DrawLine affected by glPointSize

BlitzMax Forums/BlitzMax Programming/DrawLine affected by glPointSize

Odds On

(Posted 2007) [#1]

A while back, an optional parameter was added to the DrawLine command to draw the last pixel in the line. This last pixel is obviously being drawn with a Plot command, but as you can see in the example code below, this results in the last pixel being affected by glPointSize() when using the GLMax2DDriver().

I know it's not technically a bug, but something that had me stumped for a while until I remembered the 'draw_last_pixel' thing.

SetGraphicsDriver GLMax2DDriver()

Graphics 800, 600

While Not KeyHit( KEY_ESCAPE ) = True

	Cls
	
	glPointSize 5.0
	SetColor 255, 0, 0
	DrawLine 400, 300, 500, 400
	
	Flip

Wend
End

marksibly

(Posted 2007) [#2]

Hi,

There are many OpenGL calls you can make that will affect the operation of Max2D in GL mode like this.

The solution is simple: if you want to use GL while using Max2D, you *must* save and restore any GL state you modify.

ImaginaryHuman

(Posted 2007) [#3]

I presume also changing the line thickness would NOT change the thickness of the last pixel plotted.