《2022年Halcon编程语法 .pdf》由会员分享，可在线阅读，更多相关《2022年Halcon编程语法 .pdf（4页珍藏版）》请在taowenge.com淘文阁网|工程机械CAD图纸|机械工程制图|CAD装配图下载|SolidWorks_CaTia_CAD_UG_PROE_设计图分享下载上搜索。
1、输入控制参数可以是表达式，但图形参数、输出参数均应为变量；String 类型变量由单引号 括起来；此外还有一些特殊字符；Boolean 型变量包括true ( = 1 )、 false ( = 0 ) ；不为零的整数将被认为true ；但绝大多数的 Halcon 函数接受字符串型的表达：true false ，而非逻辑型表达；函数返回常量用于标识错误：? H_MSG_TRUE no error 2 ? H_MSG_FALSE logical false 3 ? H_MSG_FAIL operator did not succeed 5 可以放在try catch endtry块中，也可以用 d
2、ev_error_var() 与 dev_set_check() 来捕获；控制语句结构： （与一般语言略有不同，它们也有输入输出变量）? if . endif / if . else . endif / if . elseif . else . endif ? for . endfor ? while . endwhile ? repeat . until 此外，也有关键字break 、continue 、return 、exit 、stop 用来控制语句的执行；赋值语句在Halcon 中也被当作函数来使用：标准赋值? assign(Expression, ResultVariable) /编
3、辑形式，永远都是输入在前，输出在后? ResultVariable := Expression /代码形式元组插入赋值? insert(Tuple, NewValue, Index, Tuple) /编辑形式? TupleIndex := NewValue /代码形式控制变量元组操作? t,t concatenation of tuples ? |t| number of elements ? t selection of an element ? ti:j selection of a part of a tuple ? subset(t1,t2) selection from t1 by
4、indices in t2 图形元组操作对应函数? gen_empty_obj () ? |t| count_obj (p, num) ? t1,t2 concat_obj (p1, p2, q) ? t select_obj (p, q, i+1) ? ti:j copy_obj (p, q, i+1, j-i+1) ? subset(t1,t2) select_obj (p, q, t2+1) 元组的数学运算，如： A * B，令 m = |A|, n = |B|；若 m、n 不相等，且都大于 1，则错误；否则返回三种情况：? m=n=1 ，返回一个值；? m=n1 ，返回一个包含 m 个
5、数的元组，值为两元组各对于值的操作结果；? m1,n=1 ，返回一个包含 m 个数的元组，值为第二个数与第一元组各值的操作结果；Halcon 的数学运算算术运算? a / a division ? a % a rest of the integer division 名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 1 页，共 4 页 - - - - - - - - - ? a * a multiplication ? v + v addition and concatenation
6、of strings ? a - a subtraction ? -a negation 位运算? lsh(i,i) left shift ? rsh(i,i) right shift ? i band i bit-wise and ? i bor i bit-wise or ? i bxor i bit-wise xor ? bnot i bit-wise complement 字符串操作? v$s conversion to string /字符串的格式化，有很丰富的参数? v + v concatenation of strings and addition ? strchr(s,s)
7、search character in string ? strstr(s,s) search substring ? strrchr(s,s) search character in string (reverse) ? strrstr(s,s) search substring (reverse) ? strlen(s) length of string ? si selection of one character ? si:i selection of substring ? split(s,s) splitting to substrings 比较操作符? t t greater t
8、han ? t = t greater or equal ? t = t equal ? t # t not equal 逻辑操作符? not l negation ? l and l logical and ? l or l logical or ? l xor l logical xor 数学函数? sin(a) sine of a ? cos(a) cosine of a ? tan(a) tangent of a ? asin(a) arc sine of a in the interval -p/2, p/ 2, a ? -1, 1 ? acos(a) arc cosine a in
9、 the interval -p/2, p/2, a ? -1, 1 ? atan(a) arc tangent a in the interval -p/2, p/2, a ? -1, 1 ? atan2(a,b) arc tangent a/b in the interval -p, p ? sinh(a) hyperbolic sine of a ? cosh(a) hyperbolic cosine of a 名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 2 页，共 4 页
10、 - - - - - - - - - ? tanh(a) hyperbolic tangent of a ? exp(a) exponential function ? log(a) natural logarithm, a 0 ? log10(a) decade logarithm, a 0 ? pow(a1,a2) power ? ldexp(a1,a2) a1 pow(2,a2) 其他操作（统计、随机数、符号函数等）? min(t) minimum value of the tuple ? max(t) maximum value of the tuple ? min2(t1,t2) e
11、lement-wise minimum of two tuples ? max2(t1,t2) element-wise maximum of two tuples ? find(t1,t2) indices of all occurrences of t1 within t2 ? rand(i) create random values from 0.1 (number specified by i) ? sgn(a) element-wise sign of a tuple ? sum(t) sum of all elements or string concatenation ? cum
12、ul(t) cumulative histogram of a tuple ? mean(a) mean value ? deviation(a) standard deviation ? sqrt(a) square root of a ? deg(a) convert radians to degrees ? rad(a) convert degrees to radians ? real(a) convert integer to real ? int(a) convert a real to integer ? round(a) convert real to integer 四舍五入
13、? number(v) convert string to a number ? is_number(v) test if value is a number ? abs(a) absolute value of a (integer or real) ? fabs(a) absolute value of a (always real) ? ceil(a) smallest integer value not smaller than a ? floor(a) largest integer value not greater than a ? fmod(a1,a2) fractional
14、part of a1/a2, with the same sign as a1 ? sort(t) sorting in increasing order ? uniq(t) eliminate duplicates of neighboring values (typically used in combination with sort) ? sort_index(t) return index instead of values ? median(t) Median value of a tuple (numbers) ? select_rank(t,v) Select the elem
15、ent (number) with the given rank ? inverse(t) reverse the order of the values ? subset(t1,t2) selection from t1 by indices in t2 ? remove(t1,t2) Remove of values with the given indices ? environment(s) value of an environment variable ? ord(a) ASCII number of a character ? chr(a) convert an ASCII nu
16、mber to a character ? ords(s) ASCII number of a tuple of strings 名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 3 页，共 4 页 - - - - - - - - - ? chrt(i) convert a tuple of integers into a string名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 4 页，共 4 页 - - - - - - - - -