溫馨提示×
您好，登錄后才能下訂單哦！
點擊 登錄注冊 即表示同意《億速云用戶服務條款》
您好，登錄后才能下訂單哦！
如何制作多視角3D逼真HTML5水波動畫 ，針對這個問題，這篇文章詳細介紹了相對應的分析和解答，希望可以幫助更多想解決這個問題的小伙伴找到更簡單易行的方法。
這是一款基于HTML5的3D水波動畫特效，它的效果非常逼真，我們可以按“G”鍵來讓水池中的石頭上下浮動，按“L”鍵添加燈光效果，設計相當完美。同時說明一下，這款3D水波動畫是基于WebGL渲染技術的，大家可以了解一下WebGL。
HTML代碼
XML/HTML Code復制內容到剪貼板
<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代碼
JavaScript Code復制內容到剪貼板
function Water() {
var vertexShader = '\
varying vec2 coord;\
void main() {\
coord = gl_Vertex.xy * 0.5 + 0.5;\
gl_Position = vec4(gl_Vertex.xyz, 1.0);\
}\
';
this.plane = GL.Mesh.plane();
if (!GL.Texture.canUseFloatingPointTextures()) {
throw new Error('This demo requires the OES_texture_float extension');
}
var filter = GL.Texture.canUseFloatingPointLinearFiltering() ? gl.LINEAR : gl.NEAREST;
this.textureA = new GL.Texture(256, 256, { type: gl.FLOAT, filter: filter });
this.textureB = new GL.Texture(256, 256, { type: gl.FLOAT, filter: filter });
this.dropShader = new GL.Shader(vertexShader, '\
const float PI = 3.141592653589793;\
uniform sampler2D texture;\
uniform vec2 center;\
uniform float radius;\
uniform float strength;\
varying vec2 coord;\
void main() {\
/* get vertex info */\
vec4 info = texture2D(texture, coord);\
\
/* add the drop to the height */\
float drop = max(0.0, 1.0 - length(center * 0.5 + 0.5 - coord) / radius);\
drop = 0.5 - cos(drop * PI) * 0.5;\
info.r += drop * strength;\
\
gl_FragColor = info;\
}\
');
this.updateShader = new GL.Shader(vertexShader, '\
uniform sampler2D texture;\
uniform vec2 delta;\
varying vec2 coord;\
void main() {\
/* get vertex info */\
vec4 info = texture2D(texture, coord);\
\
/* calculate average neighbor height */\
vec2 dx = vec2(delta.x, 0.0);\
vec2 dy = vec2(0.0, delta.y);\
float average = (\
texture2D(texture, coord - dx).r +\
texture2D(texture, coord - dy).r +\
texture2D(texture, coord + dx).r +\
texture2D(texture, coord + dy).r\
) * 0.25;\
\
/* change the velocity to move toward the average */\
info.g += (average - info.r) * 2.0;\
\
/* attenuate the velocity a little so waves do not last forever */\
info.g *= 0.995;\
\
/* move the vertex along the velocity */\
info.r += info.g;\
\
gl_FragColor = info;\
}\
');
this.normalShader = new GL.Shader(vertexShader, '\
uniform sampler2D texture;\
uniform vec2 delta;\
varying vec2 coord;\
void main() {\
/* get vertex info */\
vec4 info = texture2D(texture, coord);\
\
/* update the normal */\
vec3 dx = vec3(delta.x, texture2D(texture, vec2(coord.x + delta.x, coord.y)).r - info.r, 0.0);\
vec3 dy = vec3(0.0, texture2D(texture, vec2(coord.x, coord.y + delta.y)).r - info.r, delta.y);\
info.ba = normalize(cross(dy, dx)).xz;\
\
gl_FragColor = info;\
}\
');
this.sphereShader = new GL.Shader(vertexShader, '\
uniform sampler2D texture;\
uniform vec3 oldCenter;\
uniform vec3 newCenter;\
uniform float radius;\
varying vec2 coord;\
\
float volumeInSphere(vec3 center) {\
vec3 toCenter = vec3(coord.x * 2.0 - 1.0, 0.0, coord.y * 2.0 - 1.0) - center;\
float t = length(toCenter) / radius;\
float dy = exp(-pow(t * 1.5, 6.0));\
float ymin = min(0.0, center.y - dy);\
float ymax = min(max(0.0, center.y + dy), ymin + 2.0 * dy);\
return (ymax - ymin) * 0.1;\
}\
\
void main() {\
/* get vertex info */\
vec4 info = texture2D(texture, coord);\
\
/* add the old volume */\
info.r += volumeInSphere(oldCenter);\
\
/* subtract the new volume */\
info.r -= volumeInSphere(newCenter);\
\
gl_FragColor = info;\
}\
');
}
Water.prototype.addDrop = function(x, y, radius, strength) {
var this_ = this;
this.textureB.drawTo(function() {
this_.textureA.bind();
this_.dropShader.uniforms({
center: [x, y],
radius: radius,
strength: strength
}).draw(this_.plane);
});
this.textureB.swapWith(this.textureA);
};
Water.prototype.moveSphere = function(oldCenter, newCenter, 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({
delta: [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({
delta: [1 / this_.textureA.width, 1 / this_.textureA.height]
}).draw(this_.plane);
});
this.textureB.swapWith(this.textureA);
};關于如何制作多視角3D逼真HTML5水波動畫 問題的解答就分享到這里了，希望以上內容可以對大家有一定的幫助，如果你還有很多疑惑沒有解開，可以關注億速云行業資訊頻道了解更多相關知識。
免責聲明：本站發布的內容（圖片、視頻和文字）以原創、轉載和分享為主，文章觀點不代表本網站立場，如果涉及侵權請聯系站長郵箱：is@yisu.com進行舉報，并提供相關證據，一經查實，將立刻刪除涉嫌侵權內容。
