mirror of
https://github.com/cocos/cocos-engine.git
synced 2026-09-24 09:42:13 +08:00
87 lines
3.2 KiB
TypeScript
87 lines
3.2 KiB
TypeScript
/*
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Copyright (c) 2020-2023 Xiamen Yaji Software Co., Ltd.
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https://www.cocos.com/
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights to
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use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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of the Software, and to permit persons to whom the Software is furnished to do so,
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subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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import { error } from '@base/debug';
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import { Attribute, Buffer, BufferInfo, Device, InputAssemblerInfo, AttributeName, BufferUsageBit, Format, MemoryUsageBit, InputAssembler } from '../gfx';
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import { IGeometry } from '../primitive/define';
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export function createIA (device: Device, data: IGeometry): InputAssembler | null {
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if (!data.positions) {
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error('The data must have positions field');
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return null;
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}
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const verts: number[] = [];
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const vcount = data.positions.length / 3;
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for (let i = 0; i < vcount; ++i) {
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verts.push(data.positions[3 * i], data.positions[3 * i + 1], data.positions[3 * i + 2]);
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if (data.normals) {
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verts.push(data.normals[3 * i], data.normals[3 * i + 1], data.normals[3 * i + 2]);
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}
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if (data.uvs) {
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verts.push(data.uvs[2 * i], data.uvs[2 * i + 1]);
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}
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if (data.colors) {
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verts.push(data.colors[3 * i], data.colors[3 * i + 1], data.colors[3 * i + 2]);
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}
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}
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const vfmt: Attribute[] = [];
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vfmt.push(new Attribute(AttributeName.ATTR_POSITION, Format.RGB32F));
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if (data.normals) {
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vfmt.push(new Attribute(AttributeName.ATTR_NORMAL, Format.RGB32F));
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}
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if (data.uvs) {
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vfmt.push(new Attribute(AttributeName.ATTR_TEX_COORD, Format.RG32F));
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}
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if (data.colors) {
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vfmt.push(new Attribute(AttributeName.ATTR_COLOR, Format.RGB32F));
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}
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const vb = device.createBuffer(new BufferInfo(
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BufferUsageBit.VERTEX | BufferUsageBit.TRANSFER_DST,
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MemoryUsageBit.DEVICE,
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verts.length * 4,
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verts.length * 4 / vcount,
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));
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vb.update(new Float32Array(verts));
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let ib: Buffer | null = null;
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if (data.indices) {
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ib = device.createBuffer(new BufferInfo(
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BufferUsageBit.INDEX | BufferUsageBit.TRANSFER_DST,
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MemoryUsageBit.DEVICE,
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data.indices.length * 2,
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2,
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));
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ib.update(new Uint16Array(data.indices));
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}
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return device.createInputAssembler(new InputAssemblerInfo(vfmt, [vb], ib));
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}
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