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UNITY_MATRIX_IT_MV[] Vectors in Shader
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UNITY_MATRIX_IT_MV[0].xyz = ??? | |
UNITY_MATRIX_IT_MV[1].xyz = Camera Up | |
UNITY_MATRIX_IT_MV[2].xyz = Camera Forward | |
float3 forward = -normalize(UNITY_MATRIX_V._m20_m21_m22); | |
float3 up = normalize(UNITY_MATRIX_V._m10_m11_m12); | |
float3 right = normalize(UNITY_MATRIX_V._m00_m01_m02); | |
float3 cameraUp = unity_CameraInvProjection[1].xyz; | |
float3 camRight = cross(unity_CameraInvProjection[2].xyz, cameraUp); | |
float3 cameraForward = cross(cameraUp, camRight); | |
Camera right direction = UNITY_MATRIX_V[0].xyz = mul((float3x3)UNITY_MATRIX_V,float3(1,0,0)); | |
Camera up direction = UNITY_MATRIX_V[1].xyz = mul((float3x3)UNITY_MATRIX_V,float3(0,1,0)); | |
Camera forward direction = UNITY_MATRIX_V[2].xyz = mul((float3x3)UNITY_MATRIX_V,float3(0,0,1)); | |
Camera position = _WorldSpaceCameraPos = mul(UNITY_MATRIX_V,float4(0,0,0,1)).xyz; | |
//http://forum.unity3d.com/threads/get-main-camera-up-direction.189947/#post-1297952 | |
// camera right | |
float3 right = cross(cameraUp, cameraForward); | |
// ?? | |
float4 objWorldPos=float4(_Object2World._m03,_Object2World._m13,_Object2World._m23, 1); | |
// references | |
// http://makegamessa.com/discussion/3368/facing-billboards-shader-in-unity | |
// http://www.codinglabs.net/article_world_view_projection_matrix.aspx | |
// http://answers.unity3d.com/questions/557922/rotate-a-mesh-on-world-y-axis-using-a-cg-vertex-sh.html | |
// scaling http://forum.unity3d.com/threads/scaling-in-the-vertex-shader.197815/ | |
// billboarding http://forum.unity3d.com/threads/leaf-card-billboards-camera-facing-matrix.186667/#post-1278929 | |
// http://forum.unity3d.com/threads/stream-out-for-geometry-shader.179377/ | |
// https://docs.unity3d.com/Manual/SL-UnityShaderVariables.html | |
// https://forum.unity.com/threads/standard-surface-shader-billboard.513060/#post-3359378 |
Thanks!
thx guy ,help me a lot
Awesome!
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Great reference, thanks for putting this here 👍