input_into_rendering.kt

package gl3

import com.jogamp.newt.event.*
import com.jogamp.newt.opengl.GLWindow
import com.jogamp.opengl.*
import com.jogamp.opengl.GL2ES3.GL_COLOR
import com.jogamp.opengl.util.Animator
import com.jogamp.opengl.util.GLBuffers
import glm.set
import uno.buffer.toFloatBuffer

/**
 * Created by GBarbieri on 27.03.2017.
 */

fun main(args: Array<String>) {
    Input_into_rendering_().initGL()
}

class Input_into_rendering_ : GLEventListener, KeyListener {

    lateinit var window: GLWindow
    lateinit var animator: Animator

    val clearColor = floatArrayOf(0f, 0f, 0f, 0f).toFloatBuffer()

    val eventFiFo = NEWTEventFiFo()

    fun initGL() {

        val glProfile = GLProfile.get(GLProfile.GL3)
        val glCapabilities = GLCapabilities(glProfile)

        window = GLWindow.create(glCapabilities)

        window.title = "Input into rendering"
        window.setSize(1024, 768)

        window.addGLEventListener(this)
        window.addKeyListener(this)

        window.isVisible = true

        animator = Animator(window)
        animator.start()

        window.addWindowListener(object : WindowAdapter() {
            override fun windowDestroyed(e: WindowEvent?) {
                animator.stop()
                System.exit(1)
            }
        })
    }

    override fun init(drawable: GLAutoDrawable) {}

    override fun reshape(drawable: GLAutoDrawable, x: Int, y: Int, width: Int, height: Int) {}

    override fun display(drawable: GLAutoDrawable) {

        val gl = drawable.gl.gL3

        var event = eventFiFo.get()
        while (event != null) {
            if (event is KeyEvent && event.eventType == KeyEvent.EVENT_KEY_PRESSED)
                when (event.keyCode) {
                    KeyEvent.VK_R -> modified(0)
                    KeyEvent.VK_G -> modified(1)
                    KeyEvent.VK_B -> modified(2)
                    KeyEvent.VK_A -> modified(3)
                }
            event = eventFiFo.get()
        }

        gl.glClearBufferfv(GL_COLOR, 0, clearColor)
    }

    fun modified(index: Int) {
        clearColor[index] = if (clearColor.get(index) == 0f) 1f else 0f
        println("clear color: (" + clearColor[0] + ", " + clearColor[1] + ", " + clearColor[2] + ", " + clearColor[3] + ")")
    }

    override fun dispose(drawable: GLAutoDrawable) {}

    override fun keyPressed(e: KeyEvent) {

        if (e.keyCode == KeyEvent.VK_ESCAPE)
            Thread { window.destroy() }.start()

        eventFiFo.put(e)
    }

    override fun keyReleased(e: KeyEvent) {
        eventFiFo.put(e)
    }
}