add wip raymarching shaders

This commit is contained in:
Crispy 2023-07-29 21:05:57 +02:00
parent 58f266d600
commit 3408d9ff8e
17 changed files with 1242 additions and 103 deletions

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- _SunCol: {r: 1, g: 0.5988961, b: 0.05098039, a: 1}
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Shader "CrispyPin/Spinny_Sunset"
{
Properties
{
[Header(Raymarcher Properties)]
_MaxSteps ("Max steps", Int) = 128
_MaxDist ("Max distance", Float) = 128
_SurfDist ("Surface distance threshold", Range(0.0001, 0.05)) = 0.001
[Header(Sky)]
_SkyCol ("Sky color", Color) = (0.22, 0.23, 0.58, 1.0)
_HorizonTint ("Horizon tint", Range(0, 1)) = 0.1
[Header(Sun)]
_SunCol ("Sun color", Color) = (1.0, 0.65, 0.05, 1.0)
_SunAngle ("Sun angle", Range(0, 6.28)) = 0
_SunRadius ("Sun radius", Range(0, 0.3)) = 0.06
_SunCutoff ("Sun cutoff", Range(0, 0.5)) = 0.08
[Header(Star Layout)]
[NoScaleOffset]
_NoiseTex ("Noise source", 2D) = "white" {}
_StarDensity ("Star density", Range(4, 50)) = 20
_StarRandom ("Star randomness", Range(0, 1)) = 0.85
[Header(Star)]
_StarsMissing ("Stars missing", Range(0, 1)) = 0.75
_StarSize ("Star size", Range(0, 0.1)) = 0.06
_StarSizeRandom ("Star size randomness", Range(0, 1)) = 0.5
_StarTint ("Star tint", Range(0, 1)) = 0.4
[Header(Water)]
_HeightOffset ("Height offset", Range(-10, 10)) = -0.5
_WaterCol ("Water color", Color) = (0.03, 0.08, 0.12, 1.0)
_WaveStrength ("Wave scale", Range(0, 1)) = 1
_WaveSpeed ("Wave speed", Range(0, 5)) = 1
[NoScaleOffset]
_WaterNormal ("Surface Normal", 2D) = "white" {}
[Header(Debug)]
_Grid ("Grid visibility", Range(0, 1)) = 0
}
SubShader
{
Tags { "RenderType"="Opaque" }
LOD 100
Cull front
Pass
{
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
int _MaxSteps;
float _MaxDist;
float _SurfDist;
#define MAX_STEPS 512
#define MAX_DIST _MaxDist
#define SURF_DIST _SurfDist
#define LIGHT_FN lighting
#define SCENE_FN main
#define REFLECTIONS 3
#define SCENE_SCALE 0.025
#define LIMIT_DEPTH_TO_MESH
#include "lib/libgarbage.cginc"
#define PI 3.1416f
#define WHITE 1
#define UP float3(0, 1, 0)
sampler2D _NoiseTex;
float3 _SkyCol;
float _HorizonTint;
float _StarsMissing;
float _StarDensity;
float _StarRandom;
float _StarSize;
float _StarSizeRandom;
float _StarTint;
float3 _SunCol;
float _SunAngle;
float _SunRadius;
float _SunCutoff;
sampler2D _WaterNormal;
// sampler2D _WaterHeight;
// sampler2D _WaterAO;
float3 _WaterCol;
float _HeightOffset;
float _WaveStrength;
float _WaveSpeed;
float _Grid;
float3 get_water_normal(float2 pos) {
pos *= 0.5;
float time = _Time.x * _WaveSpeed + 5; // offset is to make it look better at frame 0
float t1 = time * 0.18;
float3 normal = (tex2D(_WaterNormal, pos + float2(t1, -t1 * 0.5)) - 0.5) * 0.5;
float t2 = time * 0.37;
