scratch-vm/src/blocks/scratch3_operators.js

165 lines
4.8 KiB
JavaScript
Raw Normal View History

function Scratch3OperatorsBlocks(runtime) {
/**
* The runtime instantiating this block package.
* @type {Runtime}
*/
this.runtime = runtime;
}
/**
* Retrieve the block primitives implemented by this package.
* @return {Object.<string, Function>} Mapping of opcode to Function.
*/
Scratch3OperatorsBlocks.prototype.getPrimitives = function() {
return {
'math_number': this.number,
'math_positive_number': this.number,
'math_whole_number': this.number,
'math_angle': this.number,
2016-06-10 10:36:05 -04:00
'text': this.text,
'operator_add': this.add,
2016-06-20 14:42:06 -04:00
'operator_subtract': this.subtract,
'operator_multiply': this.multiply,
'operator_divide': this.divide,
'operator_lt': this.lt,
'operator_equals': this.equals,
2016-06-20 14:42:06 -04:00
'operator_gt': this.gt,
'operator_and': this.and,
'operator_or': this.or,
2016-06-20 14:42:56 -04:00
'operator_not': this.not,
2016-08-11 12:05:58 -04:00
'operator_random': this.random,
'operator_join': this.join,
'operator_letter_of': this.letterOf,
'operator_length': this.length,
'operator_mod': this.mod,
'operator_round': this.round,
'operator_mathop_menu': this.mathopMenu,
'operator_mathop': this.mathop
};
};
2016-06-10 10:36:05 -04:00
Scratch3OperatorsBlocks.prototype.number = function (args) {
var num = Number(args.NUM);
if (num !== num) {
// NaN
return 0;
}
return num;
};
2016-06-10 10:36:05 -04:00
Scratch3OperatorsBlocks.prototype.text = function (args) {
return String(args.TEXT);
};
Scratch3OperatorsBlocks.prototype.add = function (args) {
return args.NUM1 + args.NUM2;
};
2016-06-20 14:42:06 -04:00
Scratch3OperatorsBlocks.prototype.subtract = function (args) {
return args.NUM1 - args.NUM2;
};
Scratch3OperatorsBlocks.prototype.multiply = function (args) {
return args.NUM1 * args.NUM2;
};
Scratch3OperatorsBlocks.prototype.divide = function (args) {
return args.NUM1 / args.NUM2;
};
Scratch3OperatorsBlocks.prototype.lt = function (args) {
return Boolean(args.OPERAND1 < args.OPERAND2);
2016-06-20 14:42:06 -04:00
};
2016-06-10 10:36:05 -04:00
Scratch3OperatorsBlocks.prototype.equals = function (args) {
return Boolean(args.OPERAND1 == args.OPERAND2);
2016-06-10 10:36:05 -04:00
};
2016-06-20 14:42:06 -04:00
Scratch3OperatorsBlocks.prototype.gt = function (args) {
return Boolean(args.OPERAND1 > args.OPERAND2);
2016-06-20 14:42:06 -04:00
};
Scratch3OperatorsBlocks.prototype.and = function (args) {
return Boolean(args.OPERAND1 && args.OPERAND2);
2016-06-20 14:42:06 -04:00
};
Scratch3OperatorsBlocks.prototype.or = function (args) {
return Boolean(args.OPERAND1 || args.OPERAND2);
2016-06-20 14:42:06 -04:00
};
Scratch3OperatorsBlocks.prototype.not = function (args) {
return Boolean(!args.OPERAND);
2016-06-20 14:42:06 -04:00
};
Scratch3OperatorsBlocks.prototype.random = function (args) {
2016-06-30 19:04:15 -04:00
var low = args.FROM <= args.TO ? args.FROM : args.TO;
var high = args.FROM <= args.TO ? args.TO : args.FROM;
if (low == high) return low;
// If both low and high are ints, truncate the result to an int.
var lowInt = low == parseInt(low);
var highInt = high == parseInt(high);
if (lowInt && highInt) {
return low + parseInt(Math.random() * ((high + 1) - low));
}
return (Math.random() * (high - low)) + low;
};
2016-08-11 12:05:58 -04:00
Scratch3OperatorsBlocks.prototype.join = function (args) {
return String(String(args.STRING1) + String(args.STRING2));
};
Scratch3OperatorsBlocks.prototype.letterOf = function (args) {
var index = Number(args.LETTER) - 1;
var str = String(args.STRING);
// Out of bounds?
if (index < 0 || index >= str.length) {
return '';
}
return str.charAt(index);
};
Scratch3OperatorsBlocks.prototype.length = function (args) {
return String(args.STRING).length;
};
Scratch3OperatorsBlocks.prototype.mod = function (args) {
var n = Number(args.NUM1);
var modulus = Number(args.NUM2);
var result = n % modulus;
// Scratch mod is kept positive.
if (result / modulus < 0) result += modulus;
return result;
};
Scratch3OperatorsBlocks.prototype.round = function (args) {
return Math.round(Number(args.NUM));
};
Scratch3OperatorsBlocks.prototype.mathopMenu = function (args) {
return args.OPERATOR;
};
Scratch3OperatorsBlocks.prototype.mathop = function (args) {
var operator = String(args.OPERATOR).toLowerCase();
var n = Number(args.NUM);
switch (operator) {
case 'abs': return Math.abs(n);
case 'floor': return Math.floor(n);
case 'ceiling': return Math.ceil(n);
case 'sqrt': return Math.sqrt(n);
case 'sin': return Math.sin((Math.PI * n) / 180);
case 'cos': return Math.cos((Math.PI * n) / 180);
case 'tan': return Math.tan((Math.PI * n) / 180);
case 'asin': return (Math.asin(n) * 180) / Math.PI;
case 'acos': return (Math.acos(n) * 180) / Math.PI;
case 'atan': return (Math.atan(n) * 180) / Math.PI;
case 'ln': return Math.log(n);
case 'log': return Math.log(n) / Math.LN10;
case 'e ^': return Math.exp(n);
case '10 ^': return Math.pow(10, n);
}
return 0;
};
module.exports = Scratch3OperatorsBlocks;