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<!-- saved from url=(0032)https://cznull.github.io/parasur -->
<html lang="en"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta name="viewport" content="user-scalable=no">
<title>parasur</title>
<style>
body {
}
.sr {
width: 400px;
}
#c1 {
background: #fbf7fe;
}
#btn {
position: fixed;
left: 0px;
top: 0px;
}
#c1 {
}
#config {
position: fixed;
left: 0px;
top: 30px;
display: inline;
}
</style>
</head>
<body style="overflow-x:hidden;overflow-y:hidden">
<canvas id="c1" width="2048" height="1042">
<span>不支持canvas浏览器</span>
</canvas>
<div>
<input type="range" id="zoom" class="sr" value="0" min="-1" max="1" step="0.001">
</div>
<script>
var cx, cy;
var canvas;
var gl, glview, glproject;
var md = 0,mx,my;
var mx = 0, my = 0, mx1 = 0, my1 = 0, lasttimen = 0;
var ml = 0, mr = 0, mm = 0;
var len = 1.5;
var ang1 = 0.0;
var ang2 = 0.0;
var cenx = 0.0;
var ceny = 0.0;
var cenz = 0.0;
var vbuffer=[], cbuffer=[], nbuffer=[];
var points = [];
var MapSize =1048580;
var noqi = 32;
var Noq = 4096;
var coslim = 1.0 - 1.0 / 16, aculim = 0.001;
var quaMap = Array();
var Mapbot = Array();
var Maprig = Array();
var Maptop = Array();
var Maplef = Array();
var Mapfat = Array();
var qual = Array();
var quau = Array();
var quav = Array();
var end = 0;
var s =
"getv = function (u,v){\n" +
" u=u*2-1;v=v*2-1;\n" +
" return {\n" +
" \"x\":u,\n" +
" \"y\":v,\n" +
" \"z\":cos((u*u - v * v)*6.2832 * 10)\n" +
" };\n" +
"};\n"+
"MapSize = 4194304;\n" +
"noqi = 32;\n" +
"Noq = 8192;\n" +
"coslim = 1.0 - 1.0 / 12;\n" +
"aculim = 0.001;\n"+
"clear();\n";
cos = Math.cos;
sin = Math.sin;
sqrt = Math.sqrt;
max = Math.max;
min = Math.min;
abs = Math.abs;
var vbuffer, nbuffer, cbuffer;
function ontimer() {
draw();
window.requestAnimationFrame(ontimer);
}
canvas=document.getElementById('c1');
window.onload = function () {
cx = 1280;
cy = 720;
document.getElementById("c1").setAttribute("width", cx);
document.getElementById("c1").setAttribute("height", cy);
var VSHADER_SOURCE =
"#version 100 \n" +
"precision highp float;\n" +
"attribute vec3 vertex,normal,color;" +
"varying vec4 fc;" +
"varying vec4 a;" +
"float l;" +
"varying vec4 ntemp;" +
"uniform mat4 view,project;" +
"void main() {" +
" ntemp=vec4(normal,0.0);" +
" ntemp = view * ntemp;" +
" a=vec4(vertex,1.0);" +
" a = view* a;" +
" fc = vec4(color,1.0);" +
" gl_Position = project*a;" +
"}";
var FSHADER_SOURCE =
"#version 100 \n" +
