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abesmon/FakeLiquid.frag

Last active April 28, 2021 08:10
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  1. abesmon revised this gist Feb 23, 2021. No changes.
  2. abesmon created this gist Feb 23, 2021.
    40 changes: 40 additions & 0 deletions FakeLiquid.frag
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    Original file line number Diff line number Diff line change
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    uniform vec3 uLine;
    uniform vec4 uLiquidColor;
    uniform float uLineHeight;
    uniform float uFrenelPow;

    in Vert {
    vec3 objectPoint;
    vec3 normalForCam;
    } iVert;

    out vec4 fragColor;
    void main()
    {
    TDCheckDiscard();

    vec4 color = vec4(0.0);
    float frenel = 1 - dot(vec3(0.0, 0.0, 1.0), iVert.normalForCam);
    if (iVert.objectPoint.y < uLine.z) {
    if (gl_FrontFacing) {
    if (uLine.z - iVert.objectPoint.y < uLineHeight) {
    vec3 ringColorHSV = TDRGBToHSV(uLiquidColor.rgb);
    ringColorHSV.y -= 0.5;
    ringColorHSV.z += 0.5;
    color = vec4(TDHSVToRGB(ringColorHSV), uLiquidColor.a);
    } else {
    vec3 mainColorHSV = TDRGBToHSV(uLiquidColor.rgb);
    mainColorHSV.z += pow(frenel, uFrenelPow);
    color = vec4(TDHSVToRGB(mainColorHSV), uLiquidColor.a);
    }
    } else {
    vec3 capColorHSV = TDRGBToHSV(uLiquidColor.rgb);
    capColorHSV.y -= 0.7;
    capColorHSV.z += 0.5;
    color = vec4(TDHSVToRGB(capColorHSV), uLiquidColor.a);
    }
    }

    TDAlphaTest(color.a);
    fragColor = TDOutputSwizzle(color);
    }
    30 changes: 30 additions & 0 deletions FakeLiquid.vert
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    uniform vec3 uWobbleAngle;
    uniform float uGlassWidth;

    out Vert {
    vec3 objectPoint;
    vec3 normalForCam;
    } oVert;

    mat3 rotateZ(float _angle) {
    return mat3(cos(_angle),-sin(_angle), 0.0,
    sin(_angle),cos(_angle), 0.0,
    0.0, 0.0, 1.0);
    }

    mat3 rotateX(float _angle) {
    return mat3(1.0, 0.0, 0.0,
    0.0, cos(_angle), -sin(_angle),
    0.0, sin(_angle), cos(_angle));
    }

    void main()
    {
    vec3 scaledPoint = P - (N * uGlassWidth);
    oVert.objectPoint = scaledPoint;
    oVert.objectPoint = rotateZ(uWobbleAngle.z) * oVert.objectPoint;
    oVert.objectPoint = rotateX(uWobbleAngle.x) * oVert.objectPoint;
    oVert.normalForCam = uTDMats[TDCameraIndex()].camForNormals * N;
    vec4 worldSpacePos = TDDeform(scaledPoint);
    gl_Position = TDWorldToProj(worldSpacePos);
    }