回答編集履歴
1
回転機能を追加
test
CHANGED
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@@ -26,6 +26,10 @@
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_NebulaColor2 ("Nebula Color 2", Color) = (0.25, 0, 0.25, 1)
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28
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29
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_Rotation ("Rotation Angle", Range(0.0, 360.0)) = 0.0
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30
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31
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_RotationAxis ("Rotation Axis", Vector) = (1.0, 0.0, 0.0, 0.0)
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32
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}
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SubShader
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@@ -62,6 +66,8 @@
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#pragma fragment frag
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69
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#include "UnityCG.cginc"
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70
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65
71
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struct appdata
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@@ -88,13 +94,43 @@
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88
94
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90
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97
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float _Rotation;
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98
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float3 _RotationAxis;
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102
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v2f vert(appdata v)
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{
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v2f o;
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float cosTheta;
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110
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111
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float sinTheta;
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112
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sincos(_Rotation * UNITY_PI / 180.0, sinTheta, cosTheta);
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114
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float cosThetaI = 1.0 - cosTheta;
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116
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float3 u = normalize(_RotationAxis);
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float3 u2 = u * u;
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float3 us = u * u.yzx;
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122
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float3x3 r = float3x3(
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cosTheta + u2.x * cosThetaI, -u.z * sinTheta + us.x * cosThetaI, u.y * sinTheta + us.z * cosThetaI,
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126
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127
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u.z * sinTheta + us.x * cosThetaI, cosTheta + u2.y * cosThetaI, -u.x * sinTheta + us.y * cosThetaI,
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128
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129
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-u.y * sinTheta + us.z * cosThetaI, u.x * sinTheta + us.y * cosThetaI, cosTheta + u2.z * cosThetaI
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);
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o.vertex = UnityObjectToClipPos(v.vertex);
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o.vertex = UnityObjectToClipPos(float4(mul(r, v.vertex.xyz), v.vertex.w));
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o.texcoord = v.texcoord;
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@@ -290,6 +326,8 @@
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+ dot(m1 * m1, float2(dot(p3, x3), dot(p4, x4))));
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}
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@@ -349,3 +387,103 @@
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```
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350
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351
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390
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391
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393
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**回転させる例**
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394
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395
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```C#
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396
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397
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using UnityEngine;
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398
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399
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400
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401
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public class ProceduralStarfieldRotor : MonoBehaviour
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402
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403
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{
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404
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405
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private static readonly int RotationProperty = Shader.PropertyToID("_Rotation");
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406
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407
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private static readonly int RotationAxisProperty = Shader.PropertyToID("_RotationAxis");
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408
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409
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410
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411
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[SerializeField] private float angularSpeed = 15.0f;
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412
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413
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[SerializeField] private Vector3 axis = Vector3.right;
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414
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415
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416
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417
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private Material skybox;
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418
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419
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private float angle;
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420
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421
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422
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423
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private void Start()
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424
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425
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{
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426
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427
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this.skybox = RenderSettings.skybox;
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428
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429
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if (this.skybox == null)
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430
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431
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{
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432
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433
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Debug.LogError("No Skybox.");
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434
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435
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this.enabled = false;
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436
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437
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return;
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438
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439
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}
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440
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441
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442
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443
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if (!this.skybox.HasProperty(RotationProperty))
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444
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445
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{
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446
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447
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Debug.LogError("Skybox does not have _Rotation.");
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448
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449
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this.enabled = false;
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450
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451
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return;
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452
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453
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}
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454
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455
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456
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457
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if (!this.skybox.HasProperty(RotationAxisProperty))
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458
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459
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{
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460
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461
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Debug.LogError("Skybox does not have _RotationAxis.");
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462
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463
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this.enabled = false;
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464
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465
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return;
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466
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467
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}
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468
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469
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470
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471
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this.skybox.SetVector(RotationAxisProperty, this.axis);
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472
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473
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}
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474
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475
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476
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477
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private void Update()
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478
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479
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{
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480
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481
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this.angle += this.angularSpeed * Time.deltaTime;
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482
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483
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this.skybox.SetFloat(RotationProperty, this.angle);
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484
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485
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}
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486
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+
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487
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}
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488
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489
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```
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