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bugfix intersection ray/plane, added related tests

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This commit is contained in:
Stefan Maass
2019-09-14 23:38:44 +02:00
parent 7c07544b34
commit e7d51a3838
2 changed files with 40 additions and 3 deletions
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34
test/gtx/gtx_intersect.cpp
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@@ -3,6 +3,39 @@
#include <glm/gtc/epsilon.hpp>
#include <glm/gtx/intersect.hpp>
int test_intersectRayPlane()
{
int Error = 0;
glm::vec3 const PlaneOrigin(0, 0, 1);
glm::vec3 const PlaneNormal(0, 0, -1);
glm::vec3 const RayOrigin(0, 0, 0);
glm::vec3 const RayDir(0, 0, 1);
// check that inversion of the plane normal has no effect
{
float Distance = 0;
bool const Result = glm::intersectRayPlane(RayOrigin, RayDir, PlaneOrigin, PlaneNormal, Distance);
Error += glm::abs(Distance - 1.f) <= std::numeric_limits<float>::epsilon() ? 0 : 1;
Error += Result ? 0 : 1;
}
{
float Distance = 0;
bool const Result = glm::intersectRayPlane(RayOrigin, RayDir, PlaneOrigin, -1.f * PlaneNormal, Distance);
Error += glm::abs(Distance - 1.f) <= std::numeric_limits<float>::epsilon() ? 0 : 1;
Error += Result ? 0 : 1;
}
// check if plane is before of behind the ray origin
{
float Distance = 9.9999f; // value should not be changed
bool const Result = glm::intersectRayPlane(RayOrigin, RayDir, -1.f * PlaneOrigin, PlaneNormal, Distance);
Error += glm::abs(Distance - 9.9999f) <= std::numeric_limits<float>::epsilon() ? 0 : 1;
Error += Result ? 1 : 0; // there is no intersection in front of the ray origin, only behind
}
return Error;
}
int test_intersectRayTriangle()
{
int Error = 0;
@@ -47,6 +80,7 @@ int main()
{
int Error = 0;
Error += test_intersectRayPlane();
Error += test_intersectRayTriangle();
Error += test_intersectLineTriangle();