webgl实现跟随鼠标交互的宇宙黑洞效果代码-html代码-BFW代码库

webgl实现跟随鼠标交互的宇宙黑洞效果代码

代码语言：html

所属分类：其他

代码描述：webgl实现跟随鼠标交互的宇宙黑洞效果代码

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 translate="no">
  <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 = vec4(color,1.);
}
// ]]></script>
<script id="2d-vertex-shader" type="x-shader/x-vertex">// <![CDATA[
        attribute vec2 a_position;
        attribute vec2 a_texCoord;
        
        varying vec2 v_texCoord;
        void main() {
                gl_Position = vec4(a_position, 0, 1);
                v_texCoord = a_texCoord;
        }
        // ]]></script>
<canvas id="glscreen"></canvas>
<script type="text/javascript" src="//repo.bfw.wiki/bfwrepo/js/jquery-3.2.1.min.js"></script>
      <script  >
var bgUrl = '//repo.bfw.wiki/bfwrepo/image/665a539c3f82e.png';

var blackholeMass = 5500;
var curblackholeMass = 0;

var canvas, gl; // canvas and webgl context

var shaderScript;
var shaderSource;
var vertexShader; // Vertex shader. Not much happens in that shader, it just creates the vertex's to be drawn on
var fragmentShader; // this shader is where the magic happens. Fragment = pixel. Vertex = kind of like "faces" on a 3d model.
var buffer;

/* Variables holding the location of uniform variables in the WebGL. We use this to send info to the WebGL script. */
var locationOfTime;
var locationOfResolution;
var locationOfMouse;
var locationOfMass;
var locationOfclickedTime;

var originY = window.innerHeight,
originX = window.innerWidth;

var mouse, tar.........完整代码请登录后点击上方下载按钮下载查看