// 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