diff --git a/public/index.html b/public/index.html index a24508f46cff7bffb3e77a0695416e3e3d2b0e1d..ae94858fbf6aebc43378b2fdab3ee48e2cfb4186 100644 --- a/public/index.html +++ b/public/index.html @@ -60,6 +60,34 @@ session.updateRenderState({ // A 'local' reference space has a native origin that is located // near the viewer's position at the time the session was created. const referenceSpace = await session.requestReferenceSpace('local'); +// Create a render loop that allows us to draw on the AR view. +const onXRFrame = (time, frame) => { + // Queue up the next draw request. + session.requestAnimationFrame(onXRFrame); + + // Bind the graphics framebuffer to the baseLayer's framebuffer + gl.bindFramebuffer(gl.FRAMEBUFFER, session.renderState.baseLayer.framebuffer) + + // Retrieve the pose of the device. + // XRFrame.getViewerPose can return null while the session attempts to establish tracking. + const pose = frame.getViewerPose(referenceSpace); + if (pose) { + // In mobile AR, we only have one view. + const view = pose.views[0]; + + const viewport = session.renderState.baseLayer.getViewport(view); + renderer.setSize(viewport.width, viewport.height) + + // Use the view's transform matrix and projection matrix to configure the THREE.camera. + camera.matrix.fromArray(view.transform.matrix) + camera.projectionMatrix.fromArray(view.projectionMatrix); + camera.updateMatrixWorld(true); + + // Render the scene with THREE.WebGLRenderer. + renderer.render(scene, camera) + } +} +session.requestAnimationFrame(onXRFrame); } </script>