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- // 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=5de2de0f00354e59074a9bb1a42d5a63
- REG_FIDDLE(Miter_Limit, 384, 170, false, 0) {
- void draw(SkCanvas* canvas) {
- SkPoint pts[] = {{ 10, 50 }, { 110, 80 }, { 10, 110 }};
- SkVector v[] = { pts[0] - pts[1], pts[2] - pts[1] };
- SkScalar angle1 = SkScalarATan2(v[0].fY, v[0].fX);
- SkScalar angle2 = SkScalarATan2(v[1].fY, v[1].fX);
- const SkScalar strokeWidth = 20;
- SkScalar miterLimit = 1 / SkScalarSin((angle2 - angle1) / 2);
- SkScalar miterLength = strokeWidth * miterLimit;
- SkPath path;
- path.moveTo(pts[0]);
- path.lineTo(pts[1]);
- path.lineTo(pts[2]);
- SkPaint paint; // set to default kMiter_Join
- paint.setAntiAlias(true);
- paint.setStyle(SkPaint::kStroke_Style);
- paint.setStrokeMiter(miterLimit);
- paint.setStrokeWidth(strokeWidth);
- canvas->drawPath(path, paint);
- paint.setStrokeWidth(1);
- canvas->drawLine(pts[1].fX - miterLength / 2, pts[1].fY + 50,
- pts[1].fX + miterLength / 2, pts[1].fY + 50, paint);
- canvas->translate(200, 0);
- miterLimit *= 0.99f;
- paint.setStrokeMiter(miterLimit);
- paint.setStrokeWidth(strokeWidth);
- canvas->drawPath(path, paint);
- paint.setStrokeWidth(1);
- canvas->drawLine(pts[1].fX - miterLength / 2, pts[1].fY + 50,
- pts[1].fX + miterLength / 2, pts[1].fY + 50, paint);
- }
- } // END FIDDLE
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