/
cubeInsTest.html
584 lines (483 loc) · 22.5 KB
/
cubeInsTest.html
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<html>
<head>
<title>Cube Test (Instancing)</title>
<meta http-equiv="content-type" content="text/html; charset=ISO-8859-1">
<script type="text/javascript" src="glMatrix-0.9.5.min.js"></script>
<script type="text/javascript" src="webgl-utils.js"></script>
<script id="shader-vs" type="x-shader/x-vertex">
attribute vec3 aVertexPosition;
attribute vec2 aTextureCoord;
attribute vec3 aInstancePosition;
uniform mat4 uMVMatrix;
uniform mat4 uPMatrix;
varying vec2 vTextureCoord;
void main(void) {
gl_Position = uPMatrix * uMVMatrix * vec4(aVertexPosition + aInstancePosition, 1.0);
vTextureCoord = aTextureCoord;
}
</script>
<script id="shader-fs" type="x-shader/x-fragment">
precision mediump float;
varying vec2 vTextureCoord;
uniform sampler2D uSampler;
void main(void) {
gl_FragColor = texture2D(uSampler, vec2(vTextureCoord.s, vTextureCoord.t));
}
</script>
<script type="text/javascript">
var gl;
var ext;
function initGL(canvas) {
try {
gl = canvas.getContext("experimental-webgl");
gl.viewportWidth = canvas.width;
gl.viewportHeight = canvas.height;
ext = gl.getExtension('ANGLE_instanced_arrays');
if (null == ext) {
alert('ANGLE_instanced_arrays not supported');
return;
}
if (null == gl.getExtension('OES_element_index_uint')) {
alert('OES_element_index_uint not supported');
return;
}
} catch (e) {
}
if (!gl) {
alert("Could not initialise WebGL, sorry :-(");
}
}
function getShader(gl, id) {
var shaderScript = document.getElementById(id);
if (!shaderScript) {
return null;
}
var str = "";
var k = shaderScript.firstChild;
while (k) {
if (k.nodeType == 3) {
str += k.textContent;
}
k = k.nextSibling;
}
var shader;
if (shaderScript.type == "x-shader/x-fragment") {
shader = gl.createShader(gl.FRAGMENT_SHADER);
} else if (shaderScript.type == "x-shader/x-vertex") {
shader = gl.createShader(gl.VERTEX_SHADER);
} else {
return null;
}
gl.shaderSource(shader, str);
gl.compileShader(shader);
if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {
alert(gl.getShaderInfoLog(shader));
return null;
}
return shader;
}
var shaderProgram;
function initShaders() {
var fragmentShader = getShader(gl, "shader-fs");
var vertexShader = getShader(gl, "shader-vs");
shaderProgram = gl.createProgram();
gl.attachShader(shaderProgram, vertexShader);
gl.attachShader(shaderProgram, fragmentShader);
gl.linkProgram(shaderProgram);
if (!gl.getProgramParameter(shaderProgram, gl.LINK_STATUS)) {
alert("Could not initialise shaders");
}
gl.useProgram(shaderProgram);
shaderProgram.vertexPositionAttribute = gl.getAttribLocation(shaderProgram, "aVertexPosition");
gl.enableVertexAttribArray(shaderProgram.vertexPositionAttribute);
shaderProgram.textureCoordAttribute = gl.getAttribLocation(shaderProgram, "aTextureCoord");
gl.enableVertexAttribArray(shaderProgram.textureCoordAttribute);
shaderProgram.instancePositionAttribute = gl.getAttribLocation(shaderProgram, "aInstancePosition");
