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Merge pull request #659 from CaptainCarrot/QuatLookAt

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Added a quaternion-based "Look At" function #659
This commit is contained in:
Christophe
2017-07-24 12:05:18 +02:00
committed by GitHub
parent 1b78e2b681 c184671583
commit a61483b34a
3 changed files with 80 additions and 0 deletions
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18
test/gtx/gtx_quaternion.cpp
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@@ -90,6 +90,23 @@ int test_log()
return Error;
}
int test_quat_lookAt()
{
int Error(0);
glm::vec3 eye(0.0f);
glm::vec3 center(1.1f, -2.0f, 3.1416f);
glm::vec3 up = glm::vec3(-0.17f, 7.23f, -1.744f);
glm::quat test_quat = glm::quatLookAt(center - eye, up);
glm::quat test_mat = glm::conjugate(glm::quat_cast(glm::lookAt(eye, center, up)));
Error += static_cast<int>(glm::abs(glm::length(test_quat) - 1.0f) > glm::epsilon<float>());
Error += static_cast<int>(glm::min(glm::length(test_quat + (-test_mat)), glm::length(test_quat + test_mat)) > glm::epsilon<float>());
return Error;
}
int main()
{
int Error = 0;
@@ -98,6 +115,7 @@ int main()
Error += test_rotation();
Error += test_quat_fastMix();
Error += test_quat_shortMix();
Error += test_quat_lookAt();
return Error;
}