testproject/basic.html at master · lehoangphu/testproject · GitHub

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<!DOCTYPE html>

<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta charset="utf-8" />
    <title>BASIC WebVR request and exit present</title>
    <script src="iframeHelper.js"></script>
    <script id="vertex" type="x-shader">
      attribute vec2 aVertexPosition;
      void main() {
        gl_Position = vec4(aVertexPosition, 0.0, 1.0);
      }
    </script>
    <script id="fragment" type="x-shader">
      #ifdef GL_ES
      precision highp float;
      #endif
      uniform vec4 uColor;
      void main() {
        gl_FragColor = uColor;
      }
    </script>
</head>
<body onload="init()">
    <div id="testdiv">
        <canvas id="webglcanvas"></canvas>
    </div>
    <button onclick="requestPresent()">Request Present</button>
    <button onclick="exitPresent()">Exit Present</button>
    <button onclick="getVRDisplays()">Get VR Displays</button>
    <br/>
    <button onclick="exitPendingRequestPresent()">Exit pending + request present</button>
    <button onclick="requestPendingExitPresent()">Request pending + exit present</button>
    <br/>
    <button onclick="doubleRequestPresent()">Double request present</button>
    <button onclick="doubleExitPresent()">Double exit present</button>
    <br/>
    <button onclick="printGamepads()">GetGamepads</button>
    <br/>
    <button onclick="newPage()">New page</button>
    <div>
    <textarea id="output" rows="20" cols="70"></textarea>
    </div>
    <script>
        var logTextArea = null;
        var vrDisplay;
        var canvas = null;
        var gamepad0;

        function newPage() {

        }

        function printGamepads(){
            var gps = navigator.getGamepads();
            for ( var i=0; i<gps.length; ++i) {
              output("GAMEPAD INDEX " + i);
              if (!!gps[i]) {
                output("-- Gamepad connected at index " + gps[i].index + " id: " + gps[i].id + " is connected: " + gps[i].connected);
              }
              else {
                output("-- No gamepad at " + i);
              }
            }
        }

        // New requestPresent while one is already pending
        function doubleRequestPresent(){
            window.navigator.getVRDisplays().then(function (displays) {
                output("getVRDisplays fulfilled with " + displays.length + " displays");
                vrDisplay = displays[0];
                var pendingPromise = vrDisplay.requestPresent();
                vrDisplay.requestPresent().then(function(){
                    output("New request present while requestPresent is pending succeeded");
                }).catch(function(){
                    output("New request present while requestPresent is pending failed");
                })

                pendingPromise.then(function(){
                  output("Pending request present succeeded.");
                }).catch(function(){
                  output("Pending request present failed.");
                })
            })
        }

        // New exitPresent while one is already pending
        function doubleExitPresent(){
            var pendingPromise = vrDisplay.exitPresent();
            vrDisplay.exitPresent().then(function(){
                output("New exit present while exitPresent is pending succeeded");
            }).catch(function(){
                output("New exit present while exitPresent is pending failed");
            })

            pendingPromise.then(function(){
              output("Pending exitPresent succeeded.");
            }).catch(function(){
              output("Pending exitPresent failed.");
            })
        }

        // New exit present while request is pending
        function requestPendingExitPresent(){
            var pendingPromise = vrDisplay.requestPresent();
            vrDisplay.exitPresent().then(function(){
                output("New exit present while requestPresent is pending succeeded");
            }).catch(function(){
                output("New exit present while requestPresent is pending failed");
            })

            pendingPromise.then(function(){
              output("Pending request present succeeded.");
            }).catch(function(){
              output("Pending request present failed.");
            })
        }

        // New request present while exit is pending
        function exitPendingRequestPresent(){
            var pendingPromise = vrDisplay.exitPresent();
            vrDisplay.requestPresent().then(function(){
                output("New request present while exitPresent is pending succeeded");
            }).catch(function(){
                output("New request present while exitPresent is pending failed");
            })

            pendingPromise.then(function(){
              output("Pending exit present succeeded.");
            }).catch(function(){
              output("Pending exit present failed.");
            })
        }

        // getVRDisplays
        function getVRDisplays()
        {
          output("GetVRDisplays");
          window.navigator.getVRDisplays().then(function(displays){
              output(displays[0]);
          })
        }

        function onAnimationFrame() {
          if (!!vrDisplay && vrDisplay.isPresenting) {
            animationId = vrDisplay.requestAnimationFrame(onAnimationFrame);
            vrDisplay.submitFrame();
          }
        }

