User Guide

942 Chapter 14: Properties

quality (3D)

Usage

member(whichCastmember).texture(whichTexture).quality

member(whichCastmember).shader(whichShader).texture\

(whichTexture).quality

member(whichCastmember).model(whichModel).shader.texture\

(whichTexture).quality

member( whichCastmember ).model( whichModel ).\

shader.texturelist[TextureListIndex].quality

member(whichCastmember).model(whichModel).shaderList\

[shaderListIndex]. texture(whichTexture).quality

member( whichCastmember ).model( whichModel ).shaderList\

[ shaderListIndex ]. texturelist[ TextureListIndex ].quality

Description

3D texture property; lets you get or set the image quality of a texture by controlling the level of

mipmapping applied to the texture. Mipmapping is a process by which additional versions of the

texture image are created in several sizes that are smaller than the original image. The 3D Xtra

extension then uses whichever version of the image is most appropriate to the current size of the

model on the screen and changes the version of the image that is being used when needed.

Trilinear mipmapping is higher in quality and uses more memory than bilinear mipmapping.

Mipmapping is not the same as filtering, although both improve texture appearance. Filtering

spreads errors out across the texture’s area so that errors are less concentrated. Mipmapping

resamples the image to make it the appropriate size.

This property can have the following values:

• #low is the same as off, and mipmapping is not used for the texture.

• #medium enables a low-quality (bilinear) mipmapping for the texture.

• #high enables a high-quality (trilinear) mipmapping for the texture.

The default is

#low.

Example

This statement sets the quality property of the texture Marsmap to #medium:

member("scene").texture("Marsmap").quality = #medium