gl.enableVertexAttribArray(shaderProgram.instancePositionAttribute);
shaderProgram.pMatrixUniform = gl.getUniformLocation(shaderProgram, "uPMatrix");
shaderProgram.mvMatrixUniform = gl.getUniformLocation(shaderProgram, "uMVMatrix");
shaderProgram.samplerUniform = gl.getUniformLocation(shaderProgram, "uSampler");
}
var mvMatrix = mat4.create();
var mvMatrixStack = [];
var pMatrix = mat4.create();
function mvPushMatrix() {
var copy = mat4.create();
mat4.set(mvMatrix, copy);
mvMatrixStack.push(copy);
}
function mvPopMatrix() {
if (mvMatrixStack.length == 0) {
throw "Invalid popMatrix!";
}
mvMatrix = mvMatrixStack.pop();
}
function degToRad(degrees) {
return degrees * Math.PI / 180;
}
//function setMatrixUniforms() {
// gl.uniformMatrix4fv(shaderProgram.pMatrixUniform, false, pMatrix);
// gl.uniformMatrix4fv(shaderProgram.mvMatrixUniform, false, mvMatrix);
//}
var _vertAry;
var _texAry;
var _posAry;
var _idxAry;
var _data = {};
var _xBlocks = 10;
var _yBlocks = 10;
var _zBlocks = 10;
function initBuffers(x, y, z) {
_xBlocks = x;
_yBlocks = y;
_zBlocks = z;
// make data
var xs = (-_xBlocks + 1) / 2;
var xm = xs + _xBlocks - 1;
var ys = (-_yBlocks + 1) / 2;
var ym = ys + _yBlocks - 1;
var zs = (-_zBlocks + 1) / 2;
var zm = zs + _zBlocks - 1;
var distance = 1.5;
makeData(xs, ys, zs, xm, ym, zm,
distance, distance, distance,
_data);
_vertAry = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, _vertAry);
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(_data.vboV), gl.STATIC_DRAW);
_texAry = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, _texAry);
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(_data.vboT), gl.STATIC_DRAW);
_posAry = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, _posAry);
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(_data.vboV2), gl.STATIC_DRAW);
_idxAry = gl.createBuffer();
gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, _idxAry);
gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Uint32Array(_data.indices), gl.STATIC_DRAW);
}
function makeData(xs, ys, zs, xm, ym, zm,
xd, yd, zd,
data) {
let num = (xm - xs + 1) * (ym - ys + 1) * (zm - zs + 1);
const VERT_PER_CUBE = 42;
const TEX_PER_CUBE = 28;
const POS_PER_CUBE = 3;
const IDX_PER_CUBE = 14;
let size_of_float = 4;
let size_of_unsigned_int = 4;
let memorySize = (VERT_PER_CUBE + TEX_PER_CUBE + POS_PER_CUBE * num) * size_of_float
+ IDX_PER_CUBE * size_of_unsigned_int;
document.getElementById("memory").innerText = "memory usage " + memorySize.toLocaleString() + " bytes";
let xr = 0.5;
let yr = 0.5;
let zr = 0.5;
let texBaseX = 1.0;
let texBaseY = 1.0;
let texUnitX = 16.0;
let texUnitY = 16.0;
let texUnitZ = 16.0;
const TEX_SIZE = 128.0;
texBaseX /= TEX_SIZE;
texBaseY /= TEX_SIZE;
texUnitX /= TEX_SIZE;
texUnitY /= TEX_SIZE;
texUnitZ /= TEX_SIZE;
data.vboV = [];
data.vboT = [];
data.indices = [];
var x = 0.0;
var y = 0.0;
var z = 0.0;
// 0
data.vboV.push(x - xr);
