mirror of
https://github.com/google/blockly.git
synced 2026-01-05 08:00:09 +01:00
New initial commit with .svn directories and their contents ignored.
This commit is contained in:
ellen.spertus
371
generators/python/math.js
Normal file
371
generators/python/math.js
Normal file
@@ -0,0 +1,371 @@
|
||||
/**
|
||||
* Visual Blocks Language
|
||||
*
|
||||
* Copyright 2012 Google Inc.
|
||||
* http://blockly.googlecode.com/
|
||||
*
|
||||
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||
* you may not use this file except in compliance with the License.
|
||||
* You may obtain a copy of the License at
|
||||
*
|
||||
* http://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing, software
|
||||
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
* See the License for the specific language governing permissions and
|
||||
* limitations under the License.
|
||||
*/
|
||||
|
||||
/**
|
||||
* @fileoverview Generating Python for math blocks.
|
||||
* @author q.neutron@gmail.com (Quynh Neutron)
|
||||
*/
|
||||
'use strict';
|
||||
|
||||
goog.provide('Blockly.Python.math');
|
||||
|
||||
goog.require('Blockly.Python');
|
||||
|
||||
|
||||
// If any new block imports any library, add that library name here.
|
||||
Blockly.Python.addReservedWords('math,random');
|
||||
|
||||
Blockly.Python['math_number'] = function(block) {
|
||||
// Numeric value.
|
||||
var code = parseFloat(block.getTitleValue('NUM'));
|
||||
var order = code < 0 ? Blockly.Python.ORDER_UNARY_SIGN :
|
||||
Blockly.Python.ORDER_ATOMIC;
|
||||
return [code, order];
|
||||
};
|
||||
|
||||
Blockly.Python['math_arithmetic'] = function(block) {
|
||||
// Basic arithmetic operators, and power.
|
||||
var OPERATORS = {
|
||||
ADD: [' + ', Blockly.Python.ORDER_ADDITIVE],
|
||||
MINUS: [' - ', Blockly.Python.ORDER_ADDITIVE],
|
||||
MULTIPLY: [' * ', Blockly.Python.ORDER_MULTIPLICATIVE],
|
||||
DIVIDE: [' / ', Blockly.Python.ORDER_MULTIPLICATIVE],
|
||||
POWER: [' ** ', Blockly.Python.ORDER_EXPONENTIATION]
|
||||
};
|
||||
var tuple = OPERATORS[block.getTitleValue('OP')];
|
||||
var operator = tuple[0];
|
||||
var order = tuple[1];
|
||||
var argument0 = Blockly.Python.valueToCode(block, 'A', order) || '0';
|
||||
var argument1 = Blockly.Python.valueToCode(block, 'B', order) || '0';
|
||||
var code = argument0 + operator + argument1;
|
||||
return [code, order];
|
||||
// In case of 'DIVIDE', division between integers returns different results
|
||||
// in Python 2 and 3. However, is not an issue since Blockly does not
|
||||
// guarantee identical results in all languages. To do otherwise would
|
||||
// require every operator to be wrapped in a function call. This would kill
|
||||
// legibility of the generated code. See:
|
||||
// http://code.google.com/p/blockly/wiki/Language
|
||||
};
|
||||
|
||||
Blockly.Python['math_single'] = function(block) {
|
||||
// Math operators with single operand.
|
||||
var operator = block.getTitleValue('OP');
|
||||
var code;
|
||||
var arg;
|
||||
if (operator == 'NEG') {
|
||||
// Negation is a special case given its different operator precedence.
