机器小伟与工程师阿伟的三维几何探索之旅
在星历2016年02月01日的银河系厄尔斯星球中华帝国江南行省，工程师阿伟与机器小伟一起观察立方体，并学习如何在三维坐标系中绘制立方体及其三视图。他们通过编程实现三维直角坐标系的绘制，以及立方体在不同角度的三视图展现，展示了对三维几何图形的理解与实践能力。
剧情提要：
[机器小伟]在[工程师阿伟]的陪同下进入练气期第八层功法的修炼，
这次要修炼的目标是[观察物体（二）]。
正剧开始：
星历2016年02月01日 13:20:45, 银河系厄尔斯星球中华帝国江南行省。
[工程师阿伟]正在和[机器小伟]一起观察着物体。
今天主要观察的是立方体，是要看它们的三视图：
既然立方体是属于三维的图形，那么再继续用二维的坐标系就不是那么合适了，于是阿伟就借着这个机会，新增了三维坐标系：
又新增了立方体的绘制和三视图的显示功能：
小伟画三视图可是画得非常的尽兴。
果然人生最大的乐趣还是在于画画。
接下来小伟充分开动起了脑筋：
然后又做了一个计数的题：
这下所有的功法内容可都学会了，小伟很开心。
下面，小伟就把他所做的展示出来，这些图真的是看了很心旷神怡啊。
<span style="font-size:18px;">function myDraw() {
var config = new PlotConfiguration();
config.init();
config.setPreference();
config.setSector(1,1,1,1);
config.axis2D(0, 0, 180);
var r = 50;
var dx = r*1.5, dy = r*1.5;
for (var i = 0; i < 3; i++) {
for (var j = 0; j < 3; j++) {
drawCubic(i * dx, j * dy, r, 'yellow');
}
}
}
/**
* @usage 绘制正方体
* @author mw
* @date 2016年02月01日 星期一 08:40:27
* @param
* @return
*
*/
function drawCubic(x0, y0, r, style) {
plot.save()
.translate(x0 + r/2, y0 - r/2);
style = style ? style : 'black';
//左下角[x0, y0，边长r
shape.fillDraw(shape.nEdge(0, 0,0.707*r, 4, 0), style);
shape.fillDraw(shape.paraquad(-0.5*r, 0.5*r, 0, r, r/2, Math.PI/4), style);
shape.strokeDraw(shape.paraquad(-0.5*r, 0.5*r, 0, r, r/2, Math.PI/4), 'white');
shape.fillDraw(shape.paraquad(0.5*r, -0.5*r, Math.PI/4, r/2, r, Math.PI/4), style);
shape.strokeDraw(shape.paraquad(0.5*r, -0.5*r, Math.PI/4, r/2, r, Math.PI/4), 'white');
plot.restore();
}
function myDraw() {
var config = new PlotConfiguration();
config.init();
config.setPreference();
config.setSector(1,1,1,1);
config.axis2D(0, 0, 180);
var r = 50;
var dx = r, dy = r;
for (var i = 0; i < 3; i++) {
for (var j = 2; j > 0; j--) {
drawCubic(i * dx, (j-2) * dy, r, 'red');
}
}
}
/**
* @usage 绘制三维直角坐标系
* @author mw
* @date 2016年02月01日 星期一 09:52:05
* @param
* @return
*
*/
this.axis3D = function(x, y, z, r, style) {
plot.save();
style = style ? style : 'black';
y = -y;
x = x-0.707*z;
y = y+0.707*z;
z = 0;
var zxOffset = z*0.707+x;
var zyOffset = z*0.707+y;
var zr = r*0.707;
plot.setFillStyle(style)
.setStrokeStyle(style);
plot.beginPath()
.moveTo(x-r,y)
.lineTo(x+r,y)
.closePath()
.stroke();
plot.beginPath()
.moveTo(x,y-r)
.lineTo(x,y+r)
.closePath()
.stroke();
plot.beginPath()
.moveTo(zxOffset+zr*0.5,zyOffset-zr*0.5)
.lineTo(zxOffset-zr, zyOffset + zr)
.closePath()
.stroke();
var r0 = 10;
//x轴箭头
plot.beginPath()
.moveTo(x+r- r0*Math.cos(Math.PI/3), y-r0*Math.sin(Math.PI/3))
.lineTo(x+r+r0*Math.sin(Math.PI/3), y)
.lineTo(x+r -r0*Math.cos(Math.PI/3), y+r0*Math.sin(Math.PI/3))
.closePath()
.fill()
plot.fillText("X", x+r, y-10, 20);
plot.fillText("Y", x+10, y-r+10, 20);
plot.fillText("Z", zxOffset-zr-25, zyOffset+zr+25, 20);
//y轴箭头
plot.beginPath()
.moveTo(x+ r0*Math.sin(Math.PI/3), y-r+r0*Math.cos(Math.PI/3))
