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This article mainly introduces "HTML5 how to achieve multi-view 3D realistic water wave animation". In daily operation, I believe that many people have doubts about how to achieve multi-view 3D realistic water wave animation in HTML5. I have consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful for you to answer the doubt of "how to achieve multi-view 3D realistic water wave animation with HTML5". Next, please follow the editor to study!

HTML code

XML / HTML code copies content to text

< img id = " tiles" src = " tiles.jpg" >

< img id = " xneg" src = " xneg.jpg" >

< img id = " xpos" src = " xpos.jpg" >

< img id = " ypos" src = " ypos.jpg" >

< img id = " zneg" src = " zneg.jpg" >

< img id = " zpos" src = " zpos.jpg" >

JavaScript code

The JavaScript code copies the content to

Function Water () {

Var vertexShader ='/

Changing vec2 coordinates; /

Void main () {/

Coordinates = gl_Vertex.xy * 0.5 + 0.5; /

Gl_Position = vec4 (gl_Vertex.xyz,1.0); /

} /

'To

This .plane = GL.Mesh.plane ()

If (! GL.Texture.canUseFloatingPointTextures () {

Throw a new error ("this demo requires an OES_texture_float extension")

}

Var filter = GL.Texture.canUseFloatingPointLinearFiltering ()? Gl.LINEAR:gl.NEAREST

This .textureA = the new GL.Texture (256 GL.Texture 256, {Type: gl.FLOAT, filter: filter})

This .textureB = the new GL.Texture (256 GL.Texture 256, {Type: gl.FLOAT, filter: filter})

This .dropShader = new GL.Shader (vertexShader,'/

Const float PI = 3.141592653589793; /

Uniform sampler2D texture; /

Unified vec2 center; /

Uniform floating radius; /

Uniform buoyancy; /

Changing vec2 coordinates; /

Void main () {/

/ * get vertex information * / /

Vec4 information = texture2D (texture, coordinates); /

/

/ * add drop to height * / /

Floating drop = max (0.05m 1.0-length (center * 0.5 + 0.5-coordinates) / radius); /

Drop = 0.5-cos (drop * PI) * 0.5; /

Info.r + = decrease in strength; /

/

Gl_FragColor = info; /

} /

')

This .updateShader = new GL.Shader (vertexShader,'/

Uniform sampler2D texture; /

Unified vec2 increment; /

Changing vec2 coordinates; /

Void main () {/

/ * get vertex information * / /

Vec4 information = texture2D (texture, coordinates); /

/

/ * calculate the average neighbor height * / /

Vec2 dx = vec2 (delta.x,0.0); /

Vec2 dy = vec2 (0.0line delta.y); /

Floating average = (/

Texture2D (texture, coordinates-dx). R + /

Texture2D (texture, coordinates-dy). R + /

Texture2D (texture, coordinates + dx). R + /

Texture2D (texture, coordinates + dy). R /

) * 0.25; /

/

/ * change the speed to move to the average * /

Info.g + = (average-info.r) * 2.0; /

/

/ * slow down the speed slightly, so the waves won't last forever * / /

Info.g * = 0.995; /

/

/ * move vertices along the speed * / /

Info.r + = info.g; /

/

Gl_FragColor = info; /

} /

')

This .roomShader = new GL.Shader (vertexShader,'/

Uniform sampler2D texture; /

Unified vec2 increment; /

Changing vec2 coordinates; /

Void main () {/

/ * get vertex information * / /

Vec4 information = texture2D (texture, coordinates); /

/

/ * update general * / /

Vec3 dx = vec3 (delta.x,texture2D (texture,vec2 (coord.x + delta.x,coord.y)). Rmurinfo. RJO. 0); /

Vec3 dy = vec3 (0.0text texture2D (texture, vec2 (coord.x,coord.y + delta.y)). Rsquire info.rline delta.y); /

Info.ba = normalize (cross (dy,dx)). Xz; /

/

Gl_FragColor = info; /

} /

')

This .sphereShader = new GL.Shader (vertexShader,'/

Uniform sampler2D texture; /

Unified vec3 oldCenter; /

Unified vec3 newCenter; /

Uniform floating radius; /

Changing vec2 coordinates; /

/

Float volumeInSphere (vec3 center) {/

Vec3 to Center = vec3 (coord.x * 2. 0-1. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0)-center; /

Floating point t = length (to center) / radius; /

Floating point dy = exp (- pow (t * 1.5) 6.0); /

Floating-point ymin = min (0.05m center.ymurdy); /

Floating point ymax = min (max (0.0center.y + dy), ymin + 2.0 * dy); /

Rate of return (ymax-ymin) * 0.1; /

} /

/

Void main () {/

/ * get vertex information * / /

Vec4 information = texture2D (texture, coordinates); /

/

/ * add old volumes * / /

Info.r + = volumeInSphere (oldCenter); /

/

/ * minus new volume * / /

Info.r-= volumeInSphere (newCenter); /

/

Gl_FragColor = info; /

} /

')

}

Water.prototype.addDrop = function (x ~ ~ y, radius, intensity) {

Var this_ = this

This .textureB.drawTo (function () {)

This_.textureA.bind ()

This_.dropShader.uniforms ({

Centre: [XBI y]

Radius: radius

Strength: strength

}). Draw (this_.plane)

})

This .textureB.swapWith (this .textureA)

}

Water.prototype.moveSphere = function (old center, new center, radius) {

Var this_ = this

This .textureB.drawTo (function () {)

This_.textureA.bind ()

This_.sphereShader.uniforms ({

OldCenter:oldCenter

NewCenter:newCenter

Radius: radius

}). Draw (this_.plane)

})

This .textureB.swapWith (this .textureA)

}

Water.prototype.stepSimulation = function () {

Var this_ = this

This .textureB.drawTo (function () {)

This_.textureA.bind ()

This_.updateShader.uniforms ({

Increment: [1 / / this_.textureA.width,1 / / this_.textureA.height]

}). Draw (this_.plane)

})

This .textureB.swapWith (this .textureA)

}

Water.prototype.updateNormals = function () {

Var this_ = this

This .textureB.drawTo (function () {)

This_.textureA.bind ()

This_.normalShader.uniforms ({

Increment: [1 / / this_.textureA.width,1 / / this_.textureA.height]

}). Draw (this_.plane)

})

This .textureB.swapWith (this .textureA)

}

At this point, the study on "how to achieve multi-view 3D realistic water wave animation by HTML5" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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