|
||||
var code = Blockly.Python.valueToCode(block, 'NUM',
|
||||
Blockly.Python.ORDER_UNARY_SIGN) || '0';
|
||||
return ['-' + code, Blockly.Python.ORDER_UNARY_SIGN];
|
||||
}
|
||||
Blockly.Python.definitions_['import_math'] = 'import math';
|
||||
if (operator == 'SIN' || operator == 'COS' || operator == 'TAN') {
|
||||
arg = Blockly.Python.valueToCode(block, 'NUM',
|
||||
Blockly.Python.ORDER_MULTIPLICATIVE) || '0';
|
||||
} else {
|
||||
arg = Blockly.Python.valueToCode(block, 'NUM',
|
||||
Blockly.Python.ORDER_NONE) || '0';
|
||||
}
|
||||
// First, handle cases which generate values that don't need parentheses
|
||||
// wrapping the code.
|
||||
switch (operator) {
|
||||
case 'ABS':
|
||||
code = 'math.fabs(' + arg + ')';
|
||||
break;
|
||||
case 'ROOT':
|
||||
code = 'math.sqrt(' + arg + ')';
|
||||
break;
|
||||
case 'LN':
|
||||
code = 'math.log(' + arg + ')';
|
||||
break;
|
||||
case 'LOG10':
|
||||
code = 'math.log10(' + arg + ')';
|
||||
break;
|
||||
case 'EXP':
|
||||
code = 'math.exp(' + arg + ')';
|
||||
break;
|
||||
case 'POW10':
|
||||
code = 'math.pow(10,' + arg + ')';
|
||||
break;
|
||||
case 'ROUND':
|
||||
code = 'round(' + arg + ')';
|
||||
break;
|
||||
case 'ROUNDUP':
|
||||
code = 'math.ceil(' + arg + ')';
|
||||
break;
|
||||
case 'ROUNDDOWN':
|
||||
code = 'math.floor(' + arg + ')';
|
||||
break;
|
||||
case 'SIN':
|
||||
code = 'math.sin(' + arg + ' / 180.0 * math.pi)';
|
||||
break;
|
||||
case 'COS':
|
||||
code = 'math.cos(' + arg + ' / 180.0 * math.pi)';
|
||||
break;
|
||||
case 'TAN':
|
||||
code = 'math.tan(' + arg + ' / 180.0 * math.pi)';
|
||||
break;
|
||||
}
|
||||
if (code) {
|
||||
return [code, Blockly.Python.ORDER_FUNCTION_CALL];
|
||||
}
|
||||
// Second, handle cases which generate values that may need parentheses
|
||||
// wrapping the code.
|
||||
switch (operator) {
|
||||
case 'ASIN':
|
||||
code = 'math.asin(' + arg + ') / math.pi * 180';
|
||||
break;
|
||||
case 'ACOS':
|
||||
code = 'math.acos(' + arg + ') / math.pi * 180';
|
||||
break;
|
||||
case 'ATAN':
|
||||
code = 'math.atan(' + arg + ') / math.pi * 180';
|
||||
break;
|
||||
default:
|
||||
throw 'Unknown math operator: ' + operator;
|
||||
}
|
||||
return [code, Blockly.Python.ORDER_MULTIPLICATIVE];
|
||||
};
|
||||
|
||||
Blockly.Python['math_constant'] = function(block) {
|
||||
// Constants: PI, E, the Golden Ratio, sqrt(2), 1/sqrt(2), INFINITY.
|
||||
var CONSTANTS = {
|
||||
PI: ['math.pi', Blockly.Python.ORDER_MEMBER],
|
||||
E: ['math.e', Blockly.Python.ORDER_MEMBER],
|
||||
GOLDEN_RATIO: ['(1 + math.sqrt(5)) / 2', Blockly.Python.ORDER_MULTIPLICATIVE],
|
||||
SQRT2: ['math.sqrt(2)', Blockly.Python.ORDER_MEMBER],
|
||||
SQRT1_2: ['math.sqrt(1.0 / 2)', Blockly.Python.ORDER_MEMBER],
|
||||
INFINITY: ['float(\'inf\')', Blockly.Python.ORDER_ATOMIC]
|
||||
};
|
||||
var constant = block.getTitleValue('CONSTANT');
|
||||
if (constant != 'INFINITY') {
|
||||
Blockly.Python.definitions_['import_math'] = 'import math';
|
||||
}
|
||||
return CONSTANTS[constant];
|
||||
};
|
||||
|
||||
Blockly.Python['math_number_property'] = function(block) {
|
||||
// Check if a number is even, odd, prime, whole, positive, or negative
|
||||
// or if it is divisible by certain number. Returns true or false.
