111 lines
2.8 KiB
C
111 lines
2.8 KiB
C
#include <stdbool.h>
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#include <stdio.h>
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#include "intersections.h"
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#include "runner.h"
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static bool intersections_test_0(const char ** scenario)
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{
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*scenario = "An intersection encapsulates t and object";
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struct sphere s = sphere();
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struct intersection i = intersection(3.5f, &s);
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return
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float_equal(i.t, 3.5f) &&
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i.object == &s;
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}
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static bool intersections_test_1(const char ** scenario)
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{
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*scenario = "Aggregating intersections2";
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struct sphere s = sphere();
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struct intersection i1 = intersection(1.0f, &s);
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struct intersection i2 = intersection(2.0f, &s);
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struct intersections2 xs = intersections2(i1, i2);
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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, 2.0f);
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}
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static bool intersections_test_2(const char ** scenario)
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{
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*scenario = "The hit, when all intersections2 have positive t";
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struct sphere s = sphere();
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struct intersection i1 = intersection(1.0f, &s);
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struct intersection i2 = intersection(2.0f, &s);
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struct intersections2 xs = intersections2(i2, i1);
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struct intersection * i = hit((struct intersections *)&xs);
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return
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i != NULL &&
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i->t == i1.t &&
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i->object == i1.object;
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}
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static bool intersections_test_3(const char ** scenario)
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{
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*scenario = "The hit, when some intersections2 have negative t";
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struct sphere s = sphere();
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struct intersection i1 = intersection(-1.0f, &s);
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struct intersection i2 = intersection( 1.0f, &s);
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struct intersections2 xs = intersections2(i2, i1);
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struct intersection * i = hit((struct intersections *)&xs);
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return
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i != NULL &&
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i->t == i2.t &&
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i->object == i2.object;
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}
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static bool intersections_test_4(const char ** scenario)
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{
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*scenario = "The hit, when all intersections2 have negative t";
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struct sphere s = sphere();
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struct intersection i1 = intersection(-2.0f, &s);
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struct intersection i2 = intersection(-1.0f, &s);
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struct intersections2 xs = intersections2(i2, i1);
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struct intersection * i = hit((struct intersections *)&xs);
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return i == NULL;
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}
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static bool intersections_test_5(const char ** scenario)
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{
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*scenario = "The hit is always the lowest nonnegative intersection";
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struct sphere s = sphere();
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struct intersection i1 = intersection( 5.0f, &s);
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struct intersection i2 = intersection( 7.0f, &s);
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struct intersection i3 = intersection(-3.0f, &s);
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struct intersection i4 = intersection( 2.0f, &s);
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struct intersections4 xs = intersections4(i1, i2, i3, i4);
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struct intersection * i = hit((struct intersections *)&xs);
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return
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i != NULL &&
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i->t == i4.t &&
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i->object == i4.object;
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}
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test_t intersections_tests[] = {
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intersections_test_0,
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intersections_test_1,
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intersections_test_2,
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intersections_test_3,
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intersections_test_4,
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intersections_test_5,
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};
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RUNNER(intersections_tests);
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