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This article mainly shows you "HTML how to achieve dynamic flower background", the content is easy to understand, clear, hope to help you solve doubts, the following let the editor lead you to study and learn "HTML how to achieve dynamic flower background" this article.

Dynamic loose flower background * {margin:0;padding:0;list-style-type:none;} a dint IMG {border:0;} body {font:12px/180% Arial, Helvetica, sans-serif, "New Song style";} 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] /-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 (1.0,0.05,0.0, elrcs.x, elrsn.x,0.0,-elrsn.x, elrcs.x) Mat3 roty = mat3 (elrcs.y, 0.0jue-elrsn.y,0.0, 1.0,0.0rotx * roty * rotz;normal = rotmat [2]); mat3 rotz = mat3 (elrcs.z, elrsn.z, 0.0mai elrsn.z, elrcs.z, 0.0jue 0.0,0.01,1.0) 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 (0.69174638660746, 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) {vec3 hv = normalize (eyev + lit); specular = pow (max (dot (hv, normal), 0.0);} 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 distancefade = min (1.0, exp ((uFade.x-pdist) * 0.69315 / uFade.y));} # 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;float r;if(flwrp.x < 0.0) {r = ellipse(flwrp, vec2(0.065, 0.024) * 0.5, vec2(0.36, 0.96) * 0.5);}else {r = ellipse(flwrp, vec2(0.065, 0.024) * 0.5, vec2(0.58, 0.96) * 0.5);}if(r >

Rstop) discard;vec3 col = mix (vec3 (1.0,0.8,0.75), vec3 (1.0,0.9,0.87), r); float grady = mix (0.0,1.0, pow (coord.y * 0.5,0.5,0.35); col * = vec3 (1.0,0.8,0.75); col * = mix (0.8,1.0, pow (abs (coord.x), 0.3); col = col * diffuse + specular Col = mix (fadeCol, col, distancefade); float alpha = (rstop > 0.001)? (0.5-r / (rstop * 2.0)): 1.0 palpha;gl_FragColor = smoothstep (0.0,1.0, alpha) * palpha;gl_FragColor = vec4 (col * 0.5, alpha);} uniform vec3 uResolution;attribute vec2 aPosition;varying vec2 texCoord;varying vec2 screenCoord;void main (void) {gl_Position = vec4 (aPosition, 0.0,1.0) TexCoord = aPosition.xy * 0.5 + vec2 (0.5,0.5); screenCoord = aPosition.xy * vec2 (uResolution.z, 1.0);} # ifdef GL_ES//precision mediump float;precision highp float;#endifuniform vec2 uTimes;varying vec2 texCoord;varying vec2 screenCoord;void main (void) {vec3 col;float tmpv = texCoord * vec2 (0.8,1.0)-vec2 (0.95,1.0); c = exp (- pow (length (tmpv) * 1.8,2.0)) Col = mix (vec3 (0.02,0.08,0.03), vec3 (0.96,0.98,1.0) * 1.5c); gl_FragColor = vec4 (col * 0.5,1.0);} # ifdef GL_ES//precision mediump float;precision highp float;#endifuniform sampler2D uSrc;uniform vec2 uDelta;varying vec2 texCoord;varying vec2 screenCoord;void main (void) {vec4 col = texture2D (uSrc, texCoord) Gl_FragColor = vec4 (col.rgb * 2.0,1.0);} # ifdef GL_ES//precision mediump float;precision highp float;#endifuniform sampler2D uSrc;uniform vec2 uDelta;uniform vec4 uBlurDir; / / dir (x, y), stride (z, w) varying vec2 texCoord;varying vec2 screenCoord;void main (void) {vec4 col = texture2D (uSrc, texCoord); col = col + texture2D (uSrc, texCoord + uBlurDir.xy * uDelta); col = col + texture2D (uSrc, texCoord-uBlurDir.xy * uDelta) Col = col + texture2D (uSrc, texCoord + (uBlurDir.xy + uBlurDir.zw) * uDelta); col = col + texture2D (uSrc, texCoord-(uBlurDir.xy + uBlurDir.zw) * uDelta); gl_FragColor = col / 5.0;} # ifdef GL_ES//precision mediump float;precision highp float;#endifuniform sampler2D uSrc;uniform vec2 uDelta;varying vec2 texCoord;varying vec2 screenCoord;void main (void) {gl_FragColor = texture2D (uSrc, texCoord);} uniform vec3 uResolution;attribute vec2 aPosition;varying vec2 texCoord;varying vec2 screenCoord Void main (void) {gl_Position = vec4 (aPosition, 0.0,1.0); texCoord = aPosition.xy * 0.5 + vec2 (0.5,0.5); screenCoord = aPosition.xy * vec2 (uResolution.z, 1.0);} # ifdef GL_ES//precision mediump float;precision highp float;#endifuniform sampler2D uSrc;uniform sampler2D uBloom;uniform vec2 uDelta;varying vec2 texCoord;varying vec2 screenCoord;void main (void) {vec4 srccol = texture2D (uSrc, texCoord) * 2.0 boot vec4 bloomcol = texture2D (uBloom, texCoord) Vec4 col;col = srccol + bloomcol * (vec4 (1.0) + srccol); col * = smoothstep (1.0,0.0, pow (length ((texCoord-vec2) * 2.0), 1.2) * 0.5); col = pow (col, vec4 (0.45454545454545); / / (1.02.2) gl_FragColor = vec4 (col.rgb, 1.0); gl_FragColor.a = 1.0;}

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