# Skin Sprite Transform

Skin sprite transform provides simple yet powerful way for skin sprite to manipulate its own transform while rendering.

# Transform Expression

Each property output is computed based on its transform expression, which is the sum of all property inputs multiplied by corresponding coefficient.

Take the following example:

{
    "x1": {
        "x1": 0.1,
        "y2": 0.2,
        "x3": 0.3,
        "y4": 0.4
    }
}

It will be transformed with the following logic:

output.x1 = input.x1 * 0.1 + input.y2 * 0.2 + input.x3 * 0.3 + input.y4 * 0.4

# Inputs

# Identity Transform

The identity transform produces an output equals to the input, and can be used when transforming is not needed:

{
    "x1": { "x1": 1 },
    "y1": { "y1": 1 },
    "x2": { "x2": 1 },
    "y2": { "y2": 1 },
    "x3": { "x3": 1 },
    "y3": { "y3": 1 },
    "x4": { "x4": 1 },
    "y4": { "y4": 1 }
}