raymarching
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Assets/raymarched/Raymarching.unity.meta
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Assets/raymarched/Raymarching.unity.meta
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192
Assets/raymarched/raymarch_origin copy.shader
Normal file
192
Assets/raymarched/raymarch_origin copy.shader
Normal file
|
|
@ -0,0 +1,192 @@
|
|||
Shader "CrispyPin/Raymarch1"
|
||||
{
|
||||
Properties
|
||||
{
|
||||
[Header(Raymarcher Properties)]
|
||||
_MaxSteps ("Max steps", Int) = 256
|
||||
_MaxDist ("Max distance", Float) = 100
|
||||
_SurfDist ("Surface distance threshold", Range(0.00001, 0.05)) = 0.001
|
||||
}
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||||
SubShader
|
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{
|
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Tags { "RenderType"="Opaque" }
|
||||
Cull Off
|
||||
LOD 100
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||||
|
||||
/* Pass{
|
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CGPROGRAM
|
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#pragma vertex vert
|
||||
#pragma fragment frag
|
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#include "UnityCG.cginc"
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struct appdata
|
||||
{
|
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float4 vertex : POSITION;
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};
|
||||
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||||
struct v2f
|
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{
|
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float4 vertex : SV_POSITION;
|
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float3 ro : TEXCOORD1;
|
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float3 hitPos : TEXCOORD2;
|
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};
|
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||||
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||||
v2f vert (appdata v)
|
||||
{
|
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v2f o;
|
||||
o.vertex = UnityObjectToClipPos(v.vertex);
|
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//object space
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o.ro = mul(unity_WorldToObject, float4(_WorldSpaceCameraPos, 1));
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o.hitPos = v.vertex;
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//world space
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//o.ro = _WorldSpaceCameraPos;
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//o.hitPos = mul(unity_ObjectToWorld, v.vertex);
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return o;
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}
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fixed4 frag (v2f i) : SV_Target
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{
|
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discard;
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return fixed4(0,0,0,0);
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}
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ENDCG
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} */
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Pass
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{
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Name "AddPass"
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Tags { "LightMode" = "ForwardAdd"}
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CGPROGRAM
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#pragma vertex vert
|
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#pragma fragment frag
|
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#include "UnityCG.cginc"
