laya-coreui-es
Version:
laya核心库、ui库es版本，剔除了媒体、TTF等功能。基于 LayaAir-release_2.12.0 修改
118 lines (117 loc) • 3.61 kB
JavaScript
import { LayaGL } from "../../layagl/LayaGL";
import { BufferState2D } from "../BufferState2D";
import { Config } from "./../../../Config";
import { IndexBuffer2D } from "./IndexBuffer2D";
import { VertexBuffer2D } from "./VertexBuffer2D";
export class Mesh2D {
constructor(stride, vballoc, iballoc) {
this._stride = 0;
this.vertNum = 0;
this.indexNum = 0;
this._applied = false;
this._quadNum = 0;
this.canReuse = false;
this._stride = stride;
this._vb = new VertexBuffer2D(stride, LayaGL.instance.DYNAMIC_DRAW);
if (vballoc) {
this._vb._resizeBuffer(vballoc, false);
}
else {
Config.webGL2D_MeshAllocMaxMem && this._vb._resizeBuffer(64 * 1024 * stride, false);
}
this._ib = new IndexBuffer2D();
if (iballoc) {
this._ib._resizeBuffer(iballoc, false);
}
}
cloneWithNewVB() {
var mesh = new Mesh2D(this._stride, 0, 0);
mesh._ib = this._ib;
mesh._quadNum = this._quadNum;
mesh._attribInfo = this._attribInfo;
return mesh;
}
cloneWithNewVBIB() {
var mesh = new Mesh2D(this._stride, 0, 0);
mesh._attribInfo = this._attribInfo;
return mesh;
}
getVBW() {
this._vb.setNeedUpload();
return this._vb;
}
getVBR() {
return this._vb;
}
getIBR() {
return this._ib;
}
getIBW() {
this._ib.setNeedUpload();
return this._ib;
}
createQuadIB(QuadNum) {
this._quadNum = QuadNum;
this._ib._resizeBuffer(QuadNum * 6 * 2, false);
this._ib.byteLength = this._ib.bufferLength;
var bd = this._ib.getUint16Array();
var idx = 0;
var curvert = 0;
for (var i = 0; i < QuadNum; i++) {
bd[idx++] = curvert;
bd[idx++] = curvert + 2;
bd[idx++] = curvert + 1;
bd[idx++] = curvert;
bd[idx++] = curvert + 3;
bd[idx++] = curvert + 2;
curvert += 4;
}
this._ib.setNeedUpload();
}
setAttributes(attribs) {
this._attribInfo = attribs;
if (this._attribInfo.length % 3 != 0) {
throw 'Mesh2D setAttributes error!';
}
}
configVAO(gl) {
if (this._applied)
return;
this._applied = true;
if (!this._vao) {
this._vao = new BufferState2D();
}
this._vao.bind();
this._vb._bindForVAO();
this._ib.setNeedUpload();
this._ib._bind_uploadForVAO();
var attribNum = this._attribInfo.length / 3;
var idx = 0;
for (var i = 0; i < attribNum; i++) {
var _size = this._attribInfo[idx + 1];
var _type = this._attribInfo[idx];
var _off = this._attribInfo[idx + 2];
gl.enableVertexAttribArray(i);
gl.vertexAttribPointer(i, _size, _type, false, this._stride, _off);
idx += 3;
}
this._vao.unBind();
}
useMesh(gl) {
this._applied || this.configVAO(gl);
this._vao.bind();
this._vb.bind();
this._ib._bind_upload() || this._ib.bind();
this._vb._bind_upload() || this._vb.bind();
}
getEleNum() {
return this._ib.getBuffer().byteLength / 2;
}
releaseMesh() { }
destroy() {
}
clearVB() {
this._vb.clear();
}
}
Mesh2D._gvaoid = 0;