Qopengl materials

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Where to find materials about Qopengl?
Does Qopengl perform as well as glew?
Cant manage to find way to draw lines, google has not much to offer.

tryed:
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glLineWidth(5);
glColor3f( 1.0f, 1.0f, 1.0f);

// Draw a triangle:
glBegin(GL_TRIANGLES); // Lower left vertex
glVertex3f(-1.0f, -0.5f, -4.0f); // Lower right vertex
glVertex3f( 10000.0f, -0.5f, -4.0f); // Upper vertex
glVertex3f( 0.0f, 0.5f, -4.0f); glEnd();

glBegin(GL_LINE_STRIP);
glVertex2f(0.1f,2.0f);// eelmine
glVertex2f(-0.5f, -1.0f);
glEnd();
@

SGaist

Hi and welcome to devnet,

Are you looking for something like "this":http://doc.qt.io/qt-5/qtgui-openglwindow-example.html ?

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[quote author="SGaist" date="1424469193"]Hi and welcome to devnet,

Are you looking for something like "this":http://doc.qt.io/qt-5/qtgui-openglwindow-example.html ?[/quote]

Tested code into that example replacing part that draws traingle with code above but it wont work this way

SGaist

It wasn't meant to be just copy/replace. The example shows how to do it (the triangle part) using a recent version of OpenGL. You are using the old fixed pipeline with your functions calls.

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Thanks for your knowledge, will look into newer opengl documentation.