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Unified Diff: tests/PathOpsCubicLineIntersectionTest.cpp

Issue 12880016: Add intersections for path ops (Closed) Base URL: http://skia.googlecode.com/svn/trunk/
Patch Set: Created 7 years, 9 months ago
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Index: tests/PathOpsCubicLineIntersectionTest.cpp
===================================================================
--- tests/PathOpsCubicLineIntersectionTest.cpp (revision 0)
+++ tests/PathOpsCubicLineIntersectionTest.cpp (revision 0)
@@ -0,0 +1,61 @@
+/*
+ * Copyright 2012 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+#include "SkIntersections.h"
+#include "SkPathOpsCubic.h"
+#include "SkPathOpsLine.h"
+#include "SkReduceOrder.h"
+#include "Test.h"
+
+static struct lineCubic {
+ SkDCubic cubic;
+ SkDLine line;
+} lineCubicTests[] = {
+ {{{{1, 2}, {2, 6}, {2, 0}, {1, 0}}}, {{{1, 0}, {1, 2}}}},
+ {{{{0, 0}, {0, 1}, {0, 1}, {1, 1}}}, {{{0, 1}, {1, 0}}}},
+};
+
+static const size_t lineCubicTests_count = sizeof(lineCubicTests) / sizeof(lineCubicTests[0]);
+
+static void CubicLineIntersectionTest(skiatest::Reporter* reporter) {
+ for (size_t index = 0; index < lineCubicTests_count; ++index) {
+ int iIndex = static_cast<int>(index);
+ const SkDCubic& cubic = lineCubicTests[index].cubic;
+ const SkDLine& line = lineCubicTests[index].line;
+ SkReduceOrder reduce1;
+ SkReduceOrder reduce2;
+ int order1 = reduce1.reduce(cubic, SkReduceOrder::kNo_Quadratics,
+ SkReduceOrder::kFill_Style);
+ int order2 = reduce2.reduce(line);
+ if (order1 < 4) {
+ SkDebugf("[%d] cubic order=%d\n", iIndex, order1);
+ REPORTER_ASSERT(reporter, 0);
+ }
+ if (order2 < 2) {
+ SkDebugf("[%d] line order=%d\n", iIndex, order2);
+ REPORTER_ASSERT(reporter, 0);
+ }
+ if (order1 == 4 && order2 == 2) {
+ SkIntersections i;
+ int roots = i.intersect(cubic, line);
+ for (int pt = 0; pt < roots; ++pt) {
+ double tt1 = i[0][pt];
+ SkDPoint xy1 = cubic.xyAtT(tt1);
+ double tt2 = i[1][pt];
+ SkDPoint xy2 = line.xyAtT(tt2);
+ if (!xy1.approximatelyEqual(xy2)) {
+ SkDebugf("%s [%d,%d] x!= t1=%g (%g,%g) t2=%g (%g,%g)\n",
+ __FUNCTION__, iIndex, pt, tt1, xy1.fX, xy1.fY, tt2, xy2.fX, xy2.fY);
+ }
+ REPORTER_ASSERT(reporter, xy1.approximatelyEqual(xy2));
+ }
+ }
+ }
+}
+
+#include "TestClassDef.h"
+DEFINE_TESTCLASS("PathOpsCubicLineIntersection", CubicLineIntersectionTestClass, \
+ CubicLineIntersectionTest)
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