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カメラ座標でrayを作成 #1

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カメラ座標でrayを作成 #1

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10 changes: 8 additions & 2 deletions RaymarchingTutorial/Assets/RaymarchingTutorial/08_RaymarchingWithUnityCamera.shader
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Original file line number Diff line number Diff line change
Expand Up @@ -154,13 +154,19 @@

// UVを -1～1 の範囲に変換します
float2 uv = 2.0 * input.uv - 1.0;

float fov = 60;
float degree2rad = UNITY_PI/180.0f;
float tangent = tan(fov*degree2rad*0.5);
float3 viewRay = float3(uv*tangent, -1);
viewRay = normalize(viewRay);

// カメラの位置
float3 cameraOrigin = _WorldSpaceCameraPos;

// カメラ行列からレイを生成します
float4 clipRay = float4(uv, 1, 1);// クリップ空間のレイ
float3 viewRay = normalize(mul(unity_CameraInvProjection, clipRay).xyz);// ビュー空間のレイ
//float4 clipRay = float4(uv, 1, 1);// クリップ空間のレイ
//float3 viewRay = normalize(mul(unity_CameraInvProjection, clipRay).xyz);// ビュー空間のレイ
float3 ray = mul(transpose((float3x3)UNITY_MATRIX_V), viewRay);// ワールド空間のレイ

// レイマーチング
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