libgarbage: implement scene scaling & fix depth
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4 changed files with 58 additions and 16 deletions
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@ -598,8 +598,8 @@ Transform:
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m_PrefabAsset: {fileID: 0}
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m_GameObject: {fileID: 683266143}
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m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
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m_LocalPosition: {x: 0, y: 0, z: 0}
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m_LocalScale: {x: 3, y: 3, z: 3}
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m_LocalPosition: {x: 0, y: 0.26, z: -0.407}
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m_LocalScale: {x: 1, y: 1, z: 1}
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m_Children: []
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m_Father: {fileID: 0}
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m_RootOrder: 7
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@ -1516,7 +1516,7 @@ GameObject:
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m_Icon: {fileID: 0}
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m_NavMeshLayer: 0
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m_StaticEditorFlags: 0
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m_IsActive: 0
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m_IsActive: 1
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--- !u!65 &1485771012
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BoxCollider:
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m_ObjectHideFlags: 0
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@ -42,12 +42,10 @@ START_RAYS_IN_SPHERE // TODO: implement
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#define SURF_DIST 0.001
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#endif
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// TODO: implement
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#ifndef REFLECTIONS
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#define REFLECTIONS 0
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#endif
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// TODO: implement
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#ifndef SCENE_SCALE
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#define SCENE_SCALE 1
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#endif
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@ -130,7 +128,8 @@ FragOut frag (V2F i) {
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float ray_len = 0;
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float3 ray_dir = normalize(i.hit_pos - i.cam_pos);
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float3 last_bounce = i.cam_pos;
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float3 ray_origin = i.cam_pos;
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ray_origin /= SCENE_SCALE;
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SurfacePoint point_data;
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Ray ray;
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@ -140,7 +139,7 @@ FragOut frag (V2F i) {
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float3 first_hit;
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for (int ray_num = 0; ray_num < REFLECTIONS + 1; ray_num++) {
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ray = cast_ray(last_bounce, ray_dir);
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ray = cast_ray(ray_origin, ray_dir);
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if (ray_num == 0) { // before any bounces
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col = LIGHT_FN(ray);
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first_hit = ray.hit_pos;
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@ -154,7 +153,7 @@ FragOut frag (V2F i) {
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}
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prev_gloss = ray.mat.gloss;
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ray_dir = reflect(ray_dir, ray.normal);
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last_bounce = ray.hit_pos + ray_dir * 0.01;
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ray_origin = ray.hit_pos + ray_dir * 0.01;
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}
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#ifdef DISCARD_ON_MISS
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@ -165,10 +164,14 @@ FragOut frag (V2F i) {
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o.col = col;
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#ifndef DISABLE_DEPTH
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float3 depth_point = first_hit;
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if (ray.missed)
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float3 depth_point = first_hit * SCENE_SCALE;
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if (ray.missed && ray_num == 0)
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depth_point = i.hit_pos;
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#ifdef USE_WORLD_SPACE
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float4 clip_pos = mul(UNITY_MATRIX_VP, float4(depth_point, 1));
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#else
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float4 clip_pos = mul(UNITY_MATRIX_VP, mul(unity_ObjectToWorld, float4(depth_point, 1)));
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#endif
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o.depth = clip_pos.z / clip_pos.w;
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#ifndef UNITY_REVERSED_Z // basically only OpenGL (unity editor on linux)
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o.depth = o.depth * 0.5 + 0.5; // remap -1 to 1 range to 0.0 to 1.0
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@ -211,6 +214,7 @@ Ray cast_ray(float3 start, float3 dir, float start_len) {
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ray.steps = i;
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if (ray.missed) {
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ray.normal = float3(0, 0, 0);
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ray.mat = mat();
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} else {
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ray.normal = get_normal(ray.hit_pos, ray.dist);
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ray.mat = MATERIAL_FN(ray.hit_pos).mat;
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@ -22,18 +22,34 @@ Shader "CrispyPin/LibGarbageExample"
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int _MaxSteps;
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#define MAX_STEPS _MaxSteps
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float _MaxDist;
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#define MAX_DIST _MaxDist
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float _SurfDist;
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#define SURF_DIST _SurfDist
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#define REFLECTIONS 1
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#define DISTANCE_FN main_dist
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#define MATERIAL_FN main_mat
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#define DISABLE_DEPTH
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#define DISCARD_ON_MISS
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#define USE_WORLD_SPACE
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#define LIGHT_FN lighting
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// #define DISABLE_DEPTH
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// #define DISCARD_ON_MISS
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// #define USE_WORLD_SPACE
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#define SCENE_SCALE 0.05
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#include "libgarbage.cginc"
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float main_dist(float3 p) {
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p = repXYZ(p, 2);
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return qSub(sdSphere(p, 0.5), sdSphere(p - 0.3, 0.2), 0.05);
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float d = sdPlaneY(p, 0);
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d = qIntersect(d, sdSphere(p, 9), 0.5);
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d = qUnion(d, sdSphere(p - float3(0, 2, 0), 2));
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d = qUnion(d, sdTorus(rotX(p, _Time * 40 + UNITY_PI / 2), 5, 0.5), 0.5);
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d = qUnion(d, sdTorus(rotZ(p, _Time * 40 + UNITY_PI / 2), 5, 0.5), 0.5);
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d = qUnion(d, sdTorus(rotX(p, _Time * 40), 5, 0.5), 0.5);
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d = qUnion(d, sdTorus(rotZ(p, _Time * 40), 5, 0.5), 0.5);
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// small spheres
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float3 p2 = abs(rotY(p, -20 * _Time)) - float3(1.5, sin(_Time.y * 5) + 1, 1.5);
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d = qUnion(d, sdSphere(p2, 0.7), 0.2);
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return d;
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}
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SurfacePoint main_mat(float3 p) {
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@ -41,6 +57,15 @@ Shader "CrispyPin/LibGarbageExample"
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return mSphere(p2, 0.5, mat(clamp(abs(p), 0, 1), 0.1));
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}
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float3 lighting(Ray ray) {
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float3 sun_dir = normalize(float3(1, 0.5, 0));
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if (ray.missed)
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return float3(0.15, 0.25, 0.3);
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float3 col = 0;
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col = ray.mat.col * clamp(dot(ray.normal, sun_dir),0.01,1);
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return col;
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}
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ENDCG
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}
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}
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@ -38,3 +38,16 @@ float sdSphere(float3 p, float radius) {
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}
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_MAT_VARIANT1(mSphere, sdSphere, float, radius)
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float sdTorus(float3 p, float radius, float thickness) {
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float2 q = float2(length(p.xz) - radius, p.y);
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return length(q) - thickness;
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}
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_MAT_VARIANT2(mTorus, sdTorus, float, radius, float, thickness)
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float sdPlaneY(float3 p, float height) {
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return p.y - height;
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}
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_MAT_VARIANT1(mPlaneY, sdPlaneY, float, height)
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