Lighting, Transparency, and Shading

Light sources, color shading, and object transparency

Functions

camlightCreate or move light object in camera coordinates
lightCreate light
lightangleCreate or position light object in spherical coordinates
lightingSpecify lighting algorithm
shadingSet color shading properties
diffuseCalculate diffuse reflectance
materialControl reflectance properties of surfaces and patches
specularCalculate specular reflectance
alimSet or query axes alpha limits
alphaAdd transparency to objects in axes
alphamapSpecify figure alphamap (transparency)

Topics

Lighting Overview

You can position light sources and adjust the characteristics of the objects that are reflecting the lights.

Selecting a Lighting Method

There are different methods used to calculate the face and edge coloring of lit objects, and the one you select depends on the results you want to obtain.

Reflectance Characteristics of Graphics Objects

You can specify the reflectance characteristics of patch and surface objects and thereby affect the way they look when lights are applied to the scene.

Add Transparency to Graphics Objects

The transparency of a graphics object determines the degree to which you can see through it. Add transparency to graphics objects to customize the look of your charts or reveal details about an object that are otherwise hidden.

Changing Transparency of Images, Patches or Surfaces

This example shows how to modify transparency of images, patches and surfaces.

Modify the Alphamap

Every figure has an associated alphamap, which is a vector of values ranging from 0 to 1. You can view or modify the alphamap.