Vertex and Fragment Shader worldNormal

Question

How to access/calculate worldNormal in a Vertex and Fragment shader ?

Thanks a lot !

Tordin · Accepted Answer · 2013-07-10 13:35:56Z

2

Multiply the normal with the worldmatrix, not the world_view_projection.

do this in the vertex shader, and then pass the value down as a linear interpolation value. then you dont need to do it in the pixelshader.

answered Jul 10 '13 at 13:35

Tordin

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\$\begingroup\$ Like this ? o.WorldNormal = normalize( mul(float4(v.normal, 0.0), _Object2World).xyz); \$\endgroup\$ – MaT Jul 10 '13 at 13:37
\$\begingroup\$ Yes, that looks correct. \$\endgroup\$ – Tordin Jul 10 '13 at 13:50

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