Quadrilateral

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These are functions used to convert coordinates between quadrilaterals:

Function	Meaning
lcQuadCreate	Creates quadrilateral object
lcQuadDelete	Deletes quadrilateral object
lcQuadSet	Defines vertices of quadrilateral
lcQuadTransXYtoUV	Converts XY coordinates into UV coordinates
lcQuadTransUVtoXY	Converts UV coordinates into XY coordinates
lcQuadContains	Determines whether quadrilateral contains a specified point