// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)' // Copyright (c) 2015 Nora // Released under the MIT license // http://opensource.org/licenses/mit-license.php Shader "Theta/RealtimeEquirectangular1080p" { Properties { [NoScaleOffset] _MainTex("Texture", 2D) = "white" {} _UVOffset("UVOffset(Forward UV / Backward UV)", Vector) = (0.0, 0.0, 0.0, 0.0) [KeywordEnum(Theta S 1080p, Theta S, Theta, Insta360 Air)] _Mode("Mode", Int) = 0 } SubShader { Tags{ "RenderType" = "Overlay" "Queue" = "Overlay" "ForceNoShadowCasting" = "True" } // Tags{ "RenderType" = "Opaque" "Queue" = "Geometry" "ForceNoShadowCasting" = "True" } ZTest Always Cull Off ZWrite Off Pass { CGPROGRAM #pragma vertex vert #pragma fragment frag #pragma multi_compile _MODE_THETA_S_1080P _MODE_THETA_S _MODE_THETA _MODE_INSTA360_AIR #include "UnityCG.cginc" struct appdata { float4 vertex : POSITION; float2 uv : TEXCOORD0; }; struct v2f { float2 uv : TEXCOORD0; float4 vertex : SV_POSITION; }; sampler2D _MainTex; float4 _UVOffset; #if defined(_MODE_THETA_S_1080P) #define _RADIUS 0.4425 #define _TEXTURE_Y_OFFSET 0 #define _TEXTURE_Y_SCALE (640.0 / 720.0) #define _FORWARD_ROTATION_DEGREE 0 #define _BACKWARD_ROTATION_DEGREE 0 #elif defined(_MODE_THETA_S) #define _RADIUS 0.445 #define _TEXTURE_Y_OFFSET ((720.0 - 640.0) / 720.0) #define _TEXTURE_Y_SCALE (640.0 / 720.0) #define _FORWARD_ROTATION_DEGREE 0 #define _BACKWARD_ROTATION_DEGREE 0 #elif defined(_MODE_INSTA360_AIR) #define _INSTA360_AIR_SENSOR_ROTATION_DEGREE 4.0 #define _RADIUS 0.47 #define _TEXTURE_Y_OFFSET 0 #define _TEXTURE_Y_SCALE 1 #define _FORWARD_ROTATION_DEGREE (-90 + _INSTA360_AIR_SENSOR_ROTATION_DEGREE) #define _BACKWARD_ROTATION_DEGREE (90 + _INSTA360_AIR_SENSOR_ROTATION_DEGREE) #else #define _RADIUS 0.445 #define _TEXTURE_Y_OFFSET 0 #define _TEXTURE_Y_SCALE 1 #define _FORWARD_ROTATION_DEGREE 0 #define _BACKWARD_ROTATION_DEGREE 0 #endif v2f vert (appdata v) { v2f o; // MVP行列を掛ける // mul(UNITY_MATRIX_MVP, v.vertex)と同じ処理だけどパフォーマンス良いらしい o.vertex = UnityObjectToClipPos(v.vertex); o.uv = v.uv; // プラットフォームによる射影行列の違いを吸収 o.uv.y *= _ProjectionParams.x; return o; } // ２次元変換行列 （３次元目は平行移動用に使う） float3x3 rotate_matrix_radian(float rot) { float sinX = sin(rot); float cosX = cos(rot); return float3x3(cosX, -sinX, 0, sinX, cosX, 0, 0, 0, 1); } // Scale/Rotate/Translate Matrix群 float3x3 rotate_matrix_degree(float rot) { return rotate_matrix_radian(rot * UNITY_PI / 180.0); } float3x3 scale_matrix(float2 scale) { return float3x3(scale.x, 0, 0, 0, scale.y, 0, 0, 0, 1); } float3x3 scaleX_matrix(float x) { return float3x3(x, 0, 0, 0, 1, 0, 0, 0, 1); } float3x3 scaleY_matrix(float y) { return float3x3(1, 0, 0, 0, y, 0, 0, 0, 1); } float3x3 translate_matrix(float2 vec) { return float3x3(1, 0, 0, 0, 1, 0, vec.x, vec.y, 