195 lines
7.0 KiB
JavaScript
195 lines
7.0 KiB
JavaScript
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/**
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* 检测2个物体是否碰撞
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* @param object1 物体1
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* @param object2 物体2
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* @param overlap 允许重叠的大小
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* @returns {Boolean} 如果碰撞了，返回true
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*/
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function CheckIntersect(object1, object2, overlap)
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{
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// x-轴 x-轴
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// A1------>B1 C1 A2------>B2 C2
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// +--------+ ^ +--------+ ^
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// | object1| | y-轴 | object2| | y-轴
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// | | | | | |
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// +--------+ D1 +--------+ D2
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//
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//overlap是重叠的区域值
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A1 = object1.x + overlap;
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B1 = object1.x + object1.size - overlap;
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C1 = object1.y + overlap;
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D1 = object1.y + object1.size - overlap;
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A2 = object2.x + overlap;
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B2 = object2.x + object2.size - overlap;
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C2 = object2.y + overlap;
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D2 = object2.y + object2.size - overlap;
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//假如他们在x-轴重叠
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if(A1 >= A2 && A1 <= B2
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|| B1 >= A2 && B1 <= B2)
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{
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//判断y-轴重叠
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if(C1 >= C2 && C1 <= D2 || D1 >= C2 && D1 <= D2)
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{
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return true;
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}
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}
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return false;
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}
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/**
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* 坦克与地图块碰撞
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* @param tank 坦克对象
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* @param mapobj 地图对象
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* @returns {Boolean} 如果碰撞，返回true
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*/
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function tankMapCollision(tank,mapobj){
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//移动检测，记录最后一次的移动方向，根据方向判断+-overlap,
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var tileNum = 0;//需要检测的tile数
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var rowIndex = 0;//map中的行索引
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var colIndex = 0;//map中的列索引
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var overlap = 3;//允许重叠的大小
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//根据tank的x、y计算出map中的row和col
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if(tank.dir == UP){
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rowIndex = parseInt((tank.tempY + overlap - mapobj.offsetY)/mapobj.tileSize);
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colIndex = parseInt((tank.tempX + overlap- mapobj.offsetX)/mapobj.tileSize);
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}else if(tank.dir == DOWN){
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//向下，即dir==1的时候，行索引的计算需要+tank.Height
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rowIndex = parseInt((tank.tempY - overlap - mapobj.offsetY + tank.size)/mapobj.tileSize);
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colIndex = parseInt((tank.tempX + overlap- mapobj.offsetX)/mapobj.tileSize);
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}else if(tank.dir == LEFT){
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rowIndex = parseInt((tank.tempY + overlap- mapobj.offsetY)/mapobj.tileSize);
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colIndex = parseInt((tank.tempX + overlap - mapobj.offsetX)/mapobj.tileSize);
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}else if(tank.dir == RIGHT){
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rowIndex = parseInt((tank.tempY + overlap- mapobj.offsetY)/mapobj.tileSize);
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//向右，即dir==3的时候，列索引的计算需要+tank.Height
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colIndex = parseInt((tank.tempX - overlap - mapobj.offsetX + tank.size)/mapobj.tileSize);
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}
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if(rowIndex >= mapobj.HTileCount || rowIndex < 0 || colIndex >= mapobj.wTileCount || colIndex < 0){
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return true;
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}
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if(tank.dir == UP || tank.dir == DOWN){
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var tempWidth = parseInt(tank.tempX - map.offsetX - (colIndex)*mapobj.tileSize + tank.size - overlap);//去除重叠部分
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if(tempWidth % mapobj.tileSize == 0 ){
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tileNum = parseInt(tempWidth/mapobj.tileSize);
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}else{
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tileNum = parseInt(tempWidth/mapobj.tileSize) + 1;
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}
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for(var i=0;i<tileNum && colIndex+i < mapobj.wTileCount ;i++){
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var mapContent = mapobj.mapLevel[rowIndex][colIndex+i];
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if(mapContent == WALL || mapContent == GRID || mapContent == WATER || mapContent == HOME || mapContent == ANOTHREHOME){
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if(tank.dir == UP){
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tank.y = mapobj.offsetY + rowIndex * mapobj.tileSize + mapobj.tileSize - overlap;
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}else if(tank.dir == DOWN){
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tank.y = mapobj.offsetY + rowIndex * mapobj.tileSize - tank.size + overlap;
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}
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return true;
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}
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}
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}else{
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var tempHeight = parseInt(tank.tempY - map.offsetY - (rowIndex)*mapobj.tileSize + tank.size - overlap);//去除重叠部分
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if(tempHeight % mapobj.tileSize == 0 ){
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tileNum = parseInt(tempHeight/mapobj.tileSize);
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}else{
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tileNum = parseInt(tempHeight/mapobj.tileSize) + 1;
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}