|
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|
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struct appdata
|
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{
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float4 vertex : POSITION;
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};
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struct v2f
|
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{
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float4 vertex : SV_POSITION;
|
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float3 ro : TEXCOORD1;
|
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float3 hitPos : TEXCOORD2;
|
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};
|
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|
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int _MaxSteps;
|
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float _MaxDist;
|
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float _SurfDist;
|
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|
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v2f vert (appdata v)
|
||||
{
|
||||
v2f o;
|
||||
o.vertex = UnityObjectToClipPos(v.vertex);
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//object space
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o.ro = mul(unity_WorldToObject, float4(_WorldSpaceCameraPos, 1));
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o.hitPos = v.vertex;
|
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//world space
|
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//o.ro = _WorldSpaceCameraPos;
|
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//o.hitPos = mul(unity_ObjectToWorld, v.vertex);
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return o;
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}
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|
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float smoothMin(float a, float b, float k)
|
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{
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return min(a, b) - pow(max(k - abs(a-b), 0), 3)/(6*k*k);
|
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}
|
||||
|
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float sdSphere(float3 p, float3 o, float r) {
|
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return length(p - o) - r;
|
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}
|
||||
|
||||
float sdBox(float3 p, float3 dim)
|
||||
{
|
||||
return length(float3(
|
||||
max(abs(p.x) - dim.x/2.0, 0),
|
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max(abs(p.y) - dim.y/2.0, 0),
|
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max(abs(p.z) - dim.z/2.0, 0)));
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}
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float3 repDomain(float3 p, float3 r)
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{
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return fmod(abs(p + r/2.0), r) - r/2.0;
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}
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||||
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float GetDist(float3 p)
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||||
{
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||||
/* float d = 0;
|
||||
|
||||
float s = sin(100*_Time + p.x*10) * 0.02 + 0.028;
|
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float s2 = cos(105*_Time + p.x*10) * 0.02 + 0.028;
|
||||
//s += sin(p.x/10)*0.03;
|
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|
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float3 rep = repDomain(p, float3(0.026, 0.15, 0.2));// fmod(abs(p + 0.05), 0.1)-0.05;
|
