williamchange

/*
    OSL Triangle Voronoi Borders

    Based on a shadertoy by Thomas Hooper(tdhooper):
    https://www.shadertoy.com/view/ss3fW4
*/

vector fract(vector v) { return mod(v*.5,.5)*2.; }

vector vstep(vector a, vector b) {

williamchange

// Based on "Triangle Voronoi Borders" by Thomas Hooper (@tdhooper)
// https://www.shadertoy.com/view/ss3fW4
struct Functions
{
    float3 sdTriEdges(float2 p) {
        return float3(
            dot(p, float2(0.,-1.)),
            dot(p, float2(.866025, .5)),
            dot(p, float2(-.866025, .5))
        );

williamchange

# ##### BEGIN GPL LICENSE BLOCK #####
#
#  This program is free software; you can redistribute it and/or
#  modify it under the terms of the GNU General Public License
#  as published by the Free Software Foundation; either version 2
#  of the License, or (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTIBILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#

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# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTIBILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#

williamchange

struct Functions {

    // 3d gradient noise from iq
    // https://www.shadertoy.com/view/Xsl3Dl
    float3 hash( float3 p )
    {
        p = float3( dot(p,float3(127.1,311.7, 74.7)),
                    dot(p,float3(269.5,183.3,246.1)),
                    dot(p,float3(113.5,271.9,124.6)));