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")
                    }
                }
            }
    }
}