func (c *RGBA) SetColors(r, g, b, a float64) {
	c.rgba.red = C.gdouble(r)
	c.rgba.green = C.gdouble(g)
	c.rgba.blue = C.gdouble(b)
	c.rgba.alpha = C.gdouble(a)
}
func (c *RGBA) SetColors(r, g, b, a float64) {
	c.rgba.red = C.gdouble(r)
	c.rgba.green = C.gdouble(g)
	c.rgba.blue = C.gdouble(b)
	c.rgba.alpha = C.gdouble(a)
}
func ( c * RGBA ) SetColors ( r , g , b , a float64 ) { c . rgba . red = C . gdouble ( r ) c . rgba . green = C . gdouble ( g ) c . rgba . blue = C . gdouble ( b ) c . rgba . alpha = C . gdouble ( a ) }
// SetColors sets all colors values in the RGBA.
SetColors sets all colors values in the RGBA .