SVG linearGradient coordinates calculation

How can I calculate coordinates (x1,y1,x2,y2) values for linearGradient SVG element with different angles?. Need to achieve rotation of gradient开发者_运维百科.

Any help much appreciated,

Thanks SHAN

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You can use gradientTransform="rotate(angle [cx cy])" or you can calculate the angle you want and tweak the gradient vector (x1,y1)->(x2,y2).