        // requestPresent
        var animationId;
        function requestPresent() {
            output("Begin request present...");
            window.navigator.getVRDisplays().then(function (displays) {
                output("getVRDisplays fulfilled with " + displays.length + " displays");
                vrDisplay = displays[0];
                vrDisplay.requestPresent([{ source: canvas }]).then(() => {
                    output("Request present succeeded.");
                    animationId = vrDisplay.requestAnimationFrame(onAnimationFrame);
                },
                () => {
                    output("Request present failed.");
                })
            });
        }

        // Exit present
        function exitPresent(){
            if (!!animationId) {
              vrDisplay.cancelAnimationFrame(animationId);
            }
            vrDisplay.exitPresent().then(function(){
                output("Exit present succeeded")
            }).catch(function(){
                output("Exit present failed")
            })
        }

        // init
        function init(){
            setupOutputLog();
            setupCanvas();

            window.addEventListener("gamepadconnected", function (e) {
                output("gamepad connected " + e.gamepad.id);
                gamepad0 = e.gamepad;
            });

            window.addEventListener("gamepaddisconnected", function () {
                output("gamepad disconnected");
            });

            window.addEventListener("vrdisplaypresentchange", function () {
              output("vrdisplaypresentchange triggered. Is presenting? " + vrDisplay.isPresenting);

            });

            window.addEventListener("vrdisplaydisconnect", function () {
                if (!vrDisplay){
                  output("vrDisplay is not defined or null, getVRDIsplays to initialize it.");
                }
                output("vrdisplayDisconnect triggered. isConnected? " + vrDisplay.isConnected);
            });

            window.addEventListener("vrdisplayconnect", function () {
                if (!vrDisplay){
                  output("vrDisplay is not defined or null, getVRDIsplays to initialize it.");
                }
                window.navigator.getVRDisplays().then(function (displays) {
                  output("getVRDisplays fulfilled with " + displays.length + " displays");
                  vrDisplay = displays[0];
                  vrDisplay.requestAnimationFrame(onAnimationFrame);
                  output("vrdisplayConnect triggered. isConnected? " + vrDisplay.isConnected);
                });
            });

            window.addEventListener("vrdisplaypointerrestricted", function () {
                output("vrdisplaypointerrestricted triggered.");
            });

           window.addEventListener("vrdisplaypointerunrestricted", function () {
                output("vrdisplaypointerunrestricted triggered.");
            });

        }

        function onAnimationFrame() {
          vrDisplay.requestAnimationFrame(onAnimationFrame);
        }

        // Setup the textarea to output to
        function setupOutputLog(){
            logTextArea = document.getElementById("output");
            logTextArea.value = "";
        }

        // Output to the text area
        function output(s){
            logTextArea.value += s + "\n";
            logTextArea.scrollTop = logTextArea.scrollHeight;
        }

        // Setup the canvas
        function setupCanvas(){
          canvas = document.getElementById("webglcanvas");
          var gl = canvas.getContext("experimental-webgl");
          gl.viewport(0, 0, canvas.width, canvas.height);
          gl.clearColor(0, 0.5, 0, 1);
          gl.clear(gl.COLOR_BUFFER_BIT);

          var v = document.getElementById("vertex").firstChild.nodeValue;
          var f = document.getElementById("fragment").firstChild.nodeValue;

          var vs = gl.createShader(gl.VERTEX_SHADER);
          gl.shaderSource(vs, v);
          gl.compileShader(vs);

          var fs = gl.createShader(gl.FRAGMENT_SHADER);
          gl.shaderSource(fs, f);
          gl.compileShader(fs);

          program = gl.createProgram();
          gl.attachShader(program, vs);
          gl.attachShader(program, fs);
          gl.linkProgram(program);

          var aspect = canvas.width / canvas.height;

          var vertices = new Float32Array([
          -0.5, 0.5*aspect, 0.5, 0.5*aspect, 0.5,-0.5*aspect, // Triangle 1
          -0.5, 0.5*aspect, 0.5,-0.5*aspect, -0.5,-0.5*aspect // Triangle 2
          ]);

          vbuffer = gl.createBuffer();
          gl.bindBuffer(gl.ARRAY_BUFFER, vbuffer);
          gl.bufferData(gl.ARRAY_BUFFER, vertices, gl.STATIC_DRAW);

          itemSize = 2;
          numItems = vertices.length / itemSize;

          gl.useProgram(program);

          program.uColor = gl.getUniformLocation(program, "uColor");
          gl.uniform4fv(program.uColor, [0.0, 0.3, 0.0, 1.0]);

          program.aVertexPosition = gl.getAttribLocation(program, "aVertexPosition");
          gl.enableVertexAttribArray(program.aVertexPosition);
          gl.vertexAttribPointer(program.aVertexPosition, itemSize, gl.FLOAT, false, 0, 0);
          gl.drawArrays(gl.TRIANGLES, 0, numItems);
      }
    </script>
</body>
</html>