"precision highp float;\n" +
"varying vec4 fc;" +
"float s,t,u;" +
"vec3 texdir;" +
"varying vec4 a;" +
"vec3 b,c;" +
"varying vec4 ntemp;" +
"void main(){" +
" b=vec3(a);" +
" b=normalize(b);" +
" c=vec3(ntemp);" +
" c=normalize(c);" +
" c=(gl_FrontFacing)?c:-c;" +
" texdir=reflect(b,c);" +
" s=texdir.x*0.276+texdir.y*0.920+texdir.z*0.276;" +
" t=c.x*0.276+c.y*0.920+c.z*0.276;" +
" t=0.5*t+0.46875*sqrt(t*t+0.137778);" +
" s=(s>0.0)?s:0.0;" +
" s=pow(s,4.0);" +
" s=s*0.54+t*0.40+0.05;" +
" s=pow(s,0.5);" +
" gl_FragColor.r = fc.r*s;" +
" gl_FragColor.g = fc.g*s;" +
" gl_FragColor.b = fc.b*s;" +
" gl_FragColor.a = 1.0;" +
"}";
gl = canvas.getContext('webgl');
gl.enable(gl.DEPTH_TEST);
vertshader = gl.createShader(gl.VERTEX_SHADER);
fragshader = gl.createShader(gl.FRAGMENT_SHADER);
shaderProgram = gl.createProgram();
gl.shaderSource(vertshader, VSHADER_SOURCE);
gl.compileShader(vertshader);
var infov = gl.getShaderInfoLog(vertshader);
gl.shaderSource(fragshader, FSHADER_SOURCE);
gl.compileShader(fragshader);
var infof = gl.getShaderInfoLog(fragshader);
gl.attachShader(shaderProgram, vertshader);
gl.attachShader(shaderProgram, fragshader);
gl.linkProgram(shaderProgram);
gl.useProgram(shaderProgram);
if (!gl.getProgramParameter(shaderProgram, gl.LINK_STATUS)) {
var info = gl.getProgramInfoLog(shaderProgram);
alert('Could not compile WebGL program. \n\n' + infov + infof + info);
}
glvertex = gl.getAttribLocation(shaderProgram, 'vertex');
glnormal = gl.getAttribLocation(shaderProgram, 'normal');
glcolor = gl.getAttribLocation(shaderProgram, 'color');
glview = gl.getUniformLocation(shaderProgram, 'view');
glproject = gl.getUniformLocation(shaderProgram, 'project');
gl.enableVertexAttribArray(glvertex);
gl.enableVertexAttribArray(glnormal);
gl.enableVertexAttribArray(glcolor);
vbuffer = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, vbuffer);
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([
0, sqrt(3) / 2, 0,
sqrt(0.5), sqrt(3) / 6, sqrt(1 / 6),
sqrt(0.5), -sqrt(3) / 6, -sqrt(1 / 6),
0, sqrt(3) / 2, 0,
sqrt(0.5), -sqrt(3) / 6, -sqrt(1 / 6),
0, sqrt(3) / 6, -sqrt(2 / 3),
0, sqrt(3) / 2, 0,
-sqrt(0.5), -sqrt(3) / 6, -sqrt(1 / 6),
-sqrt(0.5), sqrt(3) / 6, sqrt(1 / 6),
0, sqrt(3) / 2, 0,
0, sqrt(3) / 6, -sqrt(2 / 3),
-sqrt(0.5), -sqrt(3) / 6, -sqrt(1 / 6),
0, sqrt(3) / 2, 0,
-sqrt(0.5), sqrt(3) / 6, sqrt(1 / 6),
0, -sqrt(3) / 6, sqrt(2 / 3),
0, sqrt(3) / 2, 0,
0, -sqrt(3) / 6, sqrt(2 / 3),
sqrt(0.5), sqrt(3) / 6, sqrt(1 / 6),