normal += (tex2D(_WaterNormal, pos * 0.276 + float2(t2 * 0.8, t2)) - 0.5);
float t3 = time * 0.08;
normal += (tex2D(_WaterNormal, pos * 0.07 + float2(t3 * 0.8, -t3)) - 0.5);
// normal = normalize(normal.zxy); // normal map import settings
normal = normalize(normal.rbg) * float3(-1, 1, -1); // standard import settings
// normal = normalize(normal);
// return UP;
return lerp(UP, normal, _WaveStrength);
}
float3 sun(float3 base_col, float3 dir, float3 sun_dir) {
float alignment = min(acos(dot(dir, sun_dir)), 1);
float sun_amount = smax(min(_SunRadius / alignment, 5) - _SunCutoff, 0, 0.15);
return lerp(base_col, _SunCol, sun_amount);
}
float3 sky(float3 dir, float3 sun_dir) {
float theta = atan2(dir.x, dir.z); // latitude
float phi = asin(dir.y); // longitude
/// background
float factor = smoothstep(0, 0.5, dir.y + 0.2);
float3 horizon_col = lerp(_SkyCol, _SunCol, _HorizonTint);
float3 col = lerp(horizon_col, _SkyCol, factor);
/// stars
float2 cells = float2(-1, floor(_StarDensity));
float cell_x_base = floor(cells.y * PI);
float celly = phi * cells.y;
// cells per ring depend on y pos, to reduce warping around the poles:
cells.x = floor(cos(floor(celly) / _StarDensity) * cell_x_base);
float cellx = (theta / PI * cells.x);
float2 pos = float2(cellx, celly); // cell-space pos of this pixel
float2 cell_pos = float2(floor(cellx), floor(celly)); // position of this cell
float2 cell_center = cell_pos + 0.5;
float2 star_pos = cell_center + (tex2D(_NoiseTex, cell_pos / cells + float2(0, 0.1)) - 0.5) * _StarRandom;
/// star color
float3 r = tex2D(_NoiseTex, cell_pos / cells);
float rnum = frac((r.r + r.g - r.b) * 10);
float rnum2 = frac((r.r - r.g + r.b) * 10);
float star_size = _StarSize * (rnum * _StarSizeRandom + (1 - _StarSizeRandom));
float distance = length(pos - star_pos);
float star_strength = max(min(star_size / distance * 0.5, 1.25) - 0.25, 0); // star glow
star_strength *= clamp(sin(phi * 2) - 0.1, 0, 1); // fade stars near/under horizon
star_strength *= length(r) / 2; // fade stars
star_strength *= rnum2 > _StarsMissing; // remove stars
float3 star_col = lerp(WHITE, r, _StarTint);
col = lerp(col, star_col, star_strength);
col = sun(col, dir, sun_dir);
/// debug grid
col = lerp(col, WHITE, _Grid * (
pow(frac( cellx), 20) +
pow(frac( celly), 20) +
pow(frac(-cellx), 20) +
pow(frac(-celly), 20)
));
return col;
}
float3 sunset_env(float3 dir, float3 ray_origin) {
ray_origin = 0;
// float3 horizon_col = lerp(_SkyCol, _SunCol, _HorizonTint);
float3 origin = mul(unity_ObjectToWorld, float4(0, 0, 0, 1));
origin = 0;
float3 sun_dir = float3(sin(_SunAngle), 0.0, cos(_SunAngle));
float3 col;
if (dir.y < 0) {
origin.y += _HeightOffset;
float3 camera_local_pos = ray_origin;
camera_local_pos.y = max(camera_local_pos.y, 0.01); // don't allow looking under water surface; it renders backwards.
