SideFX Houdini per pixel surface position and normals through whole scene











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how can I get per pixel all surface positions and normals of the whole scene.



I don't want to stop at the first hitten surface. I need to get information about all object.



For example a cube is in front of the sphere. The camera position just shows the cube - the sphere gets at that camera position by the cube. My output of every pixel position of my camera rendered image data gives me information of the surface position in world space and the normal of the cube at the first hit. Then again for the other side of the cube. Then the two surfaces of the sphere.



How can that be achieved?



Thanks






shader scene surface normals houdini







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    up vote
    0
    down vote

    favorite












    how can I get per pixel all surface positions and normals of the whole scene.



    I don't want to stop at the first hitten surface. I need to get information about all object.



    For example a cube is in front of the sphere. The camera position just shows the cube - the sphere gets at that camera position by the cube. My output of every pixel position of my camera rendered image data gives me information of the surface position in world space and the normal of the cube at the first hit. Then again for the other side of the cube. Then the two surfaces of the sphere.



    How can that be achieved?



    Thanks






    shader scene surface normals houdini







    share|improve this question
























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      how can I get per pixel all surface positions and normals of the whole scene.



      I don't want to stop at the first hitten surface. I need to get information about all object.



      For example a cube is in front of the sphere. The camera position just shows the cube - the sphere gets at that camera position by the cube. My output of every pixel position of my camera rendered image data gives me information of the surface position in world space and the normal of the cube at the first hit. Then again for the other side of the cube. Then the two surfaces of the sphere.



      How can that be achieved?



      Thanks






      shader scene surface normals houdini







      share|improve this question













      how can I get per pixel all surface positions and normals of the whole scene.



      I don't want to stop at the first hitten surface. I need to get information about all object.



      For example a cube is in front of the sphere. The camera position just shows the cube - the sphere gets at that camera position by the cube. My output of every pixel position of my camera rendered image data gives me information of the surface position in world space and the normal of the cube at the first hit. Then again for the other side of the cube. Then the two surfaces of the sphere.



      How can that be achieved?



      Thanks






      shader scene surface normals houdini




      shader scene surface normals houdini






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Nov 19 at 14:38









      TheT

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      32
























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          In Vex, you can use intersect_all to get all the intersections along a ray, and gather information about the surface, such as normals, using primuv.






          share|improve this answer





















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            1 Answer
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            active

            oldest

            votes








            1 Answer
            1






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes








            up vote
            0
            down vote



            accepted










            In Vex, you can use intersect_all to get all the intersections along a ray, and gather information about the surface, such as normals, using primuv.






            share|improve this answer

























              up vote
              0
              down vote



              accepted










              In Vex, you can use intersect_all to get all the intersections along a ray, and gather information about the surface, such as normals, using primuv.






              share|improve this answer























                up vote
                0
                down vote



                accepted







                up vote
                0
                down vote



                accepted






                In Vex, you can use intersect_all to get all the intersections along a ray, and gather information about the surface, such as normals, using primuv.






                share|improve this answer












                In Vex, you can use intersect_all to get all the intersections along a ray, and gather information about the surface, such as normals, using primuv.







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Nov 26 at 22:39









                Tim Harding

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