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.setNormalize(point.fX, point.fY);
normal *= 100;
paint.setStrokeWidth(10);
paint.setColor(0x3f4512bf);
canvas->drawLine(origin, normal, paint);
}
}
