Android Open Source - splott Vm

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Back to project page splott.

License

The source code is released under:

MIT License

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Java Source Code

package com.wordsaretoys.splott.parser;
//from  w  w  w  . j  a v a 2s .  c  om
import com.wordsaretoys.splott.parser.Compiler.Step;

public class Vm {
  
  double[] locals;
  Step[] steps;
  int output;
  
  public Vm(Step[] s, int lc, int o) {
    steps = s;
    locals = new double[lc];
    output = o;
  }
  
  public double get(double x, double y, double z, double t) {
    locals[0] = x;
    locals[1] = y;
    locals[2] = z;
    locals[3] = t;
    for (int i = 0; i < steps.length; i++) {
      Step step = steps[i];
      switch (step.type) {

      case LoadConstant:
        locals[step.local0] = step.constant;
        break;
        
      case OpAdd:
        locals[step.local2] = locals[step.local0] + locals[step.local1];
        break;
        
      case OpSubtract:
        locals[step.local2] = locals[step.local0] - locals[step.local1];
        break;

      case OpMultiply:
        locals[step.local2] = locals[step.local0] * locals[step.local1];
        break;

      case OpDivide:
        locals[step.local2] = locals[step.local0] / locals[step.local1];
        break;

      case OpExponent:
        locals[step.local2] = Math.pow(locals[step.local0], locals[step.local1]);
        break;
        
      case OpUminus:
        locals[step.local1] = -locals[step.local0];
        break;
        
      case FuncSine:
        locals[step.local1] = Math.sin(locals[step.local0]);
        break;
      
      case FuncCosine:
        locals[step.local1] = Math.cos(locals[step.local0]);
        break;

      case FuncLogarithm:
        locals[step.local1] = Math.log(locals[step.local0]);
        break;
        
      case FuncExponential:
        locals[step.local1] = Math.exp(locals[step.local0]);
        break;
      }
    }
    return locals[output];
  }
  
}

Java Source Code List