DemoOlive01.kt

import org.openrndr.Extension
import org.openrndr.application
import org.openrndr.color.ColorRGBa
import org.openrndr.extensions.SingleScreenshot
import org.openrndr.extra.olive.oliveProgram
import kotlin.math.cos

/**
 * Live-coding with [oliveProgram]
 */
fun main() = application {
    configure {
        width = 1280
        height = 720
    }
    oliveProgram {
        extend {
            drawer.clear(ColorRGBa.PINK)
            drawer.fill = ColorRGBa.WHITE
            for (i in 0 until 100) {
                drawer.circle(
                    width / 2.0 + cos(seconds + i) * 320.0,
                    i * 7.2,
                    cos(i + seconds * 0.5) * 20.0 + 20.0
                )
            }
        }
    }
        // -- this is only needed for the automated screenshots
        .olive.scriptLoaded.listen {
            if (System.getProperty("takeScreenshot") == "true") {
                // -- this is a bit of hack, we need to push the screenshot extension in front of the olive one
                fun <T : Extension> extendHead(extension: T, configure: T.() -> Unit): T {
                    program.extensions.add(0, extension)
                    extension.configure()
                    extension.setup(program)
                    return extension
                }
                extendHead(SingleScreenshot()) {
                    this.outputFile = System.getProperty("screenshotPath")
                }
            }
        }
}