vertexProperty()

Sets the shader's vertex property or attribute variables.

An vertex property or vertex attribute is a variable belonging to a vertex in a shader. p5.js provides some default properties, such as aPosition, aNormal, aVertexColor, etc. These are set using vertex(), normal() and fill() respectively. Custom properties can also be defined within beginShape() and endShape().

The first parameter, propertyName, is a string with the property's name. This is the same variable name which should be declared in the shader, such as in vec3 aProperty, similar to .setUniform().

The second parameter, data, is the value assigned to the shader variable. This value will be applied to subsequent vertices created with vertex(). It can be a Number or an array of numbers, and in the shader program the type can be declared according to the WebGL specification. Common types include float, vec2, vec3, vec4 or matrices.

See also the vertexProperty() method on Geometry objects.