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show sum of cubic errors

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Bug: skia:
Change-Id: I7738c58af3a641daa386a3be2833c29dc2e17d4b
Reviewed-on: https://skia-review.googlesource.com/121896
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
This commit is contained in:
Mike Reed 2018-04-17 17:10:51 -04:00 committed by Skia Commit-Bot
parent c186e17a6b
commit dccfa3568d
1 changed files with 6 additions and 0 deletions
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6
samplecode/SamplePath.cpp
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@ -669,6 +669,9 @@ protected:
paint.setStyle(SkPaint::kStroke_Style);
paint.setAntiAlias(true);
SkPaint paint2(paint);
paint2.setColor(0xFF008800);
paint.setColor(0xFF888888);
canvas->drawLine(fPts[0], fPts[3], paint);
canvas->drawLine(fQuad[0], fQuad[2], paint);
@ -683,15 +686,18 @@ protected:
SkVector v0 = (fPts[0] - fPts[1] - fPts[1] + fPts[2]) * fScale;
SkVector v1 = (fPts[1] - fPts[2] - fPts[2] + fPts[3]) * fScale;
SkVector v = (v0 + v1) * 0.5f;
SkPoint anchor;
SkScalar ts[2];
int n = find_max_deviation_cubic(fPts, ts);
if (n > 0) {
SkEvalCubicAt(fPts, ts[0], &anchor, nullptr, nullptr);
canvas->drawLine(anchor, anchor + v, paint2);
canvas->drawLine(anchor, anchor + v0, paint);
if (n == 2) {
SkEvalCubicAt(fPts, ts[1], &anchor, nullptr, nullptr);
canvas->drawLine(anchor, anchor + v, paint2);
}
canvas->drawLine(anchor, anchor + v1, paint);
}