0, -sqrt(3) / 2, 0,
sqrt(0.5), -sqrt(3) / 6, -sqrt(1 / 6),
sqrt(0.5), sqrt(3) / 6, sqrt(1 / 6),
0, -sqrt(3) / 2, 0,
sqrt(0.5), sqrt(3) / 6, sqrt(1 / 6),
0, -sqrt(3) / 6, sqrt(2 / 3),
0, -sqrt(3) / 2, 0,
-sqrt(0.5), sqrt(3) / 6, sqrt(1 / 6),
-sqrt(0.5), -sqrt(3) / 6, -sqrt(1 / 6),
0, -sqrt(3) / 2, 0,
0, -sqrt(3) / 6, sqrt(2 / 3),
-sqrt(0.5), sqrt(3) / 6, sqrt(1 / 6),
0, -sqrt(3) / 2, 0,
-sqrt(0.5), -sqrt(3) / 6, -sqrt(1 / 6),
0, sqrt(3) / 6, -sqrt(2 / 3),
0, -sqrt(3) / 2, 0,
0, sqrt(3) / 6, -sqrt(2 / 3),
sqrt(0.5), -sqrt(3) / 6, -sqrt(1 / 6),
]), gl.STATIC_DRAW);
cbuffer = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, cbuffer);
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([
sqrt(0.5), sqrt(3) / 3, -sqrt(1 / 6),
sqrt(0.5), sqrt(3) / 3, -sqrt(1 / 6),
sqrt(0.5), sqrt(3) / 3, -sqrt(1 / 6),
sqrt(0.5), sqrt(3) / 3, -sqrt(1 / 6),
sqrt(0.5), sqrt(3) / 3, -sqrt(1 / 6),
sqrt(0.5), sqrt(3) / 3, -sqrt(1 / 6),
-sqrt(0.5), sqrt(3) / 3, -sqrt(1 / 6),
-sqrt(0.5), sqrt(3) / 3, -sqrt(1 / 6),
-sqrt(0.5), sqrt(3) / 3, -sqrt(1 / 6),
-sqrt(0.5), sqrt(3) / 3, -sqrt(1 / 6),
-sqrt(0.5), sqrt(3) / 3, -sqrt(1 / 6),
-sqrt(0.5), sqrt(3) / 3, -sqrt(1 / 6),
0, sqrt(3) / 3, sqrt(2 / 3),
0, sqrt(3) / 3, sqrt(2 / 3),
0, sqrt(3) / 3, sqrt(2 / 3),
0, sqrt(3) / 3, sqrt(2 / 3),
0, sqrt(3) / 3, sqrt(2 / 3),
0, sqrt(3) / 3, sqrt(2 / 3),
sqrt(0.5), -sqrt(3) / 3, sqrt(1 / 6),
sqrt(0.5), -sqrt(3) / 3, sqrt(1 / 6),
sqrt(0.5), -sqrt(3) / 3, sqrt(1 / 6),
sqrt(0.5), -sqrt(3) / 3, sqrt(1 / 6),
sqrt(0.5), -sqrt(3) / 3, sqrt(1 / 6),
sqrt(0.5), -sqrt(3) / 3, sqrt(1 / 6),
-sqrt(0.5), -sqrt(3) / 3, sqrt(1 / 6),
-sqrt(0.5), -sqrt(3) / 3, sqrt(1 / 6),
-sqrt(0.5), -sqrt(3) / 3, sqrt(1 / 6),
-sqrt(0.5), -sqrt(3) / 3, sqrt(1 / 6),
-sqrt(0.5), -sqrt(3) / 3, sqrt(1 / 6),
-sqrt(0.5), -sqrt(3) / 3, sqrt(1 / 6),
0, -sqrt(3) / 3, -sqrt(2 / 3),
0, -sqrt(3) / 3, -sqrt(2 / 3),
0, -sqrt(3) / 3, -sqrt(2 / 3),
0, -sqrt(3) / 3, -sqrt(2 / 3),
0, -sqrt(3) / 3, -sqrt(2 / 3),
0, -sqrt(3) / 3, -sqrt(2 / 3),
]), gl.STATIC_DRAW);
nbuffer = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, nbuffer);
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([
sqrt(0.5), sqrt(3) / 3, sqrt(1 / 6),
sqrt(0.5), sqrt(3) / 3, sqrt(1 / 6),
sqrt(0.5), sqrt(3) / 3, sqrt(1 / 6),
sqrt(0.5), sqrt(3) / 3, sqrt(1 / 6),
sqrt(0.5), sqrt(3) / 3, sqrt(1 / 6),
sqrt(0.5), sqrt(3) / 3, sqrt(1 / 6),
sqrt(0.5), sqrt(3) / 3, sqrt(1 / 6),
sqrt(0.5), sqrt(3) / 3, sqrt(1 / 6),
