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Hi, I was attempting to implement Zap's halftone OSL texture in vray using VrayOSLTex map. It fails to compile due to a a line that attempts to smoothstep give 2 floats and a color. The spec clearly allows for this:
and it obviously works in arnold. Is this not supported in Vray?
type smoothstep (type edge0, type edge1, type x)
Returns 0 if x ≤ edge0, and 1 if x ≥ edge1, and performs a smooth Hermite interpolation between 0 and 1 when edge0 < x < edge1. This is useful in cases where you would want a thresholding function with a smooth transition. The type may be any of of float, color, point, vector, or normal. For color and point-like types, the computations are performed component-by-component.
Returns 0 if x ≤ edge0, and 1 if x ≥ edge1, and performs a smooth Hermite interpolation between 0 and 1 when edge0 < x < edge1. This is useful in cases where you would want a thresholding function with a smooth transition. The type may be any of of float, color, point, vector, or normal. For color and point-like types, the computations are performed component-by-component.
Code:
// A simple Halftone shader
// Halftone.osl, by Zap Andersson
// Modified: 2018-06-28
// Copyright 2018 Autodesk Inc, All rights reserved. This file is licensed under Apache 2.0 license
// https://github.com/ADN-DevTech/3dsMax-OSL-Shaders/blob/master/LICENSE.txt
shader HalftoneDots
[[ string help="Halftone Dots (by default i screen space)<br>"
"Works well together with toon shaders.",
string label = "Halftone Dots" ]]
(
// Inputs
vector UVW = transform("raster", P)
[[ string help = "The input coordinate. If not connected, uses screen pixel space" ]],
vector Scale = vector(8.0,8.0,8.0)
[[ string help = "This size of the dots. In the default screen space mapping, this is in pixels." ]],
float Angle = 45.0
[[ string help = "Angle of the Halftoning" ]],
color InputValue = 0.25
[[ string help = "The input value defining the size of the dots to yield the right halftone density. " ]],
int U_Input = 0
[[ string help = "If checked, adds the U coordinate as the input value. This works "
"well when connected in a 'base_tonemap' input of an Arnold Toon shader.",
string widget = "checkBox" ]],
float Fuzz = 0.1 [[ float min = 0.0, float max = 2.0 ]],
color BlackDots = 0.0
[[ string help = "The color of the dots" ]],
color WhiteDots = 1.0
[[ string help = "The color of the space between the dots" ]],
// Outputs
output color Out = 0.0
)
{
vector pos = rotate(UVW, radians(Angle), 0.0, vector(0.0,0.0,1.0));
pos = vector(pos[0] / Scale[0], pos[1] / Scale[1], 0.0);
if (Scale[0] == 0.0)
pos[0] = 0.5;
if (Scale[1] == 0.0)
pos[1] = 0.5;
color inputV = InputValue;
if (U_Input)
inputV += u;
pos = pos - floor(pos);
float dist = 1.0 - (distance(vector(0.5,0.5,0.0), pos) / (sqrt(2.0) / 2.5));
color factor = smoothstep(-Fuzz, 0.0, inputV - sqrt(max(0,dist)));
Out = mix(BlackDots, WhiteDots, factor);
}
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