void openFrameworksDevice::Arc( float left, float top, float right, float bottom,
float startX, float startY, float endX, float endY )
{
const float midX = (left + right) * 0.5f;
const float midY = (top + bottom) * 0.5f;
const float width = right - left;
const float height = bottom - top;
const float fromRadians = CoordToRadian( startX - midX, startY - midY );
const float toRadians = CoordToRadian( endX - midX, endY - midY );
ofPath path;
path.arc(left, top, width, height, fromRadians, toRadians, true);
path.setFilled(true);
path.draw();
}
void CairoDevice::Arc( float left, float top, float right, float bottom, float startX, float startY, float endX, float endY )
{
const float midX = (left + right) * 0.5f;
const float midY = (top + bottom) * 0.5f;
const float width = right - left;
const float height = bottom - top;
// - Draw
const float angle1 = CoordToRadian( startX - midX, startY - midY );
const float angle2 = CoordToRadian( endX - midX, endY - midY );
cairo_save (fNativeDevice);
cairo_translate (fNativeDevice, midX + width / 2., midY + height / 2.);
cairo_scale (fNativeDevice, width / 2., height / 2.);
cairo_arc (fNativeDevice, midX, midY, angle1, angle2, 0);
cairo_restore (fNativeDevice);
cairo_set_source_rgba (fNativeDevice, c2cc(fPenColor.mRed), c2cc(fPenColor.mGreen), c2cc(fPenColor.mBlue), c2cc(fPenColor.mAlpha));
cairo_stroke (fNativeDevice);
}
