yum/3ner

A toon shader for Unity's BIRP.

git clone https://git.yummers.dev/yum/3ner

yumImpostors: begin optimization work50e4514

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1#ifndef __CNLOHR_INC
2#define __CNLOHR_INC
3
4#include "globals.cginc"
5#include "interpolators.cginc"
6
7/*
8 * MIT License
9 *
10 * NOTE: Much content here is originally from others.  Content in third party
11 * folder may not be fully MIT-licensable. 
12 *
13 * Copyright (c) 2021 cnlohr, et. al.
14 *
15 * All other content in this repository falls under the following terms:
16 *
17 * Permission is hereby granted, free of charge, to any person obtaining a copy
18 * of this software and associated documentation files (the "Software"), to
19 * deal
20 * in the Software without restriction, including without limitation the rights
21 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
22 * copies of the Software, and to permit persons to whom the Software is
23 * furnished to do so, subject to the following conditions:
24 *
25 * The above copyright notice and this permission notice shall be included in
26 * all
27 * copies or substantial portions of the Software.
28 *
29 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
30 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
31 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
32 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
33 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
34 * FROM,
35 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
36 * THE
37 * SOFTWARE.
38 */
39
40UNITY_DECLARE_DEPTH_TEXTURE(_CameraDepthTexture);
41float _VRChatMirrorMode;
42float3 _VRChatMirrorCameraPos;
43
44
45// Source:
46// https://github.com/cnlohr/shadertrixx?tab=readme-ov-file#eye-center-position
47bool isMirror() { return _VRChatMirrorMode != 0; }
48
49// Source:
50// https://github.com/cnlohr/shadertrixx?tab=readme-ov-file#eye-center-position
51float3 getCenterCamPos() {
52#if defined(USING_STEREO_MATRICES) || defined(UNITY_SINGLE_PASS_STEREO)
53  return (unity_StereoWorldSpaceCameraPos[0] + unity_StereoWorldSpaceCameraPos[1]) * 0.5;
54#else
55  return isMirror() ? _VRChatMirrorCameraPos : _WorldSpaceCameraPos.xyz;
56#endif
57}
58
59bool isVR() {
60#if defined(USING_STEREO_MATRICES)
61  return true;
62#else
63  return false;
64#endif
65}
66
67float GetLinearZFromZDepth_WorksWithMirrors(float zDepthFromMap, float2 screenUV)
68{
69	#if defined(UNITY_REVERSED_Z)
70		zDepthFromMap = 1 - zDepthFromMap;
71
72		// When using a mirror, the far plane is whack.  This just checks for it and aborts.
73		if( zDepthFromMap >= 1.0 ) return _ProjectionParams.z;
74	#endif
75
76	float4 clipPos = float4(screenUV.xy, zDepthFromMap, 1.0);
77	clipPos.xyz = 2.0f * clipPos.xyz - 1.0f;
78	float4 camPos = mul(unity_CameraInvProjection, clipPos);
79	return -camPos.z / camPos.w;
80}
81
82void GetScreenUVAndPerspectiveFactor(float3 worldPos, float4 clipPos, out float2 screen_uv, out float perspective_factor) {
83    float3 full_vec_eye_to_geometry = worldPos - _WorldSpaceCameraPos;
84    float perspective_divide = 1.0f / clipPos.w;
85    perspective_factor = length(full_vec_eye_to_geometry * perspective_divide);
86    screen_uv = ComputeScreenPos(clipPos).xy;
87}
88
89#if defined(_SSAO)
90float GetDepthOfWorldPos(float3 worldPos)
91{
92  float3 objPos = mul(unity_WorldToObject, float4(worldPos, 1));
93  float4 clipPos = UnityObjectToClipPos(objPos);
94  float4 screenPos = ComputeScreenPos(clipPos);
95  const float2 screen_uv = screenPos.xy / screenPos.w;
96
97  float zDepthFromMap = SAMPLE_DEPTH_TEXTURE(_CameraDepthTexture, screen_uv);
98  float linearZ =
99    GetLinearZFromZDepth_WorksWithMirrors(zDepthFromMap, screen_uv);
100  linearZ = min(1E3, linearZ);
101
102  return linearZ;
103}
104#endif
105
106#endif  // __CNLOHR_INC