/**
* @author mrdoob / http://mrdoob.com/
*/
import { Uint16BufferAttribute, Uint32BufferAttribute } from '../../core/BufferAttribute.js';
import { BufferGeometry } from '../../core/BufferGeometry.js';
import { arrayMax } from '../../utils.js';
function WebGLGeometries( gl, attributes, info ) {
var geometries = new WeakMap();
var wireframeAttributes = new WeakMap();
function onGeometryDispose( event ) {
var geometry = event.target;
var buffergeometry = geometries.get( geometry );
if ( buffergeometry.index !== null ) {
attributes.remove( buffergeometry.index );
}
for ( var name in buffergeometry.attributes ) {
attributes.remove( buffergeometry.attributes[ name ] );
}
geometry.removeEventListener( 'dispose', onGeometryDispose );
geometries.delete( geometry );
var attribute = wireframeAttributes.get( buffergeometry );
if ( attribute ) {
attributes.remove( attribute );
wireframeAttributes.delete( buffergeometry );
}
//
info.memory.geometries --;
}
function get( object, geometry ) {
var buffergeometry = geometries.get( geometry );
if ( buffergeometry ) return buffergeometry;
geometry.addEventListener( 'dispose', onGeometryDispose );
if ( geometry.isBufferGeometry ) {
buffergeometry = geometry;
} else if ( geometry.isGeometry ) {
if ( geometry._bufferGeometry === undefined ) {
geometry._bufferGeometry = new BufferGeometry().setFromObject( object );
}
buffergeometry = geometry._bufferGeometry;
}
geometries.set( geometry, buffergeometry );
info.memory.geometries ++;
return buffergeometry;
}
function update( geometry ) {
var index = geometry.index;
var geometryAttributes = geometry.attributes;
if ( index !== null ) {
attributes.update( index, gl.ELEMENT_ARRAY_BUFFER );
}
for ( var name in geometryAttributes ) {
attributes.update( geometryAttributes[ name ], gl.ARRAY_BUFFER );
}
// morph targets
var morphAttributes = geometry.morphAttributes;
for ( var name in morphAttributes ) {
var array = morphAttributes[ name ];
for ( var i = 0, l = array.length; i < l; i ++ ) {
attributes.update( array[ i ], gl.ARRAY_BUFFER );
}
}
}
function updateWireframeAttribute( geometry ) {
var indices = [];
var geometryIndex = geometry.index;
var geometryPosition = geometry.attributes.position;
var version = 0;
if ( geometryIndex !== null ) {
var array = geometryIndex.array;
version = geometryIndex.version;
for ( var i = 0, l = array.length; i < l; i += 3 ) {
var a = array[ i + 0 ];
var b = array[ i + 1 ];
var c = array[ i + 2 ];
indices.push( a, b, b, c, c, a );
}
} else {
var array = geometryPosition.array;
version = geometryPosition.version;
for ( var i = 0, l = ( array.length / 3 ) - 1; i < l; i += 3 ) {
var a = i + 0;
var b = i + 1;
var c = i + 2;
indices.push( a, b, b, c, c, a );
}
}
var attribute = new ( arrayMax( indices ) > 65535 ? Uint32BufferAttribute : Uint16BufferAttribute )( indices, 1 );
attribute.version = version;
attributes.update( attribute, gl.ELEMENT_ARRAY_BUFFER );
//
var previousAttribute = wireframeAttributes.get( geometry );
if ( previousAttribute ) attributes.remove( previousAttribute );
//
wireframeAttributes.set( geometry, attribute );
}
function getWireframeAttribute( geometry ) {
var currentAttribute = wireframeAttributes.get( geometry );
if ( currentAttribute ) {
var geometryIndex = geometry.index;
if ( geometryIndex !== null ) {
// if the attribute is obsolete, create a new one
if ( currentAttribute.version < geometryIndex.version ) {
updateWireframeAttribute( geometry );
}
}
} else {
updateWireframeAttribute( geometry );
}
return wireframeAttributes.get( geometry );
}
return {
get: get,
update: update,
getWireframeAttribute: getWireframeAttribute
};
}
export { WebGLGeometries };