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d = sdBox(rep, float3(0.02, s2, s)) - 0.004;
|
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d = smoothMin(d, sdBox(rep, float3(0.01, s*1.0, s2*1.5)) - 0.004, 0.01);
|
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*/
|
||||
float d = sdSphere(p, 0, 0.1f);
|
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// float3 second = ObjSpaceLightDir(0);
|
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// float3 second = _WorldSpaceLightPos0;
|
||||
float3 second = mul(unity_WorldToObject, _WorldSpaceLightPos0);
|
||||
d = smoothMin(d, sdBox(p-second, 0.3f), 0.2);
|
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//d = smoothMin(d, sdSphere(p, float3(0,0,0), 5), .3);
|
||||
return d;
|
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}
|
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|
||||
//marches a ray through the scene
|
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float Raymarch(float3 ro, float3 rd)
|
||||
{
|
||||
float rayLen = 0;// total distance marched / distance from origin
|
||||
float dist; // distance from the raymarched scene
|
||||
for ( int i = 0; i < _MaxSteps; i++)
|
||||
{
|
||||
//position = origin + distance * direction
|
||||
float3 p = ro + rayLen * rd;
|
||||
dist = GetDist(p);
|
||||
rayLen += dist;// move forward
|
||||
if (dist < _SurfDist || rayLen > _MaxDist) {
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
return rayLen;
|
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}
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||||
|
||||
float3 GetNormal(float3 p)
|
||||
{
|
||||
float2 e = float2(0.001, 0);
|
||||
float3 n = GetDist(p) - float3(
|
||||
GetDist(p-e.xyy),
|
||||
GetDist(p-e.yxy),
|
||||
GetDist(p-e.yyx));
|
||||
return normalize(n);
|
||||
}
|
||||
|
||||
fixed4 frag (v2f i) : SV_Target
|
||||
{
|
||||
float3 ro = i.ro;
|
||||
float3 rd = normalize(i.hitPos - ro);
|
||||
|
||||
float d = Raymarch(ro, rd);
|
||||
fixed4 col = 1;
|
||||
|
||||
if (d >= _MaxDist)
|
||||
{
|
||||
discard;
|
||||
}
|
||||
float3 p = ro + rd * d;
|
||||
float3 n = GetNormal(p);
|
||||
|
||||
col.rgb = dot(n, normalize(float3(1,0.5,1)));
|
||||
col *= float4(d, 1, 1, 1);
|
||||
return col;
|
||||
}
|
||||
ENDCG
|
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}
|
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}
|
||||
}
|
||||
9
Assets/raymarched/raymarch_origin copy.shader.meta
Normal file
9
Assets/raymarched/raymarch_origin copy.shader.meta
Normal file
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@ -0,0 +1,9 @@
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fileFormatVersion: 2
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34
Assets/raymarched/raymarch_origin.shader
Normal file
34
Assets/raymarched/raymarch_origin.shader
Normal file
|
|
@ -0,0 +1,34 @@
|
|||
Shader "CrispyPin/Raymarch1"
|
||||
{
|
||||
Properties
|
||||
{
|
||||
[Header(Raymarcher Properties)]
|
||||
_MaxSteps ("Max steps", Int) = 256
|
||||
_MaxDist ("Max distance", Float) = 100
|
||||
_SurfDist ("Surface distance threshold", Range(0.00001, 0.05)) = 0.001
|
||||
}
|
||||
SubShader
|
||||
{
|
||||
Tags { "RenderType"="Opaque" }
|
||||
Cull Off
|
||||
LOD 100
|
||||
Pass
|
||||
{
|
||||
Tags { "LightMode" = "ForwardAdd"}
|
||||
CGPROGRAM
|
||||
#pragma vertex vertex
|
||||
#pragma fragment fragment
|
||||
|
||||
#include "raymarcher.cginc"
|
||||
|
||||
v2f vertex (appdata v){
|
||||
return vert(v);
|
||||
}
|
||||
|
||||
fragOut fragment (v2f i) {
|
||||
return frag(i);
|
||||
}
|
||||
ENDCG
|
||||
}
|
||||
}
|
||||
}
|
||||
9
Assets/raymarched/raymarch_origin.shader.meta
Normal file
9
Assets/raymarched/raymarch_origin.shader.meta
Normal file
|
|
@ -0,0 +1,9 @@
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fileFormatVersion: 2
