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 REG_FIDDLE(Point_normalize_2, 256, 256, false, 0) {
draw(SkCanvas * canvas)5 void draw(SkCanvas* canvas) {
6 SkPaint paint;
7 paint.setAntiAlias(true);
8 const SkPoint lines[][2] = { {{ 30, 110 }, { 190, 30 }},
9 {{ 120, 140 }, { 30, 220 }}};
10 for (auto line : lines) {
11 canvas->drawLine(line[0], line[1], paint);
12 SkVector vector = line[1] - line[0];
13 if (vector.normalize()) {
14 SkVector rotate90 = { -vector.fY, vector.fX };
15 rotate90 *= 10.f;
16 canvas->drawLine(line[0] - rotate90, line[0] + rotate90, paint);
17 canvas->drawLine(line[1] - rotate90, line[1] + rotate90, paint);
18 }
19 }
20 }
21 } // END FIDDLE
22