DrawArrays() GL_QUAD_STRIP, alpha value is ignored ???

Hello

in the past I used the alpha value to set the transparence of a color:

gl2.glEnable(GL.GL_BLEND); // Turn Blending On
// set the color red, green, blue , alpha
gl2.glColor4f( color[1], color[2], color[3], color[0] );

this worked well

Now I changed my code and use vbo´s and DrawArrays(..) and it look like the alpha value is ignored.
Do I have to set something special when I create the ColorPointer ?
Thanks

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   static void vboTestOnlyDrawSeveralQuadStrip(GL2 gl2){
      
      gl2.glEnable(GL.GL_BLEND); // Turn Blending On
      
      //--- turn shade Model Flat On
      // eaxh quad is filled with one color defined by the last vertex
      gl2.glShadeModel(GL2.GL_FLAT);
      
       for(int i=0; i<vboIndexArray.length/2; i++){
          // define which Types of Elements are a allowed
          gl2.glEnableClientState( GL2.GL_VERTEX_ARRAY );
          gl2.glEnableClientState( GL2.GL_COLOR_ARRAY );
       
          //--- set the vertex pointer
          // bind the buffer, from this moment this specific buffer is used
          gl2.glBindBuffer(GL2.GL_ARRAY_BUFFER, vboIndexArray[i]);
          // Get the Position of the data in the memory
          gl2.glVertexPointer(3, GL2.GL_FLOAT, 0, 0);
          
          //--- set the color pointer
             // bind the buffer, from this moment this specific buffer is used
          gl2.glBindBuffer(GL2.GL_ARRAY_BUFFER, vboIndexArray[i+(vboIndexArray.length/2)]);
          gl2.glColorPointer(4, GL2.GL_FLOAT, 0, 0);
                  
          // draw the Buffer
          gl2.glDrawArrays(GL2.GL_QUAD_STRIP, 0,((intCountOfQuads * 2) + 2));       
       
          // unbind the buffer, by using 0
          gl2.glBindBuffer(GL2.GL_ARRAY_BUFFER, 0);       
       
          // Disable vertex arrays
          gl2.glDisableClientState( GL2.GL_COLOR_ARRAY );
          gl2.glDisableClientState( GL2.GL_VERTEX_ARRAY );      
       }
      
   }//end: void vboTestOnlyDrawSeveralQuadStrip(

		DrawArrays() GL_QUAD_STRIP, alpha value is ignored ??? (Read 942 times)
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