回答編集履歴
1
回転軸追加版を追記
answer
CHANGED
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@@ -78,4 +78,116 @@
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78
78
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79
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}
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81
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```
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82
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83
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**ZXY順オイラー角回転**
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84
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```ShaderLab
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85
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// Unity built-in shader source. Copyright (c) 2016 Unity Technologies. MIT license (see license.txt)
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86
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87
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Shader "Skybox/Cubemap (3-Axis Rotation)" {
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88
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Properties {
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89
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_Tint ("Tint Color", Color) = (.5, .5, .5, .5)
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90
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[Gamma] _Exposure ("Exposure", Range(0, 8)) = 1.0
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91
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92
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// 回転プロパティをX、Y、Zの3つに増やす
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93
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_RotationX ("Rotation X", Range(0, 360)) = 0
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94
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_RotationY ("Rotation Y", Range(0, 360)) = 0
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95
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_RotationZ ("Rotation Z", Range(0, 360)) = 0
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96
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97
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[NoScaleOffset] _Tex ("Cubemap (HDR)", Cube) = "grey" {}
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98
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}
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99
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100
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SubShader {
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Tags { "Queue"="Background" "RenderType"="Background" "PreviewType"="Skybox" }
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102
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Cull Off ZWrite Off
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103
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104
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Pass {
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105
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CGPROGRAM
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107
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#pragma vertex vert
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108
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#pragma fragment frag
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109
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#pragma target 2.0
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110
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111
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#include "UnityCG.cginc"
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112
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113
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samplerCUBE _Tex;
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114
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half4 _Tex_HDR;
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115
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half4 _Tint;
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116
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half _Exposure;
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117
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118
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// プロパティに合わせて回転角変数も3つに増やす
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119
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float _RotationX;
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120
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float _RotationY;
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121
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float _RotationZ;
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122
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123
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// 回転用関数の名前を変更、引数をfloatからfloat3に変更
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124
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float3 RotateAroundZXYInDegrees (float3 vertex, float3 degrees)
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125
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{
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126
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// サイン、コサインも3成分についてそれぞれ算出し...
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127
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float3 alpha = degrees * UNITY_PI / 180.0;
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128
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float3 sina, cosa;
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129
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sincos(alpha, sina, cosa);
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130
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131
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// 各軸周りの回転行列を作成し...
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132
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float3x3 rx = float3x3(
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1.0, 0.0, 0.0,
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0.0, cosa.x, -sina.x,
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135
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0.0, sina.x, cosa.x);
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136
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float3x3 ry = float3x3(
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cosa.y, 0.0, sina.y,
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0.0, 1.0, 0.0,
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-sina.y, 0.0, cosa.y);
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140
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float3x3 rz = float3x3(
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141
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cosa.z, -sina.z, 0.0,
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142
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sina.z, cosa.z, 0.0,
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143
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0.0, 0.0, 1.0);
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144
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145
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// Z軸、X軸、Y軸の順で回転を合成し...
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146
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float3x3 m = mul(ry, mul(rx, rz));
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147
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148
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// 回転を適用して返す
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149
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return mul(m, vertex);
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150
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}
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151
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152
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struct appdata_t {
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153
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float4 vertex : POSITION;
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154
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UNITY_VERTEX_INPUT_INSTANCE_ID
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};
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156
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157
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struct v2f {
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float4 vertex : SV_POSITION;
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159
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float3 texcoord : TEXCOORD0;
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160
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UNITY_VERTEX_OUTPUT_STEREO
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161
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};
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162
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v2f vert (appdata_t v)
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{
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165
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v2f o;
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166
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UNITY_SETUP_INSTANCE_ID(v);
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167
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UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(o);
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168
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169
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// 回転関数にX、Y、Z回転角を与える
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170
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float3 rotated = RotateAroundZXYInDegrees(v.vertex, float3(_RotationX, _RotationY, _RotationZ));
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171
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172
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o.vertex = UnityObjectToClipPos(rotated);
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173
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o.texcoord = v.vertex.xyz;
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174
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return o;
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175
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}
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176
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177
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fixed4 frag (v2f i) : SV_Target
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178
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{
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179
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half4 tex = texCUBE (_Tex, i.texcoord);
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180
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half3 c = DecodeHDR (tex, _Tex_HDR);
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181
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c = c * _Tint.rgb * unity_ColorSpaceDouble.rgb;
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182
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c *= _Exposure;
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183
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return half4(c, 1);
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184
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}
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185
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ENDCG
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186
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}
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187
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}
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188
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189
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+
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190
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Fallback Off
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191
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+
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192
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}
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81
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```
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