---
name: "POLYTYPE_GCOL"
section: "3alleg4"
platform: "linux"
package: "allegro4-doc"
version: "2:4.4.3.1-5"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/POLYTYPE_GCOL/3alleg4"
---

# POLYTYPE\_GCOL(3alleg4)

Polygon rendering mode type Allegro game programming library.

## NAME

POLYTYPE\_GCOL - Polygon rendering mode type Allegro game programming library.

## SYNOPSIS

**#include \<allegro.h\>**

**#define POLYTYPE\_GCOL**

## DESCRIPTION

A single-color gouraud shaded polygon. The colors for each vertex are taken from the \`c' value, and interpolated across the polygon. This is very fast, but will only work in 256-color modes if your palette contains a smooth gradient between the colors. In truecolor modes it interprets the color as a packed, display-format value as produced by the makecol() function.

## SEE ALSO

**polygon3d**(3alleg4), **makecol**(3alleg4), **ex3d**(3alleg4), **exscn3d**(3alleg4), **exzbuf**(3alleg4)