texni expression function

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

See also: tex, 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 not interpolate colors between pixels. For the interpolated version, use tex.

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

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