.lineTo(x, y-r-r0*Math.sin(Math.PI/3))
.lineTo(x-r0*Math.sin(Math.PI/3), y-r+r0*Math.cos(Math.PI/3))
.closePath()
.fill()
//z轴箭头
plot.beginPath()
.moveTo(zxOffset -zr - r0*0.866*0.707,
zyOffset+zr-r0*0.866*0.707)
.lineTo(zxOffset-zr+r0*0.866*0.707, zyOffset+zr+r0*0.866*0.707)
.lineTo(zxOffset-zr -r0*1.5*0.707, zyOffset+zr+r0*1.5*0.707)
.closePath()
.fill()
plot.restore();
}
function myDraw() {
var config = new PlotConfiguration();
config.init();
config.setPreference();
config.setSector(1,1,1,1);
config.axis3D(0, 0, 0, 180);
config.axis3D(0, 0, 20, 180, 'red');
config.axis3D(-50, -80, 0, 180, 'blue');
/*
var r = 50;
var dx = r, dy = r;
for (var i = 0; i < 3; i++) {
for (var j = 2; j > 0; j--) {
drawCubic(i * dx, (j-2) * dy, r, 'red');
}
}
*/
}
/**
* @usage 绘制正方体
* @author mw
* @date 2016年02月01日 星期一 08:40:27
* @param
* @return
*
*/
this.drawCubic = function(x0, y0, z0, r, style) {
plot.save();
z0 = z0 /2;
x0 = x0 - z0*0.707;
y0 = y0 + z0*0.707;
z0 = 0;
plot.translate(x0 + r/2, y0 - r/2);
style = style ? style : 'black';
//左下角[x0, y0，边长r
shape.fillDraw(shape.nEdge(0, 0,0.707*r, 4, 0), style);
shape.fillDraw(shape.paraquad(-0.5*r, 0.5*r, 0, r, r/2, Math.PI/4), style);
shape.strokeDraw(shape.paraquad(-0.5*r, 0.5*r, 0, r, r/2, Math.PI/4), 'white');
shape.fillDraw(shape.paraquad(0.5*r, -0.5*r, Math.PI/4, r/2, r, Math.PI/4), style);
shape.strokeDraw(shape.paraquad(0.5*r, -0.5*r, Math.PI/4, r/2, r, Math.PI/4), 'white');
plot.restore();
}
function myDraw() {
var config = new PlotConfiguration();
config.init();
config.setPreference();
config.setSector(1,1,1,1);
config.axis3D(0, 0, 0, 180);
//x, y, z坐标序列
var x1, y1, z1;
//立方体序列
var cubic = new Array();
x1 = [0];
y1 = 0;
z1 = 0;
for (var i = 0; i < x1.length; i++) {
cubic.push([x1[i], y1, z1]);
}
x1 = [0, 1, 2];
y1 = 0;
z1 = 1;
for (var i = 0; i < x1.length; i++) {
cubic.push([x1[i], y1, z1]);
}
var r = 50;
for (var i = 0; i < cubic.length; i++) {
shape.drawCubic(cubic[i][0]*r, cubic[i][1]*r, cubic[i][2]*r, r, '#884422');
}
}
function myDraw() {
var config = new PlotConfiguration();
config.init();
config.setPreference();
config.setSector(1,1,1,1);
config.axis3D(0, 0, 0, 180);
//x, y, z坐标序列
var x1, y1, z1;
//立方体序列
var cubic = new Array();
x1 = [0];
y1 = 0;
z1 = 0;
for (var i = 0; i < x1.length; i++) {
cubic.push([x1[i], y1, z1]);
}
x1 = [0, 1, 2];
y1 = 0;
z1 = 1;
for (var i = 0; i < x1.length; i++) {
cubic.push([x1[i], y1, z1]);
}
var r = 50;
for (var i = 0; i < cubic.length; i++) {
shape.drawCubic(cubic[i][0]*r, cubic[i][1]*r, cubic[i][2]*r, r, '#884422');
}
var height = 400;
plot.setTransform(1, 0, 0, 1, 0, 0);
plot.fillText('左视图', 20, 20, 100);
plot.fillText('主视图', 20, 20+1*height/4, 100);
plot.fillText('俯视图', 20, 20+2*height/4, 100);
plot.setFillStyle('#884422')
.setStrokeStyle('white');
//左视图
config.setSector(4,3,1,1);
