problem in using glcolorpointer in vertexarray

Hi

I am using vertexarray to show some videodata ,
when i use glcolorpointer to show the color i am not getting proper color.

 I am attaching code for reference.

float videovertexarray[5000000];
float videocolorarray[500000000];
int indexcolor=0;
int m1;
float vertices1,vertices2;
int vvertex=0;

for(int cpi=0;cpi<400;cpi++)
{
for(m1=0;m1<5000;m1++)
{
vertices1=(0.000252m1)sin(cpivalue0.0157);
vertices2=(0.000252m1)cos(cpivalue0.0157 );
videovertexarray[(vvertex2)+0]=vertices1;
videovertexarray[(vvertex2)+1]=vertices2;
videocolorarray[(indexcolor4)+0]=0.0f;
videocolorarray[(indexcolor4)+1]=1.0f;
videocolorarray[(indexcolor4)+2]=0.0f;
videocolorarray[(indexcolor4)+3]=0.0f;
indexcolor++;
vvertex++;
}
}

                glEnable(GL_BLEND);
                glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
                glEnableClientState(GL_COLOR_ARRAY);
                glEnableClientState(GL_VERTEX_ARRAY);
                glColorPointer(4, GL_FLOAT,0,videocolorarray);
                glVertexPointer(2, GL_FLOAT,0,videovertexarray);
                glDrawArrays(GL_POINTS,0,vvertex);
                glDisableClientState(GL_VERTEX_ARRAY);
                glDisableClientState(GL_COLOR_ARRAY);
                glDisable(GL_BLEND);

When i run this code i am not getting green color, i am getting black color.

                Thank you
                                          Janani

I do not understand what you are trying to draw there… some sort of gigantic circular point cloud?

Maybe you should provide alpha = 1.0 for your colors, not 0.0 when you enable blending with that blendfunc…?

glDisable( GL_LIGHTING ) ?

I will be getting data which will give green intensity so i will be filling green color position dynamically with that value.

currently for reference i am filling it with 1.0, i have tried filling alpha value with 1.0 but i am not getting proper color

Thank You