XRRigidTransform.inverse - Web APIs
the read-only inverse property of the xrrigidtransform interface returns another xrrigidtransform object which is the inverse of its owning transform.
... that is, you can always get the inverse of any xrrigidtransform using its inverse property, instead of having to explicitly generate it.
... syntax let transforminverse = xrrigidtransform.inverse; value an xrrigidtransform which contains the inverse of the xrrigidtransform on which it's accessed.
...And 5 more matches

Movement, orientation, and motion: A WebXR example - Web APIs
const viewerstartposition = vec3.fromvalues(0, 0, -10); const viewerstartorientation = vec3.fromvalues(0, 0, 1.0); const cubeorientation = vec3.create(); const cubematrix = mat4.create(); const mousematrix = mat4.create(); const inverseorientation = quat.create(); const radians_per_degree = math.pi / 180.0; the first two—viewerstartposition and viewerstartorientation—indicate where the viewer will be placed relative to the center of the space, and the direction in which they'll initially be looking.
...inverseorientation is a quaternion which will be used to represent the rotation to apply to the reference space for the object in the frame being rendered.
... function applyviewercontrols(refspace) { if (!mouseyaw && !mousepitch && !axialdistance && !transversedistance && !verticaldistance) { return refspace; } quat.identity(inverseorientation); quat.rotatex(inverseorientation, inverseorientation, -mousepitch); quat.rotatey(inverseorientation, inverseorientation, -mouseyaw); let newtransform = new xrrigidtransform({x: transversedistance, y: verticaldistance, z: axialdistance}, {x: inverseorientation[0], y: in...
...And 5 more matches

Viewpoints and viewers: Simulating cameras in WebXR - Web APIs
since you're actually moving everything except the camera, take the inverse of the transform matrix to get an inverse transform matrix.
... this inverse matrix can then be applied to the objects in the world to alter their positions and orientations to simulate the desired camera position.
... this is why the xrrigidtransform object used by webxr to represent transforms includes an inverse property.
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<blend-mode> - CSS: Cascading Style Sheets
<div id="div"></div> #div { width: 300px; height: 300px; background: url('https://mdn.mozillademos.org/files/8543/br.png'), url('https://mdn.mozillademos.org/files/8545/tr.png'); background-blend-mode: lighten; } color-dodge the final color is the result of dividing the bottom color by the inverse of the top color.
...a foreground with the inverse color of the backdrop leads to a fully lit color.
... this blend mode is similar to screen, but the foreground need only be as light as the inverse of the backdrop to create a fully lit color.
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PannerNode.distanceModel - Web APIs
the possible values are: linear: a linear distance model calculating the gain induced by the distance according to: 1 - rollofffactor * (distance - refdistance) / (maxdistance - refdistance) inverse: an inverse distance model calculating the gain induced by the distance according to: refdistance / (refdistance + rollofffactor * (math.max(distance, refdistance) - refdistance)) exponential: an exponential distance model calculating the gain induced by the distance according to: pow((math.max(distance, refdistance) / refdistance, -rollofffactor).
... inverse is the default value of distancemodel.
... syntax var audioctx = new audiocontext(); var panner = audioctx.createpanner(); panner.distancemodel = 'inverse'; value a enum — see distancemodeltype.
... panner position information var width = window.innerwidth; var height = window.innerheight; var xpos = math.floor(width/2); var ypos = math.floor(height/2); var zpos = 295; // define other variables var audiocontext = window.audiocontext || window.webkitaudiocontext; var audioctx = new audiocontext(); var panner = audioctx.createpanner(); panner.panningmodel = 'hrtf'; panner.distancemodel = 'inverse'; panner.refdistance = 1; panner.maxdistance = 10000; panner.rollofffactor = 1; panner.coneinnerangle = 360; panner.coneouterangle = 0; panner.coneoutergain = 0; if(panner.orientationx) { panner.orientationx.setvalueattime(1, audioctx.currenttime); panner.orientationy.setvalueattime(0, audioctx.currenttime); panner.orientationz.setvalueattime(0, audioctx.currenttime); } else { panner.set...

WebGL model view projection - Web APIs
instead of moving the camera backward and to the left, we apply the inverse transform to the box: we move the box backward one meter, and then 10 centimeters to its right.
...in order for this to work out correctly, the inverse of the transform matrix must be used.
... the inverse matrix essentially reverses a transformation, so if we move the camera view forward, the inverse matrix causes the objects in the scene to move back.
...tion(now) { var moveinandout = 20 * math.sin(now * 0.002); var moveleftandright = 15 * math.sin(now * 0.0017); // move the camera around var position = mdn.translatematrix(moveleftandright, 0, 50 + moveinandout ); // multiply together, make sure and read them in opposite order var matrix = mdn.multiplyarrayofmatrices([ // exercise: rotate the camera view position ]); // inverse the operation for camera movements, because we are actually // moving the geometry in the scene, not the camera itself.

XRView.transform - Web APIs
if you instead need the more traditional view matrix, you can get using view.transform.inverse.matrix; this gets the underlying matrix of the transform's inverse.
...you can then use the inverse of this matrix to transform the objects in your scene to adjust their placement and orientation to simulate the viewer's movement through space.
... const modelviewmatrix = mat4.create(); const normalmatrix = mat4.create(); for (let view of pose.views) { let viewport = gllayer.getviewport(view); gl.viewport(viewport.x, viewport.y, viewport.width, viewport.height); for (let obj of world.objects) { mat4.multiply(modelviewmatrix, view.transform.inverse.matrix, obj.matrix); mat4.invert(normalmatrix, modelviewmatrix); mat4.transpose(normalmatrix, normalmatrix); obj.render(modelviewmatrix, normalmatrix); } } two matrices are created outside the rendering loop; this avoids repeatedly allocating and deallocating the matrices, and generally reduces overhead by reusing the same matrix for each object rendered.
...to convert the "camera focused" transform matrix into an "object focused" transform, we use the transform's inverse, thus taking the matrix returned by view.transform.inverse.matrix.

