aosp12/external/skia/docs/examples/Point_setLength_2.cpp

24 lines
865 B
C++

// Copyright 2019 Google LLC.
// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
#include "tools/fiddle/examples.h"
// HASH=3cc0662b6fbbee1fe3442a0acfece22c
REG_FIDDLE(Point_setLength_2, 256, 160, false, 0) {
void draw(SkCanvas* canvas) {
SkPaint paint;
paint.setAntiAlias(true);
const SkPoint points[] = { { 60, -110 }, { 90, 10 }, { 120, -110 }, { 180, -50 } };
const SkPoint origin = {0, 0};
canvas->translate(30, 140);
for (auto point : points) {
paint.setStrokeWidth(1);
paint.setColor(SK_ColorBLACK);
canvas->drawLine(origin, point, paint);
SkVector normal;
normal.setLength(point.fX, point.fY, 100);
paint.setStrokeWidth(10);
paint.setColor(0x3fbf4512);
canvas->drawLine(origin, normal, paint);
}
}
} // END FIDDLE