sqrt(0.5), sqrt(3) / 3, sqrt(1 / 6),
sqrt(0.5), sqrt(3) / 3, sqrt(1 / 6),
sqrt(0.5), sqrt(3) / 3, sqrt(1 / 6),
sqrt(0.5), sqrt(3) / 3, sqrt(1 / 6),
0, sqrt(3) / 3, sqrt(2 / 3),
0, sqrt(3) / 3, sqrt(2 / 3),
0, sqrt(3) / 3, sqrt(2 / 3),
0, sqrt(3) / 3, sqrt(2 / 3),
0, sqrt(3) / 3, sqrt(2 / 3),
0, sqrt(3) / 3, sqrt(2 / 3),
sqrt(0.5), sqrt(3) / 3, sqrt(1 / 6),
sqrt(0.5), sqrt(3) / 3, sqrt(1 / 6),
sqrt(0.5), sqrt(3) / 3, sqrt(1 / 6),
sqrt(0.5), sqrt(3) / 3, sqrt(1 / 6),
sqrt(0.5), sqrt(3) / 3, sqrt(1 / 6),
sqrt(0.5), sqrt(3) / 3, sqrt(1 / 6),
sqrt(0.5), sqrt(3) / 3, sqrt(1 / 6),
sqrt(0.5), sqrt(3) / 3, sqrt(1 / 6),
sqrt(0.5), sqrt(3) / 3, sqrt(1 / 6),
sqrt(0.5), sqrt(3) / 3, sqrt(1 / 6),
sqrt(0.5), sqrt(3) / 3, sqrt(1 / 6),
sqrt(0.5), sqrt(3) / 3, sqrt(1 / 6),
0, sqrt(3) / 3, sqrt(2 / 3),
0, sqrt(3) / 3, sqrt(2 / 3),
0, sqrt(3) / 3, sqrt(2 / 3),
0, sqrt(3) / 3, sqrt(2 / 3),
0, sqrt(3) / 3, sqrt(2 / 3),
0, sqrt(3) / 3, sqrt(2 / 3),
]), gl.STATIC_DRAW);
gl.viewport(0, 0, cx, cy);
window.requestAnimationFrame(ontimer);
}
var pixelscale = 1.0;
function draw() {
if (document.getElementById('zoom').value) {
var s = Math.exp(0.02 * document.getElementById('zoom').value);
pixelscale = pixelscale * s;
}
gl.bindBuffer(gl.ARRAY_BUFFER, vbuffer);
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([
0, pixelscale *sqrt(3) / 2, 0,
sqrt(0.5), pixelscale *sqrt(3) / 6, sqrt(1 / 6),
sqrt(0.5), -pixelscale *sqrt(3) / 6, -sqrt(1 / 6),
0, pixelscale *sqrt(3) / 2, 0,
sqrt(0.5), -pixelscale *sqrt(3) / 6, -sqrt(1 / 6),
0, pixelscale * sqrt(3) / 6, -sqrt(2 / 3),
0, pixelscale * sqrt(3) / 2, 0,
-sqrt(0.5), -pixelscale *sqrt(3) / 6, -sqrt(1 / 6),
-sqrt(0.5), pixelscale *sqrt(3) / 6, sqrt(1 / 6),
0, pixelscale *sqrt(3) / 2, 0,
0, pixelscale * sqrt(3) / 6, -sqrt(2 / 3),
-sqrt(0.5), -pixelscale *sqrt(3) / 6, -sqrt(1 / 6),
0, pixelscale *sqrt(3) / 2, 0,
-sqrt(0.5), pixelscale *sqrt(3) / 6, sqrt(1 / 6),
0, -pixelscale *sqrt(3) / 6, sqrt(2 / 3),
0, pixelscale *sqrt(3) / 2, 0,
0, -pixelscale *sqrt(3) / 6, sqrt(2 / 3),
sqrt(0.5), pixelscale *sqrt(3) / 6, sqrt(1 / 6),
0, -pixelscale *sqrt(3) / 2, 0,
sqrt(0.5), -pixelscale *sqrt(3) / 6, -sqrt(1 / 6),
sqrt(0.5), pixelscale *sqrt(3) / 6, sqrt(1 / 6),
0, -pixelscale *sqrt(3) / 2, 0,
sqrt(0.5), pixelscale *sqrt(3) / 6, sqrt(1 / 6),
0, -pixelscale *sqrt(3) / 6, sqrt(2 / 3),
0, -pixelscale *sqrt(3) / 2, 0,
-sqrt(0.5), pixelscale *sqrt(3) / 6, sqrt(1 / 6),
-sqrt(0.5), -pixelscale *sqrt(3) / 6, -sqrt(1 / 6),
