cocos-enhance-kit/engine/cocos2d/tilemap/tmx-layer-assembler.js

/****************************************************************************
 Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

 https://www.cocos.com/

 Permission is hereby granted, free of charge, to any person obtaining a copy
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import Assembler from '../core/renderer/assembler';

const TiledLayer = require('./CCTiledLayer');
const TiledMap = require('./CCTiledMap');
const TileFlag = TiledMap.TileFlag;
const FLIPPED_MASK = TileFlag.FLIPPED_MASK;

const renderer = require('../core/renderer/');
const vfmtPosUvColor = require('../core/renderer/webgl/vertex-format').vfmtPosUvColor;

const MaxGridsLimit = parseInt(65535 / 6);
const RenderOrder = TiledMap.RenderOrder;

import { Mat4, Vec3 } from '../core/value-types';

const RenderFlow = require('../core/renderer/render-flow');

let _mat4_temp = cc.mat4();
let _vec3_temp = cc.v3();
let _leftDown = {row:0, col:0};
let _uva = {x:0, y:0};
let _uvb = {x:0, y:0};
let _uvc = {x:0, y:0};
let _uvd = {x:0, y:0};

let _renderData = null, _ia = null, _fillGrids = 0,
    _vfOffset = 0, _moveX = 0, _moveY = 0, _layerMat = null,
    _renderer = null, _renderDataList = null, _buffer = null, 
    _curMaterial = null, _comp = null, _vbuf = null, _uintbuf = null;

function _visitUserNode (userNode) {
    if (CC_NATIVERENDERER) return;
    userNode._updateLocalMatrix();
    Mat4.mul(userNode._worldMatrix, _layerMat, userNode._matrix);
    userNode._renderFlag &= ~(RenderFlow.FLAG_TRANSFORM | RenderFlow.FLAG_BREAK_FLOW);
    RenderFlow.visitRootNode(userNode);
    userNode._renderFlag |= RenderFlow.FLAG_BREAK_FLOW;
}

function _flush () {
    if (_ia._count === 0) {
        return;
    }

    _renderer.material = _renderData.material;
    _renderer.node = _comp.node;
    _renderer._flushIA(_renderData.ia);

    let needSwitchBuffer = (_fillGrids >= MaxGridsLimit);
    if (needSwitchBuffer) {
        _buffer.uploadData();
        _buffer.switchBuffer();
        _vbuf = _buffer._vData;
        _uintbuf = _buffer._uintVData;
        _renderData = _renderDataList.popRenderData(_buffer);
        _ia = _renderData.ia;
        _vfOffset = 0;
        _fillGrids = 0;
    } else {
        _renderData = _renderDataList.popRenderData(_buffer);
        _ia = _renderData.ia;
    }
    _renderData.material = _curMaterial;
}

function _renderNodes (nodeRow, nodeCol) {
    let nodesInfo = _comp._getNodesByRowCol(nodeRow, nodeCol);
    if (!nodesInfo || nodesInfo.count == 0) return;
    let nodesList = nodesInfo.list;
    let newIdx = 0, oldIdx = 0;
    // flush map render data
    _flush();

    _renderer.worldMatDirty++;
    // begin to render nodes
    for (; newIdx < nodesInfo.count; ) {
        let dataComp = nodesList[oldIdx];
        oldIdx++;
        if (!dataComp) continue;
        _visitUserNode(dataComp.node);
        if (newIdx !== oldIdx) {
            nodesList[newIdx] = dataComp;
            dataComp._index = newIdx;
        }
        newIdx++;
    }
    nodesList.length = newIdx;
    _renderer.worldMatDirty--;

    _renderDataList.pushNodesList(_renderData, nodesList);

    // flush user nodes render data
    _renderer._flush();
    _renderer.node = _comp.node;
}

/*
texture coordinate
a b 
c d
*/
function _flipTexture (inGrid, gid) {
    _uva.x = inGrid.l;
    _uva.y = inGrid.t;
    _uvb.x = inGrid.r;
    _uvb.y = inGrid.t;
    _uvc.x = inGrid.l;
    _uvc.y = inGrid.b;
    _uvd.x = inGrid.r;
    _uvd.y = inGrid.b;

    let tempVal = null;

