wtc-gl+webgl实现三维立方体对数深度缓冲（Z-抗锯齿）和阴影/轮廓效果代码-html代码-BFW代码库

代码语言：html

所属分类：三维

代码描述：wtc-gl+webgl实现三维立方体对数深度缓冲（Z-抗锯齿）和阴影/轮廓效果代码

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>
body {
  background: pink;
  margin: 0;
  overflow: hidden;
}
canvas {
  
  width: 100vw;
  height: 100vh;
}
</style>


  
  
</head>

<body >
  <script type="text/fragment" id="vertShader">#version 300 es
  in vec3 position;
  in vec2 uv;
  in vec3 normal;
  in mat4 translation;
  in mat4 inverseTranspose;
  in float scale;
  in float id;
  in float faceoffset;
  in vec3 facecolour;
  in vec3 colour;
  
  uniform mat4 u_viewMatrix;
  uniform mat4 u_modelMatrix;
  uniform mat4 u_modelViewMatrix;
  uniform mat4 u_projectionMatrix;
  uniform mat3 u_normalMatrix;
  uniform float u_time;
  uniform float u_logDepthDelta;
  
  out vec3 vNormal;
  out vec3 vPosition;
  out vec3 vWorldPosition;
  out vec2 vUV;
  out float vCol;
  out float depth;
  out vec3 facecol;
  
  #define EPSILON 0.01
  
  void main() {
    vec3 pos = (translation*vec4(scale*position, 1.)).xyz;
    // vec3 pos = position;
    // vec3 pos = mat3(translation)*(scale*position);
    
    vec4 camPos = u_projectionMatrix * u_modelViewMatrix * vec4(pos, 1.0);
    
    // Modify the depth in clip space
    depth = log2( max( EPSILON, camPos.w + 1.0 ) ) * u_logDepthDelta - 1.0;
    // depth = (2.0 * depth - 1.0) * camPos.w; // debug
    // depth = camPos.w;
    // camPos.z = (2.0 * depth - 1.0) * camPos.w;
    
    gl_Position = camPos;
    // gl_Position.w = depth;
    gl_Position.z *= depth;
    
    vUV = uv;
    vNormal = (inverseTranspose * vec4(normal,1)).xyz;
    
    vCol = faceoffset+id;
    facecol = fract(facecolour+colour);
  }
</script>
<script type="text/fragment" id="fragShader">#version 300 es
  precision highp float;
  
  in vec3 vNormal;
  in vec2 vUV;
  in vec4 camPos;
  in vec3 vPosition;
  in vec3 vWorldPosition;
  in float vCol;
  in float depth;
  in vec3 facecol;
  
  out vec4 colour;
  
  uniform float u_time;
  uniform bool u_outlinestage;
  uniform float u_logDepthDelta;
  
    // Procedural colour palettes curtesy Inigo Quilez
  // https://iquilezles.org/www/articles/palettes/palettes.htm
  vec3 palette( in float t, in vec3 a, in vec3 b, in vec3 c, in vec3 d ) {
    return a + b*cos( 6.28318*(c*t+d) );
  }
  
  // Simplex 2D noise
  //
  vec3 permute(vec3 x) { return mod(((x*34.0)+1.0)*x, 289.0); }

  float snoise(vec2 v){
    const vec4 C = vec4(0.211324865405187, 0.366025403784439,
             -0.577350269189626, 0.024390243902439);
    vec2 i  = floor(v + dot(v, C.yy) );
    vec2 x0 = v -   i + dot(i, C.xx);
    vec2 i1;
    i1 = (x0.x > x0.y) ? vec2(1.0, 0.0) : vec2(0.0, 1.0);
    vec4 x12 = x0.xyxy + C.xxzz;
    x12.xy -= i1;
    i = mod(i, 289.0);
    vec3 p = permute( permute( i.y + vec3(0.0, i1.y, 1.0 ))
    + i.x + vec3(0.0, i1.x, 1.0 ));
    vec3 m = max(0.5 - vec3(dot(x0,x0), dot(x12.xy,x12.xy),
      dot(x12.zw,x12.zw)), 0.0);
    m = m*m ;
    m = m*m ;
    vec3 x = 2.0 * fract(p * C.www) - 1.0;
    vec3 h = abs(x) - 0.5;
    vec3 ox = floor(x + 0.5);
    vec3 a0 = x - ox;
    m *= 1.79284291400159 - 0.85373472095314 * ( a0*a0 + h*h );
    vec3 g;
    g.x  = a0.x  * x0.x  + h.x  * x0.y;
    g.yz = a0.yz * x12.xz + h.yz * x12.yw;
    return 130.0 * dot(m, g);
  }
  
  void main() {
    
    gl_FragDepth = gl_FragCoord.z;
    // gl_FragDepth = (log2(depth * 0.5 + 1.0)) * 0.5;
    
    if(u_outlinestage == true) {
      vec2 d = abs(vUV-.5)-.49;
      float f = length(max(d,0.0)) + min(max(d.x,d.y),0.0);

      // The following line is for debugging the geometry.
      colour = vec4(1,vUV,1).grba;
      colour.rgb = palette( vCol, vec3(.5),vec3(1),vec3(1),vec3(0.0,0.33,0.67)*2.);
      colour.rgb = facecol;
      // colour = vec4(vNormal*.5+.5,1);
      // colour = mix(colour, vec4(0,0,0,1), smoothstep(0.,0.01,f));
    
    } else {
      float d = dot(vNormal, normalize(vec3(.5,1,0)));
      float shade = .4 + smoothstep(0., 1., d);
      colour = vec4(vec3(shade), 1);
    }
    
  }
</script>
<script type="text/fragment" id="renderShader">#version 300 es
  precision highp float;

  uniform vec2 u_resolution;
  uniform vec2 u_screenresolution;
  uniform float u_time;
  uniform vec3 u_camera;

  uniform sampler2D b_render;
  uniform sampler2D b_depthrender;
  uniform sampler2D b_depth;
  uniform sampler2D b_buffer;

  in vec2 v_uv;
  out vec4 colour;
  
  float dp(vec2 p) {
    float n = u_camera.x;
    float f = u_camera.y;
    float z = texture(b_depth, p / u_resolution).x;
    float g = (2.0 * n) / (f + n - z*(f-n));
    
    return g;
  }
  vec3 np(vec2 p) {
    return texture(b_depthrender, p / u_resolution).xyz;
  }
  
  void main() {
        
    vec2 p = gl_FragCoord.xy;
    
    int k = 1;
    
    float grey = dp(p);
    float d = 0.;
    for(int x = -k; x <= k; x+=k) {
      for(int y = -k; y <= k; y+=k) {
        if(x==0&&y==0) continue;
        d += abs(grey - dp(p+vec2(x,y)));
      }
    }
    
    vec4 col = texture(b_depthrender, gl_FragCoord.xy / u_resolution);
    float n = 0.........完整代码请登录后点击上方下载按钮下载查看