float3 surface_pos = float3 (
camera_local_pos.x - camera_local_pos.y / (dir.y / dir.x),
0,
camera_local_pos.z - camera_local_pos.y / (dir.y / dir.z)
);
float3 water_normal = get_water_normal(surface_pos.xz);
float3 reflected_dir = reflect(dir, water_normal);
float3 sky_reflection = sky(reflected_dir, sun_dir) ;
float3 water_col = lerp(_SkyCol, _SunCol, 0.01) * _WaterCol;
float3 refracted_dir = normalize(refract(dir, water_normal, 1/1.333));
float subsurf = (refracted_dir.y + 1);
col = water_col * max(subsurf * 12 - 2, 0.7);
float diffuse = max(dot(sun_dir, water_normal), 0);
col += water_col * _SunCol * diffuse * 10;
// float3 water_ao = get_ao(surface_pos.xz);
// col = water_col * lerp(0.1, water_ao, _WaveStrength) * 7;
float hit_angle = dot(dir, -water_normal);
col = lerp(sky_reflection, col, hit_angle);
// col = sky_reflection;
// col *= pow(dot(UP, water_normal), 512); // EVIL in the water
// col = pow((tex2D(_WaterNormal, surface_pos.xz).zxy), 2);
// col = tex2D(_WaterAO, surface_pos.xz);
// float distance = length(surface_pos - camera_local_pos);
// float fog_factor = smoothstep(10, 70, distance) * 0.4;
// col = lerp(col, horizon_col, fog_factor);
}
else {
col = sky(dir, sun_dir);
}
return col;
}
SurfacePoint main(float3 p) {
Material grass = mat(float3(0.05, 0.5, 0.1), 0.3);
Material dirt = mat(float3(0.5, 0.2, 0.05), 0);
Material metal = mat(1, 1);
Material blue = mat(float3(0.5, 0.6, 1), 0);
SurfacePoint d = mPlaneY(p, 0, grass);
d = qIntersect(d, mSphere(p, 9, dirt), 0.5);
d = qUnion(d, mSphere(p - float3(0, 2, 0), 2, metal));
d = qUnion(d, mTorus(rotX(p, _Time * 40 + UNITY_PI / 2), 5, 0.5, blue), 0.5);
d = qUnion(d, mTorus(rotZ(p, _Time * 40 + UNITY_PI / 2), 5, 0.5, blue), 0.5);
d = qUnion(d, mTorus(rotX(p, _Time * 40), 5, 0.5, blue), 0.5);
d = qUnion(d, mTorus(rotZ(p, _Time * 40), 5, 0.5, blue), 0.5);
// small spheres
float3 p2 = abs(rotY(p, -20 * _Time)) - float3(1.5, sin(_Time.y * 5) + 1, 1.5);
d = qUnion(d, mSphere(p2, 0.7, metal), 0.2);
Material water = mat(float3(0.01, 0.015, 0.025), 0.7);
float h = 0;// sin(p.x + sin(p.z * 2+ _Time.y) * 0.3);
h *= 0.1;
h = - 2;
// d = qUnion(d, mPlaneY(p, h - snoise(p / 10 + _Time.xyz * 0.2) * 0.2, water));
float3 p3 = repXZ(p, 20, 20);
// d = qUnion(d, mSphere(p3 - float3(snoise(p), -5, 1), 8, water), 3);
// d = qUnion(d, mSphere(p3 - float3(3, h - 1.5, 2 + sin(p.x / 20)*3), 4, water), 3);
return d;
}
float3 lighting(Ray ray) {
if (ray.missed) {
return sunset_env(ray.dir, ray.start / SCENE_SCALE);
}
float3 sun_dir = normalize(float3(0, 1, 10));
float3 col = 0;
col = ray.mat.col * lSun(ray.normal, sun_dir);
col *= lShadow(ray.hit_pos + ray.normal * SURF_DIST, sun_dir, 50);
col += ray.mat.col * lSky(ray.normal);
return col;
}
ENDCG
}
}
}

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Shader "CrispyPin/Distortion"
{
Properties
{
[Header(Raymarcher Properties)]
_MaxSteps ("Max steps", Int) = 128
_MaxDist ("Max distance", Float) = 128