    // vice
    if ((gid & TileFlag.DIAGONAL) >>> 0) {
        tempVal = _uvb;
        _uvb = _uvc;
        _uvc = tempVal;
    }

    // flip x
    if ((gid & TileFlag.HORIZONTAL) >>> 0) {
        tempVal = _uva;
        _uva = _uvb;
        _uvb = tempVal;

        tempVal = _uvc;
        _uvc = _uvd;
        _uvd = tempVal;
    }

    // flip y
    if ((gid & TileFlag.VERTICAL) >>> 0) {
        tempVal = _uva;
        _uva = _uvc;
        _uvc = tempVal;

        tempVal = _uvb;
        _uvb = _uvd;
        _uvd = tempVal;
    }
};

export default class TmxAssembler extends Assembler {
    updateRenderData (comp) {
        if (!comp._renderDataList) {
            comp._buffer = new cc.TiledMapBuffer(renderer._handle, vfmtPosUvColor);
            comp._renderDataList = new cc.TiledMapRenderDataList();
        }
    }

    fillBuffers (comp, renderer) {
        let vertices = comp._vertices;
        if (vertices.length === 0 ) return;

        comp._updateCulling();

        let layerNode = comp.node;
        _moveX = comp._leftDownToCenterX;
        _moveY = comp._leftDownToCenterY;
        _layerMat = layerNode._worldMatrix;
        _renderer = renderer;
        _comp = comp;
        _renderDataList = comp._renderDataList;
        _buffer = comp._buffer;

        if (comp._isCullingDirty() || comp._isUserNodeDirty() || comp._hasAnimation() || comp._hasTiledNode()) {
            _buffer.reset();

            let leftDown, rightTop;
            if (comp._enableCulling) {
               let cullingRect = comp._cullingRect;
               leftDown = cullingRect.leftDown;
               rightTop = cullingRect.rightTop;
            } else {
                leftDown = _leftDown;
                rightTop = comp._rightTop;
            }

            let maxRows = rightTop.row - leftDown.row + 1;
            let maxCols = rightTop.col - leftDown.col + 1;
            let maxGrids = maxRows * maxCols;
            if (maxGrids > MaxGridsLimit) {
                maxGrids = MaxGridsLimit;
            }

            _buffer.request(maxGrids * 4, maxGrids * 6);

            switch (comp._renderOrder) {
                // left top to right down, col add, row sub, 
                case RenderOrder.RightDown:
                    this.traverseGrids(leftDown, rightTop, -1, 1);
                    break;
                // right top to left down, col sub, row sub
                case RenderOrder.LeftDown:
                    this.traverseGrids(leftDown, rightTop, -1, -1);
                    break;
                // left down to right up, col add, row add
                case RenderOrder.RightUp:
                    this.traverseGrids(leftDown, rightTop, 1, 1);
                    break;
                // right down to left up, col sub, row add
                case RenderOrder.LeftUp:
                    this.traverseGrids(leftDown, rightTop, 1, -1);
                    break;
            }
            comp._setCullingDirty(false);
            comp._setUserNodeDirty(false);

        } else if (!CC_NATIVERENDERER) {
            let renderData = null;
            let nodesRenderList = null;
            let nodesList = null;

            for (let i = 0; i < _renderDataList._offset; i++) {
                renderData = _renderDataList._dataList[i];
                nodesRenderList = renderData.nodesRenderList;
                if (nodesRenderList.length > 0) {
                    renderer.worldMatDirty++;
                    for (let j = 0; j < nodesRenderList.length; j++) {
                        nodesList = nodesRenderList[j];
                        if (!nodesList) continue;
                        for (let idx = 0; idx < nodesList.length; idx++) {
                            let dataComp = nodesList[idx];
                            if (!dataComp) continue;
                            _visitUserNode(dataComp.node);
                        }
                    }
                    renderer.worldMatDirty--;
                    renderer._flush();
                }
                if (renderData.ia._count > 0) {
                    renderer.material = renderData.material;
                    renderer.node = layerNode;
                    renderer._flushIA(renderData.ia);
                }
            }
        }

