91 lines
2.8 KiB
Scala
91 lines
2.8 KiB
Scala
import java.awt._
|
|
import java.awt.event.{MouseAdapter, MouseEvent}
|
|
|
|
import javax.swing._
|
|
|
|
import scala.math.{Pi, cos, sin}
|
|
|
|
object Cuboid extends App {
|
|
SwingUtilities.invokeLater(() => {
|
|
|
|
class Cuboid extends JPanel {
|
|
private val nodes: Array[Array[Double]] =
|
|
Array(Array(-1, -1, -1), Array(-1, -1, 1), Array(-1, 1, -1), Array(-1, 1, 1),
|
|
Array(1, -1, -1), Array(1, -1, 1), Array(1, 1, -1), Array(1, 1, 1))
|
|
private var mouseX, prevMouseX, mouseY, prevMouseY: Int = _
|
|
|
|
private def edges =
|
|
Seq(Seq(0, 1), Seq(1, 3), Seq(3, 2), Seq(2, 0),
|
|
Seq(4, 5), Seq(5, 7), Seq(7, 6), Seq(6, 4),
|
|
Seq(0, 4), Seq(1, 5), Seq(2, 6), Seq(3, 7))
|
|
|
|
override def paintComponent(gg: Graphics): Unit = {
|
|
val g = gg.asInstanceOf[Graphics2D]
|
|
|
|
def drawCube(g: Graphics2D): Unit = {
|
|
g.translate(getWidth / 2, getHeight / 2)
|
|
for (edge <- edges) {
|
|
g.drawLine(nodes(edge.head)(0).round.toInt, nodes(edge.head)(1).round.toInt,
|
|
nodes(edge(1))(0).round.toInt, nodes(edge(1))(1).round.toInt)
|
|
}
|
|
for (node <- nodes) g.fillOval(node(0).round.toInt - 4, node(1).round.toInt - 4, 8, 8)
|
|
}
|
|
|
|
super.paintComponent(gg)
|
|
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON)
|
|
drawCube(g)
|
|
}
|
|
|
|
private def scale(sx: Double, sy: Double, sz: Double): Unit = {
|
|
for (node <- nodes) {
|
|
node(0) *= sx
|
|
node(1) *= sy
|
|
node(2) *= sz
|
|
}
|
|
}
|
|
|
|
private def rotateCube(angleX: Double, angleY: Double): Unit = {
|
|
val (sinX, cosX, sinY, cosY) = (sin(angleX), cos(angleX), sin(angleY), cos(angleY))
|
|
for (node <- nodes) {
|
|
val (x, y, z) = (node.head, node(1), node(2))
|
|
node(0) = x * cosX - z * sinX
|
|
node(2) = z * cosX + x * sinX
|
|
node(1) = y * cosY - node(2) * sinY
|
|
node(2) = node(2) * cosY + y * sinY
|
|
}
|
|
}
|
|
|
|
addMouseListener(new MouseAdapter() {
|
|
override def mousePressed(e: MouseEvent): Unit = {
|
|
mouseX = e.getX
|
|
mouseY = e.getY
|
|
}
|
|
})
|
|
|
|
addMouseMotionListener(new MouseAdapter() {
|
|
override def mouseDragged(e: MouseEvent): Unit = {
|
|
prevMouseX = mouseX
|
|
prevMouseY = mouseY
|
|
mouseX = e.getX
|
|
mouseY = e.getY
|
|
rotateCube((mouseX - prevMouseX) * 0.01, (mouseY - prevMouseY) * 0.01)
|
|
repaint()
|
|
}
|
|
})
|
|
|
|
scale(80, 120, 160)
|
|
rotateCube(Pi / 5, Pi / 9)
|
|
setPreferredSize(new Dimension(640, 640))
|
|
setBackground(Color.white)
|
|
}
|
|
|
|
new JFrame("Cuboid") {
|
|
add(new Cuboid, BorderLayout.CENTER)
|
|
pack()
|
|
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE)
|
|
setLocationRelativeTo(null)
|
|
setResizable(false)
|
|
setVisible(true)
|
|
}
|
|
})
|
|
}
|