GE Lua Documentation

setShaderConsts

Definition

-- @/lua/ge/client/postFx/dof.lua:452

dOFPostEffectCallbacks.setShaderConsts = function()
  local dofPostEffect = scenetree.findObject("DOFPostEffect")
  if not dofPostEffect or not dofPostEffect.focalDist then
    return
  end

  if dofPostEffect.autoFocusEnabled == true then
    -- log('I','dof', ' setShaderConsts dofPostEffect = '..dumps(dofPostEffect))
    -- log('I','dof', '     dof = '..dumps(dof))
    autoFocus(dofPostEffect)
  end

  local farDist = tonumber(TorqueScriptLua.getVar("$Param::FarDist"))
  local fd = dofPostEffect.focalDist / farDist

  -- rangeNear is done in two phases, so that it can be clamped with rangeFar
  local rangeNearTemp = lerp(dofPostEffect.minRange, dofPostEffect.maxRange, fd) / farDist * 0.5
  local rangeFar = lerp(dofPostEffect.maxRange, dofPostEffect.minRange, fd) / farDist * 0.5
  local rangeNear = clamp(rangeNearTemp, 0, rangeFar)

  -- We work in "depth" space rather than real-world units for the
  -- rest of this method...

  -- Given the focal distance and the range around it we want in focus
  -- we can determine the near-end-distance and far-start-distance

  -- Original code was broken, so instead we re-use fsd
  -- %ned = getMax( %fd - %range, 0.0 );

  local ned = math.min(fd + rangeNear, 1.0)
  local fsd = math.min(fd + rangeFar, 1.0)

  -- nearSlope
  local nsl = dofPostEffect.nearSlope

  -- Given slope of near blur equation and the near end dist and amount (x2,y2)
  -- solve for the y-intercept
  -- y = mx + b
  -- so...
  -- y - mx = b

  local b = 0.0 - nsl * ned
  local eqNear = string.format("%f %f 0.0", nsl, b)

  -- Do the same for the far blur equation...
  local fsl = dofPostEffect.farSlope
  b = 0.0 - fsl * fsd
  local eqFar = string.format("%f %f 1.0", fsl, b)

  -- Exposed the variables to the shader
  local dofFinalPFX = scenetree.findObject("DOFFinalPFX")
  if dofFinalPFX then
    dofFinalPFX:setShaderConst("$dofEqWorld", eqNear)
    dofFinalPFX:setShaderConst("$dofEqFar", eqFar)
    dofFinalPFX:setShaderConst("$maxWorldCoC", dofPostEffect.nearBlurMax)
    dofFinalPFX:setShaderConst("$maxFarCoC", dofPostEffect.farBlurMax)
    dofFinalPFX:setShaderConst("$dofLerpScale", dofPostEffect.lerpScale)
    dofFinalPFX:setShaderConst("$dofLerpBias", dofPostEffect.lerpBias)
    dofFinalPFX:setShaderConst("$isDebugMode", dofPostEffect.debugModeEnabled and "1" or "0") -- send "1" for true and "0" for false
  end
end

Callers