mapbox 表达式字符串生成
mapbox expression string generation
我正在尝试将不同的 rgba 颜色传递到 mapbox 中的不同点。我向每个点添加了一个 realiveOpacity 属性 并希望从其数据生成正确的颜色字符串。我尝试了两个表达式，但我猜语法有问题。它如何正确进行？
'circle-color': ["string", "rgba(255, 0, 0, ['get', 'realiveOpacity'])"]
["string", "rgba(255, 0, 0,"+ ['get', 'realiveOpacity'] + " )"]
这个构造函数工作：
["string", "rgba(255, 0, 0,0.5"]
非常感谢！
使用 rgba 函数：
Creates a color value from red, green, blue components, which must
range between 0 and 255, and an alpha component which must range
between 0 and 1. If any component is out of range, the expression is
an error.
["rgba", number, number, number, number]: color
https://www.mapbox.com/mapbox-gl-js/style-spec#expressions-rgba
"circle-color": ["rgba", 255, 0, 0, ["get", "realiveOpacity"]]
我正在尝试将不同的 rgba 颜色传递到 mapbox 中的不同点。我向每个点添加了一个 realiveOpacity 属性 并希望从其数据生成正确的颜色字符串。我尝试了两个表达式，但我猜语法有问题。它如何正确进行？
'circle-color': ["string", "rgba(255, 0, 0, ['get', 'realiveOpacity'])"]
["string", "rgba(255, 0, 0,"+ ['get', 'realiveOpacity'] + " )"]
这个构造函数工作：
["string", "rgba(255, 0, 0,0.5"]
非常感谢！
使用 rgba 函数：
Creates a color value from red, green, blue components, which must range between 0 and 255, and an alpha component which must range between 0 and 1. If any component is out of range, the expression is an error.
["rgba", number, number, number, number]: color
https://www.mapbox.com/mapbox-gl-js/style-spec#expressions-rgba
"circle-color": ["rgba", 255, 0, 0, ["get", "realiveOpacity"]]