Transferring Shadertoy to TouchDesigner - opengl

Question

I'm transferring some openGL out of Shadertoy into TouchDesigner. I think the problem lies with "Use of undeclared identifier 'wave'" as I have already made the most obvious adaptations.
layout(location = 0) out vec4 fragColor;
uniform vec2 iResolution;
uniform float iTime;
uniform vec4 iMouse;
float material;
float rng;
float map (vec3 p)
{
// time stretched with noise
float t = iTime*1. + rng*0.9;
// domain repetition
float grid = 5.;
vec3 cell = floor(p/grid);
p = repeat(p,grid);
// distance from origin
float dp = length(p);
// rotation parameter
vec3 angle = vec3(.1,-.5,.1) + dp*.5 + p*.1 + cell;
// shrink sphere size
float size = sin(rng*3.14);
// stretch sphere
float wave = sin(-dp*1.+t+hash13(cell)*6.28)*.5;
// kaleidoscopic iterated function
const int count = 4;
float a = 1.0;
float scene = 1000.;
float shape = 1000.;
for (int index = 0; index < count; ++index)
{
// fold and translate
p.xz = abs(p.xz)-(.5+wave)*a;
// rotate
p.xz *= rot(angle.y/a);
p.yz *= rot(angle.x/a);
p.yx *= rot(angle.z/a);
// sphere
shape = length(p)-0.2*a*size;
// material blending
material = mix(material, float(index), smoothing(shape, scene, 0.3*a));
// add with a blend
scene = smin(scene, shape, 1.*a);
// falloff transformations
a /= 1.9;
}
return scene;
}
// return color from pixel coordinate
void main()
{
// reset color
fragColor = vec4(0,0,0,1);
material = 0.0;
// camera coordinates
vec2 uv = (gl_FragCoord.xy - iResolution.xy * 0.5) / iResolution.y;
vec3 eye = vec3(1,1,1.);
vec3 at = vec3(0,0,0);
vec3 z = normalize(at-eye);
vec3 x = normalize(cross(z, vec3(0,1,0)));
vec3 y = cross(x, z);
vec3 ray = normalize(vec3(z + uv.x * x + uv.y * y));
vec3 pos = eye;
// camera control
vec2 M = 6.28*(iMouse.xy-.5);
ray.xz *= rot(M.x), pos.xz *= rot(M.x);
ray.xy *= rot(M.y), pos.xy *= rot(M.y);
// white noise
vec3 seed = vec3(gl_FragCoord.xy, iTime);
rng = hash13(seed);
// raymarch
const float steps = 30.0;
float index;
for (index = steps; index > 0.0; --index)
{
// volume estimation
float dist = map(pos);
if (dist < 0.01)
{
break;
}
// dithering
dist *= 0.9 + .1 * rng;
// raymarch
pos += ray * dist;
}
// ambient occlusion from steps count
float shade = index/steps;
// compute normal by NuSan (https://www.shadertoy.com/view/3sBGzV)
vec2 off=vec2(.001,0);
vec3 normal = normalize(map(pos)-vec3(map(pos-off.xyy), map(pos-off.yxy), map(pos-off.yyx)));
// Inigo Quilez color palette (https://iquilezles.org/www/articles/palettes/palettes.htm)
vec3 tint = .5+.5*cos(vec3(3,2,1)+material*.5+length(pos)*.5);
// lighting
float ld = dot(reflect(ray, normal), vec3(0,1,0))*0.5+0.5;
vec3 light = vec3(1.000,0.502,0.502) * sqrt(ld);
ld = dot(reflect(ray, normal), vec3(0,0,-1))*0.5+0.5;
light += vec3(0.400,0.714,0.145) * sqrt(ld)*.5;
// pixel color
fragColor.rgb = (tint + light) * shade;
// temporal buffer
fragColor = max(fragColor, texture(sTD2DInputs[0], gl_FragCoord.xy/iResolution.xy) - 0.01);
}
Pixel Shader Compile Results:
ERROR: 0:26: Invalid call of undeclared identifier 'repeat'
ERROR: 0:38: Invalid call of undeclared identifier 'hash13'
ERROR: 0:48: Use of undeclared identifier 'wave'
ERROR: 0:51: Invalid call of undeclared identifier 'rot'
ERROR: 0:52: Invalid call of undeclared identifier 'rot'
ERROR: 0:53: Invalid call of undeclared identifier 'rot'
ERROR: 0:59: Invalid call of undeclared identifier 'smoothing'
ERROR: 0:62: Invalid call of undeclared identifier 'smin'
ERROR: 0:90: Invalid call of undeclared identifier 'rot'
ERROR: 0:90: Invalid call of undeclared identifier 'rot'
ERROR: 0:91: Invalid call of undeclared identifier 'rot'
ERROR: 0:91: Invalid call of undeclared identifier 'rot'
ERROR: 0:95: Invalid call of undeclared identifier 'hash13'

Answer 1

If this is the shader you're trying to run, notice it's using a buffer (two passes) which might have missed.
Checkout this video which in the second half shows to handle a shadertoy shader that uses a buffer (similar to yours).