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common shape: Fixed appendArc for negative values.

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Description:
Fixed appendArc API for -90 angles. In that case it was drawn in wrong
direction.

@Examples

```cpp
  float x = 40.0, y = 40.0;
  auto shape1 = tvg::Shape::gen();

  //OK
  shape1->appendArc(x + 50, y, 25, 0, -91, false);
  //NOK
  shape1->appendArc(x + 100, y, 25, 0, -90, false);
  //OK
  shape1->appendArc(x + 150, y, 25, 0, -89, false);
```
This commit is contained in:
Michal Szczecinski 2021-03-16 12:00:00 +01:00 • committed by Hermet Park
parent c40823d70e
commit 623a90de7b
1 changed files with 1 additions and 1 deletions
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2
src/lib/tvgShape.cpp
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@ -163,7 +163,7 @@ Result Shape::appendArc(float cx, float cy, float radius, float startAngle, floa
auto nCurves = ceil(abs(sweep / M_PI_HALF));
auto sweepSign = (sweep < 0 ? -1 : 1);
auto fract = fmodf(sweep, M_PI_HALF);
fract = (fabsf(fract) < std::numeric_limits<float>::epsilon()) ? M_PI_HALF : fract;
fract = (fabsf(fract) < std::numeric_limits<float>::epsilon()) ? M_PI_HALF * sweepSign : fract;
//Start from here
Point start = {radius * cos(startAngle), radius * sin(startAngle)};