texture vex function

Contexts: displace , fog , light , photon , shadow , surface

Tags: file, map, shading

Computes a filtered sample of the texture map specified.

1. vector texture(string map)

2. vector4 texture(string map)

3. vector texture(string map, float ss, float tt)

4. vector4 texture(string map, float ss, float tt)

5. vector texture(string map, float s0, float t0, float s1, float t1, float s2, float t2, float s3, float t3)

6. vector4 texture(string map, float s0, float t0, float s1, float t1, float s2, float t2, float s3, float t3)

Computes a filtered sample of the texture map specified. If you don’t specify coordinates, the values of the s and t variables are used to index the texture.

The forms returning vector4 will have the alpha from the texture map in the fourth component.

You can optionally specify filtering options .