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camera-worker.ts
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import {mat4, quat, vec3} from "gl-matrix";
import copyWithOffset from "../utils/copy-with-offset";
import CameraNotificationDecoder from "../lib/CameraNotificationDecoder";
class CameraWorker {
static needsUpdate = false
static translationBuffer: Float32Array
static rotationBuffer: Float32Array
static notificationBuffers: Float32Array
static position: Float32Array
static viewMatrix: Float32Array
static projectionMatrix: Float32Array
static invViewMatrix: Float32Array
static invProjectionMatrix: Float32Array
static viewProjectionMatrix: Float32Array
static staticViewMatrix: Float32Array
static initialized = false
static projectionBuffer: Float32Array
static skyboxProjectionMatrix: Float32Array
static invSkyboxProjectionMatrix: Float32Array
static currentTranslation = vec3.create()
static currentRotation = quat.create()
static projectionUBOBuffer: Float32Array
static viewUBOBuffer: Float32Array
static initialize(data: Float32Array[]) {
const [
notificationBuffers,
position,
viewMatrix,
projectionMatrix,
invViewMatrix,
invProjectionMatrix,
staticViewMatrix,
translationBuffer,
rotationBuffer,
skyboxProjectionMatrix,
invSkyboxProjectionMatrix,
projectionBuffer,
viewProjectionMatrix,
viewUBOBuffer,
projectionUBOBuffer
] = data
if (CameraWorker.initialized)
return
CameraWorker.viewProjectionMatrix = viewProjectionMatrix
CameraWorker.projectionBuffer = projectionBuffer
CameraWorker.initialized = true
CameraWorker.position = position
CameraWorker.viewMatrix = viewMatrix
CameraWorker.projectionMatrix = projectionMatrix
CameraWorker.invViewMatrix = invViewMatrix
CameraWorker.invProjectionMatrix = invProjectionMatrix
CameraWorker.staticViewMatrix = staticViewMatrix
CameraWorker.translationBuffer = translationBuffer
CameraWorker.rotationBuffer = rotationBuffer
CameraWorker.notificationBuffers = notificationBuffers
CameraWorker.skyboxProjectionMatrix = skyboxProjectionMatrix
CameraWorker.invSkyboxProjectionMatrix = invSkyboxProjectionMatrix
vec3.copy(CameraWorker.currentTranslation, CameraWorker.translationBuffer)
quat.copy(CameraWorker.currentRotation, CameraWorker.rotationBuffer)
CameraWorker.viewUBOBuffer = viewUBOBuffer
CameraWorker.projectionUBOBuffer = projectionUBOBuffer
CameraNotificationDecoder.initialize(notificationBuffers)
mat4.multiply(CameraWorker.viewProjectionMatrix, CameraWorker.projectionMatrix, CameraWorker.viewMatrix)
}
static updateProjection() {
const isOrthographic = CameraNotificationDecoder.projectionType === CameraNotificationDecoder.ORTHOGRAPHIC
const buffer = CameraWorker.projectionBuffer
const aR = buffer[3]
const fov = buffer[2]
const zFar = buffer[0]
const zNear = buffer[1]
const orthographicProjectionSize = buffer[4]
if (isOrthographic)
mat4.ortho(CameraWorker.projectionMatrix, -orthographicProjectionSize, orthographicProjectionSize, -orthographicProjectionSize / aR, orthographicProjectionSize / aR, -zFar, zFar)
else {
mat4.perspective(CameraWorker.projectionMatrix, fov, aR, zNear, zFar)
mat4.perspective(CameraWorker.skyboxProjectionMatrix, fov, aR, .1, 1000)
mat4.invert(CameraWorker.invSkyboxProjectionMatrix, CameraWorker.skyboxProjectionMatrix)
}