XRView - Web APIs
model view matrix the model view matrix is a matrix which defines the position of an object relative to the space in which it's located: if objectmatrix is a transform applied to the object to provide its basic position and rotation, then the model view matrix can be computed by multiplying the object's matrix by the inverse of the view transform matrix, like this: mat4.multiply(modelviewmatrix, view.transform.inverse.matrix, objectmatrix); normal matrix the model view's normal matrix is used when lighting the scene, in order to transform each surface's normal vectors to ensure that the light is reflected in the correct direction given the orientation and position of the surface relative to the light source or sou...
... quat.identity(inverseorientation); quat.rotatex(inverseorientation, inverseorientation, -mousepitch); quat.rotatey(inverseorientation, inverseorientation, -mouseyaw); // compute the true "up" vector for our object.
... let newtransform = new xrrigidtransform({x: transversedistance, y: verticaldistance, z: axialdistance}, {x: inverseorientation[0], y: inverseorientation[1], z: inverseorientation[2], w: inverseorientation[3]}); mat4.copy(mousematrix, newtransform.matrix); // create a new reference space that transforms the object to the new // position and orientation, returning the new reference space.
...in the first, the quaternion inverseorientation is computed.

Gecko info for Windows accessibility vendors
enum { navrelation_labelled_by = 0x1003 }; enum { navrelation_described_by = 0x100e }; these two relations are they inverse; they can be used on form controls.
...the inverse controlled_by relation is automatically calculated.
...both flows_to and flows_from are set in markup from the single dynamic content accessibility aaa:flowsto relation -- the inverse flow_from relation is automatically calculated.

PannerNode - Web APIs
possible values are "linear", "inverse" and "exponential".
... the default value is "inverse".
... panner position information var width = window.innerwidth; var height = window.innerheight; var xpos = math.floor(width/2); var ypos = math.floor(height/2); var zpos = 295; // define other variables var audiocontext = window.audiocontext || window.webkitaudiocontext; var audioctx = new audiocontext(); var panner = audioctx.createpanner(); panner.panningmodel = 'hrtf'; panner.distancemodel = 'inverse'; panner.refdistance = 1; panner.maxdistance = 10000; panner.rollofffactor = 1; panner.coneinnerangle = 360; panner.coneouterangle = 0; panner.coneoutergain = 0; if(panner.orientationx) { panner.orientationx.setvalueattime(1, audioctx.currenttime); panner.orientationy.setvalueattime(0, audioctx.currenttime); panner.orientationz.setvalueattime(0, audioctx.currenttime); } else { panner.set...

XRReferenceSpace.getOffsetReferenceSpace() - Web APIs
the boundsgeometry of the new reference space is set to the original object's boundsgeometry with each of its points multiplied by the inverse of originoffset.
... let mouseyaw = 0.0; let mousepitch = 0.0; const inverseorientation = quat.create(); const mouse_speed = 0.003; function rotateviewby(dx, dy) { mouseyaw += dx * mouse_speed; mousepitch += dy * mouse_speed; if (mousepitch < -math.pi * 0.5) { mousepitch = -math.pi * 0.5; } else if (mousepitch > math.pi * 0.5) { mousepitch = math.pi * 0.5; } } finally, we need code that actually applies the computed yaw and pitch to the viewer's orien...
...this function, applymousemovement(), handles that: function applymousemovement(refspace) { if (!mouseyaw && !mousepitch) { return refspace; } quat.identity(inverseorientation); quat.rotatex(inverseorientation, inverseorientation, -mousepitch); quat.rotatey(inverseorientation, inverseorientation, -mouseyaw); let newtransform = new xrrigidtransform({x: 0, y: 0, z: 0}, {x: inverseorientation[0], y: inverseorientation[1], z: inverseorientation[2], w: inverseorientation[3]}); return refspace.getoffsetreferencespace(newtransform); } this function creates an inverse orientation matrix—used to orient the viewer—from the current pitch and yaw values, then uses that matrix as the source of the orientation when calling ne...

Math.clz32() - JavaScript
doing this will work because the inverse of 1 is 0 and vice-versa.
... thus, inversing the bits will inverse the measured quantity of 0's (from math.clz32), thereby making math.clz32 count the number of ones instead of counting the number of zeros.
... consider the following 32-bit word: var a = 32776; // 00000000000000001000000000001000 (16 leading zeros) math.clz32(a); // 16 var b = ~32776; // 11111111111111110111111111110111 (32776 inversed, 0 leading zeros) math.clz32(b); // 0 (this is equal to how many leading one's there are in a) using this logic, a clon function can be created as follows: var clz = math.clz32; function clon(integer){ return clz(~integer); } further, this technique could be extended to create jumpless "count trailing zeros" and "count trailing ones" functions as seen below.

Midas
it takes the same values as contentreadonly, but the meaning of true and false are inversed.
...it takes the same values as stylewithcss, but the meaning of true and false are inversed.

SubtleCrypto - Web APIs
the inverse of exportkey() is importkey().
... the inverse of wrapkey() is unwrapkey(), which decrypts then imports the key.

XRRigidTransform - Web APIs
the advantage to using xrrigidtransform in these places rather than bare arrays that providing the matrix data is that the xrrigidtransform automatically does things like computing the inverse of the transform.
... xrrigidtransform.inverse read only returns a xrrigidtransform which is the inverse of this transform.