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for(var i=0;i<tileNum && rowIndex+i < mapobj.HTileCount;i++){
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var mapContent = mapobj.mapLevel[rowIndex+i][colIndex];
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if(mapContent == WALL || mapContent == GRID || mapContent == WATER || mapContent == HOME || mapContent == ANOTHREHOME){
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if(tank.dir == LEFT){
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tank.x = mapobj.offsetX + colIndex * mapobj.tileSize + mapobj.tileSize - overlap;
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}else if(tank.dir == RIGHT){
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tank.x = mapobj.offsetX + colIndex * mapobj.tileSize - tank.size + overlap;
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}
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return true;
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}
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}
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}
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return false;
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}
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/**
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* 子弹与地图块的碰撞
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* @param bullet 子弹对象
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* @param mapobj 地图对象
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*/
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function bulletMapCollision(bullet,mapobj){
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var tileNum = 0;//需要检测的tile数
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var rowIndex = 0;//map中的行索引
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var colIndex = 0;//map中的列索引
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var mapChangeIndex = [];//map中需要更新的索引数组
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var result = false;//是否碰撞
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//根据bullet的x、y计算出map中的row和col
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if(bullet.dir == UP){
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rowIndex = parseInt((bullet.y - mapobj.offsetY)/mapobj.tileSize);
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colIndex = parseInt((bullet.x - mapobj.offsetX)/mapobj.tileSize);
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}else if(bullet.dir == DOWN){
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//向下，即dir==1的时候，行索引的计算需要+bullet.Height
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rowIndex = parseInt((bullet.y - mapobj.offsetY + bullet.size)/mapobj.tileSize);
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colIndex = parseInt((bullet.x - mapobj.offsetX)/mapobj.tileSize);
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}else if(bullet.dir == LEFT){
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rowIndex = parseInt((bullet.y - mapobj.offsetY)/mapobj.tileSize);
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colIndex = parseInt((bullet.x - mapobj.offsetX)/mapobj.tileSize);
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}else if(bullet.dir == RIGHT){
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rowIndex = parseInt((bullet.y - mapobj.offsetY)/mapobj.tileSize);
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//向右，即dir==3的时候，列索引的计算需要+bullet.Height
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colIndex = parseInt((bullet.x - mapobj.offsetX + bullet.size)/mapobj.tileSize);
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}
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if(rowIndex >= mapobj.HTileCount || rowIndex < 0 || colIndex >= mapobj.wTileCount || colIndex < 0){
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return true;
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}
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if(bullet.dir == UP || bullet.dir == DOWN){
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var tempWidth = parseInt(bullet.x - map.offsetX - (colIndex)*mapobj.tileSize + bullet.size);
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if(tempWidth % mapobj.tileSize == 0 ){
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tileNum = parseInt(tempWidth/mapobj.tileSize);
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}else{
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tileNum = parseInt(tempWidth/mapobj.tileSize) + 1;
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}
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for(var i=0;i<tileNum && colIndex+i < mapobj.wTileCount ;i++){
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var mapContent = mapobj.mapLevel[rowIndex][colIndex+i];
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if(mapContent == WALL || mapContent == GRID || mapContent == HOME || mapContent == ANOTHREHOME){
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//bullet.distroy();
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result = true;
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if(mapContent == WALL){
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//墙被打掉
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mapChangeIndex.push([rowIndex,colIndex+i]);
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}else if(mapContent == GRID){
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}else{
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isGameOver = true;
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break;
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}
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}
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}
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}else{
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var tempHeight = parseInt(bullet.y - map.offsetY - (rowIndex)*mapobj.tileSize + bullet.size);
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if(tempHeight % mapobj.tileSize == 0 ){
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tileNum = parseInt(tempHeight/mapobj.tileSize);
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}else{
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tileNum = parseInt(tempHeight/mapobj.tileSize) + 1;
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}
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for(var i=0;i<tileNum && rowIndex+i < mapobj.HTileCount;i++){
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var mapContent = mapobj.mapLevel[rowIndex+i][colIndex];
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if(mapContent == WALL || mapContent == GRID || mapContent == HOME || mapContent == ANOTHREHOME){
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//bullet.distroy();
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result = true;
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if(mapContent == WALL){
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//墙被打掉
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mapChangeIndex.push([rowIndex+i,colIndex]);
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}else if(mapContent == GRID){
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}else{
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isGameOver = true;
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break;
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}
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}
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}
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}
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//更新地图
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map.updateMap(mapChangeIndex,0);
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return result;
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}
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