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77 ><H1 |
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79 NAME="TIME" |
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80 ></A |
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81 >Chapter 13. Time</H1 |
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82 ><DIV |
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83 CLASS="TOC" |
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84 ><DL |
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85 ><DT |
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86 ><B |
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87 >Table of Contents</B |
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88 ></DT |
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89 ><DT |
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90 ><A |
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91 HREF="sdlgetticks.html" |
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92 >SDL_GetTicks</A |
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93 > -- Get the number of milliseconds since the SDL library initialization.</DT |
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94 ><DT |
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95 ><A |
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96 HREF="sdldelay.html" |
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97 >SDL_Delay</A |
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98 > -- Wait a specified number of milliseconds before returning.</DT |
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99 ><DT |
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100 ><A |
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101 HREF="sdladdtimer.html" |
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102 >SDL_AddTimer</A |
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103 > -- Add a timer which will call a callback after the specified number of milliseconds has |
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104 elapsed.</DT |
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105 ><DT |
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106 ><A |
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107 HREF="sdlremovetimer.html" |
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108 >SDL_RemoveTimer</A |
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109 > -- Remove a timer which was added with |
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110 <A |
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111 HREF="sdladdtimer.html" |
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112 >SDL_AddTimer</A |
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113 >.</DT |
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114 ><DT |
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115 ><A |
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116 HREF="sdlsettimer.html" |
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117 >SDL_SetTimer</A |
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118 > -- Set a callback to run after the specified number of milliseconds has |
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119 elapsed.</DT |
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120 ></DL |
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121 ></DIV |
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122 ><P |
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123 >SDL provides several cross-platform functions for dealing with time. |
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124 It provides a way to get the current time, a way to wait a little while, |
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125 and a simple timer mechanism. These functions give you two ways of moving an |
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126 object every x milliseconds: |
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127 |
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128 <P |
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129 ></P |
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130 ><UL |
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131 ><LI |
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132 ><P |
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133 >Use a timer callback function. This may have the bad effect that it runs in a seperate thread or uses alarm signals, but it's easier to implement.</P |
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134 ></LI |
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135 ><LI |
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136 ><P |
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137 >Or you can get the number of milliseconds passed, and move the object if, for example, 30 ms passed.</P |
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138 ></LI |
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140 > </P |
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186 >SDL_CondWaitTimeout</TD |
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