files/en-us/web/api/vrframedata/rightprojectionmatrix/index.md
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The rightProjectionMatrix read-only property of the {{domxref("VRFrameData")}} interface returns a {{jsxref("Float32Array")}} representing a 4x4 matrix that describes the projection to be used for the right eye's rendering.
[!NOTE] This property was part of the old WebVR API. It has been superseded by the WebXR Device API.
This value may be passed directly to WebGL's {{domxref("WebGLRenderingContext.uniformMatrix", "uniformMatrix4fv")}} function.
[!WARNING] It is highly recommended that applications use this matrix without modification. Failure to use this projection matrix when rendering may cause the presented frame to be distorted or badly aligned, resulting in varying degrees of user discomfort.
A {{jsxref("Float32Array")}} object.
See VRDisplay.getFrameData() for example code.
This property was part of the old WebVR API that has been superseded by the WebXR Device API. It is no longer on track to becoming a standard.
Until all browsers have implemented the new WebXR APIs, it is recommended to rely on frameworks, like A-Frame, Babylon.js, or Three.js, or a polyfill, to develop WebXR applications that will work across all browsers. Read Meta's Porting from WebVR to WebXR guide for more information.
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