bill
5 years ago
parent
5158b1105f
commit
312cb4995e
|
Before Width: | Height: | Size: 6.5 KiB |
@ -1,206 +0,0 @@
|
||||
|
||||
//////////////////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
// THIS IS THE SUPPORT LIBRARY. YOU PROBABLY DON'T WANT TO CHANGE ANYTHING HERE JUST YET.
|
||||
//
|
||||
//////////////////////////////////////////////////////////////////////////////////////////
|
||||
|
||||
let fragmentShaderHeader = ['' // WHATEVER CODE WE WANT TO PREDEFINE FOR FRAGMENT SHADERS
|
||||
, 'precision highp float;'
|
||||
, 'float noise(vec3 point) { float r = 0.; for (int i=0;i<16;i++) {'
|
||||
, ' vec3 D, p = point + mod(vec3(i,i/4,i/8) , vec3(4.0,2.0,2.0)) +'
|
||||
, ' 1.7*sin(vec3(i,5*i,8*i)), C=floor(p), P=p-C-.5, A=abs(P);'
|
||||
, ' C += mod(C.x+C.y+C.z,2.) * step(max(A.yzx,A.zxy),A) * sign(P);'
|
||||
, ' D=34.*sin(987.*float(i)+876.*C+76.*C.yzx+765.*C.zxy);P=p-C-.5;'
|
||||
, ' r+=sin(6.3*dot(P,fract(D)-.5))*pow(max(0.,1.-2.*dot(P,P)),4.);'
|
||||
, '} return .5 * sin(r); }'
|
||||
].join('\n');
|
||||
let ns = 5, cns = 3;
|
||||
fragmentShaderHeader+= 'const int ns = ' + ns + ';\n';
|
||||
let fragmentShaderDefs = 'const int cns = ' + cns + ';\n';
|
||||
let nfsh = fragmentShaderHeader.split('\n').length + 1; // NUMBER OF LINES OF CODE IN fragmentShaderHeader
|
||||
|
||||
let isFirefox = navigator.userAgent.indexOf('Firefox') > 0; // IS THIS THE FIREFOX BROWSER?
|
||||
let errorMsg = '';
|
||||
//
|
||||
// Initialize a texture and load an image.
|
||||
// When the image finished loading copy it into the texture.
|
||||
//
|
||||
function getBlob(data) {
|
||||
let bytes = new Array(data.length);
|
||||
for (let i = 0; i < data.length; i++) {
|
||||
bytes[i] = data.charCodeAt(i);
|
||||
}
|
||||
return new Blob([new Uint8Array(bytes)]);
|
||||
}
|
||||
let texture = [], gl, program;
|
||||
let textures = [];
|
||||
let lock = false;
|
||||
function loadTexture(gl, url, i) {
|
||||
const level = 0;
|
||||
const internalFormat = gl.RGBA;
|
||||
const width = 1;
|
||||
const height = 1;
|
||||
const border = 0;
|
||||
const srcFormat = gl.RGBA;
|
||||
const srcType = gl.UNSIGNED_BYTE;
|
||||
if (texture[i] == null)
|
||||
{
|
||||
texture[i] = gl.createTexture();
|
||||
const pixel = new Uint8Array([0, 0, 255, 255]); // opaque blue
|
||||
gl.activeTexture(gl.TEXTURE0+i);
|
||||
gl.bindTexture(gl.TEXTURE_2D, texture[i]);
|
||||
gl.texImage2D(gl.TEXTURE_2D, level, internalFormat,
|
||||
width, height, border, srcFormat, srcType,
|
||||
pixel);
|
||||
}
|
||||
// Because images have to be downloaded over the internet
|
||||
// they might take a moment until they are ready.
|
||||
// Until then put a single pixel in the texture so we can
|
||||
// use it immediately. When the image has finished downloading
|
||||
// we'll update the texture with the contents of the image.