for (var i = 0; i < cubic.length; i++) {
//y, z两坐标，z坐标变为x坐标
shape.fillRect(cubic[i][2]*r, cubic[i][1]*r, r, r);
shape.strokeRect(cubic[i][2]*r, cubic[i][1]*r, r, r);
}
//主视图
config.setSector(4,3,2,1);
for (var i = 0; i < cubic.length; i++) {
//x, y两坐标
shape.fillRect(cubic[i][0]*r, cubic[i][1]*r, r, r);
shape.strokeRect(cubic[i][0]*r, cubic[i][1]*r, r, r);
}
//俯视图
config.setSector(4,3,3,1);
for (var i = 0; i < cubic.length; i++) {
//x, z两坐标，z坐标变为y坐标
shape.fillRect(cubic[i][0]*r, cubic[i][2]*r, r, r);
shape.strokeRect(cubic[i][0]*r, cubic[i][2]*r, r, r);
}
}
/**
* @usage 绘制正方体
* @author mw
* @date 2016年02月01日 星期一 08:40:27
* @param
* @return
*
*/
this.drawCubic = function(x0, y0, z0, r, style) {
plot.save();
y0 = -y0;
z0 = z0 /2;
x0 = x0 - z0*0.707;
y0 = y0 - z0*0.707;
z0 = 0;
plot.translate(x0 + r/2, y0 - r/2);
style = style ? style : 'black';
//左下角[x0, y0，边长r
shape.fillDraw(shape.nEdge(0, 0,0.707*r, 4, 0), style);
shape.fillDraw(shape.paraquad(-0.5*r, 0.5*r, 0, r, r/2, Math.PI/4), style);
shape.strokeDraw(shape.paraquad(-0.5*r, 0.5*r, 0, r, r/2, Math.PI/4), 'white');
shape.fillDraw(shape.paraquad(0.5*r, -0.5*r, Math.PI/4, r/2, r, Math.PI/4), style);
shape.strokeDraw(shape.paraquad(0.5*r, -0.5*r, Math.PI/4, r/2, r, Math.PI/4), 'white');
plot.restore();
}
function myDraw() {
var config = new PlotConfiguration();
config.init();
config.setPreference();
config.setSector(1,1,1,1);
config.axis3D(0, 0, 0, 180);
//x, y, z坐标序列
var x1, y1, z1;
//立方体序列
var cubic = new Array();
x1 = [0,1,2];
y1 = 0;
z1 = 0;
for (var i = 0; i < x1.length; i++) {
cubic.push([x1[i], y1, z1]);
}
x1 = [0];
y1 = 1;
z1 = 0;
for (var i = 0; i < x1.length; i++) {
cubic.push([x1[i], y1, z1]);
}
var r = 50;
var style = 'blue';
for (var i = 0; i < cubic.length; i++) {
shape.drawCubic(cubic[i][0]*r, cubic[i][1]*r, cubic[i][2]*r, r, style);
}
var height = 400;
r = r/2;
plot.setTransform(1, 0, 0, 1, 0, 0);
plot.fillText('左视图', 20, 20, 100);
plot.fillText('主视图', 20, 20+1*height/4, 100);
plot.fillText('俯视图', 20, 20+2*height/4, 100);
plot.setFillStyle(style)
.setStrokeStyle('white');
//左视图
config.setSector(4,3,1,1);
for (var i = 0; i < cubic.length; i++) {
//y, z两坐标，z坐标变为x坐标
shape.fillRect(cubic[i][2]*r, -cubic[i][1]*r, r, r);
shape.strokeRect(cubic[i][2]*r, -cubic[i][1]*r, r, r);
}
//主视图
config.setSector(4,3,2,1);
for (var i = 0; i < cubic.length; i++) {
//x, y两坐标
shape.fillRect(cubic[i][0]*r, -cubic[i][1]*r, r, r);
shape.strokeRect(cubic[i][0]*r, -cubic[i][1]*r, r, r);
}
//俯视图
config.setSector(4,3,3,1);
for (var i = 0; i < cubic.length; i++) {
//x, z两坐标，z坐标变为y坐标
shape.fillRect(cubic[i][0]*r, cubic[i][2]*r, r, r);
shape.strokeRect(cubic[i][0]*r, cubic[i][2]*r, r, r);
}
}
function myDraw() {
var config = new PlotConfiguration();
config.init();
config.setPreference();
config.setSector(1,1,1,1);
