SDL Wiki

SDL_IntersectFRectAndLine

Calculate the intersection of a rectangle and line segment with float precision.

Syntax

SDL_bool SDL_IntersectFRectAndLine(const SDL_FRect *
                                   rect, float *X1,
                                   float *Y1, float *X2,
                                   float *Y2);

Function Parameters

rect

an SDL_FRect structure representing the rectangle to intersect

X1

a pointer to the starting X-coordinate of the line

Y1

a pointer to the starting Y-coordinate of the line

X2

a pointer to the ending X-coordinate of the line

Y2

a pointer to the ending Y-coordinate of the line

Return Value

Returns SDL_TRUE if there is an intersection, SDL_FALSE otherwise.

Remarks

This function is used to clip a line segment to a rectangle. A line segment contained entirely within the rectangle or that does not intersect will remain unchanged. A line segment that crosses the rectangle at either or both ends will be clipped to the boundary of the rectangle and the new coordinates saved in X1, Y1, X2, and/or Y2 as necessary.

Version

This function is available since SDL 2.0.22.


CategoryAPI


[ edit | delete | history | feedback | raw ]

[ front page | index | search | recent changes | git repo | offline html ]

All wiki content is licensed under Creative Commons Attribution 4.0 International (CC BY 4.0).
Wiki powered by ghwikipp.