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34
Assets/raymarched/raymarch_secondary.shader
Normal file
34
Assets/raymarched/raymarch_secondary.shader
Normal file
|
|
@ -0,0 +1,34 @@
|
|||
Shader "CrispyPin/Raymarch2"
|
||||
{
|
||||
Properties
|
||||
{
|
||||
[Header(Raymarcher Properties)]
|
||||
_MaxSteps ("Max steps", Int) = 256
|
||||
_MaxDist ("Max distance", Float) = 100
|
||||
_SurfDist ("Surface distance threshold", Range(0.00001, 0.05)) = 0.001
|
||||
}
|
||||
SubShader
|
||||
{
|
||||
Tags { "RenderType"="Opaque" }
|
||||
Cull Off
|
||||
LOD 100
|
||||
Pass
|
||||
{
|
||||
CGPROGRAM
|
||||
#pragma vertex vertex
|
||||
#pragma fragment fragment
|
||||
|
||||
#define IS_SECONDARY_SHAPE
|
||||
#include "raymarcher.cginc"
|
||||
|
||||
v2f vertex (appdata v){
|
||||
return vert(v);
|
||||
}
|
||||
|
||||
fragOut fragment (v2f i) {
|
||||
return frag(i);
|
||||
}
|
||||
ENDCG
|
||||
}
|
||||
}
|
||||
}
|
||||
9
Assets/raymarched/raymarch_secondary.shader.meta
Normal file
9
Assets/raymarched/raymarch_secondary.shader.meta
Normal file
|
|
@ -0,0 +1,9 @@
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fileFormatVersion: 2
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170
Assets/raymarched/raymarcher.cginc
Normal file
170
Assets/raymarched/raymarcher.cginc
Normal file
|
|
@ -0,0 +1,170 @@
|
|||
#ifndef RAY_MARCH_LIB_INCLUDED
|
||||
#define RAY_MARCH_LIB_INCLUDED
|
||||
/*
|
||||
define IS_SECONDARY_SHAPE to only render the second shape
|
||||
*/
|
||||
|
||||
#include "UnityCG.cginc"
|
||||
|
||||
struct appdata
|
||||
{
|
||||
float4 vertex : POSITION;
|
||||
};
|
||||
|
||||
struct v2f
|
||||
{
|
||||
float4 vertex : SV_POSITION;
|
||||
float3 ro : TEXCOORD1;
|
||||
float3 hitPos : TEXCOORD2;
|
||||
};
|
||||
|
||||
struct fragOut
|
||||
{
|
||||
fixed4 col : SV_Target;
|
||||
float depth : SV_Depth;
|
||||
};
|
||||
|
||||
int _MaxSteps;
|
||||
float _MaxDist;
|
||||
float _SurfDist;
|
||||
|
||||
v2f vert (appdata v) {
|
||||
v2f o;
|
||||
o.vertex = UnityObjectToClipPos(v.vertex);
|
||||
//object space
|
||||
o.ro = mul(unity_WorldToObject, float4(_WorldSpaceCameraPos, 1));
|
||||
o.hitPos = v.vertex;
|
||||
//world space
|
||||
//o.ro = _WorldSpaceCameraPos;
|
||||
//o.hitPos = mul(unity_ObjectToWorld, v.vertex);
|
||||
return o;
|
||||
}
|
||||
|
||||
float smin(float a, float b, float k) {
|
||||
return min(a, b) - pow(max(k - abs(a-b), 0), 3)/(6*k*k);
|
||||
}
|
||||
|
||||
float sdSphere(float3 p, float3 o, float r) {
|
||||
return length(p - o) - r;
|
||||
}
|
||||
|
||||
float sdBox(float3 p, float3 dim) {
|
||||
return length(float3(
|
||||
max(abs(p.x) - dim.x/2.0, 0),
|
||||
max(abs(p.y) - dim.y/2.0, 0),
|
||||
max(abs(p.z) - dim.z/2.0, 0)));
|
||||
}
|
||||
|
||||
float sdLine(float3 p, float3 a, float3 b, float r) {
|
||||
float3 pa = p - a;
|
||||
float3 ba = b - a;
|
||||
float h = clamp(dot(pa, ba) / dot(ba, ba), 0, 1);
|
||||
return length(pa - ba * h) - r;
|
||||
}
|
||||
|
||||
float sdCappedTorus( float3 p, float2 sc, float ra, float rb) {
|
||||
p.x = abs(p.x);
|
||||
float k = (sc.y*p.x>sc.x*p.y) ? dot(p.xy,sc) : length(p.xy);
|
||||
return sqrt( dot(p,p) + ra*ra - 2.0*ra*k ) - rb;
|
||||
}
|
||||
|
||||
float3 RotateY(float3 p, float a) {
|
||||
return mul(float3x3(cos(a), 0, sin(a), 0, 1, 0, -sin(a), 0, cos(a)), p);
|
||||
}
|
||||
|
||||
float Kijetesantakalu(float3 p, float r) {
|
||||
float d = sdSphere(p, float3(0, 0, 0.2f), r);// left eye
|
||||
d = min(d, sdSphere(p, float3(0.15f, 0, 0.2f), r)); // right eye
|
||||
d = min(d, sdLine(p, float3(0, 0, -0.4f), float3(-0.35f, 0, -0.4f), r)); // bottom line
|
||||
d = smin(d, sdLine(p, float3(0, 0, -0.4f), float3(-0.1f, 0, -0.15f), r), 0.003f); // leg hook
|
||||
