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  1. Qt for Python
  2. PYSIDE-988

PySide2 : setAttributeArray of QOpenGLShaderProgram does not have effect

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    • Windows
    •  f42fe9365ba04e31aa8adb7d6d3942990b80104d (pyside-setup/5.12, 15.4.2019, 5.12.3)

       

      In the following code, it was found that setAttributeArray has no effect and because of that, glDrawArrays is caught for exception. See attached python.3.trace for more details. 

       

      values=(
       1,-1,
       1,-1,
      -1,1,
       1,1)
np_values = np.array(values)
stride  = 2

#This has no effect
self.program.setAttributeArray(0, GL_FLOAT, np_values, len(values), stride)   

self.program.setUniformValue( "t", self.t )

glf.glViewport(0, 0, self.viewportSize.width(), self.viewportSize.height());

glf.glDisable(GL_DEPTH_TEST)                
glf.glClearColor( 0.0, 0.0, 0.0, 1.0 )
glf.glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
glf.glEnable(GL_BLEND)
glf.glBlendFunc(GL_SRC_ALPHA, GL_ONE)

# Because setAttributeArray fails to set values, this fails. 
glf.glDrawArrays(GL_TRIANGLE_STRIP, 0, 4 )

       

       

        1. pyside988.zip
          8 kB
        2. Pyside-988-sample.zip
          4 kB
        3. python.3.trace
          93 kB
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            kleint Friedemann Kleint
            nagrohn Nahomi Gröhn (Inactive)
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              Created:
              Updated:
              Resolved:

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