Draw a rotating cube: Difference between revisions
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Line 350:
f.setVisible(true);
});
}
}</lang>
=={{header|Kotlin}}==
{{trans|Java}}
<lang scala>// version 1.0.6
import java.awt.*
import java.awt.event.ActionEvent
import javax.swing.*
class RotatingCube(): JPanel() {
private val nodes = arrayOf(
doubleArrayOf(-1.0, -1.0, -1.0),
doubleArrayOf(-1.0, -1.0, 1.0),
doubleArrayOf(-1.0, 1.0, -1.0),
doubleArrayOf(-1.0, 1.0, 1.0),
doubleArrayOf( 1.0, -1.0, -1.0),
doubleArrayOf( 1.0, -1.0, 1.0),
doubleArrayOf( 1.0, 1.0, -1.0),
doubleArrayOf( 1.0, 1.0, 1.0)
)
private val edges = arrayOf(
intArrayOf(0, 1),
intArrayOf(1, 3),
intArrayOf(3, 2),
intArrayOf(2, 0),
intArrayOf(4, 5),
intArrayOf(5, 7),
intArrayOf(7, 6),
intArrayOf(6, 4),
intArrayOf(0, 4),
intArrayOf(1, 5),
intArrayOf(2, 6),
intArrayOf(3, 7)
)
init {
preferredSize = Dimension(640, 640)
background = Color.white
scale(100.0)
rotateCube(Math.PI / 4.0, Math.atan(Math.sqrt(2.0)))
Timer(17) {
rotateCube(Math.PI / 180.0, 0.0)
repaint()
}.start()
}
private fun scale(s: Double) {
for (node in nodes) {
node[0] *= s
node[1] *= s
node[2] *= s
}
}
private fun rotateCube(angleX: Double, angleY: Double) {
val sinX = Math.sin(angleX)
val cosX = Math.cos(angleX)
val sinY = Math.sin(angleY)
val cosY = Math.cos(angleY)
for (node in nodes) {
val x = node[0]
val y = node[1]
var z = node[2]
node[0] = x * cosX - z * sinX
node[2] = z * cosX + x * sinX
z = node[2]
node[1] = y * cosY - z * sinY
node[2] = z * cosY + y * sinY
}
}
private fun drawCube(g: Graphics2D) {
g.translate(width / 2, height / 2)
for (edge in edges) {
val xy1 = nodes[edge[0]]
val xy2 = nodes[edge[1]]
g.drawLine(Math.round(xy1[0]).toInt(), Math.round(xy1[1]).toInt(),
Math.round(xy2[0]).toInt(), Math.round(xy2[1]).toInt())
}
for (node in nodes) {
g.fillOval(Math.round(node[0]).toInt() - 4, Math.round(node[1]).toInt() - 4, 8, 8)
}
}
override public fun paintComponent(gg: Graphics) {
super.paintComponent(gg)
val g = gg as Graphics2D
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON)
g.color = Color.blue
drawCube(g)
}
}
fun main(args: Array<String>) {
SwingUtilities.invokeLater {
val f = JFrame()
f.defaultCloseOperation = JFrame.EXIT_ON_CLOSE
f.title = "Rotating cube"
f.setResizable(false)
f.add(RotatingCube(), BorderLayout.CENTER)
f.pack()
f.setLocationRelativeTo(null)
f.setVisible(true)
}
}</lang>
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