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| ||'''rect'''||a pointer to the rectangle of type [[SDL_Rect]] to be compared|| ||'''X1'''||a pointer to the starting X-coordinate of the line to be compared|| ||'''Y1'''||a pointer to the starting Y-coordinate of the line to be compared|| ||'''X2'''||a pointer to the ending X-coordinate of the line to be compared|| ||'''Y2'''||a pointer to the ending Y-coordinate of the line to be compared|| |
||'''rect'''||the [[SDL_Rect]] to be compared|| ||'''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|| |
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| ''You can add useful comments here'' | This function is used to clip a line segment to a rectangle. The end points are modified from the starting coordinates ('''X1''', '''Y1''', '''X2''', and '''Y2''') to reflect any clipping that occurs. 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 passed to '''X1''', '''Y1''', '''X2''', and/or '''Y2''' as necessary. |
SDL_IntersectRectAndLine
Use this function to calculate the intersection of a rectangle and line segment.
Contents
Syntax
SDL_bool SDL_IntersectRectAndLine(const SDL_Rect* rect,
int* X1,
int* Y1,
int* X2,
int* Y2)
Function Parameters
rect |
the SDL_Rect to be compared |
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.
Code Examples
You can add your code example here
Remarks
This function is used to clip a line segment to a rectangle. The end points are modified from the starting coordinates (X1, Y1, X2, and Y2) to reflect any clipping that occurs. 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 passed to X1, Y1, X2, and/or Y2 as necessary.
