Winestealth shader for NotITG

definemod.lua

--acts exactly like stealth
definemod{'winestealth', function(percent, pn)
  if not P[pn] then return end
  local a = 0.02*math.min(100 - percent, 50)
  local w = 0.02*math.min(percent, 50)
  local shader = winestealth:GetShader()
  shader:uniform1f('a', a)
  shader:uniform1f('w', w)
  if not P[pn]:GetArrowShader() and percent > 0 then
    P[pn]:SetArrowShader(shader)
  elseif percent <= 0 then
    P[pn]:ClearArrowShader()
  end
end}

winestealth.frag

//Originally written by BrotherMojo

#version 120

uniform float a; //alpha
uniform float w; //white

varying vec2 textureCoord;
uniform vec2 textureSize;
uniform sampler2D sampler0;

void main() {
  vec4 texColor = texture2D(sampler0, textureCoord);
  gl_FragColor = vec4(1.0, 1.0, 1.0, texColor[3]) * w + texColor * (1.0 -w);
  gl_FragColor[3] = gl_FragColor[3] * a;
}

NOTE: In NotITG versions later than 4.3.0, normal stealth will render properly on wine.

OTHER NOTE: This can still be used for stealth-like behavior for non-arrows, with minor modification to the definemod.