test2.txt

用VC做的一个简单编译器.实现简单的画图

--------------- 图形1：
color is red;
origin is (20, 200);									-- 设置原点的偏移量
rot is 0;												-- 不旋转
scale is (40, 40);										-- 设置比例
for T from 0 to 2*pi step pi/150 draw (t, -sin(t));		-- 画T的轨迹
origin is (20, 240);									-- 下移40单位
for T from 0 to 2*pi step pi/150 draw (t, -sin(t));		-- 画T的轨迹
origin is (20, 280);									-- 再下移40单位
for T from 0 to 2*pi step pi/150 draw (t, -sin(t));		-- 画T的轨迹


--------------- 图形2：
color is green;
origin is (380, 240);									-- 右移
scale is (80, 80/3);									-- y方向压缩为三分之一
rot is pi/2+0*pi/3 ;									-- 旋转初值设置
for T from -pi to pi step pi/150 draw (cos(t), sin(t));	-- 画T的轨迹
rot is pi/2+2*pi/3;										-- 旋转2/3*pi
for T from -pi to pi step pi/150 draw (cos(t), sin(t));	-- 画T的轨迹
rot is pi/2-2*pi/3;										-- 再旋转2/3*pi
for T from -pi to pi step pi/150 draw (cos(t), sin(t));	-- 画T的轨迹

--------------- 图形3：
color is blue;
origin is(580, 240);									-- 再右移
scale is (80, 80);										-- 恢复原比例
rot is 0;												-- 不旋转
for t from 0 to 2*pi step pi/150 draw(cos(t),sin(t));	-- 画T的轨迹
for t from 0 to Pi*20 step Pi/150 draw					-- 画T的轨迹
   ((1-1/(10/7))*Cos(T)+1/(10/7)*Cos(-T*((10/7)-1)), 
	(1-1/(10/7))*Sin(T)+1/(10/7)*Sin(-T*((10/7)-1)));