128 lines
4.7 KiB
GLSL
128 lines
4.7 KiB
GLSL
#version 300 es
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precision mediump float;
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uniform sampler2D texId;
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uniform float colorFac;
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uniform vec4 ambientColor; //环境光颜色
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uniform vec4 diffuseColor; //漫反射光颜色
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uniform vec4 specularColor; //高光颜色
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uniform float specularPow; //高光光泽度
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uniform vec4 replacedColor; //把元素替换为另外一种颜色
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uniform bool isReplaceColor; //是否把元素替换为另外一种颜色
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uniform int isMixColor;//是否混合颜色
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in vec2 fragTexCoord;
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in vec3 fragEyeNormal;
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in vec3 fragEyePos;
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in vec3 lightEyePos;
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in float _changeColorCmd;
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in float _changeColorRatio;
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in float _changeColorOff;
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in float distanceFromCamera;
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uniform bool isFogEnable;
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uniform vec3 fogColor;
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uniform float fogStart;
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uniform float fogEnd;
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uniform float fogDensity;
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uniform bool isBlurEnable;
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uniform vec3 blurColor;
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uniform float blurStart;
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uniform float blurEnd;
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uniform float blurDensity;
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uniform vec3 cameraPos;
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uniform float zoom;
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uniform bool isIce;
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uniform bool isUsePureColor;
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uniform vec4 pureColor;
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in vec3 posInEye;
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layout(location = 0) out vec4 fragColor;
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//锚点变色逻辑，高爽写得代码，逻辑没变，复制到这
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//变色有两种策略，一种是直接立刻变色s1，另一种是缓慢变色s2。保持原色为s0
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vec4 changeColorMethod(vec4 texColor){
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vec4 retColor = vec4(0.0);
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if(_changeColorCmd==0.0){
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if(isReplaceColor){
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if(isMixColor == 0){
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retColor = mix(texColor,replacedColor,1.0); //s1
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}else{
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retColor = mix(texColor,replacedColor,0.5); //s1
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}
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}else
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retColor = texColor; //s0
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}else if(_changeColorCmd==5.0){
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retColor = mix(texColor,replacedColor,_changeColorRatio);
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}else if(_changeColorCmd==6.0){
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retColor = mix(texColor,replacedColor,1.0-_changeColorRatio);
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}else if(_changeColorRatio==0.0){
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if(_changeColorCmd==1.0)
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retColor = mix(texColor,replacedColor,0.5);
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else
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retColor = texColor;
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}else{
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float d = mod(abs(_changeColorCmd), 2.0);
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vec4 tex_ = mix(texColor,replacedColor,0.5);
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float t = _changeColorCmd > 0.0 ? (d==1.0?_changeColorRatio:1.0-_changeColorRatio) : (d==1.0?1.0-_changeColorRatio:_changeColorRatio);
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if (t > _changeColorOff+0.2)
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retColor = d==1.0 ? tex_ : texColor;
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else if (t > _changeColorOff)
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{
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float k = d==1.0 ? 0.5-(_changeColorOff+0.2-t)/0.4 : (_changeColorOff+0.2-t)/0.4;
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retColor = replacedColor*k + texColor*(1.0-k);
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}
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else
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retColor = d==1.0 ? texColor : tex_;
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}
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return retColor;
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}
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void setLinearFog()
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{
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if(!isFogEnable)
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return;
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float distanceFromCamera = length(posInEye-cameraPos);
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if(distanceFromCamera<fogStart)
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return;
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float fogAlpha=(distanceFromCamera-fogStart)/(fogEnd-fogStart);
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fogAlpha=clamp(fogAlpha,0.0,1.0)*fogDensity;
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fragColor.rgb = mix(fragColor.rgb,fogColor,fogAlpha);
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}
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void setBlur()
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{
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if(!isBlurEnable)
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return;
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float distanceFromOrigin = length(posInEye-vec3(0.0,0.0,0.0));
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if(distanceFromOrigin<(blurStart*zoom))
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return;
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float blurAlpha= 1.0-exp(-(distanceFromOrigin/50.0));
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// float blurAlpha = smoothstep(distanceFromOrigin,blurStart*zoom,blurEnd*zoom);
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// float blurAlpha = (distanceFromOrigin - (blurStart*zoom)) / ((blurEnd*zoom) - (blurStart*zoom));
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blurAlpha=clamp(blurAlpha,0.0,1.0)*blurDensity;
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fragColor.rgb = mix(fragColor.rgb,blurColor,blurAlpha);
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}
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void main()
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{
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//点光源光照Blinn-Phong模型
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fragColor = texture(texId,fragTexCoord);
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return;
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vec3 L = normalize(fragEyePos - lightEyePos); //光源到此片元的方向
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vec3 N = normalize(fragEyeNormal); //此片元法线
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vec3 V = normalize(fragEyePos); //眼睛观察此片元的方向
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vec3 H = normalize(-L-V); //半向量
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float diffuse = max(dot(-L,N),0.0); //漫反射系数
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float specular = 0.0; //高光系数
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if(diffuse!=0.0)
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specular = pow(max(dot(H, N),0.0), specularPow); //高光系数
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vec4 oriColor=vec4(0.0); //片元原来的颜色
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vec4 baseColor=vec4(0.0);
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if(isUsePureColor)
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baseColor = pureColor;
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else
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baseColor = texture(texId,fragTexCoord);
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oriColor = changeColorMethod(baseColor * colorFac);
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fragColor = oriColor * (ambientColor + diffuseColor * diffuse) + specularColor * specular; //融合这几种颜色
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fragColor+=oriColor*vec4(0.3)*max(dot(vec3(0,0,1),N),0.0); //罗欢说模型屁股那太黑，给屁股那增加点颜色
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if(isIce)
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fragColor+=vec4(.0,.0,0.2,0.0);
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fragColor.a = oriColor.a;
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setLinearFog();
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setBlur();
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} |