|
||||
var number_to_check = Blockly.Python.valueToCode(block, 'NUMBER_TO_CHECK',
|
||||
Blockly.Python.ORDER_MULTIPLICATIVE) || '0';
|
||||
var dropdown_property = block.getTitleValue('PROPERTY');
|
||||
var code;
|
||||
if (dropdown_property == 'PRIME') {
|
||||
Blockly.Python.definitions_['import_math'] = 'import math';
|
||||
var functionName = Blockly.Python.provideFunction_(
|
||||
'isPrime',
|
||||
['def ' + Blockly.Python.FUNCTION_NAME_PLACEHOLDER_ + '(n):',
|
||||
' # http://en.wikipedia.org/wiki/Primality_test#Naive_methods',
|
||||
' # If n is not a number but a string, try parsing it.',
|
||||
' if type(n) not in (int, float, long):',
|
||||
' try:',
|
||||
' n = float(n)',
|
||||
' except:',
|
||||
' return False',
|
||||
' if n == 2 or n == 3:',
|
||||
' return True',
|
||||
' # False if n is negative, is 1, or not whole,' +
|
||||
' or if n is divisible by 2 or 3.',
|
||||
' if n <= 1 or n % 1 != 0 or n % 2 == 0 or n % 3 == 0:',
|
||||
' return False',
|
||||
' # Check all the numbers of form 6k +/- 1, up to sqrt(n).',
|
||||
' for x in range(6, int(math.sqrt(n)) + 2, 6):',
|
||||
' if n % (x - 1) == 0 or n % (x + 1) == 0:',
|
||||
' return False',
|
||||
' return True']);
|
||||
code = functionName + '(' + number_to_check + ')';
|
||||
return [code, Blockly.Python.ORDER_FUNCTION_CALL];
|
||||
}
|
||||
switch (dropdown_property) {
|
||||
case 'EVEN':
|
||||
code = number_to_check + ' % 2 == 0';
|
||||
break;
|
||||
case 'ODD':
|
||||
code = number_to_check + ' % 2 == 1';
|
||||
break;
|
||||
case 'WHOLE':
|
||||
code = number_to_check + ' % 1 == 0';
|
||||
break;
|
||||
case 'POSITIVE':
|
||||
code = number_to_check + ' > 0';
|
||||
break;
|
||||
case 'NEGATIVE':
|
||||
code = number_to_check + ' < 0';
|
||||
break;
|
||||
case 'DIVISIBLE_BY':
|
||||
var divisor = Blockly.Python.valueToCode(block, 'DIVISOR',
|
||||
Blockly.Python.ORDER_MULTIPLICATIVE);
|
||||
// If 'divisor' is some code that evals to 0, Python will raise an error.
|
||||
if (!divisor || divisor == '0') {
|
||||
return ['False', Blockly.Python.ORDER_ATOMIC];
|
||||
}
|
||||
code = number_to_check + ' % ' + divisor + ' == 0';
|
||||
break;
|
||||
}
|
||||
return [code, Blockly.Python.ORDER_RELATIONAL];
|
||||
};
|
||||
|
||||
Blockly.Python['math_change'] = function(block) {
|
||||
// Add to a variable in place.
