cesium

Rain.glsl

@@ -0,0 +1,26 @@
+uniform sampler2D colorTexture;//输入的场景渲染照片
+varying vec2 v_textureCoordinates;
+
+float hash(float x){
+    return fract(sin(x*133.3)*13.13);
+}
+
+void main(void){
+
+    float time = czm_frameNumber / 500.0;
+    vec2 resolution = czm_viewport.zw;
+
+    vec2 uv=(gl_FragCoord.xy*2.-resolution.xy)/min(resolution.x,resolution.y);
+    vec3 c=vec3(.6,.7,.8);
+
+    float a=-.4;
+    float si=sin(a),co=cos(a);
+    uv*=mat2(co,-si,si,co);
+    uv*=length(uv+vec2(0,4.9))*.3+1.;
+
+    float v=1.-sin(hash(floor(uv.x*100.))*2.);
+    float b=clamp(abs(sin(20.*time*v+uv.y*(5./(2.+v))))-.95,0.,1.)*20.;
+    c*=v*b; //屏幕上雨的颜色
+
+    gl_FragColor = mix(texture2D(colorTexture, v_textureCoordinates), vec4(c,1), 0.5); //将雨和三维场景融合
+}

Rain.js

@@ -0,0 +1,28 @@
+//This file is automatically rebuilt by the Cesium build process.
+export default "uniform sampler2D colorTexture;//输入的场景渲染照片\n\
+varying vec2 v_textureCoordinates;\n\
+\n\
+float hash(float x){\n\
+    return fract(sin(x*133.3)*13.13);\n\
+}\n\
+\n\
+void main(void){\n\
+    \n\
+    float time = czm_frameNumber / 60.0;\n\
+    vec2 resolution = czm_viewport.zw;\n\
+    \n\
+    vec2 uv=(gl_FragCoord.xy*2.-resolution.xy)/min(resolution.x,resolution.y);\n\
+    vec3 c=vec3(.6,.7,.8);\n\
+    \n\
+    float a=-.4;\n\
+    float si=sin(a),co=cos(a);\n\
+    uv*=mat2(co,-si,si,co);\n\
+    uv*=length(uv+vec2(0,9.9))*.3+1.;\n\
+    \n\
+    float v=1.-sin(hash(floor(uv.x*100.))*2.);\n\
+    float b=clamp(abs(sin(20.*time*v+uv.y*(5./(2.+v))))-.95,0.,1.)*20.;\n\
+    c*=v*b; //屏幕上雨的颜色\n\
+    \n\
+    gl_FragColor = mix(texture2D(colorTexture, v_textureCoordinates), vec4(c,1), 0.5); //将雨和三维场景融合\n\
+\n\
+} "

Snow.glsl

@@ -0,0 +1,31 @@
+uniform sampler2D colorTexture; //输入的场景渲染照片
+varying vec2 v_textureCoordinates;
+
+float snow(vec2 uv,float scale)
+{
+    float time = czm_frameNumber / 60.0;
+    float w=smoothstep(1.,0.,-uv.y*(scale/10.));if(w<.1)return 0.;
+    uv+=time/scale;uv.y+=time*2./scale;uv.x+=sin(uv.y+time*.5)/scale;
+    uv*=scale;vec2 s=floor(uv),f=fract(uv),p;float k=3.,d;
+    p=.5+.35*sin(11.*fract(sin((s+p+scale)*mat2(7,3,6,5))*5.))-f;d=length(p);k=min(d,k);
+    k=smoothstep(0.,k,sin(f.x+f.y)*0.01);
+    return k*w;
+}
+
+void main(void){
+    vec2 resolution = czm_viewport.zw;
+    vec2 uv=(gl_FragCoord.xy*2.-resolution.xy)/min(resolution.x,resolution.y);
+    vec3 finalColor=vec3(0);
+    //float c=smoothstep(1.,0.3,clamp(uv.y*.3+.8,0.,.75));
+    float c = 0.0;
+    c+=snow(uv,30.)*.0;
+    c+=snow(uv,20.)*.0;
+    c+=snow(uv,15.)*.0;
+    c+=snow(uv,10.);
+    c+=snow(uv,8.);
+    c+=snow(uv,6.);
+    c+=snow(uv,5.);
+    finalColor=(vec3(c)); //屏幕上雪的颜色
+    gl_FragColor = mix(texture2D(colorTexture, v_textureCoordinates), vec4(finalColor,1), 0.5);  //将雪和三维场景融合
+
+}

Snow.js

@@ -0,0 +1,32 @@
+//This file is automatically rebuilt by the Cesium build process.
+export default "uniform sampler2D colorTexture;\n\
+ varying vec2 v_textureCoordinates; \n\
+ \n\
+float snow(vec2 uv,float scale)\n\
+{\n\
+    float time = czm_frameNumber / 60.0;\n\
+    float w=smoothstep(1.,0.,-uv.y*(scale/10.));if(w<.1)return 0.;\n\
+    uv+=time/scale;uv.y+=time*2./scale;uv.x+=sin(uv.y+time*.5)/scale;\n\
+    uv*=scale;vec2 s=floor(uv),f=fract(uv),p;float k=3.,d;\n\
+    p=.5+.35*sin(11.*fract(sin((s+p+scale)*mat2(7,3,6,5))*5.))-f;d=length(p);k=min(d,k);\n\
+    k=smoothstep(0.,k,sin(f.x+f.y)*0.01);\n\
+    return k*w;\n\
+}\n\
+\n\
+void main(void){\n\
+    vec2 resolution = czm_viewport.zw;\n\
+    vec2 uv=(gl_FragCoord.xy*2.-resolution.xy)/min(resolution.x,resolution.y);\n\
+    vec3 finalColor=vec3(0);\n\
+    //float c=smoothstep(1.,0.3,clamp(uv.y*.3+.8,0.,.75));\n\
+    float c = 0.0;\n\
+    c+=snow(uv,30.)*.0;\n\
+    c+=snow(uv,20.)*.0;\n\
+    c+=snow(uv,15.)*.0;\n\
+    c+=snow(uv,10.);\n\
+    c+=snow(uv,8.);\n\
+    c+=snow(uv,6.);\n\
+    c+=snow(uv,5.);\n\
+    finalColor=(vec3(c)); //屏幕上雪的颜色\n\
+    gl_FragColor = mix(texture2D(colorTexture, v_textureCoordinates), vec4(finalColor,1), 0.5);  //将雪和三维场景融合\n\
+    \n\
+} ";