0, -pixelscale *sqrt(3) / 2, 0,
0, -pixelscale *sqrt(3) / 6, sqrt(2 / 3),
-sqrt(0.5), pixelscale *sqrt(3) / 6, sqrt(1 / 6),
0, -pixelscale *sqrt(3) / 2, 0,
-sqrt(0.5), -pixelscale *sqrt(3) / 6, -sqrt(1 / 6),
0, pixelscale *sqrt(3) / 6, -sqrt(2 / 3),
0, -pixelscale *sqrt(3) / 2, 0,
0, pixelscale *sqrt(3) / 6, -sqrt(2 / 3),
sqrt(0.5), -pixelscale *sqrt(3) / 6, -sqrt(1 / 6),
]), gl.STATIC_DRAW);
mat = Array(16);
mat[0] = cos(ang1);
mat[1] = sin(ang1) * sin(ang2);
mat[2] = -sin(ang1) * cos(ang2);
mat[3] = 0.0;
mat[4] = 0.0;
mat[5] = cos(ang2);
mat[6] = sin(ang2);
mat[7] = 0.0;
mat[8] = sin(ang1);
mat[9] = -cos(ang1) * sin(ang2);
mat[10] = cos(ang1) * cos(ang2);
mat[11] = 0.0;
mat[12] = -cenx * mat[0] - ceny * mat[4] - cenz * mat[8];
mat[13] = -cenx * mat[1] - ceny * mat[5] - cenz * mat[9];
mat[14] = -len - cenx * mat[2] - ceny * mat[6] - cenz * mat[10];
mat[15] = 1.0;
gl.uniformMatrix4fv(glview, false, new Float32Array(mat));
var near = 0.01 * len;
var far = 10.0 * len;
mat[0] = (cx + cy) / cx / 2.0;
mat[1] = 0.0;
mat[2] = 0.0;
mat[3] = 0.0;
mat[4] = 0.0;
mat[5] = (cx + cy) / cy / 2.0;;
mat[6] = 0.0;
mat[7] = 0.0;
mat[8] = 0.0;
mat[9] = 0.0;
mat[10] = -(near + far) / (far - near);
mat[11] = -1.0;
mat[12] = 0.0;
mat[13] = 0.0;
mat[14] = -near * far * 2.0 / (far - near);
mat[15] = 0.0;
gl.uniformMatrix4fv(glproject, false, new Float32Array(mat));
gl.bindBuffer(gl.ARRAY_BUFFER, vbuffer);
gl.vertexAttribPointer(glvertex, 3, gl.FLOAT, false, 0, 0);
gl.bindBuffer(gl.ARRAY_BUFFER, nbuffer);
gl.vertexAttribPointer(glnormal, 3, gl.FLOAT, false, 0, 0);
gl.bindBuffer(gl.ARRAY_BUFFER, cbuffer);
gl.vertexAttribPointer(glcolor, 3, gl.FLOAT, false, 0, 0);
gl.drawArrays(gl.TRIANGLES, 0, 36);
//gl.finish();
}
canvas.addEventListener("mousedown",
function (ev) {
var oEvent = ev || event;
if (oEvent.button == 0) {
ml = 1;
mm = 0;
}
if (oEvent.button == 2) {
mr = 1;
mm = 0;
}
mx = oEvent.clientX;
my = oEvent.clientY;
},
false);
canvas.addEventListener("mouseup",
function (ev) {
var oEvent = ev || event;
if (oEvent.button == 0) {
ml = 0;
}
if (oEvent.button == 2) {
mr = 0;
}
},
false);
canvas.addEventListener("mousemove",
function (ev) {
var oEvent = ev || event;
if (ml == 1) {
ang1 += (oEvent.clientX - mx) * 0.002;
ang2 += (oEvent.clientY - my) * 0.002;
if (oEvent.clientX != mx || oEvent.clientY != my) {
mm = 1;
}
}
if (mr == 1) {
var l = len * 4.0 / (cx + cy);
cenx += l * (-(oEvent.clientX - mx) * Math.cos(ang1) + (oEvent.clientY - my) * Math.sin(ang2) * Math.sin(ang1));
