void drawPoints()
{
     ...
	    glEnableClientState(GL_VERTEX_ARRAY);
	    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
	    glVertexPointer(4, GL_DOUBLE, 4*sizeof(double), pos);
	    glTexCoordPointer(4, GL_DOUBLE, 4*sizeof(double), pos);

glVertexPointer

This is given the pos array, which should hold the vertices of all the drawn primitives.

glTexCoordPointer

This should be given an array of uv coordinates (typically described by 2 components rather than 4), 1 for each vertex passed to the GPU.

You're passing the "pos" array to both, I don't think you should be doing that.

Upon fixing that, look into VBOs - That's what it looks like you're trying to use. I use VBOs for drawing multiple polygons at once, it's pretty fast.

glVertexPointer

This is given the pos array, which should hold the vertices of all the drawn primitives.

glTexCoordPointer

This should be given an array of uv coordinates (typically described by 2 components rather than 4), 1 for each vertex passed to the GPU.

You're passing the "pos" array to both, I don't think you should be doing that.

Upon fixing that, look into display lists, VBOs or perhaps VAOs. I use VBOs for drawing multiple polygons at once, it's pretty fast.

glVertexPointer

This is given the pos array, which should hold the vertices of all the drawn primitives.

glTexCoordPointer

This should be given an array of uv coordinates (typically described by 2 components rather than 4)), 1 for each vertex passed to the GPU.

You're passing the pos array to both, I don't think you should be doing that.

Upon fixing that, look into display lists, VBOs or perhaps VAOs. I use VBOs for drawing multiple polygons at once, it's pretty fast.