99 lines
3.2 KiB
Swift
99 lines
3.2 KiB
Swift
//
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/**
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* Copyright (c) 2019 Razeware LLC
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* Notwithstanding the foregoing, you may not use, copy, modify, merge, publish,
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* distribute, sublicense, create a derivative work, and/or sell copies of the
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* Software in any work that is designed, intended, or marketed for pedagogical or
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* instructional purposes related to programming, coding, application development,
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* or information technology. Permission for such use, copying, modification,
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* merger, publication, distribution, sublicensing, creation of derivative works,
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* or sale is expressly withheld.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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import MetalKit
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class Node {
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var name: String = "untitled"
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var position: float3 = [0, 0, 0]
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var rotation: float3 = [0, 0, 0] {
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didSet {
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let rotationMatrix = float4x4(rotation: rotation)
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quaternion = simd_quatf(rotationMatrix)
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}
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}
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var quaternion = simd_quatf()
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var scale:float3 = [1, 1, 1]
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var modelMatrix: float4x4 {
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let translateMatrix = float4x4(translation: position)
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let rotateMatrix = float4x4(quaternion)
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let scaleMatrix = float4x4(scaling: scale)
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return translateMatrix * rotateMatrix * scaleMatrix
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}
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var boundingBox = MDLAxisAlignedBoundingBox()
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var size: float3 {
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return boundingBox.maxBounds - boundingBox.minBounds
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}
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var parent: Node?
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var children: [Node] = []
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func update(deltaTime: Float) {
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// override this
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}
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final func add(childNode: Node) {
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children.append(childNode)
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childNode.parent = self
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}
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final func remove(childNode: Node) {
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for child in childNode.children {
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child.parent = self
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children.append(child)
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}
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childNode.children = []
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guard let index = (children.firstIndex {
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$0 === childNode
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}) else { return }
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children.remove(at: index)
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childNode.parent = nil
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}
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var worldTransform: float4x4 {
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if let parent = parent {
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return parent.worldTransform * self.modelMatrix
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}
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return modelMatrix
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}
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var forwardVector: float3 {
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return normalize([sin(rotation.y), 0, cos(rotation.y)])
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}
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var rightVector: float3 {
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return [forwardVector.z, forwardVector.y, -forwardVector.x]
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}
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}
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