TEST(SphereRayIntersection, SimpleRay2)
{
shapes::Sphere shape(1.0);
bodies::Body* sphere = new bodies::Sphere(&shape);
sphere->setScale(1.05);
Eigen::Vector3d ray_o(5, 0, 0);
Eigen::Vector3d ray_d(1, 0, 0);
EigenSTL::vector_Vector3d p;
bool intersect = sphere->intersectsRay(ray_o, ray_d, &p);
delete sphere;
EXPECT_FALSE(intersect);
EXPECT_EQ(0, (int)p.size());
}
Intersection Cube::SampleLight( float a, float b, float c ){
glm::vec3 ray_o( 0.f );
glm::vec3 ray_d( 0.f );
a -= .5f;
b -= .5f;
int hit_face( c * 6.f );
switch ( hit_face ) {
case 0:
//--- x+ ---
ray_o = glm::vec3( 1.f, a, b );
ray_d = glm::vec3( -1.f, 0.f, 0.f );
break;
case 1:
//--- x- ---
ray_o = glm::vec3( -1.f, a, b );
ray_d = glm::vec3( 1.f, 0.f, 0.f );
break;
case 2:
//--- y+ ---
ray_o = glm::vec3( a, 1.f, b );
ray_d = glm::vec3( 0.f, -1.f, 0.f );
break;
case 3:
//--- y- ---
ray_o = glm::vec3( a, -1.f, b );
ray_d = glm::vec3( 0.f, 1.f, 0.f );
break;
case 4:
//--- z+ ---
ray_o = glm::vec3( a, b, 1.f );
ray_d = glm::vec3( 0.f, 0.f, -1.f );
break;
case 5:
//--- z- ---
ray_o = glm::vec3( a, b, -1.f );
ray_d = glm::vec3( 0.f, 0.f, 1.f );
break;
}
Ray ray( ray_o, ray_d );
return GetIntersection( ray.GetTransformedCopy( transform.T() ) );
}
Intersection Sphere::SampleLight( float a, float b, float c ){
float phi( PI * a );
float u( cosf( phi ) );
float theta( TWO_PI * b );
float x( sqrt( 1 - u * u ) * cosf( theta ) );
float y( sqrt( 1 - u * u ) * sinf( theta ) );
float z( u );
glm::vec3 ray_o( x * .6f, y * .6f, z * .6f );
glm::vec3 ray_d( -x, -y, -z );
Ray ray( ray_o, ray_d );
return GetIntersection( ray.GetTransformedCopy( transform.T() ) );
}
TEST(SphereRayIntersection, SimpleRay1)
{
shapes::Sphere shape(1.0);
bodies::Body* sphere = new bodies::Sphere(&shape);
sphere->setScale(1.05);
Eigen::Vector3d ray_o(5, 0, 0);
Eigen::Vector3d ray_d(-1, 0, 0);
EigenSTL::vector_Vector3d p;
bool intersect = sphere->intersectsRay(ray_o, ray_d, &p);
delete sphere;
EXPECT_TRUE(intersect);
EXPECT_EQ(2, (int)p.size());
EXPECT_NEAR(p[0].x(), 1.05, 1e-6);
EXPECT_NEAR(p[1].x(), -1.05, 1e-6);
}
TEST(BoxRayIntersection, SimpleRay1)
{
shapes::Box shape(1.0, 1.0, 3.0);
bodies::Body* box = new bodies::Box(&shape);
box->setScale(0.95);
Eigen::Vector3d ray_o(10, 0.449, 0);
Eigen::Vector3d ray_d(-1, 0, 0);
EigenSTL::vector_Vector3d p;
bool intersect = box->intersectsRay(ray_o, ray_d, &p);
// for (unsigned int i = 0; i < p.size() ; ++i)
// printf("intersection at %f, %f, %f\n", p[i].x(), p[i].y(), p[i].z());
delete box;
EXPECT_TRUE(intersect);
}
