0 - DistToLineSegment(qvec3f(0, 0, 0), qvec3f(1, 1, 1), qvec3f(0, 0, 0))) < epsilon);
ASSERT_TRUE(fabs(0 - DistToLineSegment(qvec3f(0, 0, 0), qvec3f(1, 1, 1), qvec3f(0.5, 0.5, 0.5))) < epsilon);
ASSERT_TRUE(fabs(0 - DistToLineSegment(qvec3f(0, 0, 0), qvec3f(1, 1, 1), qvec3f(1, 1, 1))) < epsilon);
ASSERT_TRUE(fabs(sqrt(3) - DistToLineSegment(qvec3f(0, 0, 0), qvec3f(1, 1, 1), qvec3f(2, 2, 2))) < epsilon);
ASSERT_TRUE(fabs(sqrt(3) - DistToLineSegment(qvec3f(0, 0, 0), qvec3f(1, 1, 1), qvec3f(-1, -1, -1))) < epsilon);
ASSERT_TRUE(fabs(sqrt(2) / 2 - DistToLineSegment(qvec3f(0, 0, 0), qvec3f(1, 1, 0), qvec3f(0, 1, 0))) < epsilon);
ASSERT_TRUE(fabs(sqrt(2) / 2 - DistToLineSegment(qvec3f(0, 0, 0), qvec3f(1, 1, 0), qvec3f(1, 0, 0))) < epsilon);
ASSERT_TRUE(fabs(0.5 - DistToLineSegment(qvec3f(10, 0, 0), qvec3f(10, 0, 100), qvec3f(9.5, 0, 0))) < epsilon);
}
TEST(mathlib, linesOverlap_points)
{
ASSERT_TRUE(LinesOverlap({0, 0, 0}, {0, 0, 0}, {0, 0, 0}, {0, 0, 0}));
}
TEST(mathlib, linesOverlap_point_line)
{
ASSERT_TRUE(LinesOverlap({0, 0, 0}, {0, 0, 0}, {0, 0, 0}, {0, 0, 1}));
}
TEST(mathlib, linesOverlap_same)
{
ASSERT_TRUE(LinesOverlap({0, 0, 0}, {0, 0, 1}, {0, 0, 0}, {0, 0, 1}));
}
TEST(mathlib, linesOverlap_same_opposite_dir)
{
ASSERT_TRUE(LinesOverlap({0, 0, 0}, {0, 0, 1}, {0, 0, 1}, {0, 0, 0}));
}
TEST(mathlib, linesOverlap_overlap)
{
ASSERT_TRUE(LinesOverlap({0, 0, 0}, {0, 0, 1}, {0, 0, 0.5}, {0, 0, 1.5}));
}
TEST(mathlib, linesOverlap_overlap_opposite_dir)
{
ASSERT_TRUE(LinesOverlap({0, 0, 0}, {0, 0, 1}, {0, 0, 1.5}, {0, 0, 0.5}));
}
TEST(mathlib, linesOverlap_only_tips_touching)
{
ASSERT_TRUE(LinesOverlap({0, 0, 0}, {0, 0, 1}, {0, 0, 1}, {0, 0, 2}));
}
TEST(mathlib, linesOverlap_non_colinear)
{
ASSERT_FALSE(LinesOverlap({0, 0, 0}, {0, 0, 1}, {5, 0, 0}, {5, 0, 1}));
}
TEST(mathlib, linesOverlap_colinear_not_touching)
{
ASSERT_FALSE(LinesOverlap({0, 0, 0}, {0, 0, 1}, {0, 0, 2}, {0, 0, 3}));
}
// qvec
TEST(mathlib, qvec_expand)
{
const qvec2f test(1, 2);
const qvec4f test2(test);
EXPECT_EQ(1, test2[0]);
EXPECT_EQ(2, test2[1]);
EXPECT_EQ(0, test2[2]);
EXPECT_EQ(0, test2[3]);
}
TEST(mathlib, qvec_contract)
{
const qvec4f test(1, 2, 0, 0);
const qvec2f test2(test);
EXPECT_EQ(1, test2[0]);
EXPECT_EQ(2, test2[1]);
}
TEST(mathlib, qvec_copy)
{
const qvec2f test(1, 2);
const qvec2f test2(test);
EXPECT_EQ(1, test2[0]);
EXPECT_EQ(2, test2[1]);
}
TEST(mathlib, qvec_constructor_init)
{
const qvec2f test{};
EXPECT_EQ(0, test[0]);
EXPECT_EQ(0, test[1]);
}
TEST(mathlib, qvec_constructor_1)
{
const qvec2f test(42);
EXPECT_EQ(42, test[0]);
EXPECT_EQ(42, test[1]);
}
TEST(mathlib, qvec_constructor_fewer)
{
const qvec4f test(1, 2, 3);
EXPECT_EQ(1, test[0]);
EXPECT_EQ(2, test[1]);
EXPECT_EQ(3, test[2]);
EXPECT_EQ(0, test[3]);
}
TEST(mathlib, qvec_constructor_extra)