config.axis3D(0, 0, 0, 180);
//x, y, z坐标序列
var x1, y1, z1;
//立方体序列
var cubic = new Array();
x1 = 0;
y1 = 0;
z1 = 0;
for (var i = 0; i <1; i++) {
cubic.push([x1, y1, z1]);
}
x1 = 0;
y1 = [0,1,2];
z1 = 1;
for (var i = 0; i < y1.length; i++) {
cubic.push([x1, y1[i], z1]);
}
x1 = 0;
y1 = 0;
z1 = 2;
for (var i = 0; i < 1; i++) {
cubic.push([x1, y1, z1]);
}
var r = 50;
var style = '#ccaa00';
for (var i = 0; i < cubic.length; i++) {
shape.drawCubic(cubic[i][0]*r, -cubic[i][1]*r, cubic[i][2]*r, r, style);
}
var height = 400;
r = r/2;
plot.setTransform(1, 0, 0, 1, 0, 0);
plot.fillText('左视图', 20, 20, 100);
plot.fillText('主视图', 20, 20+1*height/3, 100);
plot.fillText('俯视图', 20, 20+2*height/3, 100);
plot.setFillStyle(style)
.setStrokeStyle('white');
//左视图
config.setSector(3,3,1,1);
for (var i = 0; i < cubic.length; i++) {
//y, z两坐标，z坐标变为x坐标
shape.fillRect(cubic[i][2]*r, -cubic[i][1]*r, r, r);
shape.strokeRect(cubic[i][2]*r, -cubic[i][1]*r, r, r);
}
//主视图
config.setSector(3,3,2,1);
for (var i = 0; i < cubic.length; i++) {
//x, y两坐标
shape.fillRect(cubic[i][0]*r, -cubic[i][1]*r, r, r);
shape.strokeRect(cubic[i][0]*r, -cubic[i][1]*r, r, r);
}
//俯视图
config.setSector(3,3,3,1);
for (var i = 0; i < cubic.length; i++) {
//x, z两坐标，z坐标变为y坐标
shape.fillRect(cubic[i][0]*r, cubic[i][2]*r, r, r);
shape.strokeRect(cubic[i][0]*r, cubic[i][2]*r, r, r);
}
}
function myDraw() {
var config = new PlotConfiguration();
config.init();
config.setPreference();
config.setSector(1,1,1,1);
config.axis3D(0, 0, 0, 180);
//x, y, z坐标序列
var x1, y1, z1;
//立方体序列
var cubic = new Array();
x1 = [0,1,2];
y1 = 0;
z1 = 0;
for (var i = 0; i <x1.length; i++) {
cubic.push([x1[i], y1, z1]);
}
x1 = [2];
y1 = 1;
z1 = 0;
for (var i = 0; i < x1.length; i++) {
cubic.push([x1[i], y1, z1]);
}
x1 = [2];
y1 = 2;
z1 = 0;
for (var i = 0; i < x1.length; i++) {
cubic.push([x1[i], y1, z1]);
}
var r = 50;
var style = '#ccaa00';
for (var i = 0; i < cubic.length; i++) {
shape.drawCubic(cubic[i][0]*r, -cubic[i][1]*r, cubic[i][2]*r, r, style);
}
var height = 400;
r = r/2;
plot.setTransform(1, 0, 0, 1, 0, 0);
plot.fillText('左视图', 20, 20, 100);
plot.fillText('主视图', 20, 20+1*height/3, 100);
plot.fillText('俯视图', 20, 20+2*height/3, 100);
plot.setFillStyle(style)
.setStrokeStyle('white');
//左视图
config.setSector(3,3,1,1);
for (var i = 0; i < cubic.length; i++) {
//y, z两坐标，z坐标变为x坐标
shape.fillRect(cubic[i][2]*r, -cubic[i][1]*r, r, r);
shape.strokeRect(cubic[i][2]*r, -cubic[i][1]*r, r, r);
}
//主视图
config.setSector(3,3,2,1);
for (var i = 0; i < cubic.length; i++) {
//x, y两坐标
shape.fillRect(cubic[i][0]*r, -cubic[i][1]*r, r, r);
shape.strokeRect(cubic[i][0]*r, -cubic[i][1]*r, r, r);
}
//俯视图
config.setSector(3,3,3,1);
for (var i = 0; i < cubic.length; i++) {
//x, z两坐标，z坐标变为y坐标
shape.fillRect(cubic[i][0]*r, cubic[i][2]*r, r, r);
