9e49fb63d3
add copyrights everywhere start working on quadratic line segments (for quad intersection) git-svn-id: http://skia.googlecode.com/svn/trunk@5286 2bbb7eff-a529-9590-31e7-b0007b416f81
60 lines
2.1 KiB
C++
60 lines
2.1 KiB
C++
/*
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* Copyright 2012 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "CurveIntersection.h"
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#include "CurveUtilities.h"
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#include "Intersection_Tests.h"
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#include "Intersections.h"
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#include "TestUtilities.h"
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struct lineCubic {
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Cubic cubic;
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_Line line;
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} lineCubicTests[] = {
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{{{0, 0}, {0, 1}, {0, 1}, {1, 1}}, {{0, 1}, {1, 0}}}
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};
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size_t lineCubicTests_count = sizeof(lineCubicTests) / sizeof(lineCubicTests[0]);
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const int firstLineCubicIntersectionTest = 0;
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void LineCubicIntersection_Test() {
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for (size_t index = firstLineCubicIntersectionTest; index < lineCubicTests_count; ++index) {
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const Cubic& cubic = lineCubicTests[index].cubic;
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const _Line& line = lineCubicTests[index].line;
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Cubic reduce1;
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_Line reduce2;
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int order1 = reduceOrder(cubic, reduce1, kReduceOrder_NoQuadraticsAllowed);
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int order2 = reduceOrder(line, reduce2);
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if (order1 < 4) {
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printf("[%d] cubic order=%d\n", (int) index, order1);
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}
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if (order2 < 2) {
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printf("[%d] line order=%d\n", (int) index, order2);
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}
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if (order1 == 4 && order2 == 2) {
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double range1[2], range2[2];
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int roots = intersect(reduce1, reduce2, range1, range2);
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for (int pt = 0; pt < roots; ++pt) {
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double tt1 = range1[pt];
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double tx1, ty1;
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xy_at_t(cubic, tt1, tx1, ty1);
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double tt2 = range2[pt];
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double tx2, ty2;
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xy_at_t(line, tt2, tx2, ty2);
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if (!approximately_equal(tx1, tx2)) {
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printf("%s [%d,%d] x!= t1=%g (%g,%g) t2=%g (%g,%g)\n",
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__FUNCTION__, (int)index, pt, tt1, tx1, ty1, tt2, tx2, ty2);
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}
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if (!approximately_equal(ty1, ty2)) {
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printf("%s [%d,%d] y!= t1=%g (%g,%g) t2=%g (%g,%g)\n",
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__FUNCTION__, (int)index, pt, tt1, tx1, ty1, tt2, tx2, ty2);
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}
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}
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}
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}
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}
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