154 lines
3.6 KiB
C
154 lines
3.6 KiB
C
#include <stdbool.h>
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#include <stdio.h>
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#include "rays.h"
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#include "spheres.h"
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#include "intersections.h"
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#include "runner.h"
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#include "matrices.h"
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#include "transformations.h"
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static bool spheres_test_0(const char ** scenario)
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{
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*scenario = "A ray intersects a sphere at two points";
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struct ray r = ray(point(0.0f, 0.0f, -5.0f), vector(0.0f, 0.0f, 1.0f));
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struct sphere s = sphere();
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struct intersections2 xs = intersect(&s, r);
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return
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xs.count == 2 &&
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float_equal(xs.i[0].t, 4.0f) &&
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float_equal(xs.i[1].t, 6.0f);
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}
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static bool spheres_test_1(const char ** scenario)
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{
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*scenario = "A ray intersects a sphere at a tangent";
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struct ray r = ray(point(0.0f, 1.0f, -5.0f), vector(0.0f, 0.0f, 1.0f));
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struct sphere s = sphere();
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struct intersections2 xs = intersect(&s, r);
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return
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xs.count == 2 &&
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float_equal(xs.i[0].t, 5.0f) &&
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float_equal(xs.i[1].t, 5.0f);
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}
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static bool spheres_test_2(const char ** scenario)
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{
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*scenario = "A ray misses a sphere";
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struct ray r = ray(point(0.0f, 2.0f, -5.0f), vector(0.0f, 0.0f, 1.0f));
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struct sphere s = sphere();
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struct intersections2 xs = intersect(&s, r);
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return xs.count == 0;
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}
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static bool spheres_test_3(const char ** scenario)
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{
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*scenario = "A ray originates in a sphere";
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struct ray r = ray(point(0.0f, 0.0f, 0.0f), vector(0.0f, 0.0f, 1.0f));
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struct sphere s = sphere();
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struct intersections2 xs = intersect(&s, r);
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return
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xs.count == 2 &&
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float_equal(xs.i[0].t, -1.0f) &&
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float_equal(xs.i[1].t, 1.0f);
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}
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static bool spheres_test_4(const char ** scenario)
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{
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*scenario = "A sphere is behind a ray";
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struct ray r = ray(point(0.0f, 0.0f, 5.0f), vector(0.0f, 0.0f, 1.0f));
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struct sphere s = sphere();
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struct intersections2 xs = intersect(&s, r);
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return
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xs.count == 2 &&
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float_equal(xs.i[0].t, -6.0f) &&
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float_equal(xs.i[1].t, -4.0f);
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}
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static bool spheres_test_5(const char ** scenario)
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{
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*scenario = "Intersect sets the object on the intersection";
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struct ray r = ray(point(0.0f, 0.0f, -5.0f), vector(0.0f, 0.0f, 1.0f));
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struct sphere s = sphere();
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struct intersections2 xs = intersect(&s, r);
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return
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xs.count == 2 &&
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xs.i[0].object == &s &&
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xs.i[1].object == &s;
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}
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static bool spheres_test_6(const char ** scenario)
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{
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*scenario = "A sphere's default transformation";
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struct sphere s = sphere();
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struct mat4x4 identity = mat4x4_identity();
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return mat4x4_equal(&s.transform, &identity);
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}
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static bool spheres_test_7(const char ** scenario)
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{
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*scenario = "Changing a sphere's transformation";
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struct sphere s = sphere();
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struct mat4x4 t = translation(2.0f, 3.0f, 4.0f);
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s.transform = t;
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return mat4x4_equal(&s.transform, &t);
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}
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static bool spheres_test_8(const char ** scenario)
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{
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*scenario = "Intersecting a scaled sphere with a ray";
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struct ray r = ray(point(0.0f, 0.0f, -5.0f), vector(0.0f, 0.0f, 1.0f));
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struct sphere s = sphere();
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s.transform = scaling(2.0f, 2.0f, 2.0f);
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struct intersections2 xs = intersect(&s, r);
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return
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xs.count == 2 &&
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float_equal(xs.i[0].t, 3.0f) &&
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float_equal(xs.i[1].t, 7.0f);
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}
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static bool spheres_test_9(const char ** scenario)
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{
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*scenario = "Intersecting a translated sphere with a ray";
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struct ray r = ray(point(0.0f, 0.0f, 5.0f), vector(0.0f, 0.0f, 1.0f));
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struct sphere s = sphere();
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s.transform = translation(5.0f, 0.0f, 0.0f);
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struct intersections2 xs = intersect(&s, r);
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return xs.count == 0;
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}
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test_t spheres_tests[] = {
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spheres_test_0,
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spheres_test_1,
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spheres_test_2,
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spheres_test_3,
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spheres_test_4,
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spheres_test_5,
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spheres_test_6,
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spheres_test_7,
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spheres_test_8,
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spheres_test_9,
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};
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RUNNER(spheres_tests);
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