本文实例为大家分享了shader实现基于世界坐标的贴图置换效果。
效果如下：
设置面板如下：
可在面板上设置切换方向，与切换对象，及其切换速度。
shader实现如下：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
Shader "XM/Effect/SwapTexture" { Properties { _Color ("Color", Color) = (1,1,1,1) _MainTex ("Albedo (RGB)", 2D) = "white" {} _TargetTex ("Target Tex", 2D) = "white" {}//目标贴图 [KeywordEnum(Up, Down, Left, Right, Forward, Back)] _mode ("Mode", Int) = 0//切换方向 _SwapBlend ("Blend", Range(0,1)) = 0//0-1混合值 _SwapMin("Min Value", Float) = 0//最小世界坐标 _SwapMax("Max Value", Float) = 0//最大世界坐标 _Glossiness ("Smoothness", Range(0,1)) = 0.5 _Metallic ("Metallic", Range(0,1)) = 0.0 } SubShader { Tags { "RenderType"="Opaque" } LOD 200 CGPROGRAM // Physically based Standard lighting model, and enable shadows on all light types #pragma surface surf Standard fullforwardshadows vertex:vert // Use shader model 3.0 target, to get nicer looking lighting #pragma target 3.0 sampler2D _MainTex; sampler2D _TargetTex; struct Input { float2 uv_MainTex; float3 worldPos; }; half _mode; half _SwapBlend; float _SwapMin; float _SwapMax; half _Glossiness; half _Metallic; fixed4 _Color; void vert (inout appdata_full v, out Input o) { UNITY_INITIALIZE_OUTPUT(Input,o); } void surf (Input IN, inout SurfaceOutputStandard o) { half useTarget = 0; float targetValue = 0; switch(_mode)//模式选择 { case 0://up targetValue = (_SwapMax - _SwapMin) * _SwapBlend + _SwapMin; useTarget = IN.worldPos.y > targetValue?0:1; break; case 1://down targetValue = (_SwapMax - _SwapMin) * (1 - _SwapBlend) + _SwapMin; useTarget = IN.worldPos.y < targetValue?0:1; break; case 2://left targetValue = (_SwapMax - _SwapMin) * (1 - _SwapBlend) + _SwapMin; useTarget = IN.worldPos.x < targetValue?0:1; break; case 3://right targetValue = (_SwapMax - _SwapMin) * _SwapBlend + _SwapMin; useTarget = IN.worldPos.x > targetValue?0:1; break; case 4://forward targetValue = (_SwapMax - _SwapMin) * _SwapBlend + _SwapMin; useTarget = IN.worldPos.z > targetValue?0:1; break; case 5://back targetValue = (_SwapMax - _SwapMin) * (1 - _SwapBlend) + _SwapMin; useTarget = IN.worldPos.z < targetValue?0:1; break; } // Albedo comes from a texture tinted by color fixed4 c; if(useTarget == 1) { c = tex2D (_TargetTex, IN.uv_MainTex); } else { c = tex2D (_MainTex, IN.uv_MainTex); } c *= _Color; o.Albedo = c.rgb; // Metallic and smoothness come from slider variables o.Metallic = _Metallic; o.Smoothness = _Glossiness; o.Alpha = c.a; } ENDCG } FallBack "Diffuse"} |
配合使用的脚本如下：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
using System;using System.Collections;using UnityEngine;namespace XM.Effect{ public class SwapTexture : MonoBehaviour { public enum SwapDirection { Up, Down, Left, Right, Forward, Back } public Shader _shader;//"XM/Effect/SwapTexture” shader public SwapDirection _swapDir;//切换方向 public Renderer _target;//目标对象 [Range(0, 1)] public float _speed;//速度 private Material _matOld; private Material _matNew; public void Swap(Texture tex, Action<bool> onComplete) { if (_matOld != null) { StopAllCoroutines(); if (null != onComplete) { onComplete(false); } _target.material = _matOld; } _matOld = _target.material; _matNew = new Material(_shader); _matNew.SetTexture("_MainTex", _target.material.GetTexture("_MainTex")); _matNew.SetTexture("_TargetTex", tex); _matNew.SetInt("_mode", (int)_swapDir); _matNew.SetFloat("_SwapBlend", 0); StartCoroutine("_StartChange", onComplete); } private IEnumerator _StartChange(Action<bool> onComplete) { float deltaVal = 0; _target.material = _matNew; Vector3 vtMin; Vector3 vtMax; float minVal = 0; float maxVal = 0; while (deltaVal != 1) { vtMin = _target.bounds.min; vtMax = _target.bounds.max; switch (_swapDir) { case SwapDirection.Up: case SwapDirection.Down: minVal = vtMin.y; maxVal = vtMax.y; break; case SwapDirection.Left: case SwapDirection.Right: minVal = vtMin.x; maxVal = vtMax.x; break; case SwapDirection.Forward: case SwapDirection.Back: minVal = vtMin.z; maxVal = vtMax.z; break; } minVal -= 0.01f; maxVal += 0.01f; _matNew.SetFloat("_SwapMin", minVal); _matNew.SetFloat("_SwapMax", maxVal); deltaVal = Mathf.Clamp01(deltaVal + _speed * Time.deltaTime); _matNew.SetFloat("_SwapBlend", deltaVal); yield return null; } _matOld.SetTexture("_MainTex", _matNew.GetTexture("_TargetTex")); _target.material = _matOld; _matNew = null; _matOld = null; if (null != onComplete) { onComplete(true); } } public void OnDrawGizmos() { if (_target != null) { Gizmos.DrawWireCube(_target.bounds.center, _target.bounds.size); Gizmos.DrawWireSphere(_target.bounds.min, 0.1f); Gizmos.DrawWireSphere(_target.bounds.max, 0.1f); } } //test public Texture testTex; private void OnGUI() { if (GUILayout.Button("SwapTexture")) { Swap(testTex, (t) => { Debug.Log("Swap>" + t); }); } } // }} |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/u012741077/article/details/53948802
