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Adds the ability to draw an XY scatter plot. (#27)

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* works more or less

* updating comment

* removing debugging printf

* adding output

* tweaks

* missed a couple series validations

* testing auto coloring

* updated output.png

* color tests etc.

* sanity check tests.

* should not use unkeyed fields anyway.
This commit is contained in:
Will Charczuk 2017-03-05 16:54:40 -08:00 • committed by GitHub
parent 17b28beae8
commit b713ff85cc
22 changed files with 511 additions and 72 deletions
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15
raster_renderer.go
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@ -116,17 +116,16 @@ func (rr *rasterRenderer) FillStroke() {
rr.gc.FillStroke()
}
// Circle implements the interface method.
// Circle fully draws a circle at a given point but does not apply the fill or stroke.
func (rr *rasterRenderer) Circle(radius float64, x, y int) {
xf := float64(x)
yf := float64(y)
rr.gc.MoveTo(xf-radius, yf) //9
rr.gc.QuadCurveTo(xf, yf, xf, yf-radius) //12
rr.gc.QuadCurveTo(xf, yf, xf+radius, yf) //3
rr.gc.QuadCurveTo(xf, yf, xf, yf+radius) //6
rr.gc.QuadCurveTo(xf, yf, xf-radius, yf) //9
rr.gc.Close()
rr.gc.FillStroke()
rr.gc.MoveTo(xf-radius, yf) //9
rr.gc.QuadCurveTo(xf-radius, yf-radius, xf, yf-radius) //12
rr.gc.QuadCurveTo(xf+radius, yf-radius, xf+radius, yf) //3
rr.gc.QuadCurveTo(xf+radius, yf+radius, xf, yf+radius) //6
rr.gc.QuadCurveTo(xf-radius, yf+radius, xf-radius, yf) //9
}
// SetFont implements the interface method.