tex expression function

Returns the interpolated color of a point on an on-disk texture map.

See also: texni, pic, picni

Textures can be 1, 3 or 4 channel images containing 8-bit, 16-bit or floating point data.

color_type can be one of:

• r, R, or D_CR = Red channel

• g, G, or D_CG = Green channel

• b, B, or D_CB = Blue channel

• a, A, or D_CA = Alpha channel

• h, H, or D_CHUE = Color hue

• s, S, or D_CSAT = Color saturation

• v, V, or D_CVAL = Color value

• l, L, or D_CLUM = Color luminance

This function will interpolate colors smoothly between pixels. For the non-interpolated version, use texni.

When the color component asked for doesn’t match the format of the image, some default behaviour will be taken.

tex("Mandril.pic", $BBX, $BBY, r).