data.vboV.push(y - yr);
data.vboV.push(z + zr);
data.vboT.push(texBaseX + texUnitX * 2 + texUnitY * 2);
data.vboT.push(texBaseY + texUnitY);
// 1
data.vboV.push(x + xr);
data.vboV.push(y - yr);
data.vboV.push(z + zr);
data.vboT.push(texBaseX + texUnitX * 3 + texUnitY * 2);
data.vboT.push(texBaseY + texUnitY);
// 2
data.vboV.push(x - xr);
data.vboV.push(y + yr);
data.vboV.push(z + zr);
data.vboT.push(texBaseX + texUnitX * 2 + texUnitY * 2);
data.vboT.push(texBaseY);
// 3
data.vboV.push(x + xr);
data.vboV.push(y + yr);
data.vboV.push(z + zr);
data.vboT.push(texBaseX + texUnitX * 3 + texUnitY * 2);
data.vboT.push(texBaseY);
// 4
data.vboV.push(x - xr);
data.vboV.push(y - yr);
data.vboV.push(z - zr);
data.vboT.push(texBaseX + texUnitX * 2 + texUnitY * 2);
data.vboT.push(texBaseY + texUnitY + texUnitZ);
// 5
data.vboV.push(x - xr);
data.vboV.push(y + yr);
data.vboV.push(z + zr);
data.vboT.push(texBaseX + texUnitX * 2 + texUnitY);
data.vboT.push(texBaseY + texUnitY);
// 6
data.vboV.push(x - xr);
data.vboV.push(y + yr);
data.vboV.push(z - zr);
data.vboT.push(texBaseX + texUnitX * 2 + texUnitY);
data.vboT.push(texBaseY + texUnitY + texUnitZ);
// 7
data.vboV.push(x + xr);
data.vboV.push(y + yr);
data.vboV.push(z + zr);
data.vboT.push(texBaseX + texUnitX + texUnitY);
data.vboT.push(texBaseY + texUnitY);
// 8
data.vboV.push(x + xr);
data.vboV.push(y + yr);
data.vboV.push(z - zr);
data.vboT.push(texBaseX + texUnitX + texUnitY);
data.vboT.push(texBaseY + texUnitY + texUnitZ);
// 9
data.vboV.push(x + xr);
data.vboV.push(y - yr);
data.vboV.push(z + zr);
data.vboT.push(texBaseX + texUnitX);
data.vboT.push(texBaseY + texUnitY);
// 10
data.vboV.push(x + xr);
data.vboV.push(y - yr);
data.vboV.push(z - zr);
data.vboT.push(texBaseX + texUnitX);
data.vboT.push(texBaseY + texUnitY + texUnitZ);
// 11
data.vboV.push(x - xr);
data.vboV.push(y - yr);
data.vboV.push(z - zr);
data.vboT.push(texBaseX);
data.vboT.push(texBaseY + texUnitY + texUnitZ);
// 12
data.vboV.push(x + xr);
data.vboV.push(y + yr);
data.vboV.push(z - zr);
data.vboT.push(texBaseX + texUnitX);
data.vboT.push(texBaseY + texUnitY * 2 + texUnitZ);
// 13
data.vboV.push(x - xr);
data.vboV.push(y + yr);
data.vboV.push(z - zr);
data.vboT.push(texBaseX);
data.vboT.push(texBaseY + texUnitY * 2 + texUnitZ);
let count = 0;
data.indices.push(count * (IDX_PER_CUBE - 0) + 3);
data.indices.push(count * (IDX_PER_CUBE - 0) + 2);
data.indices.push(count * (IDX_PER_CUBE - 0) + 1);
data.indices.push(count * (IDX_PER_CUBE - 0) + 0);
data.indices.push(count * (IDX_PER_CUBE - 0) + 4);
data.indices.push(count * (IDX_PER_CUBE - 0) + 5);
data.indices.push(count * (IDX_PER_CUBE - 0) + 6);
data.indices.push(count * (IDX_PER_CUBE - 0) + 7);
data.indices.push(count * (IDX_PER_CUBE - 0) + 8);
data.indices.push(count * (IDX_PER_CUBE - 0) + 9);
data.indices.push(count * (IDX_PER_CUBE - 0) + 10);
data.indices.push(count * (IDX_PER_CUBE - 0) + 11);
data.indices.push(count * (IDX_PER_CUBE - 0) + 12);
