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Side by Side Diff: third_party/WebKit/Source/platform/geometry/FloatPolygon.cpp

Issue 2392543003: reflow comments in platform/geometry (Closed)
Patch Set: Created 4 years, 2 months ago
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1 /* 1 /*
2 * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved. 2 * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
3 * 3 *
4 * Redistribution and use in source and binary forms, with or without 4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions 5 * modification, are permitted provided that the following conditions
6 * are met: 6 * are met:
7 * 7 *
8 * 1. Redistributions of source code must retain the above 8 * 1. Redistributions of source code must retain the above
9 * copyright notice, this list of conditions and the following 9 * copyright notice, this list of conditions and the following
10 * disclaimer. 10 * disclaimer.
(...skipping 200 matching lines...) Expand 10 before | Expand all | Expand 10 after
211 211
212 bool FloatPolygon::contains(const FloatPoint& point) const { 212 bool FloatPolygon::contains(const FloatPoint& point) const {
213 if (!m_boundingBox.contains(point)) 213 if (!m_boundingBox.contains(point))
214 return false; 214 return false;
215 return (fillRule() == RULE_NONZERO) ? containsNonZero(point) 215 return (fillRule() == RULE_NONZERO) ? containsNonZero(point)
216 : containsEvenOdd(point); 216 : containsEvenOdd(point);
217 } 217 }
218 218
219 bool VertexPair::intersection(const VertexPair& other, 219 bool VertexPair::intersection(const VertexPair& other,
220 FloatPoint& point) const { 220 FloatPoint& point) const {
221 // See: http://paulbourke.net/geometry/pointlineplane/, "Intersection point of two lines in 2 dimensions" 221 // See: http://paulbourke.net/geometry/pointlineplane/,
222 // "Intersection point of two lines in 2 dimensions"
222 223
223 const FloatSize& thisDelta = vertex2() - vertex1(); 224 const FloatSize& thisDelta = vertex2() - vertex1();
224 const FloatSize& otherDelta = other.vertex2() - other.vertex1(); 225 const FloatSize& otherDelta = other.vertex2() - other.vertex1();
225 float denominator = determinant(thisDelta, otherDelta); 226 float denominator = determinant(thisDelta, otherDelta);
226 if (!denominator) 227 if (!denominator)
227 return false; 228 return false;
228 229
229 // The two line segments: "this" vertex1,vertex2 and "other" vertex1,vertex2, have been defined 230 // The two line segments: "this" vertex1,vertex2 and "other" vertex1,vertex2,
230 // in parametric form. Each point on the line segment is: vertex1 + u * (verte x2 - vertex1), 231 // have been defined in parametric form. Each point on the line segment is:
231 // when 0 <= u <= 1. We're computing the values of u for each line at their in tersection point. 232 // vertex1 + u * (vertex2 - vertex1), when 0 <= u <= 1. We're computing the
233 // values of u for each line at their intersection point.
232 234
233 const FloatSize& vertex1Delta = vertex1() - other.vertex1(); 235 const FloatSize& vertex1Delta = vertex1() - other.vertex1();
234 float uThisLine = determinant(otherDelta, vertex1Delta) / denominator; 236 float uThisLine = determinant(otherDelta, vertex1Delta) / denominator;
235 float uOtherLine = determinant(thisDelta, vertex1Delta) / denominator; 237 float uOtherLine = determinant(thisDelta, vertex1Delta) / denominator;
236 238
237 if (uThisLine < 0 || uOtherLine < 0 || uThisLine > 1 || uOtherLine > 1) 239 if (uThisLine < 0 || uOtherLine < 0 || uThisLine > 1 || uOtherLine > 1)
238 return false; 240 return false;
239 241
240 point = vertex1() + uThisLine * thisDelta; 242 point = vertex1() + uThisLine * thisDelta;
241 return true; 243 return true;
242 } 244 }
243 245
244 } // namespace blink 246 } // namespace blink
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