mat4.invert(CameraWorker.invProjectionMatrix, CameraWorker.projectionMatrix)
mat4.multiply(CameraWorker.viewProjectionMatrix, CameraWorker.projectionMatrix, CameraWorker.viewMatrix)
CameraWorker.updateUBO()
}
static updateStaticViewMatrix() {
const matrix = mat4.copy(CameraWorker.staticViewMatrix, CameraWorker.viewMatrix)
matrix[12] = matrix[13] = matrix[14] = 0
return matrix
}
static updateView() {
mat4.fromRotationTranslation(CameraWorker.invViewMatrix, CameraWorker.currentRotation, CameraWorker.currentTranslation)
mat4.invert(CameraWorker.viewMatrix, CameraWorker.invViewMatrix)
const m = CameraWorker.invViewMatrix
CameraWorker.position[0] = m[12]
CameraWorker.position[1] = m[13]
CameraWorker.position[2] = m[14]
mat4.multiply(CameraWorker.viewProjectionMatrix, CameraWorker.projectionMatrix, CameraWorker.viewMatrix)
CameraWorker.updateUBO()
CameraWorker.updateStaticViewMatrix()
}
static updateUBO(){
const V = CameraWorker.viewUBOBuffer
copyWithOffset(V, CameraWorker.viewProjectionMatrix, 0)
copyWithOffset(V, CameraWorker.viewMatrix, 16)
copyWithOffset(V, CameraWorker.invViewMatrix, 32)
copyWithOffset(V, CameraWorker.position, 48)
const P = CameraWorker.projectionUBOBuffer
copyWithOffset(P, CameraWorker.projectionMatrix, 0)
copyWithOffset(P, CameraWorker.invProjectionMatrix, 16)
}
static execute() {
const didViewChange = CameraNotificationDecoder.viewNeedsUpdate === 1
CameraWorker.needsUpdate = CameraWorker.needsUpdate || didViewChange
const elapsed = CameraNotificationDecoder.elapsed
CameraNotificationDecoder.hasChangedView = 0
CameraNotificationDecoder.hasChangedProjection = 0
if (CameraWorker.needsUpdate) {
const tSmoothing = CameraNotificationDecoder.translationSmoothing
const incrementTranslation = tSmoothing === 0 ? 1 : 1 - Math.pow(.001, elapsed * tSmoothing)
const lengthTranslationPrev = vec3.length(CameraWorker.currentTranslation)
vec3.lerp(CameraWorker.currentTranslation, CameraWorker.currentTranslation, CameraWorker.translationBuffer, incrementTranslation)
const lengthTranslationAfter = vec3.length(CameraWorker.currentTranslation)
const lengthRotationPrev = quat.length(CameraWorker.currentRotation)
quat.copy(CameraWorker.currentRotation, CameraWorker.rotationBuffer)
const lengthRotationAfter = quat.length(CameraWorker.currentRotation)
const offsetRotation = Math.abs(lengthRotationPrev - lengthRotationAfter)
const offsetTranslation = Math.abs(lengthTranslationPrev - lengthTranslationAfter)
if (offsetRotation > 0 || offsetTranslation > 1e-6) {
CameraWorker.updateView()
CameraNotificationDecoder.viewNeedsUpdate = 0
CameraNotificationDecoder.hasChangedView = 1
} else {
CameraWorker.needsUpdate = false
CameraNotificationDecoder.viewNeedsUpdate = 0
CameraNotificationDecoder.hasChangedView = 0
}
}
const cameraIsOrthographic = CameraNotificationDecoder.projectionType === CameraNotificationDecoder.ORTHOGRAPHIC
if (CameraNotificationDecoder.projectionNeedsUpdate === 1 || cameraIsOrthographic && didViewChange) {
CameraWorker.updateProjection()
CameraNotificationDecoder.hasChangedProjection = 1
CameraNotificationDecoder.hasChangedView = 1
CameraNotificationDecoder.projectionNeedsUpdate = 0
}
}
}
self.onmessage = (event) => {
if (!CameraWorker.initialized)
CameraWorker.initialize(<Float32Array[]>event.data)
CameraWorker.execute()
}