{
const qvec2f test(1, 2, 3);
EXPECT_EQ(1, test[0]);
EXPECT_EQ(2, test[1]);
}
// aabb3f
TEST(mathlib, aabb_basic)
{
const aabb3f b1(qvec3f(1, 1, 1), qvec3f(10, 10, 10));
EXPECT_EQ(qvec3f(1, 1, 1), b1.mins());
EXPECT_EQ(qvec3f(10, 10, 10), b1.maxs());
EXPECT_EQ(qvec3f(9, 9, 9), b1.size());
}
TEST(mathlib, aabb_grow)
{
const aabb3f b1(qvec3f(1, 1, 1), qvec3f(10, 10, 10));
EXPECT_EQ(aabb3f(qvec3f(0, 0, 0), qvec3f(11, 11, 11)), b1.grow(qvec3f(1, 1, 1)));
}
TEST(mathlib, aabb_unionwith)
{
const aabb3f b1(qvec3f(1, 1, 1), qvec3f(10, 10, 10));
const aabb3f b2(qvec3f(11, 11, 11), qvec3f(12, 12, 12));
EXPECT_EQ(aabb3f(qvec3f(1, 1, 1), qvec3f(12, 12, 12)), b1.unionWith(b2));
}
TEST(mathlib, aabb_expand)
{
const aabb3f b1(qvec3f(1, 1, 1), qvec3f(10, 10, 10));
EXPECT_EQ(b1, b1.expand(qvec3f(1, 1, 1)));
EXPECT_EQ(b1, b1.expand(qvec3f(5, 5, 5)));
EXPECT_EQ(b1, b1.expand(qvec3f(10, 10, 10)));
const aabb3f b2(qvec3f(1, 1, 1), qvec3f(100, 10, 10));
EXPECT_EQ(b2, b1.expand(qvec3f(100, 10, 10)));
const aabb3f b3(qvec3f(0, 1, 1), qvec3f(10, 10, 10));
EXPECT_EQ(b3, b1.expand(qvec3f(0, 1, 1)));
}
TEST(mathlib, aabb_disjoint)
{
const aabb3f b1(qvec3f(1, 1, 1), qvec3f(10, 10, 10));
const aabb3f yes1(qvec3f(-1, -1, -1), qvec3f(0, 0, 0));
const aabb3f yes2(qvec3f(11, 1, 1), qvec3f(12, 10, 10));
const aabb3f no1(qvec3f(-1, -1, -1), qvec3f(1, 1, 1));
const aabb3f no2(qvec3f(10, 10, 10), qvec3f(10.5, 10.5, 10.5));
const aabb3f no3(qvec3f(5, 5, 5), qvec3f(100, 6, 6));
EXPECT_TRUE(b1.disjoint(yes1));
EXPECT_TRUE(b1.disjoint(yes2));
EXPECT_FALSE(b1.disjoint(no1));
EXPECT_FALSE(b1.disjoint(no2));
EXPECT_FALSE(b1.disjoint(no3));
EXPECT_FALSE(b1.intersectWith(yes1));
EXPECT_FALSE(b1.intersectWith(yes2));
// these intersections are single points
EXPECT_EQ(aabb3f::intersection_t(aabb3f(qvec3f(1, 1, 1), qvec3f(1, 1, 1))), b1.intersectWith(no1));
EXPECT_EQ(aabb3f::intersection_t(aabb3f(qvec3f(10, 10, 10), qvec3f(10, 10, 10))), b1.intersectWith(no2));
// an intersection with a volume
EXPECT_EQ(aabb3f::intersection_t(aabb3f(qvec3f(5, 5, 5), qvec3f(10, 6, 6))), b1.intersectWith(no3));
}
TEST(mathlib, aabb_contains)
{
const aabb3f b1(qvec3f(1, 1, 1), qvec3f(10, 10, 10));
const aabb3f yes1(qvec3f(1, 1, 1), qvec3f(2, 2, 2));
const aabb3f yes2(qvec3f(9, 9, 9), qvec3f(10, 10, 10));
const aabb3f no1(qvec3f(-1, 1, 1), qvec3f(2, 2, 2));
const aabb3f no2(qvec3f(9, 9, 9), qvec3f(10.5, 10, 10));
EXPECT_TRUE(b1.contains(yes1));
EXPECT_TRUE(b1.contains(yes2));
EXPECT_FALSE(b1.contains(no1));
EXPECT_FALSE(b1.contains(no2));
}
TEST(mathlib, aabb_containsPoint)
{
const aabb3f b1(qvec3f(1, 1, 1), qvec3f(10, 10, 10));
const qvec3f yes1(1, 1, 1);
const qvec3f yes2(2, 2, 2);
const qvec3f yes3(10, 10, 10);
const qvec3f no1(0, 0, 0);
const qvec3f no2(1, 1, 0);
const qvec3f no3(10.1, 10.1, 10.1);
