43 lines
1.8 KiB
C++
43 lines
1.8 KiB
C++
#if 0 // Disabled until updated to use current API.
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// Copyright 2019 Google LLC.
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// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
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#include "tools/fiddle/examples.h"
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// HASH=386000684073fccabc224d7d6dc81cd9
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REG_FIDDLE(Path_arcTo_2_a, 256, 226, false, 0) {
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void draw(SkCanvas* canvas) {
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SkPaint tangentPaint;
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tangentPaint.setAntiAlias(true);
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SkPaint textPaint(tangentPaint);
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tangentPaint.setStyle(SkPaint::kStroke_Style);
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tangentPaint.setColor(SK_ColorGRAY);
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SkPaint arcPaint(tangentPaint);
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arcPaint.setStrokeWidth(5);
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arcPaint.setColor(SK_ColorBLUE);
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SkPath path;
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SkPoint pts[] = { {56, 20}, {200, 20}, {90, 190} };
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SkScalar radius = 50;
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path.moveTo(pts[0]);
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path.arcTo(pts[1], pts[2], radius);
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canvas->drawLine(pts[0], pts[1], tangentPaint);
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canvas->drawLine(pts[1], pts[2], tangentPaint);
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SkPoint lastPt;
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(void) path.getLastPt(&lastPt);
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SkVector radial = pts[2] - pts[1];
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radial.setLength(radius);
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SkPoint center = { lastPt.fX - radial.fY, lastPt.fY + radial.fX };
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canvas->drawCircle(center, radius, tangentPaint);
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canvas->drawLine(lastPt, center, tangentPaint);
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radial = pts[1] - pts[0];
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radial.setLength(radius);
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SkPoint arcStart = { center.fX + radial.fY, center.fY - radial.fX };
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canvas->drawLine(center, arcStart, tangentPaint);
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canvas->drawPath(path, arcPaint);
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canvas->drawString("(x0, y0)", pts[0].fX - 5, pts[0].fY, textPaint);
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canvas->drawString("(x1, y1)", pts[1].fX + 5, pts[1].fY, textPaint);
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canvas->drawString("(x2, y2)", pts[2].fX, pts[2].fY + 15, textPaint);
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canvas->drawString("radius", center.fX + 15, center.fY + 25, textPaint);
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canvas->drawString("radius", center.fX - 3, center.fY - 16, textPaint);
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}
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} // END FIDDLE
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#endif // Disabled until updated to use current API.
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