|
||||
|
||||
const image = new Image();
|
||||
image.onload = function () {
|
||||
gl.activeTexture(gl.TEXTURE0+i);
|
||||
gl.bindTexture(gl.TEXTURE_2D, texture[i]);
|
||||
gl.texImage2D(gl.TEXTURE_2D, level, internalFormat,
|
||||
srcFormat, srcType, image);
|
||||
|
||||
// WebGL1 has different requirements for power of 2 images
|
||||
// vs non power of 2 images so check if the image is a
|
||||
// power of 2 in both dimensions.
|
||||
if (isPowerOf2(image.width) && isPowerOf2(image.height)) {
|
||||
// Yes, it's a power of 2. Generate mips.
|
||||
gl.generateMipmap(gl.TEXTURE_2D);
|
||||
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR_MIPMAP_LINEAR);
|
||||
} else {
|
||||
// No, it's not a power of 2. Turn off mips and set
|
||||
// wrapping to clamp to edge
|
||||
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
|
||||
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
|
||||
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
|
||||
}
|
||||
};
|
||||
image.src = url;
|
||||
}
|
||||
|
||||
function isPowerOf2(value) {
|
||||
return (value & (value - 1)) == 0;
|
||||
}
|
||||
function gl_start(canvas, vertexShader, fragmentShader) { // START WEBGL RUNNING IN A CANVAS
|
||||
|
||||
setTimeout(function () {
|
||||
try {
|
||||
canvas.gl = canvas.getContext('experimental-webgl'); // Make sure WebGl is supported. IT WOULD BE GREAT TO USE WEBGL2 INSTEAD.
|
||||
} catch (e) { throw 'Sorry, your browser does not support WebGL.'; }
|
||||
|
||||
canvas.setShaders = function (vertexShader, fragmentShader) { // Add the vertex and fragment shaders:
|
||||
|
||||
gl = this.gl;
|
||||
program = gl.createProgram(); // Create the WebGL program.
|
||||
|
||||
function addshader(type, src) { // Create and attach a WebGL shader.
|
||||
function spacer(color, width, height) {
|
||||
return '<table bgcolor=' + color +
|
||||
' width=' + width +
|
||||
' height=' + height + '><tr><td> </td></tr></table>';
|
||||
}
|
||||
errorMessage.innerHTML = '<br>';
|
||||
// errorMarker.innerHTML = spacer('white', 1, 1) + '<font size=1 color=white>\u25B6</font>';
|
||||
let shader = gl.createShader(type);
|
||||
gl.shaderSource(shader, src);
|
||||
gl.compileShader(shader);
|
||||
if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {
|
||||
let msg = gl.getShaderInfoLog(shader);
|
||||
console.log('Cannot compile shader:\n\n' + msg);
|
||||
|
||||
let a = msg.substring(6, msg.length);
|
||||
let line = 0;
|
||||
if (a.substring(0, 3) == ' 0:') {
|
||||
a = a.substring(3, a.length);
|
||||
line = parseInt(a) - nfsh;
|
||||
|
||||
editor.session.setAnnotations([{
|
||||
row: line,
|
||||
column: 0,
|
||||
text: msg,
|
||||
type: "error"
|
||||
}]);
|
||||
}
|
||||
let j = a.indexOf(':');
|
||||
a = 'line ' + (line+1) + a.substring(j, a.length);
|
||||
if ((j = a.indexOf('\n')) > 0)
|
||||
a = a.substring(0, j);
|
||||
errorMessage.innerHTML = a;
|
||||
}
|
||||
else
|
||||
editor.session.clearAnnotations();
|
||||
gl.attachShader(program, shader);
|
||||
};
|
||||
|
||||
addshader(gl.VERTEX_SHADER, vertexShader); // Add the vertex and fragment shaders.
|
||||
addshader(gl.FRAGMENT_SHADER, fragmentShaderHeader +fragmentShaderDefs+ fragmentShader);
|
||||
|
||||
gl.linkProgram(program); // Link the program, report any errors.