EXPECT_TRUE(b1.containsPoint(yes1));
EXPECT_TRUE(b1.containsPoint(yes2));
EXPECT_TRUE(b1.containsPoint(yes3));
EXPECT_FALSE(b1.containsPoint(no1));
EXPECT_FALSE(b1.containsPoint(no2));
EXPECT_FALSE(b1.containsPoint(no3));
}
TEST(mathlib, aabb_create_invalid)
{
const aabb3f b1(qvec3f(1, 1, 1), qvec3f(-1, -1, -1));
const aabb3f fixed(qvec3f(1, 1, 1), qvec3f(1, 1, 1));
EXPECT_EQ(fixed, b1);
EXPECT_EQ(qvec3f(0, 0, 0), b1.size());
}
TEST(qvec, matrix2x2inv)
{
std::mt19937 engine(0);
std::uniform_real_distribution<float> dis(-4096, 4096);
qmat2x2f randMat;
for (int i = 0; i < 2; i++)
for (int j = 0; j < 2; j++)
randMat.at(i, j) = dis(engine);
qmat2x2f randInv = qv::inverse(randMat);
ASSERT_FALSE(std::isnan(randInv.at(0, 0)));
qmat2x2f prod = randMat * randInv;
for (int i = 0; i < 2; i++) {
for (int j = 0; j < 2; j++) {
float exp = (i == j) ? 1.0f : 0.0f;
ASSERT_TRUE(fabs(exp - prod.at(i, j)) < 0.001);
}
}
// check non-invertible gives nan
qmat2x2f nanMat = qv::inverse(qmat2x2f(0));
ASSERT_TRUE(std::isnan(nanMat.at(0, 0)));
}
TEST(qvec, matrix4x4inv)
{
std::mt19937 engine(0);
std::uniform_real_distribution<float> dis(-4096, 4096);
qmat4x4f randMat;
for (int i = 0; i < 4; i++)
for (int j = 0; j < 4; j++)
randMat.at(i, j) = dis(engine);
qmat4x4f randInv = qv::inverse(randMat);
ASSERT_FALSE(std::isnan(randInv.at(0, 0)));
qmat4x4f prod = randMat * randInv;
for (int i = 0; i < 4; i++) {
for (int j = 0; j < 4; j++) {
float exp = (i == j) ? 1.0f : 0.0f;
ASSERT_TRUE(fabs(exp - prod.at(i, j)) < 0.001);
}
}
// check non-invertible gives nan
qmat4x4f nanMat = qv::inverse(qmat4x4f(0));
ASSERT_TRUE(std::isnan(nanMat.at(0, 0)));
}
TEST(trace, clamp_texcoord_small)
{
// positive
EXPECT_EQ(0, clamp_texcoord(0.0f, 2));
EXPECT_EQ(0, clamp_texcoord(0.5f, 2));
EXPECT_EQ(1, clamp_texcoord(1.0f, 2));
EXPECT_EQ(1, clamp_texcoord(1.5f, 2));
EXPECT_EQ(0, clamp_texcoord(2.0f, 2));
EXPECT_EQ(0, clamp_texcoord(2.5f, 2));
// negative
EXPECT_EQ(1, clamp_texcoord(-0.5f, 2));
EXPECT_EQ(1, clamp_texcoord(-1.0f, 2));
EXPECT_EQ(0, clamp_texcoord(-1.5f, 2));
EXPECT_EQ(0, clamp_texcoord(-2.0f, 2));
EXPECT_EQ(1, clamp_texcoord(-2.5f, 2));
}
TEST(trace, clamp_texcoord)
{
// positive
EXPECT_EQ(0, clamp_texcoord(0.0f, 128));
EXPECT_EQ(64, clamp_texcoord(64.0f, 128));
EXPECT_EQ(64, clamp_texcoord(64.5f, 128));
EXPECT_EQ(127, clamp_texcoord(127.0f, 128));
EXPECT_EQ(0, clamp_texcoord(128.0f, 128));
EXPECT_EQ(1, clamp_texcoord(129.0f, 128));
// negative
EXPECT_EQ(127, clamp_texcoord(-0.5f, 128));
EXPECT_EQ(127, clamp_texcoord(-1.0f, 128));
EXPECT_EQ(1, clamp_texcoord(-127.0f, 128));
EXPECT_EQ(0, clamp_texcoord(-127.5f, 128));
EXPECT_EQ(0, clamp_texcoord(-128.0f, 128));
EXPECT_EQ(127, clamp_texcoord(-129.0f, 128));
}
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