webgl实现宇宙黑洞鼠标跟随交互动画效果代码-html代码-BFW代码库

webgl实现宇宙黑洞鼠标跟随交互动画效果代码

代码语言：html

所属分类：动画

代码描述：webgl实现宇宙黑洞鼠标跟随交互动画效果代码

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <style>
        html, body {
          position: absolute;
          top: 0px;
          left: 0px;
          right: 0px;
          bottom: 0px;
          padding: 0px;
          cursor: none;
          margin: 0px;
          overflow: hidden;
          display: flex;
          height: 100%;
          width: 100%;
          background-color: #000;
        }
        
        canvas {
          margin: auto auto;
        }
    </style>

</head>

<body>
   <script id="2d-fragment-shader" type="x-shader/x-fragment">// <![CDATA[

// Look below at line 23 for realism.

#ifdef GL_ES
precision mediump float;
#endif

#define PI 3.14159265359

uniform sampler2D u_image;
varying vec2 v_texCoord;

uniform vec2 u_resolution;
uniform vec2 u_mouse;
uniform float u_mass;
uniform float u_time;
uniform float u_clickedTime;

vec2 rotate(vec2 mt, vec2 st, float angle){
	float cos = cos((angle + u_clickedTime) * PI); // try replacing * 1.0 with * PI
	float sin = sin(angle * 0.0); // try removing the * 0.0
	
	// Uncomment these two lines for realism
	//float cos = cos(angle) * (u_time * 0.3);
	//float sin = sin(angle) * (u_time * 0.3);
	
	float nx = (cos * (st.x - mt.x)) + (sin * (st.y - mt.y)) + mt.x;
	float ny = (cos * (st.y - mt.y)) - (sin * (st.x - mt.x)) + mt.y;
	return vec2(nx, ny);
}

void main() {
     vec2 st = vec2(gl_FragCoord.x, u_resolution.y - gl_FragCoord.y)/u_resolution;
	vec2 mt = vec2(u_mouse.x, u_resolution.y - u_mouse.y)/u_resolution;

	float dx = st.x - mt.x;
	float dy = st.y - mt.y;

	float dist = sqrt(dx * dx + dy * dy);
	float pull = u_mass / (dist * dist);
	
     vec3 color = vec3(0.0);
	
	vec2 r = rotate(mt,st,pull);
	vec4 imgcolor = texture2D(u_image, r);
	color = vec3(
		(imgcolor.x - (pull * 0.25)),
		(imgcolor.y - (pull * 0.25)), 
		(imgcolor.z - (pull * 0.25))
	);
	

     gl_FragColor = ve.........完整代码请登录后点击上方下载按钮下载查看