        _renderData = null;
        _ia = null;
        _layerMat = null;
        _renderer = null;
        _renderDataList = null;
        _buffer = null;
        _curMaterial = null;
        _comp = null;

        _vbuf = null;
        _uintbuf = null;
    }

    // rowMoveDir is -1 or 1, -1 means decrease, 1 means increase
    // colMoveDir is -1 or 1, -1 means decrease, 1 means increase
    traverseGrids (leftDown, rightTop, rowMoveDir, colMoveDir) {
        _renderDataList.reset();

        // show nothing
        if (rightTop.row < 0 || rightTop.col < 0) return;

        _renderData = _renderDataList.popRenderData(_buffer);
        _ia = _renderData.ia;
        _vbuf = _buffer._vData;
        _uintbuf = _buffer._uintVData;
        _fillGrids = 0;
        _vfOffset = 0;
        _curMaterial = null;

        let layerNode = _comp.node;
        let pOpacity = layerNode.parent ? layerNode.parent._opacity / 255 : 1.0;
        let opacity = pOpacity * layerNode._opacity;
        layerNode._color._fastSetA(opacity);
        let color = layerNode._color._val;
        let tiledTiles = _comp._tiledTiles;
        let texGrids = _comp._texGrids;
        let tiles = _comp._tiles;
        let texIdToMatIdx = _comp._texIdToMatIndex;
        let mats = _comp._materials;

        let vertices = _comp._vertices;
        let rowData, col, cols, row, rows, colData, tileSize, grid = null, gid = 0;
        let left = 0, bottom = 0, right = 0, top = 0; // x, y
        let tiledNode = null, curTexIdx = -1, matIdx;
        let colNodesCount = 0, checkColRange = true;

        if (rowMoveDir == -1) {
            row = rightTop.row;
            rows = leftDown.row;
        } else {
            row = leftDown.row;
            rows = rightTop.row;
        }

        // traverse row
        for (; (rows - row) * rowMoveDir >= 0; row += rowMoveDir) {
            rowData = vertices[row];
            colNodesCount = _comp._getNodesCountByRow(row);
            checkColRange = (colNodesCount == 0 && rowData != undefined);

            // limit min col and max col
            if (colMoveDir == 1) {
                col = checkColRange && leftDown.col < rowData.minCol ? rowData.minCol : leftDown.col;
                cols = checkColRange && rightTop.col > rowData.maxCol ? rowData.maxCol : rightTop.col;
            } else {
                col = checkColRange && rightTop.col > rowData.maxCol ? rowData.maxCol : rightTop.col;
                cols = checkColRange && leftDown.col < rowData.minCol ? rowData.minCol : leftDown.col;
            }

            // traverse col
            for (; (cols - col) * colMoveDir >= 0; col += colMoveDir) {
                colData = rowData && rowData[col];
                if (!colData) {
                    // only render users nodes because map data is empty
                    if (colNodesCount > 0) _renderNodes(row, col);
                    continue;
                }

                gid = tiles[colData.index];
                grid = texGrids[(gid & FLIPPED_MASK) >>> 0];
                if (!grid) continue;

                // check init or new material
                if (curTexIdx !== grid.texId) {
                    // need flush
                    if (curTexIdx !== -1) {
                        _flush();
                    }
                    // update material
                    curTexIdx = grid.texId;
                    matIdx = texIdToMatIdx[curTexIdx];
                    _curMaterial = mats[matIdx];
                    _renderData.material = _curMaterial;
                }
                if (!_curMaterial) continue;

                // calc rect vertex
                left = colData.left - _moveX;
                bottom = colData.bottom - _moveY;
                tileSize = grid.tileset._tileSize;
                right = left + tileSize.width;
                top = bottom + tileSize.height;

