| |
| |
| |
|
|
| function WebGLAttributes( gl ) { |
|
|
| var buffers = new WeakMap(); |
|
|
| function createBuffer( attribute, bufferType ) { |
|
|
| var array = attribute.array; |
| var usage = attribute.dynamic ? gl.DYNAMIC_DRAW : gl.STATIC_DRAW; |
|
|
| var buffer = gl.createBuffer(); |
|
|
| gl.bindBuffer( bufferType, buffer ); |
| gl.bufferData( bufferType, array, usage ); |
|
|
| attribute.onUploadCallback(); |
|
|
| var type = gl.FLOAT; |
|
|
| if ( array instanceof Float32Array ) { |
|
|
| type = gl.FLOAT; |
|
|
| } else if ( array instanceof Float64Array ) { |
|
|
| console.warn( 'THREE.WebGLAttributes: Unsupported data buffer format: Float64Array.' ); |
|
|
| } else if ( array instanceof Uint16Array ) { |
|
|
| type = gl.UNSIGNED_SHORT; |
|
|
| } else if ( array instanceof Int16Array ) { |
|
|
| type = gl.SHORT; |
|
|
| } else if ( array instanceof Uint32Array ) { |
|
|
| type = gl.UNSIGNED_INT; |
|
|
| } else if ( array instanceof Int32Array ) { |
|
|
| type = gl.INT; |
|
|
| } else if ( array instanceof Int8Array ) { |
|
|
| type = gl.BYTE; |
|
|
| } else if ( array instanceof Uint8Array ) { |
|
|
| type = gl.UNSIGNED_BYTE; |
|
|
| } |
|
|
| return { |
| buffer: buffer, |
| type: type, |
| bytesPerElement: array.BYTES_PER_ELEMENT, |
| version: attribute.version |
| }; |
|
|
| } |
|
|
| function updateBuffer( buffer, attribute, bufferType ) { |
|
|
| var array = attribute.array; |
| var updateRange = attribute.updateRange; |
|
|
| gl.bindBuffer( bufferType, buffer ); |
|
|
| if ( attribute.dynamic === false ) { |
|
|
| gl.bufferData( bufferType, array, gl.STATIC_DRAW ); |
|
|
| } else if ( updateRange.count === - 1 ) { |
|
|
| |
|
|
| gl.bufferSubData( bufferType, 0, array ); |
|
|
| } else if ( updateRange.count === 0 ) { |
|
|
| console.error( 'THREE.WebGLObjects.updateBuffer: dynamic THREE.BufferAttribute marked as needsUpdate but updateRange.count is 0, ensure you are using set methods or updating manually.' ); |
|
|
| } else { |
|
|
| gl.bufferSubData( bufferType, updateRange.offset * array.BYTES_PER_ELEMENT, |
| array.subarray( updateRange.offset, updateRange.offset + updateRange.count ) ); |
|
|
| updateRange.count = - 1; |
|
|
| } |
|
|
| } |
|
|
| |
|
|
| function get( attribute ) { |
|
|
| if ( attribute.isInterleavedBufferAttribute ) attribute = attribute.data; |
|
|
| return buffers.get( attribute ); |
|
|
| } |
|
|
| function remove( attribute ) { |
|
|
| if ( attribute.isInterleavedBufferAttribute ) attribute = attribute.data; |
|
|
| var data = buffers.get( attribute ); |
|
|
| if ( data ) { |
|
|
| gl.deleteBuffer( data.buffer ); |
|
|
| buffers.delete( attribute ); |
|
|
| } |
|
|
| } |
|
|
| function update( attribute, bufferType ) { |
|
|
| if ( attribute.isInterleavedBufferAttribute ) attribute = attribute.data; |
|
|
| var data = buffers.get( attribute ); |
|
|
| if ( data === undefined ) { |
|
|
| buffers.set( attribute, createBuffer( attribute, bufferType ) ); |
|
|
| } else if ( data.version < attribute.version ) { |
|
|
| updateBuffer( data.buffer, attribute, bufferType ); |
|
|
| data.version = attribute.version; |
|
|
| } |
|
|
| } |
|
|
| return { |
|
|
| get: get, |
| remove: remove, |
| update: update |
|
|
| }; |
|
|
| } |
|
|
|
|
| export { WebGLAttributes }; |
|
|
