Question

我正在LWJGL制作一个体素游戏，并想出如何实现一个SSAO着色器，但它并没有看到我的预期。看远处的街区很好，我可以看到街区的渐变阴影轮廓。但是近距离，渐变阴影消失了，只留下了块的颜色（加上我制作的另一个简单的着色器，给每个块边有不同的阴影）。

以下是不同距离的游戏内容： https://github.com/ninthworld/GreedyMeshing/raw/master/screenshot1.png https://github.com/ninthworld/GreedyMeshing/raw/master/screenshot2.png

以下是我的预期： https://github.com/ninthworld/GreedyMeshing/raw/master/screenshot3.png

这就是我的SSAO.frag着色器代码：

uniform sampler2D texture0;
uniform sampler2D texture1;

uniform vec2 camerarange;
uniform vec2 screensize;

float readDepth( in vec2 coord ) {
    return (2.0 * camerarange.x) / (camerarange.y + camerarange.x - texture2D( texture0, coord ).x * (camerarange.y - camerarange.x));  
}


void main(void)
{   
    vec2 texCoord = gl_TexCoord[0].st;
    //vec2 texCoord = texture2D(texture0, gl_TexCoord[0].st).xy;
    //vec3 texColor = texture2D(texture1, gl_TexCoord[0].st).rgb;

    float depth = readDepth( texCoord );
    float d;

    float pw = 1.0 / screensize.x;
    float ph = 1.0 / screensize.y;

    float aoCap = 0.45;

    float ao = 0.0;

    float aoMultiplier=1000.0;

    float depthTolerance = 0.008;

    d=readDepth( vec2(texCoord.x+pw,texCoord.y+ph));
    ao+=min(aoCap,max(0.0,depth-d-depthTolerance) * aoMultiplier);

    d=readDepth( vec2(texCoord.x-pw,texCoord.y+ph));
    ao+=min(aoCap,max(0.0,depth-d-depthTolerance) * aoMultiplier);

    d=readDepth( vec2(texCoord.x+pw,texCoord.y-ph));
    ao+=min(aoCap,max(0.0,depth-d-depthTolerance) * aoMultiplier);

    d=readDepth( vec2(texCoord.x-pw,texCoord.y-ph));
    ao+=min(aoCap,max(0.0,depth-d-depthTolerance) * aoMultiplier);

    pw*=2.0;
    ph*=2.0;
    aoMultiplier/=2.0;

    d=readDepth( vec2(texCoord.x+pw,texCoord.y+ph));
    ao+=min(aoCap,max(0.0,depth-d-depthTolerance) * aoMultiplier);

    d=readDepth( vec2(texCoord.x-pw,texCoord.y+ph));
    ao+=min(aoCap,max(0.0,depth-d-depthTolerance) * aoMultiplier);

    d=readDepth( vec2(texCoord.x+pw,texCoord.y-ph));
    ao+=min(aoCap,max(0.0,depth-d-depthTolerance) * aoMultiplier);

    d=readDepth( vec2(texCoord.x-pw,texCoord.y-ph));
    ao+=min(aoCap,max(0.0,depth-d-depthTolerance) * aoMultiplier);

    pw*=2.0;
    ph*=2.0;
    aoMultiplier/=2.0;

    d=readDepth( vec2(texCoord.x+pw,texCoord.y+ph));
    ao+=min(aoCap,max(0.0,depth-d-depthTolerance) * aoMultiplier);

    d=readDepth( vec2(texCoord.x-pw,texCoord.y+ph));
    ao+=min(aoCap,max(0.0,depth-d-depthTolerance) * aoMultiplier);

    d=readDepth( vec2(texCoord.x+pw,texCoord.y-ph));
    ao+=min(aoCap,max(0.0,depth-d-depthTolerance) * aoMultiplier);

    d=readDepth( vec2(texCoord.x-pw,texCoord.y-ph));
    ao+=min(aoCap,max(0.0,depth-d-depthTolerance) * aoMultiplier);

    pw*=2.0;
    ph*=2.0;
    aoMultiplier/=2.0;

    d=readDepth( vec2(texCoord.x+pw,texCoord.y+ph));
    ao+=min(aoCap,max(0.0,depth-d-depthTolerance) * aoMultiplier);

    d=readDepth( vec2(texCoord.x-pw,texCoord.y+ph));
    ao+=min(aoCap,max(0.0,depth-d-depthTolerance) * aoMultiplier);

    d=readDepth( vec2(texCoord.x+pw,texCoord.y-ph));
    ao+=min(aoCap,max(0.0,depth-d-depthTolerance) * aoMultiplier);

    d=readDepth( vec2(texCoord.x-pw,texCoord.y-ph));
    ao+=min(aoCap,max(0.0,depth-d-depthTolerance) * aoMultiplier);

    ao/=16.0;

    gl_FragColor = vec4(1.0-ao) * texture2D(texture1, texCoord);
}

两个采样器都接收我从GL_RGBA和GL_DEPTH_COMPONENT创建的纹理，然后gl_FragColor绘制到占据屏幕的2D平面。

如果查看更多代码会有所帮助，这里是github页面https://github.com/ninthworld/GreedyMeshing

SSAO着色器未按预期工作

0 个答案: