function painterSortStable( a, b ) {
if ( a.groupOrder !== b.groupOrder ) {
return a.groupOrder - b.groupOrder;
} else if ( a.renderOrder !== b.renderOrder ) {
return a.renderOrder - b.renderOrder;
} else if ( a.material.id !== b.material.id ) {
return a.material.id - b.material.id;
} else if ( a.z !== b.z ) {
return a.z - b.z;
} else {
return a.id - b.id;
}
}
function reversePainterSortStable( a, b ) {
if ( a.groupOrder !== b.groupOrder ) {
return a.groupOrder - b.groupOrder;
} else if ( a.renderOrder !== b.renderOrder ) {
return a.renderOrder - b.renderOrder;
} else if ( a.z !== b.z ) {
return b.z - a.z;
} else {
return a.id - b.id;
}
}
function WebGLRenderList() {
const renderItems = [];
let renderItemsIndex = 0;
const opaque = [];
const transmissive = [];
const transparent = [];
function init() {
renderItemsIndex = 0;
opaque.length = 0;
transmissive.length = 0;
transparent.length = 0;
}
function getNextRenderItem( object, geometry, material, groupOrder, z, group ) {
let renderItem = renderItems[ renderItemsIndex ];
if ( renderItem === undefined ) {
renderItem = {
id: object.id,
object: object,
geometry: geometry,
material: material,
groupOrder: groupOrder,
renderOrder: object.renderOrder,
z: z,
group: group
};
renderItems[ renderItemsIndex ] = renderItem;
} else {
renderItem.id = object.id;
renderItem.object = object;
renderItem.geometry = geometry;
renderItem.material = material;
renderItem.groupOrder = groupOrder;
renderItem.renderOrder = object.renderOrder;
renderItem.z = z;
renderItem.group = group;
}
renderItemsIndex ++;
return renderItem;
}
function push( object, geometry, material, groupOrder, z, group ) {
const renderItem = getNextRenderItem( object, geometry, material, groupOrder, z, group );
if ( material.transmission > 0.0 ) {
transmissive.push( renderItem );
} else if ( material.transparent === true ) {
transparent.push( renderItem );
} else {
opaque.push( renderItem );
}
}
function unshift( object, geometry, material, groupOrder, z, group ) {
const renderItem = getNextRenderItem( object, geometry, material, groupOrder, z, group );
if ( material.transmission > 0.0 ) {
transmissive.unshift( renderItem );
} else if ( material.transparent === true ) {
transparent.unshift( renderItem );
} else {
opaque.unshift( renderItem );
}
}
function sort( customOpaqueSort, customTransparentSort ) {
if ( opaque.length > 1 ) opaque.sort( customOpaqueSort || painterSortStable );
if ( transmissive.length > 1 ) transmissive.sort( customTransparentSort || reversePainterSortStable );
if ( transparent.length > 1 ) transparent.sort( customTransparentSort || reversePainterSortStable );
}
function finish() {
// Clear references from inactive renderItems in the list
for ( let i = renderItemsIndex, il = renderItems.length; i < il; i ++ ) {
const renderItem = renderItems[ i ];
if ( renderItem.id === null ) break;
renderItem.id = null;
renderItem.object = null;
renderItem.geometry = null;
renderItem.material = null;
renderItem.group = null;
}
}
return {
opaque: opaque,
transmissive: transmissive,
transparent: transparent,
init: init,
push: push,
unshift: unshift,
finish: finish,
sort: sort
};
}
function WebGLRenderLists() {
let lists = new WeakMap();
function get( scene, renderCallDepth ) {
const listArray = lists.get( scene );
let list;
if ( listArray === undefined ) {
list = new WebGLRenderList();
lists.set( scene, [ list ] );
} else {
if ( renderCallDepth >= listArray.length ) {
list = new WebGLRenderList();
listArray.push( list );
} else {
list = listArray[ renderCallDepth ];
}
}
return list;
}
function dispose() {
lists = new WeakMap();
}
return {
get: get,
dispose: dispose
};
}
export { WebGLRenderLists, WebGLRenderList };
