147 lines
No EOL
3.1 KiB
JavaScript
147 lines
No EOL
3.1 KiB
JavaScript
jvm.NumericScale = function(scale, normalizeFunction, minValue, maxValue) {
|
|
this.scale = [];
|
|
|
|
normalizeFunction = normalizeFunction || 'linear';
|
|
|
|
if (scale) this.setScale(scale);
|
|
if (normalizeFunction) this.setNormalizeFunction(normalizeFunction);
|
|
if (minValue) this.setMin(minValue);
|
|
if (maxValue) this.setMax(maxValue);
|
|
};
|
|
|
|
jvm.NumericScale.prototype = {
|
|
setMin: function(min) {
|
|
this.clearMinValue = min;
|
|
if (typeof this.normalize === 'function') {
|
|
this.minValue = this.normalize(min);
|
|
} else {
|
|
this.minValue = min;
|
|
}
|
|
},
|
|
|
|
setMax: function(max) {
|
|
this.clearMaxValue = max;
|
|
if (typeof this.normalize === 'function') {
|
|
this.maxValue = this.normalize(max);
|
|
} else {
|
|
this.maxValue = max;
|
|
}
|
|
},
|
|
|
|
setScale: function(scale) {
|
|
var i;
|
|
|
|
for (i = 0; i < scale.length; i++) {
|
|
this.scale[i] = [scale[i]];
|
|
}
|
|
},
|
|
|
|
setNormalizeFunction: function(f) {
|
|
if (f === 'polynomial') {
|
|
this.normalize = function(value) {
|
|
return Math.pow(value, 0.2);
|
|
}
|
|
} else if (f === 'linear') {
|
|
delete this.normalize;
|
|
} else {
|
|
this.normalize = f;
|
|
}
|
|
this.setMin(this.clearMinValue);
|
|
this.setMax(this.clearMaxValue);
|
|
},
|
|
|
|
getValue: function(value) {
|
|
var lengthes = [],
|
|
fullLength = 0,
|
|
l,
|
|
i = 0,
|
|
c;
|
|
|
|
if (typeof this.normalize === 'function') {
|
|
value = this.normalize(value);
|
|
}
|
|
for (i = 0; i < this.scale.length-1; i++) {
|
|
l = this.vectorLength(this.vectorSubtract(this.scale[i+1], this.scale[i]));
|
|
lengthes.push(l);
|
|
fullLength += l;
|
|
}
|
|
|
|
c = (this.maxValue - this.minValue) / fullLength;
|
|
for (i=0; i<lengthes.length; i++) {
|
|
lengthes[i] *= c;
|
|
}
|
|
|
|
i = 0;
|
|
value -= this.minValue;
|
|
while (value - lengthes[i] >= 0) {
|
|
value -= lengthes[i];
|
|
i++;
|
|
}
|
|
|
|
if (i == this.scale.length - 1) {
|
|
value = this.vectorToNum(this.scale[i])
|
|
} else {
|
|
value = (
|
|
this.vectorToNum(
|
|
this.vectorAdd(this.scale[i],
|
|
this.vectorMult(
|
|
this.vectorSubtract(this.scale[i+1], this.scale[i]),
|
|
(value) / (lengthes[i])
|
|
)
|
|
)
|
|
)
|
|
);
|
|
}
|
|
|
|
return value;
|
|
},
|
|
|
|
vectorToNum: function(vector) {
|
|
var num = 0,
|
|
i;
|
|
|
|
for (i = 0; i < vector.length; i++) {
|
|
num += Math.round(vector[i])*Math.pow(256, vector.length-i-1);
|
|
}
|
|
return num;
|
|
},
|
|
|
|
vectorSubtract: function(vector1, vector2) {
|
|
var vector = [],
|
|
i;
|
|
|
|
for (i = 0; i < vector1.length; i++) {
|
|
vector[i] = vector1[i] - vector2[i];
|
|
}
|
|
return vector;
|
|
},
|
|
|
|
vectorAdd: function(vector1, vector2) {
|
|
var vector = [],
|
|
i;
|
|
|
|
for (i = 0; i < vector1.length; i++) {
|
|
vector[i] = vector1[i] + vector2[i];
|
|
}
|
|
return vector;
|
|
},
|
|
|
|
vectorMult: function(vector, num) {
|
|
var result = [],
|
|
i;
|
|
|
|
for (i = 0; i < vector.length; i++) {
|
|
result[i] = vector[i] * num;
|
|
}
|
|
return result;
|
|
},
|
|
|
|
vectorLength: function(vector) {
|
|
var result = 0,
|
|
i;
|
|
for (i = 0; i < vector.length; i++) {
|
|
result += vector[i] * vector[i];
|
|
}
|
|
return Math.sqrt(result);
|
|
}
|
|
}; |