Point_normalize_2.cpp 903 B

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  1. // Copyright 2019 Google LLC.
  2. // Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
  3. #include "tools/fiddle/examples.h"
  4. // HASH=d84fce292d86c7d9ef37ae2d179c03c7
  5. REG_FIDDLE(Point_normalize_2, 256, 256, false, 0) {
  6. void draw(SkCanvas* canvas) {
  7. SkPaint paint;
  8. paint.setAntiAlias(true);
  9. const SkPoint lines[][2] = { {{ 30, 110 }, { 190, 30 }},
  10. {{ 120, 140 }, { 30, 220 }}};
  11. for (auto line : lines) {
  12. canvas->drawLine(line[0], line[1], paint);
  13. SkVector vector = line[1] - line[0];
  14. if (vector.normalize()) {
  15. SkVector rotate90 = { -vector.fY, vector.fX };
  16. rotate90 *= 10.f;
  17. canvas->drawLine(line[0] - rotate90, line[0] + rotate90, paint);
  18. canvas->drawLine(line[1] - rotate90, line[1] + rotate90, paint);
  19. }
  20. }
  21. }
  22. } // END FIDDLE