shape.strokeRect(cubic[i][0]*r, cubic[i][2]*r, r, r);
}
}
//6 请把它摆出来
function myDraw() {
var config = new PlotConfiguration();
config.init();
config.setPreference();
config.setSector(1,1,1,1);
config.axis3D(0, 0, 0, 180);
//立方体，按从左向右(x递增)，从下向上(y递增)，从后向前(z递增)的顺序压入
var cubic = new Array();
//从前面看缺少的[x,y]
var notfront = [[0,1],[1,1],[3,1]];
//从上面看缺少的[x, z]
var nottop = [[0,1],[1,1]];
//从左面看缺少的[z,y]
var notleft = [[1,1]];
for (var z = 0; z < 2; z++) {
for (var y = 0; y < 2; y++) {
for (var x = 0; x < 4; x++) {
/*
if (elementInArray([x, y], notfront) ||
elementInArray([x, z], nottop) ||
elementInArray([z, y], notleft)) {
continue;
}*/
cubic.push([x,y,z]);
}
}
}
//三维图和三视图
var r = 50;
var style = '#ccaa00';
for (var i = 0; i < cubic.length; i++) {
shape.drawCubic(cubic[i][0]*r, cubic[i][1]*r, cubic[i][2]*r, r, style);
}
var height = 400;
r = r/2;
plot.setTransform(1, 0, 0, 1, 0, 0);
plot.fillText('左视图', 20, 20, 100);
plot.fillText('主视图', 20, 20+1*height/3, 100);
plot.fillText('俯视图', 20, 20+2*height/3, 100);
plot.setFillStyle(style)
.setStrokeStyle('white');
//左视图
config.setSector(3,3,1,1);
for (var i = 0; i < cubic.length; i++) {
//y, z两坐标，z坐标变为x坐标
shape.fillRect(cubic[i][2]*r, -cubic[i][1]*r, r, r);
shape.strokeRect(cubic[i][2]*r, -cubic[i][1]*r, r, r);
}
//主视图
config.setSector(3,3,2,1);
for (var i = 0; i < cubic.length; i++) {
//x, y两坐标
shape.fillRect(cubic[i][0]*r, -cubic[i][1]*r, r, r);
shape.strokeRect(cubic[i][0]*r, -cubic[i][1]*r, r, r);
}
//俯视图
config.setSector(3,3,3,1);
for (var i = 0; i < cubic.length; i++) {
//x, z两坐标，z坐标变为y坐标
shape.fillRect(cubic[i][0]*r, cubic[i][2]*r, r, r);
shape.strokeRect(cubic[i][0]*r, cubic[i][2]*r, r, r);
}
}
function elementInArray(x, array) {
var elem = new Array(x);
var elemLen = elem.length;
var a = new Array(array);
var len = a.length;
if (elemLen > 1) {
for (var i = 0; i < len; i++) {
for (var j = 0; j < elemLen; j++) {
if (a[i][j] != x[j]) {
break;
}
if (j >= elemLen-1) {
return true;
}
}
}
} else {
for (var i = 0; i < len; i++) {
if (a[i] == x) {
return true;
}
}
}
return false;
}
//6 请把它摆出来
function draw() {
var config = new PlotConfiguration();
config.init();
config.setPreference();
config.setSector(1,1,1,1);
config.axis3D(0, 0, 0, 180);
//立方体，按从左向右(x递增)，从下向上(y递增)，从后向前(z递增)的顺序压入
var cubic = new Array();
//从前面看缺少的[x,y]
var notfront = [[0,1],[1,1],[3,1]];
//从上面看缺少的[x, z]
var nottop = [[0,0],[1,0]];
//从左面看缺少的[z,y]
var notleft = [[1,1]];
for (var z = 0; z < 2; z++) {
for (var y = 0; y < 2; y++) {
for (var x = 0; x < 4; x++) {
if (elementInArray([x, y], notfront) ||
elementInArray([x, z], nottop) ||
elementInArray([z, y], notleft)) {
continue;
}
cubic.push([x,y,z]);
}
}
}
//三维图和三视图
var r = 50;
var style = '#ccaa00';
for (var i = 0; i < cubic.length; i++) {
shape.drawCubic(cubic[i][0]*r, -cubic[i][1]*r, cubic[i][2]*r, r, style);
