is color detected (#952)

* added query function

* reshuffle
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Peli de Halleux 2019-10-20 09:02:17 -07:00 committed by GitHub
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@ -179,6 +179,22 @@ namespace sensors {
return this.getNumber(NumberFormat.UInt8LE, 0) return this.getNumber(NumberFormat.UInt8LE, 0)
} }
/**
* Checks the color is being detected
* @param color the color to detect
*/
//% help=sensors/color-sensor/is-color-detected
//% block="is **color sensor** %this|detected|%color=colorEnumPicker"
//% blockId=colorisColorDetectedDetected
//% parts="colorsensor"
//% blockNamespace=sensors
//% this.fieldEditor="ports"
//% weight=99 blockGap=8
//% group="Color Sensor"
isColorDetected(color: number) {
return this.color() == color;
}
/** /**
* Get the current raw rgb values as an array from the color sensor. * Get the current raw rgb values as an array from the color sensor.
* @param sensor the color sensor to query the request * @param sensor the color sensor to query the request

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@ -0,0 +1,30 @@
# Is Color Detected
Checks the color is detected
```sig
let b = sensors.color1.isColorDetected(ColorSensorColor.Blue)
```
The [color](/reference/sensors/color) you choose to look for is one of the colors that the sensor can detect. If you want to use colors for tracking, it's best to use a color that is the same or very close to the ones the sensor detects.
## Parameters
* **color**: the [color](/reference/sensors/color) to watch for.
## Example
Wait for the sensor to see ``blue``. Then, show an expression on the screen.
```blocks
brick.showString("Waiting for blue", 1)
while(!sensors.color1.isColorDetected(ColorSensorColor.Blue)) {
pause(20)
}
brick.clearScreen()
brick.showImage(images.expressionsSick)
```
## See also
[on color detected](/reference/sensors/color-sensor/on-color-detected), [color](/reference/sensors/color)