|
||||
var argument0 = Blockly.Python.valueToCode(block, 'DELTA',
|
||||
Blockly.Python.ORDER_ADDITIVE) || '0';
|
||||
var varName = Blockly.Python.variableDB_.getName(block.getTitleValue('VAR'),
|
||||
Blockly.Variables.NAME_TYPE);
|
||||
return varName + ' = (' + varName + ' if type(' + varName +
|
||||
') in (int, float, long) else 0) + ' + argument0 + '\n';
|
||||
};
|
||||
|
||||
// Rounding functions have a single operand.
|
||||
Blockly.Python['math_round'] = Blockly.Python['math_single'];
|
||||
// Trigonometry functions have a single operand.
|
||||
Blockly.Python['math_trig'] = Blockly.Python['math_single'];
|
||||
|
||||
Blockly.Python['math_on_list'] = function(block) {
|
||||
// Math functions for lists.
|
||||
var func = block.getTitleValue('OP');
|
||||
var list = Blockly.Python.valueToCode(block, 'LIST',
|
||||
Blockly.Python.ORDER_NONE) || '[]';
|
||||
var code;
|
||||
switch (func) {
|
||||
case 'SUM':
|
||||
code = 'sum(' + list + ')';
|
||||
break;
|
||||
case 'MIN':
|
||||
code = 'min(' + list + ')';
|
||||
break;
|
||||
case 'MAX':
|
||||
code = 'max(' + list + ')';
|
||||
break;
|
||||
case 'AVERAGE':
|
||||
var functionName = Blockly.Python.provideFunction_(
|
||||
'math_mean',
|
||||
// This operation excludes null and values that are not int or float:',
|
||||
// math_mean([null, null, "aString", 1, 9]) == 5.0.',
|
||||
['def ' + Blockly.Python.FUNCTION_NAME_PLACEHOLDER_ + '(myList):',
|
||||
' localList = [e for e in myList if type(e) in (int, float, long)]',
|
||||
' if not localList: return',
|
||||
' return float(sum(localList)) / len(localList)']);
|
||||
code = functionName + '(' + list + ')';
|
||||
break;
|
||||
case 'MEDIAN':
|
||||
var functionName = Blockly.Python.provideFunction_(
|
||||
'math_median',
|
||||
// This operation excludes null values:
|
||||
// math_median([null, null, 1, 3]) == 2.0.
|
||||
['def ' + Blockly.Python.FUNCTION_NAME_PLACEHOLDER_ + '(myList):',
|
||||
' localList = sorted([e for e in myList ' +
|
||||
'if type(e) in (int, float, long)])',
|
||||
' if not localList: return',
|
||||
' if len(localList) % 2 == 0:',
|
||||
' return (localList[len(localList) / 2 - 1] + ' +
|
||||
'localList[len(localList) / 2]) / 2.0',
|
||||
' else:',
|
||||
' return localList[(len(localList) - 1) / 2]']);
|
||||
code = functionName + '(' + list + ')';
|
||||
break;
|
||||
case 'MODE':
|
||||
var functionName = Blockly.Python.provideFunction_(
|
||||
'math_modes',
|
||||
// As a list of numbers can contain more than one mode,
|
||||
// the returned result is provided as an array.
|
||||
// Mode of [3, 'x', 'x', 1, 1, 2, '3'] -> ['x', 1].