d = min(d, sdLine(p, float3(0.15f, 0, -0.4f), float3(0.15f, 0, -0.1f), r)); // middle leg
|
||||
d = min(d, sdLine(p, float3(0.3f, 0, -0.4f), float3(0.3f, 0, 0), r)); // front leg
|
||||
d = smin(d, sdLine(p, float3(0.45f, 0, 0.1f), float3(0.3f, 0, 0), r), 0.003f); // lower snout
|
||||
d = smin(d, sdLine(p, float3(0.45f, 0, 0.1f), float3(0.2f, 0, 0.35f), r), 0.003f); // upper snout
|
||||
d = smin(d, sdLine(p, float3(0.2f, 0, 0.45f), float3(0.2f, 0, 0.35f), r), 0.003f); // ear
|
||||
float an = 0.9;
|
||||
d = smin(d, sdCappedTorus((RotateY(p, 0.8f) - float3(0.15f, 0, -0.05f)).xzy, float2(sin(an),cos(an)), 0.4, r), 0.003f); // ear
|
||||
d = smin(d, sdLine(p, float3(-0.25f, 0, 0), float3(-0.25f, 0, -0.4f), r), 0.003f); // back
|
||||
d = smin(d, sdLine(p, float3(-0.25f, 0, -0.1f), float3(-0.35f, 0, -0.1f), r), 0.003f); // tail top
|
||||
d = smin(d, sdLine(p, float3(-0.35f, 0, -0.1f), float3(-0.35f, 0, -0.4f), r), 0.003f); // stripe
|
||||
an = 3.1415f*0.5;
|
||||
d = smin(d, sdCappedTorus((RotateY(p, an) - float3(-0.25f, 0, 0.35f)).xzy, float2(sin(an),cos(an)), 0.15f, r), 0.003f); // tail
|
||||
|
||||
return d;
|
||||
}
|
||||
|
||||
float FirstShape(float3 p) {
|
||||
return Kijetesantakalu(p, 0.05f);
|
||||
}
|
||||
|
||||
float SecondShape(float3 p) {
|
||||
// return sdBox(p, 0.3f) - 0.01f;
|
||||
// return Kijetesantakalu(p, 0.04f) - 0.01f;
|
||||
return sdSphere(p, 0, 0.3f);
|
||||
}
|
||||
|
||||
|
||||
float GetDist(float3 p) {
|
||||
#ifdef IS_SECONDARY_SHAPE
|
||||
return SecondShape(p);
|
||||
#else
|
||||
float first = FirstShape(p);
|
||||
float3 second_pos = mul(unity_WorldToObject, _WorldSpaceLightPos0);
|
||||
float second = SecondShape(p - second_pos);
|
||||
return smin(first, second, 0.15f);
|
||||
#endif
|
||||
}
|
||||
|
||||
//marches a ray through the scene
|
||||
float Raymarch(float3 ro, float3 rd) {
|
||||
float rayLen = 0;// total distance marched / distance from origin
|
||||
float dist; // distance from the raymarched scene
|
||||
for ( int i = 0; i < _MaxSteps; i++)
|
||||
{
|
||||
//position = origin + distance * direction
|
||||
float3 p = ro + rayLen * rd;
|
||||
dist = GetDist(p);
|
||||
rayLen += dist;// move forward
|
||||
if (dist < _SurfDist || rayLen > _MaxDist) {
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
return rayLen;
|
||||
}
|
||||
|
||||
float3 GetNormal(float3 p) {
|
||||
float2 e = float2(0.001, 0);
|
||||
float3 n = GetDist(p) - float3(
|
||||
GetDist(p-e.xyy),
|
||||
GetDist(p-e.yxy),
|
||||
GetDist(p-e.yyx));
|
||||
return normalize(n);
|
||||
}
|
||||
|
||||
fragOut frag (v2f i) {
|
||||
float3 ro = i.ro;
|
||||
float3 rd = normalize(i.hitPos - ro);
|
||||
|
||||
float d = Raymarch(ro, rd);
|
||||
fixed4 col = 1;
|
||||
|
||||
if (d >= _MaxDist)
|
||||
{
|
||||
discard;
|
||||
}
|
||||
float3 p = ro + rd * d;
|
||||
float3 n = GetNormal(p);
|
||||
|
||||
// col.rgb = max(dot(n, normalize(float3(1,0.5,1))), 0.05f);
|
||||
col.r = dot(-rd, n);
|
||||
|
||||
// col *= float4(d, 1, 1, 1);
|
||||
fragOut o;
|
||||
o.col = col;
|
||||
float4 vClipPos = mul(UNITY_MATRIX_VP, mul(unity_ObjectToWorld, float4(p, 1)));
|
||||
o.depth = (vClipPos.z / vClipPos.w + 1.0) * 0.5;
|
||||
return o;
|
||||
}
|
||||
|
||||
#endif
|
||||
9
Assets/raymarched/raymarcher.cginc.meta
Normal file
9
Assets/raymarched/raymarcher.cginc.meta
Normal file
|
|
@ -0,0 +1,9 @@
|
|||
fileFormatVersion: 2
|
||||
guid: 5ee593b026d03ab61b5bbf93bce72808
|
||||
ShaderImporter:
|
||||
externalObjects: {}
|
||||
defaultTextures: []
|
||||
nonModifiableTextures: []
|
||||
userData:
|
||||
assetBundleName:
|
||||
assetBundleVariant:
|
||||
|
|
@ -36,7 +36,7 @@ TagManager:
|
|||
-
|
||||
-
|
||||
-
|
||||
-
|
||||
- raymarching
|
||||
m_SortingLayers:
|
||||
- name: Default
|
||||
uniqueID: 0
|
||||
|
|
|
|||
Loading…
Reference in a new issue