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123 lines
4.1 KiB
123 lines
4.1 KiB
/*
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* Copyright 2011 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "include/core/SkCanvas.h"
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#include "include/core/SkPath.h"
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#include "include/utils/SkRandom.h"
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#include "samplecode/Sample.h"
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class HairCurvesView : public Sample {
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public:
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HairCurvesView() {
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}
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protected:
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SkString name() override { return SkString("HairCurves"); }
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void onDrawContent(SkCanvas* canvas) override {
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setStyle(SkPaint::kStroke_Style);
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paint.setStrokeWidth(0);
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canvas->save();
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canvas->scale(1000 * SK_Scalar1, 1000 * SK_Scalar1);
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SkRandom rand;
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SkRandom randW;
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SkPath curves;
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SkPath hulls;
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SkPath ctrlPts;
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for (int i = 0; i < 100; ++i) {
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SkScalar pts[] = {
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rand.nextUScalar1(), rand.nextUScalar1(),
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rand.nextUScalar1(), rand.nextUScalar1(),
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rand.nextUScalar1(), rand.nextUScalar1(),
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rand.nextUScalar1(), rand.nextUScalar1()
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};
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curves.moveTo(pts[0], pts[1]);
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curves.cubicTo(pts[2], pts[3],
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pts[4], pts[5],
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pts[6], pts[7]);
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hulls.moveTo(pts[0], pts[1]);
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hulls.lineTo(pts[2], pts[3]);
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hulls.lineTo(pts[4], pts[5]);
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hulls.lineTo(pts[6], pts[7]);
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ctrlPts.addCircle(pts[0], pts[1], SK_Scalar1 / 200);
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ctrlPts.addCircle(pts[2], pts[3], SK_Scalar1 / 200);
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ctrlPts.addCircle(pts[4], pts[5], SK_Scalar1 / 200);
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ctrlPts.addCircle(pts[6], pts[7], SK_Scalar1 / 200);
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}
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for (int i = 0; i < 100; ++i) {
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SkScalar pts[] = {
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rand.nextUScalar1(), rand.nextUScalar1(),
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rand.nextUScalar1(), rand.nextUScalar1(),
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rand.nextUScalar1(), rand.nextUScalar1(),
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};
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curves.moveTo(pts[0], pts[1]);
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curves.quadTo(pts[2], pts[3],
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pts[4], pts[5]);
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hulls.moveTo(pts[0], pts[1]);
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hulls.lineTo(pts[2], pts[3]);
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hulls.lineTo(pts[4], pts[5]);
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ctrlPts.addCircle(pts[0], pts[1], SK_Scalar1 / 200);
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ctrlPts.addCircle(pts[2], pts[3], SK_Scalar1 / 200);
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ctrlPts.addCircle(pts[4], pts[5], SK_Scalar1 / 200);
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}
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for (int i = 0; i < 100; ++i) {
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SkScalar pts[] = {
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rand.nextUScalar1(), rand.nextUScalar1(),
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rand.nextUScalar1(), rand.nextUScalar1(),
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rand.nextUScalar1(), rand.nextUScalar1(),
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};
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SkScalar weight = randW.nextUScalar1() * 2.0f;
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curves.moveTo(pts[0], pts[1]);
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curves.conicTo(pts[2], pts[3],
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pts[4], pts[5],
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weight);
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hulls.moveTo(pts[0], pts[1]);
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hulls.lineTo(pts[2], pts[3]);
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hulls.lineTo(pts[4], pts[5]);
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ctrlPts.addCircle(pts[0], pts[1], SK_Scalar1 / 200);
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ctrlPts.addCircle(pts[2], pts[3], SK_Scalar1 / 200);
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ctrlPts.addCircle(pts[4], pts[5], SK_Scalar1 / 200);
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}
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for (int i = 0; i < 100; ++i) {
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SkScalar pts[] = {
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rand.nextUScalar1(), rand.nextUScalar1(),
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rand.nextUScalar1(), rand.nextUScalar1(),
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};
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curves.moveTo(pts[0], pts[1]);
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curves.lineTo(pts[2], pts[3]);
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ctrlPts.addCircle(pts[0], pts[1], SK_Scalar1 / 200);
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ctrlPts.addCircle(pts[2], pts[3], SK_Scalar1 / 200);
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}
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paint.setColor(SK_ColorBLACK);
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canvas->drawPath(curves, paint);
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paint.setColor(SK_ColorRED);
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//canvas->drawPath(hulls, paint);
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paint.setStyle(SkPaint::kFill_Style);
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paint.setColor(SK_ColorBLUE);
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//canvas->drawPath(ctrlPts, paint);
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canvas->restore();
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}
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private:
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using INHERITED = Sample;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_SAMPLE( return new HairCurvesView(); )
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