func (d *Diamonds) render(g *dwg.GraphicContext, h, v *vec.Vec, data chan Occur) {
for step := range data {
g.Save()
g.Rotate(step.Arc)
g.Translate(90, 0)
d.drawDiamond(
g,
h.Scale(step.Scale, step.Scale),
v.Scale(step.Scale, step.Scale),
RgbaColor(150, 140+step.N, 0, step.Opacity),
)
g.Restore()
}
}
func drawSnowflake(sys string, gc *draw2dimg.GraphicContext) {
angle := float64(0)
lineLength := float64(10)
x, y := float64(1000), float64(1000)
gc.MoveTo(x, y)
for _, i := range sys {
switch string(i) {
case "F":
x, y = nextPoint(angle, lineLength, x, y)
gc.LineTo(x, y)
case "+":
angle += math.Pi / 3
case "-":
angle -= math.Pi / 3
}
}
}
func (d *Diamonds) drawDiamond(g *dwg.GraphicContext, h, v *vec.Vec, c color.Color) {
g.SetFillColor(c)
g.SetStrokeColor(c)
g.BeginPath()
g.MoveTo(0.0, v.Y)
g.LineTo(h.X, 0.0)
g.LineTo(0.0, -v.Y)
g.LineTo(-h.X, 0.0)
g.LineTo(0.0, v.Y)
g.Fill()
}