NAME¶

SDL_GetRectAndLineIntersection - Calculate the intersection of a rectangle and line segment.

SYNOPSIS¶

#include <SDL3/SDL_rect.h>

bool SDL_GetRectAndLineIntersection(const SDL_Rect *rect, int *X1, int *Y1, int *X2, int *Y2);

DESCRIPTION¶

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.

FUNCTION PARAMETERS¶

rect

an SDL_Rect 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 true if there is an intersection, false otherwise.

AVAILABILITY¶

This function is available since SDL 3.2.0.