ceny += l * ((oEvent.clientY - my) * Math.cos(ang2));
cenz += l * (-(oEvent.clientX - mx) * Math.sin(ang1) - (oEvent.clientY - my) * Math.sin(ang2) * Math.cos(ang1));
if (oEvent.clientX != mx || oEvent.clientY != my) {
mm = 1;
}
}
mx = oEvent.clientX;
my = oEvent.clientY;
},
false);
canvas.addEventListener("mousewheel",
function (ev) {
ev.preventDefault();
var oEvent = ev || event;
len *= Math.exp(-0.001 * oEvent.wheelDelta);
},
false);
canvas.addEventListener("touchstart",
function (ev) {
var n = ev.touches.length;
if (n == 1) {
var oEvent = ev.touches[0];
mx = oEvent.clientX;
my = oEvent.clientY;
}
else if (n == 2) {
var oEvent = ev.touches[0];
mx = oEvent.clientX;
my = oEvent.clientY;
oEvent = ev.touches[1];
mx1 = oEvent.clientX;
my1 = oEvent.clientY;
}
lasttimen = n;
},
false);
canvas.addEventListener("touchend",
function (ev) {
var n = ev.touches.length;
if (n == 1) {
var oEvent = ev.touches[0];
mx = oEvent.clientX;
my = oEvent.clientY;
}
else if (n == 2) {
var oEvent = ev.touches[0];
mx = oEvent.clientX;
my = oEvent.clientY;
oEvent = ev.touches[1];
mx1 = oEvent.clientX;
my1 = oEvent.clientY;
}
lasttimen = n;
},
false);
canvas.addEventListener("touchmove",
function (ev) {
ev.preventDefault();
var n = ev.touches.length;
if (n == 1 && lasttimen == 1) {
var oEvent = ev.touches[0];
ang1 += (oEvent.clientX - mx) * 0.002;
ang2 += (oEvent.clientY - my) * 0.002;
mx = oEvent.clientX;
my = oEvent.clientY;
}
else if (n == 2) {
var oEvent = ev.touches[0];
var oEvent1 = ev.touches[1];
var l = len * 2.0 / (cx + cy), l1;
cenx += l * (-(oEvent.clientX + oEvent1.clientX - mx - mx1) * Math.cos(ang1) + (oEvent.clientY + oEvent1.clientY - my - my1) * Math.sin(ang2) * Math.sin(ang1));
ceny += l * ((oEvent.clientY + oEvent1.clientY - my - my1) * Math.cos(ang2));
cenz += l * (-(oEvent.clientX + oEvent1.clientX - mx - mx1) * Math.sin(ang1) - (oEvent.clientY + oEvent1.clientY - my - my1) * Math.sin(ang2) * Math.cos(ang1));
l1 = Math.sqrt((mx - mx1) * (mx - mx1) + (my - my1) * (my - my1) + 1.0);
mx = oEvent.clientX;
my = oEvent.clientY;
mx1 = oEvent1.clientX;
my1 = oEvent1.clientY;
l = Math.sqrt((mx - mx1) * (mx - mx1) + (my - my1) * (my - my1) + 1.0);
len *= l1 / l;
}
lasttimen = n;
},
false);
canvas.oncontextmenu = function (event) {
if (mm == 1) {
event.preventDefault();
}
};
document.getElementById("zoom").addEventListener("change",
function () {
this.value = 0;
}
);
</script>
</body></html>