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// Copyright (C) 2024 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
import QtQuick
import QtQuick3D
pragma ComponentBehavior: Bound
AxisGadget {
source: "meshes/rotate_mesh.mesh"
property quaternion originalRot
property vector3d pressOffset
property vector3d rotationPlaneNormal
property vector3d rotationAxis
function getAngleFromRay(pos: vector3d, dir: vector3d) : real {
const origin = scenePosition
const point3D = linePlaneIntersection(origin, rotationPlaneNormal, pos, dir)
const dragOffset = point3D.minus(origin).normalized()
const cos = dragOffset.dotProduct(pressOffset)
const sin = dragOffset.crossProduct(pressOffset).dotProduct(rotationPlaneNormal)
return -Math.atan2(sin, cos)
}
function linePlaneIntersection(planePoint: vector3d, planeNormal: vector3d, linePoint: vector3d, lineDirection: vector3d): vector3d {
let dot = planeNormal.dotProduct(lineDirection)
if (dot === 0) {
console.log("This should not happen")
return planePoint
}
const t = (planeNormal.dotProduct(planePoint) - planeNormal.dotProduct(linePoint)) / dot
return linePoint.plus(lineDirection.times(t))
}
onPressed: (pos, dir) => {
originalRot = controlledObject.rotation
rotationAxis = controlledObject.mapDirectionToScene(axisDirection).normalized()
const dot = rotationAxis.dotProduct(dir) // protect against rotation gadget being edge on:
rotationPlaneNormal = Math.abs(dot) < 0.2 ? dir.times(-1) : rotationAxis
const origin = scenePosition
pressOffset = linePlaneIntersection(origin, rotationPlaneNormal, pos, dir).minus(origin).normalized()
}
onMoved: (pos, dir) => {
const angle = getAngleFromRay(pos, dir)
controlledObject.rotation = originalRot.times(Quaternion.fromAxisAndAngle(axisDirection, angle * 180 / Math.PI))
}
}
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