}
var height = 400;
r = r/2;
plot.setTransform(1, 0, 0, 1, 0, 0);
plot.fillText('左视图', 20, 20, 100);
plot.fillText('主视图', 20, 20+1*height/3, 100);
plot.fillText('俯视图', 20, 20+2*height/3, 100);
plot.setFillStyle(style)
.setStrokeStyle('white');
//左视图
config.setSector(3,3,1,1);
for (var i = 0; i < cubic.length; i++) {
//y, z两坐标，z坐标变为x坐标
shape.fillRect(cubic[i][2]*r, -cubic[i][1]*r, r, r);
shape.strokeRect(cubic[i][2]*r, -cubic[i][1]*r, r, r);
}
//主视图
config.setSector(3,3,2,1);
for (var i = 0; i < cubic.length; i++) {
//x, y两坐标
shape.fillRect(cubic[i][0]*r, -cubic[i][1]*r, r, r);
shape.strokeRect(cubic[i][0]*r, -cubic[i][1]*r, r, r);
}
//俯视图
config.setSector(3,3,3,1);
for (var i = 0; i < cubic.length; i++) {
//x, z两坐标，z坐标变为y坐标
shape.fillRect(cubic[i][0]*r, cubic[i][2]*r, r, r);
shape.strokeRect(cubic[i][0]*r, cubic[i][2]*r, r, r);
}
}
function elementInArray(x, array) {
var elem = new Array(x);
var elemLen = elem[0].length;
var a = new Array();
a = array;
var len = a.length;
if (elemLen > 1) {
for (var i = 0; i < len; i++) {
var test = 1;
for (var j = 0; j < elemLen; j++) {
if (a[i][j] != elem[0][j]) {
test = 0;
}
if (test == 1 && j >= elemLen-1) {
return 1;
}
}
}
} else {
for (var i = 0; i < len; i++) {
if (a[i] == x) {
return 1;
}
}
}
return 0;
}
//7 有多少个立方体？
function draw() {
var config = new PlotConfiguration();
config.init();
config.setPreference();
config.setSector(1,1,1,1);
config.axis3D(0, 0, 0, 180);
//立方体，按从左向右(x递增)，从下向上(y递增)，从后向前(z递增)的顺序压入
var cubic = new Array();
for (var z = 0; z < 4; z++) {
for (var y = 3; y > -1; y--) {
for (var x = 0; x < 4; x++) {
if (x + z <= y)
cubic.push([x,4-y,z]);
}
}
}
//三维图和三视图
var r = 40;
var style = 'blue';
for (var i = 0; i < cubic.length; i++) {
shape.drawCubic(cubic[i][0]*r, 100-cubic[i][1]*r, cubic[i][2]*r, r, style);
}
var height = 400;
r = r/3;
plot.setTransform(1, 0, 0, 1, 0, 0);
plot.fillText('左视图', 20, 20, 100);
plot.fillText('主视图', 20, 20+1*height/3, 100);
plot.fillText('俯视图', 20, 20+2*height/3, 100);
plot.fillText('共有'+cubic.length.toFixed(0)+'个立方体组成。', 300,350,200);
plot.setFillStyle(style)
.setStrokeStyle('white');
//左视图
config.setSector(3,3,1,1);
for (var i = 0; i < cubic.length; i++) {
//y, z两坐标，z坐标变为x坐标
shape.fillRect(cubic[i][2]*r, -cubic[i][1]*r, r, r);
shape.strokeRect(cubic[i][2]*r, -cubic[i][1]*r, r, r);
}
//主视图
config.setSector(3,3,2,1);
for (var i = 0; i < cubic.length; i++) {
//x, y两坐标
shape.fillRect(cubic[i][0]*r, -cubic[i][1]*r, r, r);
shape.strokeRect(cubic[i][0]*r, -cubic[i][1]*r, r, r);
}
//俯视图
config.setSector(3,3,3,1);
for (var i = 0; i < cubic.length; i++) {
//x, z两坐标，z坐标变为y坐标
shape.fillRect(cubic[i][0]*r, cubic[i][2]*r, r, r);
shape.strokeRect(cubic[i][0]*r, cubic[i][2]*r, r, r);
}
}
</span>
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