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#include <cxxtest/TestSuite.h>
#include "math/ray.h"
class RayTestSuite : public CxxTest::TestSuite {
public:
// Test Constructors
void test_Ray() {
Math::Ray r;
TS_ASSERT(r.getOrigin() == Math::Vector3d());
TS_ASSERT(r.getDirection() == Math::Vector3d());
Math::Vector3d o(3, 2, 1);
Math::Vector3d d(0, 1, 2);
Math::Ray r2(o, d);
TS_ASSERT(r2.getOrigin() == o);
TS_ASSERT(r2.getDirection() == d);
}
void test_translate() {
Math::Vector3d o(3, 2, 1);
Math::Vector3d d(0, 1, 2);
Math::Ray r(o, d);
r.translate(Math::Vector3d(0.5, 0.2, 0.1));
TS_ASSERT(r.getDirection() == d);
Math::Vector3d o2 = r.getOrigin();
TS_ASSERT_DELTA(o2.x(), 3.5, 0.0001);
TS_ASSERT_DELTA(o2.y(), 2.2, 0.0001);
TS_ASSERT_DELTA(o2.z(), 1.1, 0.0001);
}
// TODO: Add tests for transform, rotate, rotateDirection, intersectAABB
void test_intersectTriangle() {
// A triangle that covers around the origin on the y plane.
const Math::Vector3d v1(0, 0, -20);
const Math::Vector3d v2(0, -10, 20);
const Math::Vector3d v3(0, 10, 20);
// A ray that points along the x axis, should hit the triangle at the origin
Math::Ray r(Math::Vector3d(-9.5, 0, 0.7), Math::Vector3d(1, 0, 0));
Math::Vector3d loc(7, 8, 9); // add values to ensure it's changed
float dist = 99.0f;
bool result = r.intersectTriangle(v1, v2, v3, loc, dist);
// Should hit at the origin
TS_ASSERT(result);
TS_ASSERT_DELTA(dist, 9.5f, 0.0001);
TS_ASSERT_DELTA(loc.x(), 0.0f, 0.0001);
TS_ASSERT_DELTA(loc.y(), 0.0f, 0.0001);
TS_ASSERT_DELTA(loc.z(), 0.7f, 0.0001);
// A ray that points along the x axis in the opposite direction, should never hit the triangle
Math::Ray r2(Math::Vector3d(-1, 0, 0), Math::Vector3d(-1, 0, 0));
result = r2.intersectTriangle(v1, v2, v3, loc, dist);
TS_ASSERT(!result);
}
};
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