129 lines
3.7 KiB
Kotlin
129 lines
3.7 KiB
Kotlin
package org.openrndr.extras.camera
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import org.openrndr.*
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import org.openrndr.math.Vector2
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import org.openrndr.math.Vector3
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class OrbitalControls(val orbitalCamera: OrbitalCamera) {
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enum class STATE {
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NONE,
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ROTATE,
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PAN,
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}
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private var state = STATE.NONE
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var fov = 90.0
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private lateinit var program: Program
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private lateinit var lastMousePosition: Vector2
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private fun mouseScrolled(event: MouseEvent) {
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if (Math.abs(event.rotation.x) > 0.1) return
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when {
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event.rotation.y > 0 -> orbitalCamera.dollyIn()
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event.rotation.y < 0 -> orbitalCamera.dollyOut()
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}
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}
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private fun mouseMoved(event: MouseEvent) {
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if (state == STATE.NONE) return
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val delta = lastMousePosition - event.position
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lastMousePosition = event.position
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if (state == STATE.PAN) {
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val offset = Vector3.fromSpherical(orbitalCamera.spherical) - orbitalCamera.lookAt
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// half of the fov is center to top of screen
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val targetDistance = offset.length * Math.tan((fov / 2) * Math.PI / 180)
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val panX = (2 * delta.x * targetDistance / program.window.size.x)
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val panY = (2 * delta.y * targetDistance / program.window.size.y)
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orbitalCamera.pan(panX, -panY, 0.0)
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} else {
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val rotX = 2 * Math.PI * delta.x / program.window.size.x
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val rotY = 2 * Math.PI * delta.y / program.window.size.y
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orbitalCamera.rotate(rotX, rotY)
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}
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}
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private fun mouseButtonDown(event: MouseEvent) {
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val previousState = state
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when (event.button) {
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MouseButton.LEFT -> {
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state = STATE.ROTATE
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}
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MouseButton.RIGHT -> {
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state = STATE.PAN
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}
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MouseButton.CENTER -> {
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}
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MouseButton.NONE -> {
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}
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}
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if (previousState == STATE.NONE) {
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lastMousePosition = event.position
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}
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}
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fun keyPressed(keyEvent: KeyEvent) {
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if (keyEvent.key == KEY_ARROW_RIGHT) {
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orbitalCamera.pan(1.0, 0.0, 0.0)
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}
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if (keyEvent.key == KEY_ARROW_LEFT) {
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orbitalCamera.pan(-1.0, 0.0, 0.0)
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}
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if (keyEvent.key == KEY_ARROW_UP) {
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orbitalCamera.pan(0.0, 1.0, 0.0)
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}
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if (keyEvent.key == KEY_ARROW_DOWN) {
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orbitalCamera.pan(0.0, -1.0, 0.0)
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}
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if (keyEvent.name == "q") {
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orbitalCamera.pan(0.0, -1.0, 0.0)
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}
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if (keyEvent.name == "e") {
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orbitalCamera.pan(0.0, 1.0, 0.0)
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}
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if (keyEvent.name == "w") {
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orbitalCamera.pan(0.0, 0.0, -1.0)
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}
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if (keyEvent.name == "s") {
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orbitalCamera.pan(0.0, 0.0, 1.0)
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}
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if (keyEvent.name == "a") {
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orbitalCamera.pan(-1.0, 0.0, 0.0)
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}
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if (keyEvent.name == "d") {
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orbitalCamera.pan(1.0, 0.0, 0.0)
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}
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if (keyEvent.key == KEY_PAGE_UP) {
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orbitalCamera.zoom(1.0)
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}
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if (keyEvent.key == KEY_PAGE_DOWN) {
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orbitalCamera.zoom(-1.0)
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}
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}
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fun setup(program: Program) {
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this.program = program
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program.mouse.moved.listen { mouseMoved(it) }
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program.mouse.buttonDown.listen { mouseButtonDown(it) }
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program.mouse.buttonUp.listen { state = STATE.NONE }
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program.mouse.scrolled.listen { mouseScrolled(it) }
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program.keyboard.keyDown.listen { keyPressed(it) }
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program.keyboard.keyRepeat.listen{ keyPressed(it) }
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}
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}
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