Now, the example treasure pool happens to have treasure pools for all of its guaranteed and random rewards. For cases in which the Total Weight, which is the sum of all the weights in a sub-pool, is not 1, a reward's chance is calculated by dividing its weight by the total weight. Oftentimes, the weights of all the random rewards in a sub-pool add up to 1, allowing one to directly convert a reward's weight into a probability percentage. However, if the calling pool forbids item duplication, the same item or object cannot be chosen twice, resulting in rare items appearing more frequently than expected. Note that only one random reward in a sub-pool is chosen each time the sub-pool is called however, if the sub-pool is called more than once and the calling pool allows item duplication, it is possible for the same reward to be chosen more than once. In qualitative terms, this means that Tech Treasure x1 and Tech Treasure x2 are given at approximately equal rates, but Tech Treasure x3 is only given half as much as either Tech Treasure x1 or Tech Treasure x2. In the Hi-Tech Chest treasure pool, Tech Treasure x1 and Tech Treasure x2 both have a weight of 0.4 while Tech Treasure x3 has a weight of 0.2. If a particular reward has the biggest weight of all random rewards in a sub-pool, it will be picked most often when the sub-pool is called. The weight is the relative likelihood of that particular reward being given when its sub-pool is called. Tech Treasure is an example of a random reward - it can either be given once, twice, or three times when the 0 sub-pool is called.Įvery random reward in a given sub-pool of a treasure pool has a Weight assigned to it. Either the reward type or reward quantity can vary.
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