                // begin to fill vertex buffer
                tiledNode = tiledTiles[colData.index];
                if (!tiledNode) {
                    // tl
                    _vbuf[_vfOffset] = left;
                    _vbuf[_vfOffset + 1] = top;
                    _uintbuf[_vfOffset + 4] = color;

                    // bl
                    _vbuf[_vfOffset + 5] = left;
                    _vbuf[_vfOffset + 6] = bottom;
                    _uintbuf[_vfOffset + 9] = color;

                    // tr
                    _vbuf[_vfOffset + 10] = right;
                    _vbuf[_vfOffset + 11] = top;
                    _uintbuf[_vfOffset + 14] = color;

                    // br
                    _vbuf[_vfOffset + 15] = right;
                    _vbuf[_vfOffset + 16] = bottom;
                    _uintbuf[_vfOffset + 19] = color;
                } else {
                    if(tiledNode.node.active) {
                        tiledNode.node._color._fastSetA(tiledNode.node._opacity * opacity / 255);
                        this.fillByTiledNode(tiledNode.node, _vbuf, _uintbuf, left, right, top, bottom);
                    }
                }

                _flipTexture(grid, gid);

                // tl -> a
                _vbuf[_vfOffset + 2] = _uva.x;
                _vbuf[_vfOffset + 3] = _uva.y;

                // bl -> c
                _vbuf[_vfOffset + 7] = _uvc.x;
                _vbuf[_vfOffset + 8] = _uvc.y;

                // tr -> b
                _vbuf[_vfOffset + 12] = _uvb.x;
                _vbuf[_vfOffset + 13] = _uvb.y;

                // br -> d
                _vbuf[_vfOffset + 17] = _uvd.x;
                _vbuf[_vfOffset + 18] = _uvd.y;

                // modify buffer all kinds of offset
                _vfOffset += 20;
                _buffer.adjust(4, 6);
                _ia._count += 6;
                _fillGrids++;

                // check render users node
                if (colNodesCount > 0) _renderNodes(row, col);

                // vertices count exceed 66635, buffer must be switched
                if (_fillGrids >= MaxGridsLimit) {
                    _flush();
                }
            }
        }

        // upload buffer data
        _buffer.uploadData();

        // last flush
        if (_ia._count > 0) {
            _renderer.material = _renderData.material;
            _renderer.node = _comp.node;
            _renderer._flushIA(_renderData.ia);
        }
    }

    fillByTiledNode (tiledNode, vbuf, uintbuf, left, right, top, bottom) {
        tiledNode._updateLocalMatrix();
        Mat4.copy(_mat4_temp, tiledNode._matrix);
        Vec3.set(_vec3_temp, -(left + _moveX), -(bottom + _moveY), 0);
        Mat4.transform(_mat4_temp, _mat4_temp, _vec3_temp);
        let m = _mat4_temp.m;
        let a = m[0];
        let b = m[1];
        let c = m[4];
        let d = m[5];
        let tx = m[12];
        let ty = m[13];
        let color = tiledNode._color._val;

        // tl
        vbuf[_vfOffset] = left * a + top * c + tx;
        vbuf[_vfOffset + 1] = left * b + top * d + ty;
        uintbuf[_vfOffset + 4] = color;

        // bl
        vbuf[_vfOffset + 5] = left * a + bottom * c + tx;
        vbuf[_vfOffset + 6] = left * b + bottom * d + ty;
        uintbuf[_vfOffset + 9] = color;

        // tr
        vbuf[_vfOffset + 10] = right * a + top * c + tx;
        vbuf[_vfOffset + 11] = right * b + top * d + ty;
        uintbuf[_vfOffset + 14] = color;

        // br
        vbuf[_vfOffset + 15] = right * a + bottom * c + tx;
        vbuf[_vfOffset + 16] = right * b + bottom * d + ty;
        uintbuf[_vfOffset + 19] = color;
    }
}

Assembler.register(TiledLayer, TmxAssembler);