_SurfDist ("Surface distance threshold", Range(0.0001, 0.05)) = 0.001
}
SubShader
{
Tags { "RenderType"="Opaque" }
Cull Front
LOD 100
Pass
{
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
int _MaxSteps;
float _MaxDist;
float _SurfDist;
#define MAX_STEPS _MaxSteps
#define MAX_DIST _MaxDist
#define SURF_DIST _SurfDist
#define REFLECTIONS 3
#define LIGHT_FN lighting
#define SCENE_FN main
// #define SEPARATE_MATERIAL_AND_DIST_FUNCTIONS
// #define SCENE_FN separate_mat
// #define DISTANCE_FN separate_dist
// #define DISABLE_DEPTH
// #define DISCARD_ON_MISS
// #define USE_WORLD_SPACE
#define STEP_MULTIPLIER 0.5
#define SCENE_SCALE 0.2
#define LIMIT_DEPTH_TO_MESH
#include "lib/libgarbage.cginc"
float3 distort(float3 p) {
p = rotY(p, sin(length(p.xz) * 0.2) * 0.2);
p.x += smoothstep(0, 0.5, fmod(_Time.x, 1)) * 2;
p.z += smoothstep(0.5, 1, fmod(_Time.x, 1)) * 2;
return p;
}
float3 checkers(float3 p, float3 a, float3 b, float2 size) {
float2 q = p.xz / size;
q = int2(abs(q) + 0.5);
int s = ((q.x + q.y) % 2);
return s * a + (1 - s) * b;
}
float3 floor_col(float3 p) {
// oscillating warp
// p = rotY(p, length(p.xz)*0.03*sin(_Time.y) + _Time.y*0.1);
// constant movement with warped grid
// p = rotY(p, sin(length(p.xz) * 0.2) * 0.2);
// p.x += fmod(_Time.y, 4);
//
// p.x += smoothstep(0, 0.5, fmod(_Time.y, 1)) * 2;
// p.z += smoothstep(0.5, 1, fmod(_Time.y, 1)) * 2;
return lerp(0.08,
checkers(p - 1, 0.06, 0.12, 2),
smoothstep(64, 0, length(p))
);
}
SurfacePoint main(float3 p) {
float3 twistp = rotY(p, sin(length(p.xz) * 0.2) * 0.2);
p = distort(p);
Material floor = mat(floor_col(p));
p.y += 2.5;
Material black = mat(0.05);
SurfacePoint d;
// d = mSphere(p - float3(0, -1, 0), 0.1);
d = mPlaneY(p, 0, floor);
d = qIntersect(d, mSphere(p, 20, d.mat));
float3 rp = repXZ(p, 2, 2);
float h = sin(twistp.x - rp.x) + 2 + sin((twistp.z - rp.z)* 0.17);
d = qUnion(d, mBox(rp - float3(0, h*0.5, 0), float3(0.5, h, 0.5), black));
return d;
}
float3 lighting(Ray ray) {
float3 sun_dir = normalize(float3(2, 1, -1));
if (ray.missed) {
if (ray.dir.y >= 0) {
return lRenderSky(ray.dir, sun_dir);
} else
{
float3 cam = ray.start;
cam.y += 2.5;
float3 dir = ray.dir;
float3 surface_pos = float3(
cam.x - cam.y / (dir.y / dir.x),
0,
cam.z - cam.y / (dir.y / dir.z)
);
float col = floor_col(distort(surface_pos));
return col * (lSky(float3(0,1,0)) + lSun(float3(0,1,0), sun_dir));
}
}
float3 col = lSun(ray.normal, sun_dir);
col *= lShadow(ray.hit_pos + ray.normal * SURF_DIST, sun_dir, 50);
col += lSky(ray.normal);
// col = clamp(col, 0, 1);
// col = smoothstep(0,1,col);
// col = pow(col, 1.3);
return ray.mat.col * col ;
// return col*0.2;
}
ENDCG
}
}
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Shader "CrispyPin/Nut"
{
Properties
{
[Header(Raymarcher Properties)]
_MaxSteps ("Max steps", Int) = 128
_MaxDist ("Max distance", Float) = 128
_SurfDist ("Surface distance threshold", Range(0.0001, 0.05)) = 0.001
