有些人非要跟我争辩什么SSAO有多难开发

  • o
    oz01
    其实随随便便一个山寨游戏都能做出来，烂大街的东西
    而且目前正在被HBAO和HDAO取代
    下面这是我用了2天时间随便搞的
    左边开启SSAO，右边未开启SSAO


    SSAO像素着色器代码：
    1. #version 110
    2. #extension GL_ARB_texture_rectangle : enable
    3. uniform vec4 SSAOSet;
    4. uniform sampler2DRect SSAOTex;
    6. float readDepth( in vec2 coord ) {
    7. return SSAOSet.z/( 1.0- texture2DRect( SSAOTex, coord ).x * ( SSAOSet.w - SSAOSet.z ) /SSAOSet.w);
    8. }
    11. float cDepths( in float depth1, in float depth2, in float depthm ,in float bais)
    12. {
    13. float aoo= min(1.0,max(0.0,-(depth1+depth2-depthm*2.0)-0.5));
    14. aoo*=min(1.0,max(0.0,3.0*bais-abs(depth1-depth2)));
    15. return aoo;
    16. }
    17. void main(void)
    18. {
    19. vec2 texCoord=gl_FragCoord.xy;
    20. float depth = readDepth( texCoord );
    21. float depthMAX=SSAOSet.z/( 1.0- ( SSAOSet.w - SSAOSet.z ) /SSAOSet.w);
    22. float pw = 1.0 ;
    23. float ph = 1.0 ;
    27. float aoscale=1.0;
    28. float dp1;
    29. float dp2;
    30. float aod = 0.0;
    31. float dpbais = 2.0;
    34. dp1=readDepth( vec2(texCoord.x+pw,texCoord.y+ph));
    35. dp2=readDepth( vec2(texCoord.x-pw,texCoord.y-ph));
    36. aod+=cDepths(dp1,dp2,depth,dpbais);
    38. dp1=readDepth( vec2(texCoord.x-pw,texCoord.y+ph));
    39. dp2=readDepth( vec2(texCoord.x+pw,texCoord.y-ph));
    40. aod+=cDepths(dp1,dp2,depth,dpbais);
    42. dp1=readDepth( vec2(texCoord.x+pw,texCoord.y));
    43. dp2=readDepth( vec2(texCoord.x-pw,texCoord.y));
    44. aod+=cDepths(dp1,dp2,depth,dpbais);
    46. dp1=readDepth( vec2(texCoord.x,texCoord.y+ph));
    47. dp2=readDepth( vec2(texCoord.x,texCoord.y-ph));
    48. aod+=cDepths(dp1,dp2,depth,dpbais);
    52. pw*=2.0;
    53. ph*=2.0;
    54. dpbais+=1.0;
    55. aoscale*=1.15;
    57. dp1=readDepth( vec2(texCoord.x+pw,texCoord.y+ph));
    58. dp2=readDepth( vec2(texCoord.x-pw,texCoord.y-ph));
    59. aod+=cDepths(dp1,dp2,depth,dpbais)/aoscale;
    61. dp1=readDepth( vec2(texCoord.x-pw,texCoord.y+ph));
    62. dp2=readDepth( vec2(texCoord.x+pw,texCoord.y-ph));
    63. aod+=cDepths(dp1,dp2,depth,dpbais)/aoscale;
    65. dp1=readDepth( vec2(texCoord.x+pw,texCoord.y));
    66. dp2=readDepth( vec2(texCoord.x-pw,texCoord.y));
    67. aod+=cDepths(dp1,dp2,depth,dpbais)/aoscale;
    69. dp1=readDepth( vec2(texCoord.x,texCoord.y+ph));
    70. dp2=readDepth( vec2(texCoord.x,texCoord.y-ph));
    71. aod+=cDepths(dp1,dp2,depth,dpbais)/aoscale;
    73. pw*=2.0;
    74. ph*=2.0;
    75. dpbais+=1.0;
    76. aoscale*=1.15;
    78. dp1=readDepth( vec2(texCoord.x+pw,texCoord.y+ph));
    79. dp2=readDepth( vec2(texCoord.x-pw,texCoord.y-ph));
    80. aod+=cDepths(dp1,dp2,depth,dpbais)/aoscale;
    82. dp1=readDepth( vec2(texCoord.x-pw,texCoord.y+ph));
    83. dp2=readDepth( vec2(texCoord.x+pw,texCoord.y-ph));
    84. aod+=cDepths(dp1,dp2,depth,dpbais)/aoscale;
    86. dp1=readDepth( vec2(texCoord.x+pw,texCoord.y));
    87. dp2=readDepth( vec2(texCoord.x-pw,texCoord.y));
    88. aod+=cDepths(dp1,dp2,depth,dpbais)/aoscale;
    90. dp1=readDepth( vec2(texCoord.x,texCoord.y+ph));
    91. dp2=readDepth( vec2(texCoord.x,texCoord.y-ph));
    92. aod+=cDepths(dp1,dp2,depth,dpbais)/aoscale;
    94. pw*=2.0;
    95. ph*=2.0;
    96. dpbais+=1.0;
    97. aoscale*=1.15;
    99. dp1=readDepth( vec2(texCoord.x+pw,texCoord.y+ph));
    100. dp2=readDepth( vec2(texCoord.x-pw,texCoord.y-ph));
    101. aod+=cDepths(dp1,dp2,depth,dpbais)/aoscale;
    103. dp1=readDepth( vec2(texCoord.x-pw,texCoord.y+ph));
    104. dp2=readDepth( vec2(texCoord.x+pw,texCoord.y-ph));
    105. aod+=cDepths(dp1,dp2,depth,dpbais)/aoscale;
    107. dp1=readDepth( vec2(texCoord.x+pw,texCoord.y));
    108. dp2=readDepth( vec2(texCoord.x-pw,texCoord.y));
    109. aod+=cDepths(dp1,dp2,depth,dpbais)/aoscale;
    111. dp1=readDepth( vec2(texCoord.x,texCoord.y+ph));
    112. dp2=readDepth( vec2(texCoord.x,texCoord.y-ph));
    113. aod+=cDepths(dp1,dp2,depth,dpbais)/aoscale;
    115. if(depthMAX*0.225<depth)
    116. aod=0.0;
    117. gl_FragColor = vec4(0.0,0.0,0.0,aod/16.0) ;
    118. }
    复制代码
  • c
    chri
    刷出图了....
  • Y
    Yurita
    oz巨巨万岁！！！
  • r
    roadcross
    红叉*2
  • i
    itomakoto
    没看错吧搞这东西需要两天？lz一定是家里网速很慢下载vs用了一天半吧
  • r
    roadcross
    你做出来一个试试看
    无论你是直接用深度渲染缓冲还是另外渲染一个Zpos浮点纹理都行
  • i
    itomakoto
    满世界的demo+源码还需要自己做么
    稍微牛逼点点的不也是拿着别人的论文慢慢啃
    天朝的码农们有跳出这个模式的？
  • r
    roadcross
    我该怎么吐槽好呢
  • P
    PIN
    Don't feed the troll.
  • p
    parsifal
    有，只不过你不认识而已