Function TEST

engine/dlib/src/test/test_intersection.cpp:41–76

using namespace dmVMath;

TEST(dmVMath, CreateFrustum)
{
    dmVMath::Point3 cam_pos = dmVMath::Point3(0.0f, 0.0f, 0);
    dmVMath::Matrix4 view = Matrix4::lookAt(cam_pos, dmVMath::Point3(cam_pos.getX(), cam_pos.getY(), cam_pos.getZ()-1), dmVMath::Vector3(0,1,0)); // eye, lookat, up

    dmVMath::Matrix4 proj = dmVMath::Matrix4::orthographic(0.0f, FRUSTUM_WIDTH, 0.0f, FRUSTUM_HEIGHT, 10.0f, 100.0f);

    dmVMath::Matrix4 view_proj = proj * view;

    dmIntersection::Frustum frustum;
    dmIntersection::CreateFrustumFromMatrix(view_proj, true, 6, frustum);

    float px = FRUSTUM_WIDTH / 2.0f;
    float py = FRUSTUM_HEIGHT / 2.0f;
    float pz = -FRUSTUM_NEAR -(FRUSTUM_FAR - FRUSTUM_NEAR) / 2.0f;

    // Making sure all planes point inwards, and are located at the correct distances

    ASSERT_NEAR(-10.0f, dmIntersection::DistanceToPlane(frustum.m_Planes[0], dmVMath::Point3(-10.0f, py, pz)), 0.001f);
    ASSERT_NEAR( 10.0f, dmIntersection::DistanceToPlane(frustum.m_Planes[0], dmVMath::Point3( 10.0f, py, pz)), 0.001f);

    ASSERT_NEAR(-10.0f, dmIntersection::DistanceToPlane(frustum.m_Planes[1], dmVMath::Point3(110.0f, py, pz)), 0.001f);
    ASSERT_NEAR( 10.0f, dmIntersection::DistanceToPlane(frustum.m_Planes[1], dmVMath::Point3( 90.0f, py, pz)), 0.001f);

    ASSERT_NEAR(-10.0f, dmIntersection::DistanceToPlane(frustum.m_Planes[2], dmVMath::Point3(px, -10.0f, pz)), 0.001f);
    ASSERT_NEAR( 10.0f, dmIntersection::DistanceToPlane(frustum.m_Planes[2], dmVMath::Point3(px,  10.0f, pz)), 0.001f);

    ASSERT_NEAR(-10.0f, dmIntersection::DistanceToPlane(frustum.m_Planes[3], dmVMath::Point3(px, 90.0f, pz)), 0.001f);
    ASSERT_NEAR( 10.0f, dmIntersection::DistanceToPlane(frustum.m_Planes[3], dmVMath::Point3(px, 70.0f, pz)), 0.001f);

    ASSERT_NEAR(-10.0f, dmIntersection::DistanceToPlane(frustum.m_Planes[4], dmVMath::Point3(px, py,   0.0f)), 0.001f);
    ASSERT_NEAR( 10.0f, dmIntersection::DistanceToPlane(frustum.m_Planes[4], dmVMath::Point3(px, py, -20.0f)), 0.001f);

    ASSERT_NEAR(-10.0f, dmIntersection::DistanceToPlane(frustum.m_Planes[5], dmVMath::Point3(px, py, -110.0f)), 0.001f);
    ASSERT_NEAR( 10.0f, dmIntersection::DistanceToPlane(frustum.m_Planes[5], dmVMath::Point3(px, py,  -90.0f)), 0.001f);
}

TEST(dmVMath, TestFrustumSphere)
{