98 lines
2.5 KiB
GLSL
98 lines
2.5 KiB
GLSL
Shader "CrispyPin/Bocs"
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{
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Properties
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{
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[Header(Raymarcher Properties)]
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_MaxSteps ("Max steps", Integer) = 128
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_MaxDist ("Max distance", Float) = 128
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_SurfDist ("Surface distance threshold", Range(.0001, .05)) = .001
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}
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SubShader
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{
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Tags { "RenderType"="Opaque" }
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Cull Front
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LOD 100
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Pass
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{
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CGPROGRAM
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#pragma vertex vert
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#pragma fragment frag
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int _MaxSteps;
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float _MaxDist;
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float _SurfDist;
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#define MAX_STEPS _MaxSteps
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#define MAX_DIST _MaxDist
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#define SURF_DIST _SurfDist
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#define SCENE_FN main
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//#define LIGHT_FN lighting
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// #define SCENE_SCALE 1
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#define DISCARD_ON_MISS
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#include "lib/libgarbage.cginc"
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#define SPEED 1.5
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#define BOX_SIZE .15
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#define RADIUS BOX_SIZE*2
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float3 checkers(float3 p, float3 a, float3 b, float2 size) {
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float2 q = p.xz / size;
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q = int2(abs(q) + .5);
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int s = ((q.x + q.y) % 2);
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return s * a + (1 - s) * b;
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}
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Material gridtexture(float3 p) {
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return mat(checkers(p + BOX_SIZE/2 , 0.35, 0.45, BOX_SIZE));
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}
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SurfacePoint Boc(float3 p, float t, float3 grid_transform = float3(1,1,1)) {
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float x = smoothstep(0, .5, fmod(t, 4) - .5) * RADIUS;
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float z = smoothstep(1, .5, fmod(t, 4) - 2) * RADIUS;
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float y = smoothstep(.25, .75, abs(fmod(t - .75, 2) - 1)) * BOX_SIZE * 2 - BOX_SIZE / 2;
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return mBox(p - float3(x,y,z), BOX_SIZE,
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// mat(.05, .8, .8)
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gridtexture((p - float3(x,y,z)) * grid_transform)
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);
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}
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SurfacePoint main(float3 p) {
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SurfacePoint d;
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// base
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const float base_width = BOX_SIZE * 6 - 0.01;
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d = mBox(p - float3(0,-.15,0), float3(base_width, .3, base_width), gridtexture(p));
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float t = _Time.y * SPEED;
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// holes
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float3 ph = float3(abs(p.x), p.y, abs(p.z));
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d = qSub(d, mBox(ph - float3(RADIUS, 0, RADIUS), float3(BOX_SIZE, RADIUS, BOX_SIZE)));
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d = qSub(d, mBox(ph - float3(0, 0, RADIUS), float3(BOX_SIZE, RADIUS, BOX_SIZE)));
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d = qSub(d, mBox(ph - float3(RADIUS, 0, 0), float3(BOX_SIZE, RADIUS, BOX_SIZE)));
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// boxes
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d = qUnion(d, Boc(p, t));
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d = qUnion(d, Boc(p, t + 2));
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float3 p2 = p * float3(-1,1,-1);
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d = qUnion(d, Boc(p2, t));
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d = qUnion(d, Boc(p2, t + 2));
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const float3 flip_x = float3(-1,1,1);
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const float3 flip_z = float3(1,1,-1);
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float3 p3 = p.zyx * flip_x;
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d = qUnion(d, Boc(p3, t, flip_x));
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d = qUnion(d, Boc(p3, t + 2, flip_x));
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float3 p4 = p.zyx * flip_z;
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d = qUnion(d, Boc(p4, t, flip_x));
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d = qUnion(d, Boc(p4, t + 2, flip_x));
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return d;
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}
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ENDCG
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}
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}
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}
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