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141 changes: 72 additions & 69 deletions src/backend/function-node.js
Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,75 @@ const acorn = require('acorn');
const { utils } = require('../utils');
const { FunctionTracer } = require('./function-tracer');

const mathProperties = [
'E',
'PI',
'SQRT2',
'SQRT1_2',
'LN2',
'LN10',
'LOG2E',
'LOG10E',
];

const mathFunctions = [
'abs',
'acos',
'acosh',
'asin',
'asinh',
'atan',
'atan2',
'atanh',
'cbrt',
'ceil',
'clz32',
'cos',
'cosh',
'expm1',
'exp',
'floor',
'fround',
'imul',
'log',
'log2',
'log10',
'log1p',
'max',
'min',
'pow',
'random',
'round',
'sign',
'sin',
'sinh',
'sqrt',
'tan',
'tanh',
'trunc',
];

const allowedExpressions = [
'value',
'value[]',
'value[][]',
'value[][][]',
'value[][][][]',
'value.value',
'value.thread.value',
'this.thread.value',
'this.output.value',
'this.constants.value',
'this.constants.value[]',
'this.constants.value[][]',
'this.constants.value[][][]',
'this.constants.value[][][][]',
'fn()[]',
'fn()[][]',
'fn()[][][]',
'[][]',
];

/**
*
* @desc Represents a single function, inside JS, webGL, or openGL.
Expand Down Expand Up @@ -592,61 +661,15 @@ class FunctionNode {
}

isAstMathVariable(ast) {
const mathProperties = [
'E',
'PI',
'SQRT2',
'SQRT1_2',
'LN2',
'LN10',
'LOG2E',
'LOG10E',
];
return ast.type === 'MemberExpression' &&
ast.object && ast.object.type === 'Identifier' &&
ast.object.name === 'Math' &&
ast.property &&
ast.property.type === 'Identifier' &&
mathProperties.indexOf(ast.property.name) > -1;
mathProperties.includes(ast.property.name);
}

isAstMathFunction(ast) {
const mathFunctions = [
'abs',
'acos',
'acosh',
'asin',
'asinh',
'atan',
'atan2',
'atanh',
'cbrt',
'ceil',
'clz32',
'cos',
'cosh',
'expm1',
'exp',
'floor',
'fround',
'imul',
'log',
'log2',
'log10',
'log1p',
'max',
'min',
'pow',
'random',
'round',
'sign',
'sin',
'sinh',
'sqrt',
'tan',
'tanh',
'trunc',
];
return ast.type === 'CallExpression' &&
ast.callee &&
ast.callee.type === 'MemberExpression' &&
Expand All @@ -655,7 +678,7 @@ class FunctionNode {
ast.callee.object.name === 'Math' &&
ast.callee.property &&
ast.callee.property.type === 'Identifier' &&
mathFunctions.indexOf(ast.callee.property.name) > -1;
mathFunctions.includes(ast.callee.property.name);
}

isAstVariable(ast) {
Expand Down Expand Up @@ -844,27 +867,7 @@ class FunctionNode {
return signatureString;
}

const allowedExpressions = [
'value',
'value[]',
'value[][]',
'value[][][]',
'value[][][][]',
'value.value',
'value.thread.value',
'this.thread.value',
'this.output.value',
'this.constants.value',
'this.constants.value[]',
'this.constants.value[][]',
'this.constants.value[][][]',
'this.constants.value[][][][]',
'fn()[]',
'fn()[][]',
'fn()[][][]',
'[][]',
];
if (allowedExpressions.indexOf(signatureString) > -1) {
if (allowedExpressions.includes(signatureString)) {
return signatureString;
}
return null;
Expand Down