data.indices.push(count * (IDX_PER_CUBE - 0) + 13);
data.vboV.itemSize = 3;
data.vboT.itemSize = 2;
data.vboV2 = [];
for (let xp = xs * xd; xp <= xm * xd; xp += xd) {
for (let yp = ys * yd; yp <= ym * yd; yp += yd) {
for (let zp = zs * zd; zp <= zm * zd; zp += zd) {
data.vboV2.push(xp);
data.vboV2.push(yp);
data.vboV2.push(zp);
}
}
}
data.vboV2.itemSize = 3;
}
var xRot = 0;
var yRot = 0;
var zRot = 0;
function drawScene() {
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
mat4.identity(mvMatrix);
mat4.translate(mvMatrix, [0.0, 0.0, -3 * (_xBlocks + _yBlocks + _zBlocks) / 3.0]);
mat4.rotate(mvMatrix, degToRad(xRot), [1, 0, 0]);
mat4.rotate(mvMatrix, degToRad(yRot), [0, 1, 0]);
//mat4.rotate(mvMatrix, degToRad(zRot), [0, 0, 1]);
gl.activeTexture(gl.TEXTURE0);
gl.bindTexture(gl.TEXTURE_2D, neheTexture);
//gl.uniform1i(shaderProgram.samplerUniform, 0);
gl.bindBuffer(gl.ARRAY_BUFFER, _vertAry);
gl.vertexAttribPointer(shaderProgram.vertexPositionAttribute, _data.vboV.itemSize, gl.FLOAT, false, 0, 0);
gl.bindBuffer(gl.ARRAY_BUFFER, _texAry);
gl.vertexAttribPointer(shaderProgram.textureCoordAttribute, _data.vboT.itemSize, gl.FLOAT, false, 0, 0);
gl.bindBuffer(gl.ARRAY_BUFFER, _posAry);
gl.vertexAttribPointer(shaderProgram.instancePositionAttribute, _data.vboV2.itemSize, gl.FLOAT, false, 0, 0);
gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, _idxAry);
gl.uniformMatrix4fv(shaderProgram.mvMatrixUniform, false, mvMatrix);
//gl.drawElements(gl.TRIANGLE_STRIP, _data.indices.length, gl.UNSIGNED_INT, 0);
ext.drawElementsInstancedANGLE(gl.TRIANGLE_STRIP, _data.indices.length, gl.UNSIGNED_INT, 0, _xBlocks * _yBlocks * _zBlocks);
}
function webGLStart() {
var canvas = document.getElementById("canvas");
initGL(canvas);
initShaders();
initBuffers(_xBlocks, _yBlocks, _zBlocks);
initTexture();
gl.clearColor(0.0, 0.5, 0.0, 1.0);
gl.enable(gl.DEPTH_TEST);
gl.enable(gl.CULL_FACE);
gl.frontFace(gl.CCW);
gl.cullFace(gl.BACK);
gl.viewport(0, 0, gl.viewportWidth, gl.viewportHeight);
mat4.perspective(45, gl.viewportWidth / gl.viewportHeight, 0.1, 1000.0, pMatrix);
gl.uniformMatrix4fv(shaderProgram.pMatrixUniform, false, pMatrix);
ext.vertexAttribDivisorANGLE(shaderProgram.vertexPositionAttribute, 0);
ext.vertexAttribDivisorANGLE(shaderProgram.textureCoordAttribute, 0);
ext.vertexAttribDivisorANGLE(shaderProgram.instancePositionAttribute, 1);
//ext.vertexAttribDivisorANGLE(shaderProgram.instancePositionAttribute, 1);
tick();
}
function tick() {
requestAnimFrame(tick);
drawScene();
animate();
}
var neheTexture;
function initTexture() {
neheTexture = gl.createTexture();
neheTexture.image = new Image();
neheTexture.image.onload = function() {
handleLoadedTexture(neheTexture);
}
neheTexture.image.src = "cube180820.png";
}
function handleLoadedTexture(texture) {
gl.bindTexture(gl.TEXTURE_2D, texture);
//gl.pixelStorei(gl.UNPACK_FLIP_Y_WEBGL, true);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, texture.image);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