}
SubShader
{
Tags { "RenderType"="Opaque" }
Cull Front
LOD 100
Pass
{
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
int _MaxSteps;
float _MaxDist;
float _SurfDist;
#define MAX_STEPS _MaxSteps
#define MAX_DIST _MaxDist
#define SURF_DIST _SurfDist
#define REFLECTIONS 2
#define SCENE_FN main
#define LIGHT_FN lighting
// #define SEPARATE_MATERIAL_AND_DIST_FUNCTIONS
// #define SCENE_FN separate_mat
// #define DISTANCE_FN separate_dist
// #define STEP_MULTIPLIER 0.1
#define SCENE_SCALE 0.8
// #define DISABLE_DEPTH
// #define DISCARD_ON_MISS
#define LIMIT_DEPTH_TO_MESH
// #define USE_WORLD_SPACE
#include "lib/libgarbage.cginc"
float3 checkers(float3 p, float3 a, float3 b, float2 size) {
float2 q = p.xz / size;
q = int2(abs(q) + 0.5);
int s = ((q.x + q.y) % 2);
return s * a + (1 - s) * b;
}
float3 floor(float3 p) {
return lerp(0.15,
checkers(p - 1, 0.10, 0.18, .2),
smoothstep(16, 0, length(p))
);
}
SurfacePoint mRoundedHex(float3 p, float girth, float height) {
SurfacePoint d;
d = qRound(mHexPrism(p, girth, height), 0.01);
float rounding = 3;
d = qIntersect(d, mSphere(p - float3(0, -rounding + height, 0), rounding), 0.01);
d = qIntersect(d, mSphere(p + float3(0, -rounding + height, 0), rounding), 0.01);
return d;
}
SurfacePoint main(float3 p) {
float girth = 0.3;
float height = 0.1;
float inner_radius = 0.18;
float thread = 0.013;
// float thread = 0.01 + sin(_Time.x * 8) * 0.01 + 0.01;
SurfacePoint d;
float3 rp = rotY(p, _Time.y);
rp = rotX(rp, _Time.x);
// nut
d = mRoundedHex(rp, girth, height);
d = qSub(d, mInfCylinder(rp, float3(0, 0, inner_radius)), 0.02);
d = qSub(d, mHelix(rp - float3(0, -1, 0), inner_radius, thread, thread/2), 0.003);
// bolt
SurfacePoint bolt_thread = mInfCylinder(rp, float3(0, 0, inner_radius + 0.3));
bolt_thread = qSub(bolt_thread, mInfCylinder(rp, float3(0, 0, inner_radius)), 0.02);
bolt_thread = qSub(bolt_thread, mHelix(rp - float3(0, -1, 0), inner_radius, thread, thread/2), 0.03);
// d = qUnion(d, bolt_thread);
float h = sin(_Time.y) * 0.15 + 0.2;
float3 bp = rotY(rp, sin(_Time.y) * UNITY_PI * 4);
bp.y -= h;
SurfacePoint bolt = qSub(mCylinder(bp, inner_radius+thread*2, 0.2), bolt_thread);
bolt = qUnion(bolt, mRoundedHex(bp - float3(0, 0.13, 0), girth, height));
bolt = qUnion(bolt, mCylinder(bp - float3(0, -0.17, 0), inner_radius , 0.1), 0.05);
Material metal1 = mat(float3(0.5, 0.3, 0.1), 1);
Material metal2 = mat(float3(0.3, 0.3, 0.5), 1);
d.mat = metal1;
bolt.mat = metal2;
// cube
// float3 cp = rotX(bp - float3(0, -0.32, 0), _Time.w * 5);
// bolt = qUnion(bolt, mBox(cp, 0.1, mat(float3(0,1,1))),.1);
d = qUnion(d, bolt);
// floor
// d = qUnion(d, mPlaneY(p, -0.5, mat(floor_col, 0)), 0.01);
// d = qIntersect(d, mPlaneY(-p, 0.6, mat(floor_col, 0)), 0.01);
d = qUnion(d, mBox(p - float3(0, -0.6, 0), float3(6, 0.05, 6), mat(floor(p), 0)));
// d = qUnion(d, mSphere(p - float3(0, -0.5, 1), 0.4));
return d;
}
float3 lighting(Ray ray) {
