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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>html5+canvas烂漫空中散落的花瓣3D相册动画特效</title><meta name="description" content="Change OR Die" /><script src="js/jquery.min.js"></script><link type="text/css" href="./css/style.css" rel="stylesheet" /><style type="text/css">* {margin: 0;padding: 0;list-style-type: none;}a,img {border: 0;}body {font: 12px/180% Arial, Helvetica, sans-serif, "新宋体";}/* 相册css */html,body {width: 100%;height: 100%;margin: 0;padding: 0;overflow: hidden;}</style></head><body><audio src="music/4.mp3" autoplay="autoplay" loop="loop"></audio><canvas id="sakura"></canvas><div class="box"><ul class="minbox"><li></li><li></li><li></li><li></li><li></li><li></li></ul><ol class="maxbox"><li></li><li></li><li></li><li></li><li></li><li></li></ol></div><!-- sakura shader --><script id="sakura_point_vsh" type="x-shader/x_vertex">uniform mat4 uProjection;uniform mat4 uModelview;uniform vec3 uResolution;uniform vec3 uOffset;uniform vec3 uDOF; //x:focus distance, y:focus radius, z:max radiusuniform vec3 uFade; //x:start distance, y:half distance, z:near fade startattribute vec3 aPosition;attribute vec3 aEuler;attribute vec2 aMisc; //x:size, y:fadevarying vec3 pposition;varying float psize;varying float palpha;varying float pdist;//varying mat3 rotMat;varying vec3 normX;varying vec3 normY;varying vec3 normZ;varying vec3 normal;varying float diffuse;varying float specular;varying float rstop;varying float distancefade;void main(void) {// Projection is based on vertical anglevec4 pos = uModelview * vec4(aPosition + uOffset, 1.0);gl_Position = uProjection * pos;gl_PointSize = aMisc.x * uProjection[1][1] / -pos.z * uResolution.y * 0.5;pposition = pos.xyz;psize = aMisc.x;pdist = length(pos.xyz);palpha = smoothstep(0.0, 1.0, (pdist - 0.1) / uFade.z);vec3 elrsn = sin(aEuler);vec3 elrcs = cos(aEuler);mat3 rotx = mat3(1.0, 0.0, 0.0,0.0, elrcs.x, elrsn.x,0.0, -elrsn.x, elrcs.x);mat3 roty = mat3(elrcs.y, 0.0, -elrsn.y,0.0, 1.0, 0.0,elrsn.y, 0.0, elrcs.y);mat3 rotz = mat3(elrcs.z, elrsn.z, 0.0,-elrsn.z, elrcs.z, 0.0,0.0, 0.0, 1.0);mat3 rotmat = rotx * roty * rotz;normal = rotmat[2];mat3 trrotm = mat3(rotmat[0][0], rotmat[1][0], rotmat[2][0],rotmat[0][1], rotmat[1][1], rotmat[2][1],rotmat[0][2], rotmat[1][2], rotmat[2][2]);normX = trrotm[0];normY = trrotm[1];normZ = trrotm[2];const vec3 lit = vec3(0.6917144638660746, 0.6917144638660746, -0.20751433915982237);float tmpdfs = dot(lit, normal);if(tmpdfs < 0.0) {normal = -normal;tmpdfs = dot(lit, normal);}diffuse = 0.4 + tmpdfs;vec3 eyev = normalize(-pos.xyz);if(dot(eyev, normal) > 0.0) {vec3 hv = normalize(eyev + lit);specular = pow(max(dot(hv, normal), 0.0), 20.0);}else {specular = 0.0;}rstop = clamp((abs(pdist - uDOF.x) - uDOF.y) / uDOF.z, 0.0, 1.0);rstop = pow(rstop, 0.5);//-0.69315 = ln(0.5)distancefade = min(1.0, exp((uFade.x - pdist) * 0.69315 / uFade.y));}</script><script id="sakura_point_fsh" type="x-shader/x_fragment">#ifdef GL_ES//precision mediump float;precision highp float;#endifuniform vec3 uDOF; //x:focus distance, y:focus radius, z:max radiusuniform vec3 uFade; //x:start distance, y:half distance, z:near fade startconst vec3 fadeCol = vec3(0.08, 0.03, 0.06);varying vec3 pposition;varying float psize;varying float palpha;varying float pdist;//varying mat3 rotMat;varying vec3 normX;varying vec3 normY;varying vec3 normZ;varying vec3 normal;varying float diffuse;varying float specular;varying float rstop;varying float distancefade;float ellipse(vec2 p, vec2 o, vec2 r) {vec2 lp = (p - o) / r;return length(lp) - 1.0;}void main(void) {vec3 p = vec3(gl_PointCoord - vec2(0.5, 0.5), 0.0) * 2.0;vec3 d = vec3(0.0, 0.0, -1.0);float nd = normZ.z; //dot(-normZ, d);if(abs(nd) < 0.0001) discard;float np = dot(normZ, p);vec3 tp = p + d * np / nd;vec2 coord = vec2(dot(normX, tp), dot(normY, tp));//angle = 15 degreeconst float flwrsn = 0.258819045102521;const float flwrcs = 0.965925826289068;mat2 flwrm = mat2(flwrcs, -flwrsn, flwrsn, flwrcs);vec2 flwrp = vec2(abs(coord.x), coord.y) * flwrm;void main(void) {vec4 srccol = texture2D(uSrc, texCoord) * 2.0;vec4 bloomcol = texture2D(uBloom, texCoord);vec4 col;col = srccol + bloomcol * (vec4(1.0) + srccol);col *= smoothstep(1.0, 0.0, pow(length((texCoord - vec2(0.5)) * 2.0), 1.2) * 0.5);col = pow(col, vec4(0.45454545454545)); //(1.0 / 2.2)gl_FragColor = vec4(col.rgb, 1.0);gl_FragColor.a = 1.0;}</script><script src="js/index.js"></script></body>
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