1); } float3x3 translateX_matrix(float x) { return float3x3(1, 0, 0, 0, 1, 0, x, 0, 1); } float3x3 translateY_matrix(float y) { return float3x3(1, 0, 0, 0, 1, 0, 0, y, 1); } float3x3 texture_matrix3() { float3x3 mat = float3x3(1, 0, 0, 0, 1, 0, 0, 0, 1); mat = mul(mat, scaleY_matrix(_TEXTURE_Y_SCALE)); mat = mul(mat, translateY_matrix(_TEXTURE_Y_OFFSET)); return mat; } // forward用変換行列 // (0,0)を中心として半径1の範囲の座標、をテクスチャ座標に変換するmatrix // 計算量多いようだが、すべてコンパイル時に解決されるはず。 float3x3 forward_matrix3() { float3x3 mat = float3x3(1, 0, 0, 0, 1, 0, 0, 0, 1); mat = mul(mat, rotate_matrix_degree(_FORWARD_ROTATION_DEGREE)); mat = mul(mat, translate_matrix(float2(0.5, 0.5))); // 裏側なので逆方向にする mat = mul(mat, scaleX_matrix(-1)); mat = mul(mat, translateX_matrix(1)); // XのUV幅は半分なので x0.5 mat = mul(mat, scaleX_matrix(0.5)); // オフセット mat = mul(mat, translate_matrix(_UVOffset.yx)); mat = mul(mat, texture_matrix3()); return mat; } // backward用変換行列 // (0,0)を中心として半径1の範囲の座標、をテクスチャ座標に変換するmatrix // 計算量多いようだが、すべてコンパイル時に解決されるはず。 float3x3 backward_matrix3() { float3x3 mat = float3x3(1, 0, 0, 0, 1, 0, 0, 0, 1); mat = mul(mat, rotate_matrix_degree(_BACKWARD_ROTATION_DEGREE)); mat = mul(mat, translate_matrix(float2(0.5, 0.5))); // 片目分のUV幅は半分なので x0.5 mat = mul(mat, scaleX_matrix(0.5)); // 右側なので +0.5 mat = mul(mat, translateX_matrix(0.5)); // Y逆方向 mat = mul(mat, scaleY_matrix(-1)); mat = mul(mat, translateY_matrix(1)); // オフセット mat = mul(mat, translate_matrix(_UVOffset.wz)); mat = mul(mat, texture_matrix3()); return mat; } float2 convert_for_forward(float2 st) { return mul(float3(st.x, st.y, 1), forward_matrix3()).xy; } float2 convert_for_backward(float2 st) { return mul(float3(st.x, st.y, 1), backward_matrix3()).xy; } float4 frag(v2f i) : SV_Target { // float2 revUV = i.uv; float2 revUV = float2(i.uv.x, 1.0 - i.uv.y); // THETAの画像そのままだと上下が入れ替わってしまうので対策 if (i.uv.x <= 0.5) { revUV.x = 1.0 - revUV.x * 2.0; } else { revUV.x = 1.0 - (revUV.x - 0.5) * 2.0; } revUV *= UNITY_PI; float3 p = float3(cos(revUV.x), cos(revUV.y), sin(revUV.x)); p.xz *= sqrt(1.0 - p.y * p.y); float r = 1.0 - asin(p.z) / (UNITY_PI / 2.0); float2 st = float2(p.y, p.x); st *= r / sqrt(1.0 - p.z * p.z); st *= _RADIUS; // stは (0,0)を中心としたFisheye座標 float4 col; if (i.uv.x <= 0.5) { // 後 st = convert_for_backward(st); #if !defined(SHADER_API_OPENGL) col = tex2Dlod(_MainTex, float4(st, 0.0, 0.0)); #else // Memo: OpenGL not supported tex2Dlod.( Texture should be setting to generateMipMap = off. ) col = tex2D(_MainTex, st); #endif } else { // 前 st = convert_for_forward(st); #if !defined(SHADER_API_OPENGL) col = tex2Dlod(_MainTex, float4(st, 0.0, 0.0)); #else // Memo: OpenGL not supported tex2Dlod.( Texture should be setting to generateMipMap = off. ) col = tex2D(_MainTex, st); #endif } return col; } ENDCG } } }