So I have made paint app. And I want to fix one problem with my brush stroke. When I paint with mouse slowly - everything is ok. When I do it faster, there are some spacings. Its because not all mouse coordinates are registered then. But how can I fix it? Is there ant solution? I'm using vertex array with mouse locations. Here's code:

Code :
    int count = [vertices count] * 2;
    int sum = [vertices count];
//    NSLog(@"count: %d", count);
    int currIndex = 0;
    GLfloat *GLVertices = (GLfloat *)malloc(count * sizeof(GLfloat));
    for (NSValue *locationValue in vertices) {
        CGPoint loc = locationValue.pointValue;
        GLVertices[currIndex++] = loc.x;
        GLVertices[currIndex++] = loc.y;    
    }
 
    glEnableClientState(GL_VERTEX_ARRAY);
    glEnable(GL_BLEND);
    glBlendFuncSeparate(GL_ZERO, GL_ONE, GL_SRC_COLOR, GL_ZERO);
    glEnable(GL_TEXTURE_2D);
    glBindTexture(GL_TEXTURE_2D, brushTexture);
    glPointSize(50);
    glHint(GL_POINT_SMOOTH_HINT, GL_NICEST);
    glEnable(GL_POINT_SMOOTH);
    glVertexPointer(2, GL_FLOAT, 0, GLVertices);
    glDrawArrays(GL_POINTS, 0, sum);
    glDisable(GL_POINT_SMOOTH);
    glDisable(GL_BLEND);
    glDisableClientState(GL_VERTEX_ARRAY);

And mouse location registering code:


Code :
- (void) mouseDragged:(NSEvent *)event
{
    location = [self convertPoint: [event locationInWindow] fromView:self];
    NSValue *locationValue = [NSValue valueWithPoint:location];
    [vertices addObject:locationValue];
 
        [self drawArray];
}
 
 
- (void) mouseDown:(NSEvent *)event
{
    location = [self convertPoint: [event locationInWindow] fromView:self];
    NSValue *locationValue = [NSValue valueWithPoint:location];
    [vertices addObject:locationValue];
 
        [self drawArray];
}


And my app image: