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| hud_coordinate_system [2017/04/18 16:31] – korshun | hud_coordinate_system [2017/04/18 16:35] – korshun |
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| ====== HUD coordinate system ====== | ====== HUD coordinate system ====== |
| ZDoom uses a special coordinate system for [[zdoom>HudMessage]]s. In 4:3 resolutions, the coordinate system's rectangle matches that of the screen. In aspect ratios other than that, a 4:3 rectangle is put at the center of the screen and the remaining screen space is out of its boundaries. | ZDoom uses a special coordinate system for [[zdoom>HudMessage]]s. In 4:3 resolutions, the coordinate system's rectangle matches that of the screen. In aspect ratios other than that, a 4:3 rectangle is put at the center of the screen and the remaining screen space is out of its boundaries. |
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| | The HUD coordinate system's rectangle width and height are specified in [[zdoom>SetHudSize]]. |
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| ACSUtils provides functions to correctly work with the HUD coordinate system. | ACSUtils provides functions to correctly work with the HUD coordinate system. |
| [[functions:GetAspectRatio]] returns the aspect ratio that ZDoom assumes the screen is. ZDoom uses tricky code for that. | [[functions:GetAspectRatio]] returns the aspect ratio that ZDoom assumes the screen is. ZDoom uses tricky code for that. |
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| | ===== Actual screen boundaries ===== |
| | [[functions:HudLeftFor]], [[functions:HudRightFor]], [[functions:HudTopFor]] and [[functions:HudBottomFor]] return actual screen boundaries in the HUD coordinate system for the specified width and height of the HUD coordinate system, taking the current aspect ratio into account. |
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| | To avoid specifying a width or height every time, you can call [[functions:HudSetVirtualSize]] once and then call [[functions:HudLeft]], [[functions:HudRight]], [[functions:HudTop]] and [[functions:HudBottom]]. |
