Mercurial > sdl-ios-xcode
annotate docs/man3/SDL_UpdateRects.3 @ 872:e7be95d758e8
Date: Fri, 05 Mar 2004 16:08:01 +0000
From: Alan Swanson
Subject: Re: [SDL] Fatal signal when initiaize with USB joystick on 2.6.2 kern
On Fri, 2004-03-05 at 15:09, Sam Lantinga wrote:
> > Fred, how does the attached patch work for you? Do all your axes work?
>
> I think you meant the two lines to be reversed.
> I checked a more robust version of this into CVS. Fred, can you see if
> it works?
You've misread the code. :-/
For coef[0] and coef[1], it is (values[2]+values[1]) / 2 and then add
or subtract values[4] to the answer.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sat, 06 Mar 2004 02:58:06 +0000 |
parents | e5bc29de3f0a |
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1 .TH "SDL_UpdateRects" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" |
0 | 2 .SH "NAME" |
3 SDL_UpdateRects\- Makes sure the given list of rectangles is updated on the given screen\&. | |
4 .SH "SYNOPSIS" | |
5 .PP | |
6 \fB#include "SDL\&.h" | |
7 .sp | |
8 \fBvoid \fBSDL_UpdateRects\fP\fR(\fBSDL_Surface *screen, int numrects, SDL_Rect *rects\fR); | |
9 .SH "DESCRIPTION" | |
10 .PP | |
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11 Makes sure the given list of rectangles is updated on the given screen\&. The rectangles must all be confined within the screen boundaries (no clipping is done)\&. |
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12 .PP |
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13 This function should not be called while \fBscreen\fR is \fIlocked\fR\&. |
0 | 14 .PP |
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15 .RS |
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16 \fBNote: |
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17 .PP |
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18 It is adviced to call this function only once per frame, since each call has some processing overhead\&. This is no restriction since you can pass any number of rectangles each time\&. |
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19 .PP |
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20 The rectangles are not automatically merged or checked for overlap\&. In general, the programmer can use his knowledge about his particular rectangles to merge them in an efficient way, to avoid overdraw\&. |
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21 .RE |
0 | 22 .SH "SEE ALSO" |
23 .PP | |
24 \fI\fBSDL_UpdateRect\fP\fR, \fI\fBSDL_Rect\fR\fR, \fI\fBSDL_Surface\fR\fR, \fI\fBSDL_LockSurface\fP\fR | |
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25 ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01 |