|
||||
['def ' + Blockly.Python.FUNCTION_NAME_PLACEHOLDER_ + '(some_list):',
|
||||
' modes = []',
|
||||
' # Using a lists of [item, count] to keep count rather than dict',
|
||||
' # to avoid "unhashable" errors when the counted item is ' +
|
||||
'itself a list or dict.',
|
||||
' counts = []',
|
||||
' maxCount = 1',
|
||||
' for item in some_list:',
|
||||
' found = False',
|
||||
' for count in counts:',
|
||||
' if count[0] == item:',
|
||||
' count[1] += 1',
|
||||
' maxCount = max(maxCount, count[1])',
|
||||
' found = True',
|
||||
' if not found:',
|
||||
' counts.append([item, 1])',
|
||||
' for counted_item, item_count in counts:',
|
||||
' if item_count == maxCount:',
|
||||
' modes.append(counted_item)',
|
||||
' return modes']);
|
||||
code = functionName + '(' + list + ')';
|
||||
break;
|
||||
case 'STD_DEV':
|
||||
Blockly.Python.definitions_['import_math'] = 'import math';
|
||||
var functionName = Blockly.Python.provideFunction_(
|
||||
'math_standard_deviation',
|
||||
['def ' + Blockly.Python.FUNCTION_NAME_PLACEHOLDER_ + '(numbers):',
|
||||
' n = len(numbers)',
|
||||
' if n == 0: return',
|
||||
' mean = float(sum(numbers)) / n',
|
||||
' variance = sum((x - mean) ** 2 for x in numbers) / n',
|
||||
' return math.sqrt(variance)']);
|
||||
code = functionName + '(' + list + ')';
|
||||
break;
|
||||
case 'RANDOM':
|
||||
Blockly.Python.definitions_['import_random'] = 'import random';
|
||||
code = 'random.choice(' + list + ')';
|
||||
break;
|
||||
default:
|
||||
throw 'Unknown operator: ' + func;
|
||||
}
|
||||
return [code, Blockly.Python.ORDER_FUNCTION_CALL];
|
||||
};
|
||||
|
||||
Blockly.Python['math_modulo'] = function(block) {
|
||||
// Remainder computation.
|
||||
var argument0 = Blockly.Python.valueToCode(block, 'DIVIDEND',
|
||||
Blockly.Python.ORDER_MULTIPLICATIVE) || '0';
|
||||
var argument1 = Blockly.Python.valueToCode(block, 'DIVISOR',
|
||||
Blockly.Python.ORDER_MULTIPLICATIVE) || '0';
|
||||
var code = argument0 + ' % ' + argument1;
|
||||
return [code, Blockly.Python.ORDER_MULTIPLICATIVE];
|
||||
};
|
||||
|
||||
Blockly.Python['math_constrain'] = function(block) {
|
||||
// Constrain a number between two limits.
|
||||
var argument0 = Blockly.Python.valueToCode(block, 'VALUE',
|
||||
Blockly.Python.ORDER_NONE) || '0';
|
||||
var argument1 = Blockly.Python.valueToCode(block, 'LOW',
|
||||
Blockly.Python.ORDER_NONE) || '0';
|
||||
var argument2 = Blockly.Python.valueToCode(block, 'HIGH',
|
||||
Blockly.Python.ORDER_NONE) || 'float(\'inf\')';
|
||||
var code = 'min(max(' + argument0 + ', ' + argument1 + '), ' +
|
||||
argument2 + ')';
|
||||
return [code, Blockly.Python.ORDER_FUNCTION_CALL];
|
||||
};
|
||||
|
||||
Blockly.Python['math_random_int'] = function(block) {
|
||||
// Random integer between [X] and [Y].
|
||||
Blockly.Python.definitions_['import_random'] = 'import random';
|
||||
var argument0 = Blockly.Python.valueToCode(block, 'FROM',
|
||||
Blockly.Python.ORDER_NONE) || '0';
|
||||
var argument1 = Blockly.Python.valueToCode(block, 'TO',
|
||||
Blockly.Python.ORDER_NONE) || '0';
|
||||
var code = 'random.randint(' + argument0 + ', ' + argument1 + ')';
|
||||
return [code, Blockly.Python.ORDER_FUNCTION_CALL];
|
||||
};
|
||||
|
||||
Blockly.Python['math_random_float'] = function(block) {
|
||||
// Random fraction between 0 and 1.
|
||||
Blockly.Python.definitions_['import_random'] = 'import random';
|
||||
return ['random.random()', Blockly.Python.ORDER_FUNCTION_CALL];
|
||||
};
|
||||
Reference in New Issue
Block a user