<function name="DrawPoly" parent="surface" type="libraryfunc"> <description> Draws a textured polygon (secretly a triangle fan) with a maximum of 4096 vertices. Only works properly with convex polygons. You may try to render concave polygons, but there is no guarantee that things wont get messed up. Unlike most surface library functions, non-integer coordinates are not rounded. <warning>You must reset the drawing color and texture before calling the function to ensure consistent results. See examples below.</warning> <rendercontext hook="false" type="2D"></rendercontext> </description> <realm>Client and Menu</realm> <args> <arg name="vertices" type="table">A table containing integer vertices. See the <page>Structures/PolygonVertex</page>. **The vertices must be in clockwise order.**</arg> </args> </function> <example> <description>Draws a red triangle in the top left corner of the screen.</description> <code> local triangle = { { x = 100, y = 200 }, { x = 150, y = 100 }, { x = 200, y = 200 } } hook.Add("HUDPaint", "PolygonTest", function() surface.SetDrawColor( 255, 0, 0, 255 ) draw.NoTexture() surface.DrawPoly( triangle ) end ) </code> <output><image src="draw_poly.png"/></output> </example> <example> <description>Draws a red triangle in the top left corner of the screen.</description> <description>Draws a yellow polygon in the top left corner of the screen.</description> <code> local triangle = { { x = 100, y = 200 }, { x = 150, y = 100 }, { x = 200, y = 200 }, { x = 150, y = 300 }, { x = 100, y = 300 }, } hook.Add("HUDPaint", "PolygonExample", function() surface.SetDrawColor( 255, 255, 0, 255 ) draw.NoTexture() surface.DrawPoly( triangle ) end ) </code> <output><upload src="70c/8d8323cd4ef9932.png" size="48448" name="drawpoly_example.png" /></output> </example> <example> <description>A helper function to draw a circle using surface.DrawPoly.</description> <code> function draw.Circle( x, y, radius, seg ) local cir = {} table.insert( cir, { x = x, y = y, u = 0.5, v = 0.5 } ) for i = 0, seg do local a = math.rad( ( i / seg ) * -360 ) table.insert( cir, { x = x + math.sin( a ) * radius, y = y + math.cos( a ) * radius, u = math.sin( a ) / 2 + 0.5, v = math.cos( a ) / 2 + 0.5 } ) end local a = math.rad( 0 ) -- This is needed for non absolute segment counts table.insert( cir, { x = x + math.sin( a ) * radius, y = y + math.cos( a ) * radius, u = math.sin( a ) / 2 + 0.5, v = math.cos( a ) / 2 + 0.5 } ) surface.DrawPoly( cir ) end hook.Add("HUDPaint", "PolygonCircleTest", function() surface.SetDrawColor( 0, 0, 0, 200) draw.NoTexture() draw.Circle( ScrW() / 2, ScrH() / 2, 200, math.sin( CurTime() ) * 20 + 25 ) --Usage: --draw.Circle( x, y, radius, segments ) end ) </code> </example>