float3 sun_dir = normalize(float3(4, 2, 1));
if (ray.missed) {
if (ray.dir.y >= 0) {
return lRenderSky(ray.dir, sun_dir);
}
else {
float3 cam = ray.start;
cam.y += 0.6 - 0.0275;
float3 dir = ray.dir;
float3 surface_pos = float3 (
cam.x - cam.y / (dir.y / dir.x),
0,
cam.z - cam.y / (dir.y / dir.z)
);
float col = 1;
col = floor(surface_pos);
return col * (lSky(float3(0,1,0)) + lSun(float3(0,1,0), sun_dir));
}
}
float3 col = 0;
col =
// ray.mat.col *
lSun(ray.normal, sun_dir);
col *= lShadow(ray.hit_pos + ray.normal * SURF_DIST, sun_dir, 50);
col +=
// ray.mat.col *
lSky(ray.normal);
// float3(0.5, 0.8, 0.9);
// col = ray.mat.col;
return col*ray.mat.col;
}
ENDCG
}
}
}

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Shader "CrispyPin/LibGarbageSpinny"
{
Properties
{
[Header(Raymarcher Properties)]
_MaxSteps ("Max steps", Int) = 128
_MaxDist ("Max distance", Float) = 128
_SurfDist ("Surface distance threshold", Range(0.0001, 0.05)) = 0.001
}
SubShader
{
Tags { "RenderType"="Opaque" }
Cull Front
LOD 100
Pass
{
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
int _MaxSteps;
float _MaxDist;
float _SurfDist;
#define MAX_STEPS _MaxSteps
#define MAX_DIST _MaxDist
#define SURF_DIST _SurfDist
#define REFLECTIONS 3
#define LIGHT_FN lighting
#define SCENE_FN main
// #define SEPARATE_MATERIAL_AND_DIST_FUNCTIONS
// #define SCENE_FN separate_mat
// #define DISTANCE_FN separate_dist
// #define DISABLE_DEPTH
#define DISCARD_ON_MISS
// #define USE_WORLD_SPACE
#define SCENE_SCALE 0.05
#include "lib/libgarbage.cginc"
SurfacePoint main(float3 p) {
Material grass = mat(float3(0.05, 0.5, 0.1), 0.3);
Material dirt = mat(float3(0.5, 0.2, 0.05), 0);
Material metal = mat(1, 1);
Material blue = mat(float3(0.5, 0.6, 1), 0);
SurfacePoint d = mPlaneY(p, 0, grass);
d = qIntersect(d, mSphere(p, 9, dirt), 0.5);
d = qUnion(d, mSphere(p - float3(0, 2, 0), 2, metal));
d = qUnion(d, mTorus(rotX(p, _Time * 40 + UNITY_PI / 2), 5, 0.5, blue), 0.5);
d = qUnion(d, mTorus(rotZ(p, _Time * 40 + UNITY_PI / 2), 5, 0.5, blue), 0.5);
d = qUnion(d, mTorus(rotX(p, _Time * 40), 5, 0.5, blue), 0.5);
d = qUnion(d, mTorus(rotZ(p, _Time * 40), 5, 0.5, blue), 0.5);
// small spheres
float3 p2 = abs(rotY(p, -20 * _Time)) - float3(1.5, sin(_Time.y * 5) + 1, 1.5);
d = qUnion(d, mSphere(p2, 0.7, metal), 0.2);
return d;
}
// SurfacePoint separate_mat(float3 p) {
// Material blue = mat(float3(0.05, 0.1, 0.2), 0);
// SurfacePoint d = mSphere(p, 1, blue);
// return d;
// }
// float separate_dist(float3 p) {
// return main(p).dist;
// }
float3 lighting(Ray ray) {
if (ray.missed)
return lRenderSky(ray.dir, normalize(float3(4,2,1)));
float3 sun_dir = normalize(float3(4, 2, 1));
float3 col = 0;
col = //ray.mat.col *
lSun(ray.normal, sun_dir);
col *= lShadow(ray.hit_pos + ray.normal * SURF_DIST, sun_dir, 50);
col +=
// ray.mat.col *
lSky(ray.normal);
return col * ray.mat.col;
}
ENDCG
}
}
}

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