diff options
Diffstat (limited to 'fog.cginc')
| -rw-r--r-- | fog.cginc | 45 |
1 files changed, 38 insertions, 7 deletions
@@ -82,9 +82,13 @@ float map(float3 p, out float3 normal) { #define RADIUS_TRANS_WIDTH_RCP (1.0 / RADIUS_TRANS_WIDTH) // Try to create a smooth transition without doing any length() or other // transcendental ops. - float radius2 = (_Gimmick_Fog_00_Boundary_Type == 0) ? - clamp(_Gimmick_Fog_00_Radius * _Gimmick_Fog_00_Radius - dot(p.xz, p.xz), 0, RADIUS_TRANS_WIDTH) * RADIUS_TRANS_WIDTH_RCP : - 0; +#if 1 && defined(_GIMMICK_FOG_00_BOUNDARY_CYLINDER) + float radius2 = clamp(_Gimmick_Fog_00_Radius * _Gimmick_Fog_00_Radius - dot(p.xz, p.xz), 0, RADIUS_TRANS_WIDTH) * RADIUS_TRANS_WIDTH_RCP; +#elif 1 && defined(_GIMMICK_FOG_00_BOUNDARY_SPHERE) + float radius2 = clamp(_Gimmick_Fog_00_Radius * _Gimmick_Fog_00_Radius - dot(p, p), 0, RADIUS_TRANS_WIDTH) * RADIUS_TRANS_WIDTH_RCP; +#else + float radius2 = 1; +#endif float3 pp = p * _Gimmick_Fog_00_Noise_Scale * FOG_PERLIN_NOISE_SCALE; normal = normalize(perlin_noise_3d_tex(pp+t) * 2 - 1); @@ -262,7 +266,8 @@ Fog00PBR __getFog00(v2f i, ToonerData tdata, const float3 rd = normalize(obj_pos - cam_pos); float3 ro = cam_pos; - if (_Gimmick_Fog_00_Boundary_Type == 0) { +#if defined(_GIMMICK_FOG_00_BOUNDARY_CYLINDER) + { // Raytrace distance to cylinder bool no_intersection = false; float distance_to_cylinder = 1E6; @@ -281,7 +286,9 @@ Fog00PBR __getFog00(v2f i, ToonerData tdata, } } clip(no_intersection ? -1 : 1); - } else if (_Gimmick_Fog_00_Boundary_Type == 1) { + } +#elif defined(_GIMMICK_FOG_00_BOUNDARY_PLANE) + { // Raytrace distance to plane bool no_intersection = false; float distance_to_plane = 1E6; @@ -306,6 +313,28 @@ Fog00PBR __getFog00(v2f i, ToonerData tdata, } clip(no_intersection ? -1 : 1); } +#elif defined(_GIMMICK_FOG_00_BOUNDARY_SPHERE) + { + bool no_intersection = false; + float distance_to_sphere = 1E6; + { + float3 l = ro; + float a = 1; + float b = 2 * dot(rd, l); + float c = dot(l, l) - _Gimmick_Fog_00_Radius * _Gimmick_Fog_00_Radius; + float t0, t1; + if (solveQuadratic(a, b, c, t0, t1)) { + no_intersection = (t0 < 0) * (t1 < 0); + const bool inside_sphere = (t0 < 0) * (t1 > 0); + if (!inside_sphere) { + distance_to_sphere = no_intersection ? distance_to_sphere : min(max(t0, 0), max(t1, 0)); + ro += distance_to_sphere * rd; + } + } + } + clip(no_intersection ? -1 : 1); + } +#endif float density_ss_term = 1 / _Gimmick_Fog_00_Density; //density_ss_term = dclamp(density_ss_term, 0.33, 3.00, 5); @@ -324,7 +353,7 @@ Fog00PBR __getFog00(v2f i, ToonerData tdata, const float dither_seed = rand2(float2(screen_uv_round.x, screen_uv_round.y)*.001); #endif float dither = dither_seed * step_size * _Gimmick_Fog_00_Ray_Origin_Randomization; - ro += rd * (0.001 + dither); + ro += rd * (_Gimmick_Fog_00_Initial_Offset + dither); const float depth_hit_l = length(obj_pos_depth_hit - ro); @@ -425,10 +454,12 @@ Fog00PBR __getFog00(v2f i, ToonerData tdata, if (acc.a > _Gimmick_Fog_00_Alpha_Cutoff) { break; } - if (_Gimmick_Fog_00_Boundary_Type == 0 && dot(p.xz, p.xz) > _Gimmick_Fog_00_Radius * _Gimmick_Fog_00_Radius) { +#if defined(_GIMMICK_FOG_00_BOUNDARY_SPHERE) || defined(_GIMMICK_FOG_00_BOUNDARY_CYLINDER) + if (dot(p.xz, p.xz) > _Gimmick_Fog_00_Radius * _Gimmick_Fog_00_Radius) { break; } #endif +#endif } if (acc.a > _Gimmick_Fog_00_Alpha_Cutoff || ii == FOG_MAX_LOOP) { acc /= acc.a; |