playcanvas
Version:
Open-source WebGL/WebGPU 3D engine for the web
216 lines (215 loc) • 6.36 kB
JavaScript
import { EventHandler } from "../../core/event-handler.js";
import { Texture } from "../../platform/graphics/texture.js";
import { Vec4 } from "../../core/math/vec4.js";
import { Mat3 } from "../../core/math/mat3.js";
import { Mat4 } from "../../core/math/mat4.js";
import { ADDRESS_CLAMP_TO_EDGE, FILTER_LINEAR, FILTER_NEAREST, PIXELFORMAT_RGB8, PIXELFORMAT_R32F } from "../../platform/graphics/constants.js";
class XrView extends EventHandler {
static EVENT_DEPTHRESIZE = "depth:resize";
_manager;
_xrView;
_positionData = new Float32Array(3);
_viewport = new Vec4();
_projMat = new Mat4();
_projViewOffMat = new Mat4();
_viewMat = new Mat4();
_viewOffMat = new Mat4();
_viewMat3 = new Mat3();
_viewInvMat = new Mat4();
_viewInvOffMat = new Mat4();
_xrCamera = null;
_textureColor = null;
_textureDepth = null;
_depthInfo = null;
_emptyDepthBuffer = new Uint8Array(32);
_depthMatrix = new Mat4();
constructor(manager, xrView, viewsCount) {
super();
this._manager = manager;
this._xrView = xrView;
const device = this._manager.app.graphicsDevice;
if (this._manager.views.supportedColor) {
this._xrCamera = this._xrView.camera;
if (this._manager.views.availableColor && this._xrCamera) {
this._textureColor = new Texture(device, {
format: PIXELFORMAT_RGB8,
mipmaps: false,
addressU: ADDRESS_CLAMP_TO_EDGE,
addressV: ADDRESS_CLAMP_TO_EDGE,
minFilter: FILTER_LINEAR,
magFilter: FILTER_LINEAR,
width: this._xrCamera.width,
height: this._xrCamera.height,
name: `XrView-${this._xrView.eye}-Color`
});
}
}
if (this._manager.views.supportedDepth && this._manager.views.availableDepth) {
const filtering = this._manager.views.depthGpuOptimized ? FILTER_NEAREST : FILTER_LINEAR;
this._textureDepth = new Texture(device, {
format: this._manager.views.depthPixelFormat,
arrayLength: viewsCount === 1 ? 0 : viewsCount,
mipmaps: false,
addressU: ADDRESS_CLAMP_TO_EDGE,
addressV: ADDRESS_CLAMP_TO_EDGE,
minFilter: filtering,
magFilter: filtering,
width: 4,
height: 4,
name: `XrView-${this._xrView.eye}-Depth`
});
for (let i = 0; i < this._textureDepth._levels.length; i++) {
this._textureDepth._levels[i] = this._emptyDepthBuffer;
}
this._textureDepth.upload();
}
if (this._textureColor || this._textureDepth) {
device.on("devicelost", this._onDeviceLost, this);
}
}
get textureColor() {
return this._textureColor;
}
get textureDepth() {
return this._textureDepth;
}
get depthUvMatrix() {
return this._depthMatrix;
}
get depthValueToMeters() {
return this._depthInfo?.rawValueToMeters || 0;
}
get eye() {
return this._xrView.eye;
}
get viewport() {
return this._viewport;
}
get projMat() {
return this._projMat;
}
get projViewOffMat() {
return this._projViewOffMat;
}
get viewOffMat() {
return this._viewOffMat;
}
get viewInvOffMat() {
return this._viewInvOffMat;
}
get viewMat3() {
return this._viewMat3;
}
get positionData() {
return this._positionData;
}
update(frame, xrView) {
this._xrView = xrView;
if (this._manager.views.availableColor) {
this._xrCamera = this._xrView.camera;
}
const viewport = this._manager.xrBridge.getViewport(frame, this._xrView);
this._viewport.x = viewport.x;
this._viewport.y = viewport.y;
this._viewport.z = viewport.width;
this._viewport.w = viewport.height;
this._projMat.set(this._xrView.projectionMatrix);
this._viewMat.set(this._xrView.transform.inverse.matrix);
this._viewInvMat.set(this._xrView.transform.matrix);
this._updateTextureColor();
this._updateDepth(frame);
}
_updateTextureColor() {
if (!this._manager.views.availableColor || !this._xrCamera || !this._textureColor) {
return;
}
this._manager.xrBridge?.syncCameraColorTexture(this._xrCamera, this._textureColor);
}
_updateDepth(frame) {
if (!this._manager.views.availableDepth || !this._textureDepth) {
return;
}
const gpu = this._manager.views.depthGpuOptimized;
const infoSource = gpu ? this._manager.graphicsBinding : frame;
if (!infoSource) {
this._depthInfo = null;
return;
}
const depthInfo = infoSource.getDepthInformation(this._xrView);
if (!depthInfo) {
this._depthInfo = null;
return;
}
let matrixDirty = !this._depthInfo !== !depthInfo;
this._depthInfo = depthInfo;
const width = this._depthInfo?.width || 4;
const height = this._depthInfo?.height || 4;
let resized = false;
if (this._textureDepth.width !== width || this._textureDepth.height !== height) {
this._textureDepth._width = width;
this._textureDepth._height = height;
matrixDirty = true;
resized = true;
}
if (matrixDirty) {
if (this._depthInfo) {
this._depthMatrix.data.set(this._depthInfo.normDepthBufferFromNormView.matrix);
} else {
this._depthMatrix.setIdentity();
}
}
if (this._depthInfo) {
if (gpu) {
this._manager.xrBridge?.syncCameraDepthTexture(
this._depthInfo,
this._textureDepth,
this._manager.views.depthPixelFormat ?? PIXELFORMAT_R32F
);
} else {
this._textureDepth._levels[0] = new Uint8Array(this._depthInfo.data);
this._textureDepth.upload();
}
} else {
this._textureDepth._levels[0] = this._emptyDepthBuffer;
this._textureDepth.upload();
}
if (resized) this.fire("depth:resize", width, height);
}
updateTransforms(transform) {
if (transform) {
this._viewInvOffMat.mul2(transform, this._viewInvMat);
this.viewOffMat.copy(this._viewInvOffMat).invert();
} else {
this._viewInvOffMat.copy(this._viewInvMat);
this.viewOffMat.copy(this._viewMat);
}
this._viewMat3.setFromMat4(this._viewOffMat);
this._projViewOffMat.mul2(this._projMat, this._viewOffMat);
this._positionData[0] = this._viewInvOffMat.data[12];
this._positionData[1] = this._viewInvOffMat.data[13];
this._positionData[2] = this._viewInvOffMat.data[14];
}
_onDeviceLost() {
this._depthInfo = null;
}
getDepth(u, v) {
if (this._manager.views.depthGpuOptimized) {
return null;
}
return this._depthInfo?.getDepthInMeters(u, v) ?? null;
}
destroy() {
this._depthInfo = null;
if (this._textureColor) {
this._textureColor.destroy();
this._textureColor = null;
}
if (this._textureDepth) {
this._textureDepth.destroy();
this._textureDepth = null;
}
}
}
export {
XrView
};