27accef223
Review URL: https://codereview.appspot.com/5576043 git-svn-id: http://skia.googlecode.com/svn/trunk@3087 2bbb7eff-a529-9590-31e7-b0007b416f81
103 lines
2.9 KiB
C++
103 lines
2.9 KiB
C++
#include "CubicIntersection.h"
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#include "Intersection_Tests.h"
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#include "TestUtilities.h"
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const Quadratic quadratics[] = {
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{{0, 0}, {1, 0}, {1, 1}},
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};
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const size_t quadratics_count = sizeof(quadratics) / sizeof(quadratics[0]);
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int firstCubicCoincidenceTest = 0;
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void CubicCoincidence_Test() {
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// split large quadratic
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// upscale quadratics to cubics
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// compare original, parts, to see if the are coincident
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for (size_t index = firstCubicCoincidenceTest; index < quadratics_count; ++index) {
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const Quadratic& test = quadratics[index];
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QuadraticPair split;
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chop_at(test, split, 0.5);
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Quadratic midThird;
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sub_divide(test, 1.0/3, 2.0/3, midThird);
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Cubic whole, first, second, mid;
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quad_to_cubic(test, whole);
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quad_to_cubic(split.first(), first);
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quad_to_cubic(split.second(), second);
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quad_to_cubic(midThird, mid);
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if (!implicit_matches(whole, first)) {
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printf("%s-1 %d\n", __FUNCTION__, (int)index);
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}
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if (!implicit_matches(whole, second)) {
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printf("%s-2 %d\n", __FUNCTION__, (int)index);
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}
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if (!implicit_matches(mid, first)) {
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printf("%s-3 %d\n", __FUNCTION__, (int)index);
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}
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if (!implicit_matches(mid, second)) {
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printf("%s-4 %d\n", __FUNCTION__, (int)index);
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}
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if (!implicit_matches(first, second)) {
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printf("%s-5 %d\n", __FUNCTION__, (int)index);
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}
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}
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}
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// pairs of coincident cubics
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// The on curve points of each cubic should be on both parameterized cubics.
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const Cubic cubics[] = {
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{
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{1, -1},
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{.333, 1},
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{-.333, -1},
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{-1, 1}
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},
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{
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{-1, 1},
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{-.333, -1},
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{.333, 1},
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{1, -1}
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},
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{
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{0, 2},
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{0, 1},
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{1, 0},
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{2, 0}
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}, {
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{2, 0},
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{1, 0},
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{0, 1},
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{0, 2}
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},
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{
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{315.74799999999999, 312.83999999999997},
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{312.64400000000001, 318.13400000000001},
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{305.83600000000001, 319.90899999999999},
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{300.54199999999997, 316.80399999999997}
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}, {
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{317.12200000000001, 309.05000000000001},
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{316.11200000000002, 315.10199999999998},
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{310.38499999999999, 319.19},
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{304.33199999999999, 318.17899999999997}
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}
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};
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const size_t cubics_count = sizeof(cubics) / sizeof(cubics[0]);
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int firstCubicParameterizationTest = 0;
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void CubicParameterization_Test() {
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for (size_t index = firstCubicParameterizationTest; index < cubics_count; ++index) {
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for (size_t inner = 0; inner < 4; inner += 3) {
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if (!point_on_parameterized_curve(cubics[index], cubics[index][inner])) {
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printf("%s [%zu,%zu] 1 parameterization failed\n",
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__FUNCTION__, index, inner);
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}
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if (!point_on_parameterized_curve(cubics[index], cubics[index ^ 1][inner])) {
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printf("%s [%zu,%zu] 2 parameterization failed\n",
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__FUNCTION__, index, inner);
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}
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}
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}
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}
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