annotate R/rdyncall/demo/blink.R @ 63:9b6cdffd30dd

- further fixes of inccorect overflow errors for int (and long on LLP64 systems) * prev commit had bugs * added overflow tests for also int, long, long long (for both, lp64 and llp64) - while at it, fixing a reference leak when not using python with utf8 caching
author Tassilo Philipp
date Sun, 19 May 2024 15:33:18 +0200
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children
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1 # Package: rdyncall
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2 # File: demo/blink.R
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3 # Description: Simple SDL,OpenGL demonstration - a blinking screen
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4
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5 dynport(SDL)
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6 dynport(GL)
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7
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8 blink <- 0
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9 surface <- NULL
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10
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11 init <- function()
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12 {
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13 SDL_Init(SDL_INIT_VIDEO)
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14 surface <<- SDL_SetVideoMode(640,480,32,SDL_OPENGL+SDL_DOUBLEBUF)
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15 blink <<- 0
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16 }
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17
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18
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19 update <- function()
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20 {
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21 glFinish()
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22 glClearColor(0,0,blink,0)
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23 glClear(GL_COLOR_BUFFER_BIT)
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24 SDL_GL_SwapBuffers()
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25 glFlush()
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26 blink <<- ( blink + 0.01 ) %% 1
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27 }
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28
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29 input <- function()
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30 {
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31 return(TRUE)
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32 }
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33
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34 checkGL <- function()
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35 {
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36 glerror <- glGetError()
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37 if (glerror != 0)
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38 {
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39 cat("GL Error", glerror, "\n")
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40 }
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41 return(glerror == 0)
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42 }
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43
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44 mainloop <- function()
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45 {
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46 sdlevent <- new.struct("SDL_Event")
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47 quit <- FALSE
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48 while(!quit)
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49 {
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50 update()
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51 while( SDL_PollEvent(sdlevent) )
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52 {
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53 if (sdlevent$type == SDL_QUIT ) {
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54 quit <- TRUE
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55 } else if (sdlevent$type == SDL_MOUSEBUTTONDOWN) {
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56 cat("button ", sdlevent$button$button ,"\n")
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57 }
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58 }
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59 if ( !checkGL() ) quit <- TRUE
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60 }
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61 }
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62
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63 quit <- function()
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64 {
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65 SDL_Quit()
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66 }
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67
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68 run <- function()
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69 {
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70 init()
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71 mainloop()
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72 quit()
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73 }
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74
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75 run()