interpolateAtOffset - sample a varying at specified offset from the center of a pixel

       Copyright © 2011-2014 Khronos Group

[FIXME: source]                                    11/18/2024                            INTERPOLATEATOFFSET(3G)

floatinterpolateAtOffset(floatinterpolant,vec2offset);vec2interpolateAtOffset(vec2interpolant,vec2offset);vec3interpolateAtOffset(vec3interpolant,vec2offset);vec4interpolateAtOffset(vec4interpolant,vec2offset);

interpolateAtOffset returns the value of the input varying interpolant sampled at an offset from the
       center of the pixel specified by offset. The two floating-point components of offset give the offset in
       pixels in the x and y directions from the center of the pixel, respectively. An offset of (0, 0)
       identifies the center of the pixel. The range and granularity of offsets supported by this function is
       implementation-dependent.

       interpolateAtOffset - sample a varying at specified offset from the center of a pixel

interpolant
           Specifies the interpolant to be sampled at the specified offset.

       offset
           Specifies the offset from the center of the pixel at which to sample interpolant.

interpolateAtCentroid(), interpolateAtSample()

       ┌──────────────────────┬───────────────────────────────────────────────────────────────────────────────────┐
       │                      │        OpenGLShadingLanguageVersion                                            │
       ├──────────────────────┼──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┤
       │ Function             │ 1.10 │ 1.20 │ 1.30 │ 1.40 │ 1.50 │ 3.30 │ 4.00 │ 4.10 │ 4.20 │ 4.30 │ 4.40 │ 4.50 │
       │ Name                 │      │      │      │      │      │      │      │      │      │      │      │      │
       ├──────────────────────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┤
       │ interpolateAtoOffset │  -   │  -   │  -   │  -   │  -   │  -   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │
       └──────────────────────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┘