gl.bindTexture(gl.TEXTURE_2D, null);
}
var lastTime = 0;
function animate() {
var timeNow = new Date().getTime();
if (lastTime != 0) {
var elapsed = timeNow - lastTime;
xRot += (36 * elapsed) / 1000.0;
yRot += (18 * elapsed) / 1000.0;
//zRot += (10 * elapsed) / 1000.0;
if (updateForFps(elapsed)) {
document.getElementById("fps").innerText = getFpsInfo();
}
}
lastTime = timeNow;
}
var _timeTotal = 0.0;
var _time1Sec = 0.0;
var _time3Sec = 0.0;
var _frameCntTotal = 0;
var _frameCnt1Sec = 0;
var _frameCnt3Sec = 0;
var _preFpsIn1Sec = 0.0;
var _preFpsIn3Sec = 0.0;
function updateForFps(time) {
var bUpdate = false;
_timeTotal += time;
_time1Sec += time;
_time3Sec += time;
_frameCntTotal++;
_frameCnt1Sec++;
_frameCnt3Sec++;
if (1000.0 <= _time1Sec) {
_preFpsIn1Sec = _frameCnt1Sec / _time1Sec ;
_time1Sec = 0;
_frameCnt1Sec = 0;
bUpdate = true;
}
if (3000.0 <= _time3Sec) {
_preFpsIn3Sec = _frameCnt3Sec / _time3Sec ;
_time3Sec = 0;
_frameCnt3Sec = 0;
bUpdate = true;
}
return bUpdate;
}
function getFpsInfo() {
return adjustFps(_preFpsIn1Sec) + "(1s) "
+ adjustFps(_preFpsIn3Sec) + "(3s) "
+ adjustFps(_frameCntTotal / _timeTotal) + "(total)";
}
function adjustFps(value) {
return (value * 1000).toFixed(2);
}
function changeBlocks() {
let newX = parseInt(document.getElementById("blocksX").value);
let newY = parseInt(document.getElementById("blocksY").value);
let newZ = parseInt(document.getElementById("blocksZ").value);
if (isNaN(newX)) { newX = 10; }
if (newX < 1) { newX = 1; }
if (200 < newX) { newX = 200; }
if (isNaN(newY)) { newY = 10; }
if (newY < 1) { newY = 1; }
if (200 < newY) { newY = 200; }
if (isNaN(newZ)) { newZ = 10; }
if (newZ < 1) { newZ = 1; }
if (200 < newZ) { newZ = 200; }
document.getElementById("blocksX").value = newX.toString();
document.getElementById("blocksY").value = newY.toString();
document.getElementById("blocksZ").value = newZ.toString();
if (_xBlocks != newX || _yBlocks != newY || _zBlocks != newZ) {
initBuffers(newX, newY, newZ);
_timeTotal = 0.0;
_time1Sec = 0.0;
_time3Sec = 0.0;
_frameCntTotal = 0;
_frameCnt1Sec = 0;
_frameCnt3Sec = 0;
_preFpsIn1Sec = 0.0;
_preFpsIn3Sec = 0.0;
}
}
</script>
<style type="text/css">
#fps {
position:absolute;
top:10px;
left:20px;
font-size:2em;
color: white;
font-family: Baoli SC;
}
#memory {
position:absolute;
top:675px;
left:20px;
font-size:2em;
color: white;
font-family: Baoli SC;
}
</style>
</head>
<body onload="webGLStart();">
<canvas id="canvas" style="border: none;" width="1200" height="720"></canvas>
<div id="fps">00.0(1s) 00.0(3s) 00.0(total)</div>
<div id="memory"></div>
<br />
<table style="border: 0; padding: 10px;">
<tr>
<td>X: <input type="text" id="blocksX" value="10" />
<td>Y: <input type="text" id="blocksY" value="10" />
<td>Z: <input type="text" id="blocksZ" value="10" />
<td><input type="button" id="apply" value="apply" onclick="changeBlocks();" />(1 - 200)
</table>
</body>
</html>