OpenTX 2.1 Lua Reference Guide
  • OpenTX 2.1 Lua Reference Guide
  • Introduction
    • Acknowledgments
    • Getting Started
  • Part I - Script Type Overview
    • Mix Scripts
    • Telemetry Scripts
    • One-Time Scripts
    • Wizard Script
    • Function Scripts
  • Part II - OpenTX Lua API Programming Guide
    • Input Table Syntax
    • Output Table Syntax
    • Init Function Syntax
    • Run Function Syntax
    • Return Statement Syntax
    • Included Lua Libraries
      • io Library
        • io.open()
        • io.close()
        • io.read()
        • io.write()
        • io.seek()
  • Part III - OpenTX Lua API Reference
    • Constants
      • Key Event Constants
    • General Functions
      • GREY()
      • defaultChannel(stick)
      • defaultStick(channel)
      • getDateTime()
      • getFieldInfo(name)
      • getFlightMode(mode)
      • getGeneralSettings()
      • getTime()
      • getValue(source)
      • getVersion()
      • killEvents(key)
      • playDuration(duration [, hourFormat])
      • playFile(name)
      • playNumber(value, unit [, attributes])
      • playTone(frequency, duration, pause [, flags [, freqIncr]])
      • popupInput(title, event, input, min, max)
    • Model Functions
      • model.defaultInputs()
      • model.deleteInput(input, line)
      • model.deleteInputs()
      • model.deleteMix(channel, line)
      • model.deleteMixes()
      • model.getCurve(curve)
      • model.getCustomFunction(function)
      • model.getGlobalVariable(index [, flight_mode])
      • model.getInfo()
      • model.getInput(input, line)
      • model.getInputsCount(input)
      • model.getLogicalSwitch(switch)
      • model.getMix(channel, line)
      • model.getMixesCount(channel)
      • model.getModule(index)
      • model.getOutput(index)
      • model.getTimer(timer)
      • model.insertInput(input, line, value)
      • model.insertMix(channel, line, value)
      • model.resetTimer(timer)
      • model.setCustomFunction(function, value)
      • model.setGlobalVariable(index, flight_mode, value)
      • model.setInfo(value)
      • model.setLogicalSwitch(switch, value)
      • model.setModule(index, value)
      • model.setOutput(index, value)
      • model.setTimer(timer, value)
    • Lcd Functions
      • Lcd Functions Overview
      • lcd.clear()
      • lcd.drawChannel(x, y, source, flags)
      • lcd.drawCombobox(x, y, w, list, idx [, flags])
      • lcd.drawFilledRectangle(x, y, w, h [, flags])
      • lcd.drawGauge(x, y, w, h, fill, maxfill)
      • lcd.drawLine(x1, y1, x2, y2, pattern, flags)
      • lcd.drawNumber(x, y, value [, flags])
      • lcd.drawPixmap(x, y, name)
      • lcd.drawPoint(x, y)
      • lcd.drawRectangle(x, y, w, h [, flags])
      • lcd.drawScreenTitle(title, page, pages)
      • lcd.drawSource(x, y, source [, flags])
      • lcd.drawSwitch(x, y, switch, flags)
      • lcd.drawText(x, y, text [, flags])
      • lcd.drawTimer(x, y, value [, flags])
      • lcd.getLastPos()
      • lcd.lock()
  • Part IV - Converting OpenTX 2.0 Scripts
    • General Issues
    • Handling GPS Sensor data
    • Handling Lipo Sensor Data
  • Part V - Advanced Topics
    • Lua data sharing across scripts
    • Debugging techniques
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  • Parameters
  • Return value
  • Examples

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  1. Part III - OpenTX Lua API Reference
  2. Lcd Functions

lcd.drawPoint(x, y)

Previouslcd.drawPixmap(x, y, name)Nextlcd.drawRectangle(x, y, w, h [, flags])

Last updated 4 years ago

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Draws a single pixel at (x,y) position

@status current Introduced in 2.0.0

Parameters

  • x (positive number) x position

  • y (positive number) y position

Return value

none

Notice

Taranis has an LCD display width of 212 pixels and height of 64 pixels. Position (0,0) is at top left. Y axis is negative, top line is 0, bottom line is 63. Drawing on an existing black pixel produces white pixel (TODO check this!)

Examples

local function circle(xCenter, yCenter, radius)
  local y, x
  for y=-radius, radius do
    for x=-radius, radius do
        if(x*x+y*y <= radius*radius) then
            lcd.drawPoint(xCenter+x, yCenter+y)
        end
    end
  end
end


local function run(event)
  lcd.clear()
  lcd.drawText(1,1,"drawPoint() example", 0)
  circle(50, 25, 10)
  circle(65, 25, 10)
end

return{run=run}
lcd/drawPoint-example