回答編集履歴
1
回転機能を追加
answer
CHANGED
|
@@ -12,6 +12,8 @@
|
|
|
12
12
|
_Seed ("Seed", Float) = 0.0
|
|
13
13
|
_NebulaColor1 ("Nebula Color 1", Color) = (0, 0, 0.25, 1)
|
|
14
14
|
_NebulaColor2 ("Nebula Color 2", Color) = (0.25, 0, 0.25, 1)
|
|
15
|
+
_Rotation ("Rotation Angle", Range(0.0, 360.0)) = 0.0
|
|
16
|
+
_RotationAxis ("Rotation Axis", Vector) = (1.0, 0.0, 0.0, 0.0)
|
|
15
17
|
}
|
|
16
18
|
SubShader
|
|
17
19
|
{
|
|
@@ -30,6 +32,7 @@
|
|
|
30
32
|
CGPROGRAM
|
|
31
33
|
#pragma vertex vert
|
|
32
34
|
#pragma fragment frag
|
|
35
|
+
#include "UnityCG.cginc"
|
|
33
36
|
|
|
34
37
|
struct appdata
|
|
35
38
|
{
|
|
@@ -43,10 +46,25 @@
|
|
|
43
46
|
float3 texcoord : TEXCOORD0;
|
|
44
47
|
};
|
|
45
48
|
|
|
49
|
+
float _Rotation;
|
|
50
|
+
float3 _RotationAxis;
|
|
51
|
+
|
|
46
52
|
v2f vert(appdata v)
|
|
47
53
|
{
|
|
48
54
|
v2f o;
|
|
55
|
+
float cosTheta;
|
|
56
|
+
float sinTheta;
|
|
57
|
+
sincos(_Rotation * UNITY_PI / 180.0, sinTheta, cosTheta);
|
|
58
|
+
float cosThetaI = 1.0 - cosTheta;
|
|
59
|
+
float3 u = normalize(_RotationAxis);
|
|
60
|
+
float3 u2 = u * u;
|
|
61
|
+
float3 us = u * u.yzx;
|
|
62
|
+
float3x3 r = float3x3(
|
|
63
|
+
cosTheta + u2.x * cosThetaI, -u.z * sinTheta + us.x * cosThetaI, u.y * sinTheta + us.z * cosThetaI,
|
|
64
|
+
u.z * sinTheta + us.x * cosThetaI, cosTheta + u2.y * cosThetaI, -u.x * sinTheta + us.y * cosThetaI,
|
|
65
|
+
-u.y * sinTheta + us.z * cosThetaI, u.x * sinTheta + us.y * cosThetaI, cosTheta + u2.z * cosThetaI
|
|
66
|
+
);
|
|
49
|
-
o.vertex = UnityObjectToClipPos(v.vertex);
|
|
67
|
+
o.vertex = UnityObjectToClipPos(float4(mul(r, v.vertex.xyz), v.vertex.w));
|
|
50
68
|
o.texcoord = v.texcoord;
|
|
51
69
|
return o;
|
|
52
70
|
}
|
|
@@ -144,6 +162,7 @@
|
|
|
144
162
|
m1 = m1 * m1;
|
|
145
163
|
return 49.0 * (dot(m0 * m0, float3(dot(p0, x0), dot(p1, x1), dot(p2, x2)))
|
|
146
164
|
+ dot(m1 * m1, float2(dot(p3, x3), dot(p4, x4))));
|
|
165
|
+
|
|
147
166
|
}
|
|
148
167
|
|
|
149
168
|
float _Seed;
|
|
@@ -173,4 +192,54 @@
|
|
|
173
192
|
}
|
|
174
193
|
}
|
|
175
194
|
```
|
|
176
|
-
|
|
195
|
+
|
|
196
|
+
|
|
197
|
+
**回転させる例**
|
|
198
|
+
```C#
|
|
199
|
+
using UnityEngine;
|
|
200
|
+
|
|
201
|
+
public class ProceduralStarfieldRotor : MonoBehaviour
|
|
202
|
+
{
|
|
203
|
+
private static readonly int RotationProperty = Shader.PropertyToID("_Rotation");
|
|
204
|
+
private static readonly int RotationAxisProperty = Shader.PropertyToID("_RotationAxis");
|
|
205
|
+
|
|
206
|
+
[SerializeField] private float angularSpeed = 15.0f;
|
|
207
|
+
[SerializeField] private Vector3 axis = Vector3.right;
|
|
208
|
+
|
|
209
|
+
private Material skybox;
|
|
210
|
+
private float angle;
|
|
211
|
+
|
|
212
|
+
private void Start()
|
|
213
|
+
{
|
|
214
|
+
this.skybox = RenderSettings.skybox;
|
|
215
|
+
if (this.skybox == null)
|
|
216
|
+
{
|
|
217
|
+
Debug.LogError("No Skybox.");
|
|
218
|
+
this.enabled = false;
|
|
219
|
+
return;
|
|
220
|
+
}
|
|
221
|
+
|
|
222
|
+
if (!this.skybox.HasProperty(RotationProperty))
|
|
223
|
+
{
|
|
224
|
+
Debug.LogError("Skybox does not have _Rotation.");
|
|
225
|
+
this.enabled = false;
|
|
226
|
+
return;
|
|
227
|
+
}
|
|
228
|
+
|
|
229
|
+
if (!this.skybox.HasProperty(RotationAxisProperty))
|
|
230
|
+
{
|
|
231
|
+
Debug.LogError("Skybox does not have _RotationAxis.");
|
|
232
|
+
this.enabled = false;
|
|
233
|
+
return;
|
|
234
|
+
}
|
|
235
|
+
|
|
236
|
+
this.skybox.SetVector(RotationAxisProperty, this.axis);
|
|
237
|
+
}
|
|
238
|
+
|
|
239
|
+
private void Update()
|
|
240
|
+
{
|
|
241
|
+
this.angle += this.angularSpeed * Time.deltaTime;
|
|
242
|
+
this.skybox.SetFloat(RotationProperty, this.angle);
|
|
243
|
+
}
|
|
244
|
+
}
|
|
245
|
+
```
|