index-range

Vocabulary

gpu.render

Class description

Objects of this tuple class can be passed as the indexes slot of a render-set to instruct render to assemble primitives sequentially from a slice of the active vertex-array.

•	The start slot contains an integer value indicating the first element of the array to draw.
•	The count slot contains an integer value indicating the number of elements to draw.

See also

index-elements, multi-index-elements, multi-index-range

Definition

USING: math ;

IN: gpu.render

TUPLE: index-range
    { start integer read-only initial: 0 }
    { count integer read-only initial: 0 } ;

Methods

USING: accessors gpu.render gpu.render.private kernel opengl.gl
;

M: index-range render-vertex-indexes
    [ gl-primitive-mode ] [ [ start>> ] [ count>> ] bi ] bi*
    glDrawArrays ;


USING: accessors gpu.render gpu.render.private kernel opengl.gl
;

M: index-range render-vertex-indexes-instanced
    [ gl-primitive-mode ] [ [ start>> ] [ count>> ] bi ] [ ]
    tri* glDrawArraysInstanced ;