How to draw a curved line using ccBezier? - cocos2d-iphone

Question

I drew a line with -(void)draw method:
-(void)draw // code for line draw
{
glEnable(GL_LINE_SMOOTH);
CGPoint start;
start.x = 50;
start.y = 50;
CGPoint end;
end.x = 50;
end.y = 200;
if (pointOne.x>300){
pointOne.x = 300;
}
if (pointOne.y>200){
pointOne.y = 200;
}
ccDrawLine(start, pointOne);//get a line
[self Bezier:location.x:location.y:pointOne.x:pointOne.y];
}
and now I want to curve this line through Bezier in cocos2d. When I move finger that time line should draw the curve.
Bezier Code is:
- (void) Bezier:(NSInteger) CP_x:(NSInteger) CP_y:(NSInteger) end_x:(NSInteger) end_y
{
CGPoint start;
start.x = 50;
start.y = 50;
ccBezierConfig bezier;
bezier.controlPoint_1 = ccp(CP_x, CP_y);
bezier.controlPoint_2 = ccp(CP_x,CP_y);
bezier.endPosition = ccp(end_x,end_y);
}
How can I implement this line in bezier?

Answer 1

try this.
CCDrawBezier in last of your -(void)Bezier methord
ccDrawCubicBezier(StartPoint, controlPoint_1, controlPoint_2, EndPoint,NSInteger);

Answer 2

This is a method is wrote to my game.
//Bezier calculation on multiple points
//Can be set to any number of points
//The t parameter is the time 0 = start point -> 1 = end point.
//Made by Sebastian Winbladh
-(CGPoint)getBezerAtTime:(float)t array:(NSArray*)a{
int count = [a count];
float xPoints[count],yPoints[count];
int c=0;
//Makeup an array for our points
for(int i=0;i<count;i++){
CGPoint p = CGPointMake([[[a objectAtIndex:i] objectAtIndex:0] floatValue], [[[a objectAtIndex:i] objectAtIndex:1] floatValue]);
xPoints[i] = p.x;
yPoints[i] = p.y;
c++;
}
//Calculate our bezier curve here
while(c != 0){
for(int i=0;i<c-1;i++){
CGPoint p0 = CGPointMake(xPoints[i], yPoints[i]);
CGPoint p1 = CGPointMake(xPoints[i+1], yPoints[i+1]);
float dx = p1.x - p0.x;
float dy = p1.y - p0.y;
dx = p0.x + (dx * t);
dy = p0.y + (dy * t);
xPoints[i] = dx;
yPoints[i] = dy;
}c--;
}
return CGPointMake(xPoints[0], yPoints[0]);
}