void DrawNode::setLineWidth(float lineWidth) supports only thickness between 1...7 (and setLineWidth(x) draws a "linewidth x-1" about axmol

[aismann]

...add least on debug modus but im not sure this is a windows only (angle) problem.

a tester snippet like this hepls to show the line thickness is growing:
int startX = 0;
for (size_t i = 0; i < 12; i++)
{
startX = i*10;
auto lineDrawNode = DrawNode::create();
this->addChild(lineDrawNode, 10);
lineDrawNode->setLineWidth(i);
lineDrawNode->drawLine(Vec2(startX, 100 ), Vec2(startX + 10, 100), Color4F::ORANGE);
}

on windows is grows only between x=0...8 => line width==x-1 (and 0 ==1)

[halx99]

Switch to OpenGL can check this different behavior

[aismann]

Switch to OpenGL can check this different behavior

How?

[halx99]

Modify the macro CC_USE_GLES_ON_DESKTOP to 0 at cocos/platform/CCPlatformConfig.h

[aismann]

#define CC_USE_GLES_ON_DESKTOP 1 => it has no thickness.
#define CC_USE_GLES_ON_DESKTOP 0 => shows the behavior as I has written above

[halx99]

Does the official v3 works well?

[aismann]

3.17.2 on windows shows the behavior as I has written above (only 0 is different=> 0 ==7pixel)

[halx99]

the line width at least 1px, see:

void CommandBufferGL::setLineWidth(float lineWidth)
{
    if(lineWidth > 0.0f)
        glLineWidth(lineWidth);
    else
        glLineWidth(1.0f);
    
}

[aismann]

Yes, that's correct it is on line 606 on CommandBufferGL.cpp.
That's the reason why a setLineWidth(0) has a thickness of 1 on engine-x
On 3.17.2 isn't this line anywhere.

[aismann]

I have found the reason of supported thickness 1-7 points:

GLint range[2];
glGetIntegerv(GL_ALIASED_LINE_WIDTH_RANGE, range);

returning 1,7
so it is clear that's my system only drawing a thickness between 1-7

Maybe it should be part of the documentation:

It is a good idea to add an info output on CCConfiguration.cpp too.

[aismann]

Here are more info for the documentation:
On my system (another system maybe having another min/max) :
CC_USE_GLES_ON_DESKTOP 1 has a supported min/max width of 1/1
CC_USE_GLES_ON_DESKTOP 0 has n supported min/max width of 1/7

[halx99]

seems google's angle renderer doesn't support non-1 line width.