120 lines
3.0 KiB
C++
120 lines
3.0 KiB
C++
#include <catch2/catch.hpp>
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#include <Nazara/Math/Vector2.hpp>
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#include <Nazara/Math/Vector3.hpp>
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#include <Nazara/Math/Vector4.hpp>
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SCENARIO("Vector3", "[MATH][VECTOR3]")
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{
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GIVEN("Two same unit vector")
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{
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Nz::Vector3f firstUnit(1.f, 1.f, 1.f);
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Nz::Vector3f secondUnit(Nz::Vector3i(Nz::Vector4i(1, 1, 1, 5)));
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WHEN("We compare them")
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{
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THEN("They are the same")
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{
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REQUIRE(firstUnit == secondUnit);
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}
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}
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WHEN("We test the dot product")
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{
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Nz::Vector3f tmp(-1.f, 0.f, 1.f);
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THEN("These results are expected")
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{
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REQUIRE(firstUnit.AbsDotProduct(tmp) == Approx(2.f));
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REQUIRE(firstUnit.DotProduct(tmp) == Approx(0.f));
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REQUIRE(firstUnit.AngleBetween(tmp) == Nz::DegreeAnglef(90.f));
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REQUIRE(firstUnit.AngleBetween(-firstUnit) == Nz::DegreeAnglef(180.f));
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}
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}
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WHEN("We test the cross product")
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{
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THEN("These results are expected")
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{
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REQUIRE(Nz::Vector3f::CrossProduct(Nz::Vector3f::UnitX(), Nz::Vector3f::UnitY()) == Nz::Vector3f::UnitZ());
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REQUIRE(Nz::Vector3f::CrossProduct(Nz::Vector3f(1.f, 2.f, 3.f), Nz::Vector3f(3.f, 2.f, 1.f)) == Nz::Vector3f(-4.f, 8.f, -4.f));
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}
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}
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WHEN("We ask for distance")
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{
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Nz::Vector3f tmp(-1.f, -5.f, -8.f);
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THEN("These are expected")
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{
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REQUIRE(firstUnit.Distance(tmp) == Approx(11.f));
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REQUIRE(firstUnit.SquaredDistance(tmp) == Approx(121.f));
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REQUIRE(firstUnit.GetSquaredLength() == Approx(3.f));
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REQUIRE(firstUnit.GetLength() == Approx(std::sqrt(3.f)));
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}
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}
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WHEN("We nomalize the vectors")
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{
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float ratio = 0.f;
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THEN("For normal cases should be normal")
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{
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Nz::Vector3f normalized = firstUnit.GetNormal(&ratio);
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REQUIRE(normalized == (Nz::Vector3f::Unit() / std::sqrt(3.f)));
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REQUIRE(ratio == Approx(std::sqrt(3.f)));
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}
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THEN("For null vector")
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{
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Nz::Vector3f zero = Nz::Vector3f::Zero();
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REQUIRE(zero.GetNormal(&ratio) == Nz::Vector3f::Zero());
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REQUIRE(ratio == Approx(0.f));
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}
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}
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WHEN("We try to maximize and minimize")
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{
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Nz::Vector3f maximize(2.f, 1.f, 2.f);
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Nz::Vector3f minimize(1.f, 2.f, 1.f);
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THEN("The minimised and maximised should be (1, 1, 1) and (2, 2, 2)")
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{
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Nz::Vector3f maximized = maximize;
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Nz::Vector3f minimized = minimize;
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REQUIRE(minimized.Minimize(maximized) == Nz::Vector3f::Unit());
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REQUIRE(maximize.Maximize(minimize) == (2.f * Nz::Vector3f::Unit()));
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}
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}
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WHEN("We try to lerp")
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{
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THEN("Compilation should be fine")
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{
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Nz::Vector3f zero = Nz::Vector3f::Zero();
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Nz::Vector3f unit = Nz::Vector3f::Unit();
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REQUIRE(Nz::Vector3f::Lerp(zero, unit, 0.5f) == (Nz::Vector3f::Unit() * 0.5f));
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}
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}
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}
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GIVEN("Two vectors")
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{
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Nz::Vector2f unit = Nz::Vector2f::Unit();
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Nz::Vector3f smaller(-1.f, unit);
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Nz::Vector3f bigger(1.f, unit.x, unit.y);
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WHEN("We combine divisions and multiplications")
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{
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Nz::Vector3f result = smaller / bigger;
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result *= bigger;
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THEN("We should get the identity")
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{
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REQUIRE(result == smaller);
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}
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}
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}
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}
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