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1 /* | 1 /* |
2 * Copyright 2012 Google Inc. | 2 * Copyright 2012 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
| 7 |
| 8 #ifndef SkLineParameters_DEFINED |
| 9 #define SkLineParameters_DEFINED |
| 10 |
7 #include "SkPathOpsCubic.h" | 11 #include "SkPathOpsCubic.h" |
8 #include "SkPathOpsLine.h" | 12 #include "SkPathOpsLine.h" |
9 #include "SkPathOpsQuad.h" | 13 #include "SkPathOpsQuad.h" |
10 | 14 |
11 // Sources | 15 // Sources |
12 // computer-aided design - volume 22 number 9 november 1990 pp 538 - 549 | 16 // computer-aided design - volume 22 number 9 november 1990 pp 538 - 549 |
13 // online at http://cagd.cs.byu.edu/~tom/papers/bezclip.pdf | 17 // online at http://cagd.cs.byu.edu/~tom/papers/bezclip.pdf |
14 | 18 |
15 // This turns a line segment into a parameterized line, of the form | 19 // This turns a line segment into a parameterized line, of the form |
16 // ax + by + c = 0 | 20 // ax + by + c = 0 |
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166 | 170 |
167 double dy() const { | 171 double dy() const { |
168 return -fA; | 172 return -fA; |
169 } | 173 } |
170 | 174 |
171 private: | 175 private: |
172 double fA; | 176 double fA; |
173 double fB; | 177 double fB; |
174 double fC; | 178 double fC; |
175 }; | 179 }; |
| 180 |
| 181 #endif |
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