|
||||
if (!gl.getProgramParameter(program, gl.LINK_STATUS))
|
||||
console.log('Could not link the shader program!');
|
||||
gl.useProgram(program);
|
||||
gl.program = program;
|
||||
for(let i = 0; i < ns; ++i){
|
||||
loadTexture(gl, './'+(i+1)+'.jpg', i); //Texture loading.
|
||||
textures[i] = i;
|
||||
}
|
||||
gl.uniform1iv(gl.getUniformLocation(program, 'uSampler'), textures);
|
||||
let cx = Math.cos(mousedx), cy = Math.cos(mousedy), sx = Math.sin(mousedx), sy = Math.sin(mousedy);
|
||||
setUniform('Matrix3fv', 'transformation', false, [cx, sy*sx, sx*cy, 0, cy, -sy, -sx, cx*sy, cx*cy]);
|
||||
let attribs = [
|
||||
.05,.05,.1, .5,.5,1., 1.,.5,.5,20., 0., .0, 1.3,
|
||||
.1,.05,.05, 1.,.5,.5, 1.,.5,.5,10., .2,0.8,1.3,
|
||||
.1,.05,.05, .71,.71,.71, .71,.71,.71,10., 0.3,.0,1.5,
|
||||
.1,.1,.1, .71,.71,.71, .71,.71,.71,10., 0.05,0., 1.
|
||||
]
|
||||
var offset = 0;
|
||||
for(let i = 0; i < ns-1; i++){
|
||||
setUniform('3fv', 'Ambient['+i+']', attribs.slice(offset, offset += 3));
|
||||
setUniform('3fv', 'Diffuse['+i+']', attribs.slice(offset, offset += 3));
|
||||
setUniform('4fv', 'Specular['+i+']', attribs.slice(offset, offset += 4));
|
||||
setUniform('1fv', 'ks['+i+']', attribs.slice(offset, offset += 1));
|
||||
setUniform('1fv', 'kr['+i+']', attribs.slice(offset, offset += 1));
|
||||
setUniform('1fv', 'kf['+i+']', attribs.slice(offset, offset += 1));
|
||||
}
|
||||
|
||||
|
||||
gl.bindBuffer(gl.ARRAY_BUFFER, gl.createBuffer()); // Create a square as a triangle strip
|
||||
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array( // consisting of two triangles.
|
||||
[-1, 1, 0, 1, 1, 0, -1, -1, 0, 1, -1, 0]), gl.STATIC_DRAW);
|
||||
|
||||
let aPos = gl.getAttribLocation(program, 'aPos'); // Set aPos attribute for each vertex.
|
||||
gl.enableVertexAttribArray(aPos);
|
||||
gl.vertexAttribPointer(aPos, 3, gl.FLOAT, false, 0, 0);
|
||||
}
|
||||
|
||||
canvas.setShaders(vertexShader, fragmentShader); // Initialize everything,
|
||||
setInterval(function () { // Start the animation loop.
|
||||
gl = canvas.gl;
|
||||
if (gl.startTime === undefined) // First time through,
|
||||
gl.startTime = Date.now(); // record the start time.
|
||||
animate(gl);
|
||||
gl.drawArrays(gl.TRIANGLE_STRIP, 0, 4); // Render the square.
|
||||
}, 30);
|
||||
|
||||
}, 100); // Wait 100 milliseconds after page has loaded before starting WebGL.
|
||||
}
|
||||
|
||||
// THE animate() CALLBACK FUNCTION CAN BE REDEFINED IN index.html.
|
||||
|
||||
function animate() { }
|
||||
|
||||
function setUniform(type, name, a, b, c, d, e, f) {
|
||||
if(gl)
|
||||
{
|
||||
let loc = gl.getUniformLocation(gl.program, name);
|
||||
(gl['uniform' + type])(loc, a, b, c, d, e, f);
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in new issue