DxDrawLine: Difference between revisions

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m (Cleaned the example up a bit.)
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local colGreen = tocolor ( 0, 255, 0, 255 )    -- Get green color.
local colGreen = tocolor ( 0, 255, 0, 255 )    -- Get green color.


function create2DLine ( )
function draw2DLine( )
   dxDrawLine ( centerX, centerY - 200, centerX, centerY - 170, colGreen, 1 )              -- Draw vertical crosshair line
   dxDrawLine ( centerX, centerY - 200, centerX, centerY - 170, colGreen, 1 )              -- Draw vertical crosshair line
   dxDrawLine ( centerY - 20, centerY - 185, centerX + 20, centerY - 185, colGreen, 1 )    -- Draw horizontal crosshair line
   dxDrawLine ( centerY - 20, centerY - 185, centerX + 20, centerY - 185, colGreen, 1 )    -- Draw horizontal crosshair line
end   
end   
 
addEventHandler ( "onClientResourceStart", resourceRoot, draw2DLine)
 
function HandleTheRendering ( )
  addEventHandler ( "onClientRender", root, create2DLine)  -- Keep the line visible with onClientRender event.
end
 
addEventHandler ( "onClientResourceStart", resourceRoot, HandleTheRendering )
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Revision as of 04:25, 22 January 2012

This function draws a 2D line across the screen - rendered for one frame. This should be used in conjunction with onClientRender in order to display continuously.

Syntax

bool dxDrawLine ( int startX, int startY, int endX, int endY, int color, [float width=1, bool postGUI=false] )

Required Arguments

  • startX: An integer representing the absolute start X position of the line, represented by pixels on the screen.
  • startY: An integer representing the absolute start Y position of the line, represented by pixels on the screen.
  • endX: An integer representing the absolute end X position of the line, represented by pixels on the screen.
  • endY: An integer representing the absolute end Y position of the line, represented by pixels on the screen.
  • color: An integer of the hex color, produced using tocolor or 0xAARRGGBB (AA = alpha, RR = red, GG = green, BB = blue).

Optional Arguments

NOTE: When using optional arguments, you might need to supply all arguments before the one you wish to use. For more information on optional arguments, see optional arguments.

  • width: The width/thickness of the line
  • postGUI: A bool representing whether the line should be drawn on top of or behind any ingame GUI (rendered by CEGUI).

Returns

Returns a true if the operation was successful, false otherwise.

Example

Click to collapse [-]
Client

Example code for drawing crosshair for Tank. 

local width, height = guiGetScreenSize ( )     -- Get player's screen resolution (width and height).
local centerX, centerY = ( width / 2 ), ( height / 2 )  -- Get x and y co-ordinates of the center of the screen.
local colGreen = tocolor ( 0, 255, 0, 255 )    -- Get green color.

function draw2DLine( )
   dxDrawLine ( centerX, centerY - 200, centerX, centerY - 170, colGreen, 1 )              -- Draw vertical crosshair line
   dxDrawLine ( centerY - 20, centerY - 185, centerX + 20, centerY - 185, colGreen, 1 )    -- Draw horizontal crosshair line
end  
addEventHandler ( "onClientResourceStart", resourceRoot, draw2DLine)

See Also


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