Open alexNecroJack opened 3 years ago
Hey @alexNecroJack I converted your shader to unity
Shader "Hidden/Test"
{
Properties
{
_MainTex ("Texture", 2D) = "white" {}
}
SubShader
{
// No culling or depth
Cull Off ZWrite Off ZTest Always
Pass
{
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#include "UnityCG.cginc"
struct appdata
{
float4 vertex : POSITION;
float2 uv : TEXCOORD0;
};
struct v2f
{
float2 uv : TEXCOORD0;
float4 vertex : SV_POSITION;
};
v2f vert (appdata v)
{
v2f o;
o.vertex = UnityObjectToClipPos(v.vertex);
o.uv = v.uv;
return o;
}
sampler2D _MainTex;
// Star Nest by Pablo Roman Andrioli
// This content is under the MIT License.
#define iterations 17
#define formuparam 0.53
#define volsteps 20
#define stepsize 0.1
#define zoom 0.800
#define tile 0.850
#define speed 0.010
#define brightness 0.0015
#define darkmatter 0.300
#define distfading 0.730
#define saturation 0.850
float4 iMouse;
fixed4 frag (v2f i) : SV_Target
{
//get coords and direction
fixed2 uv=i.uv.xy;
fixed3 dir=fixed3(uv*zoom,1.);
float time=_Time.y*speed+.25;
//mouse rotation
float a1=.5+iMouse.x;
float a2=.8+iMouse.y;
fixed2x2 rot1=fixed2x2(cos(a1),sin(a1),-sin(a1),cos(a1));
fixed2x2 rot2=fixed2x2(cos(a2),sin(a2),-sin(a2),cos(a2));
dir.xz = mul(rot1,dir.xz);
dir.xz = mul(rot2,dir.xz);
fixed3 from=fixed3(1.,.5,0.5);
from+=fixed3(time*2.,time,-2.);
from.xz = mul(rot1,from.xz);
from.xy = mul(rot2,from.xy);
//volumetric rendering
float s=0.1,fade=1.;
fixed3 v=fixed3(0.,0.,0.);
for (int r=0; r<volsteps; r++) {
fixed3 p=from+s*dir*.5;
p = abs(fixed3(tile,tile,tile)-fmod(p,fixed3(tile*2.,tile*2.,tile*2.))); // tiling fold
float pa,a=pa=0.;
for (int i=0; i<iterations; i++) {
p=abs(p)/dot(p,p)-formuparam; // the magic formula
a+=abs(length(p)-pa); // absolute sum of average change
pa=length(p);
}
float dm=max(0.,darkmatter-a*a*.001); //dark matter
a*=a*a; // add contrast
if (r>6) fade*=1.-dm; // dark matter, don't render near
//v+=fixed3(dm,dm*.5,0.);
v+=fade;
v+=fixed3(s,s*s,s*s*s*s)*a*brightness*fade; // coloring based on distance
fade*=distfading; // distance fading
s+=stepsize;
}
v=lerp(fixed3(length(v),length(v),length(v)),v,saturation); //color adjust
return fixed4(v*.01,1.);
}
ENDCG
}
}
}
The error is as described in this post: https://forum.unity.com/threads/using-transformation-matrix-leads-to-type-mismatch.466548/
I met the error trying to convert this shader: https://www.shadertoy.com/view/XlfGRj
The actual code part in which the bug lies was the following. After conversion I was given:
While the last line from the result as shown above, should be like this in order to work in Unity: