/** override functions */
public virtual bool TouchBegan(CCTouch pTouch, CCEvent touchEvent)
{
if (!Visible)
{
return(false);
}
var frame = ViewRect;
//dispatcher does not know about clipping. reject touches outside visible bounds.
if (touches.Count > 2 ||
IsTouchMoved ||
!frame.ContainsPoint(container.Layer.ScreenToWorldspace(pTouch.LocationOnScreen)))
{
return(false);
}
if (!touches.Contains(pTouch))
{
touches.Add(pTouch);
}
if (touches.Count == 1)
{
// scrolling
touchPoint = Layer.ScreenToWorldspace(pTouch.LocationOnScreen);
IsTouchMoved = false;
Dragging = true; //Dragging started
scrollDistance = CCPoint.Zero;
touchLength = 0.0f;
}
else if (touches.Count == 2)
{
touchPoint = CCPoint.Midpoint(Layer.ScreenToWorldspace(touches[0].LocationOnScreen), Layer.ScreenToWorldspace(touches[1].LocationOnScreen));
touchLength = CCPoint.Distance(container.Layer.ScreenToWorldspace(touches[0].LocationOnScreen), container.Layer.ScreenToWorldspace(touches[1].LocationOnScreen));
Dragging = false;
}
return(true);
}
static void VertexLineToPolygon(CCPoint[] points, float stroke, CCV3F_C4B_T2F[] vertices, int offset, int nuPoints)
{
nuPoints += offset;
if (nuPoints <= 1)
{
return;
}
stroke *= 0.5f;
int idx;
int nuPointsMinus = nuPoints - 1;
float rad70 = MathHelper.ToRadians(70);
float rad170 = MathHelper.ToRadians(170);
for (int i = offset; i < nuPoints; i++)
{
idx = i * 2;
CCPoint p1 = points[i];
CCPoint perpVector;
if (i == 0)
{
perpVector = CCPoint.PerpendicularCCW(CCPoint.Normalize(p1 - points[i + 1]));
}
else if (i == nuPointsMinus)
{
perpVector = CCPoint.PerpendicularCCW(CCPoint.Normalize(points[i - 1] - p1));
}
else
{
CCPoint p2 = points[i + 1];
CCPoint p0 = points[i - 1];
CCPoint p2p1 = CCPoint.Normalize(p2 - p1);
CCPoint p0p1 = CCPoint.Normalize(p0 - p1);
// Calculate angle between vectors
var angle = (float)Math.Acos(CCPoint.Dot(p2p1, p0p1));
if (angle < rad70)
{
perpVector = CCPoint.PerpendicularCCW(CCPoint.Normalize(CCPoint.Midpoint(p2p1, p0p1)));
}
else if (angle < rad170)
{
perpVector = CCPoint.Normalize(CCPoint.Midpoint(p2p1, p0p1));
}
else
{
perpVector = CCPoint.PerpendicularCCW(CCPoint.Normalize(p2 - p0));
}
}
perpVector = perpVector * stroke;
vertices[idx].Vertices = new CCVertex3F(p1.X + perpVector.X, p1.Y + perpVector.Y, 0);
vertices[idx + 1].Vertices = new CCVertex3F(p1.X - perpVector.X, p1.Y - perpVector.Y, 0);
}
// Validate vertexes
offset = (offset == 0) ? 0 : offset - 1;
for (int i = offset; i < nuPointsMinus; i++)
{
idx = i * 2;
int idx1 = idx + 2;
CCVertex3F p1 = vertices[idx].Vertices;
CCVertex3F p2 = vertices[idx + 1].Vertices;
CCVertex3F p3 = vertices[idx1].Vertices;
CCVertex3F p4 = vertices[idx1 + 1].Vertices;
float s;
bool fixVertex = !VertexLineIntersect(p1.X, p1.Y, p4.X, p4.Y, p2.X, p2.Y, p3.X, p3.Y, out s);
if (!fixVertex)
{
if (s < 0.0f || s > 1.0f)
{
fixVertex = true;
}
}
if (fixVertex)
{
vertices[idx1].Vertices = p4;
vertices[idx1 + 1].Vertices = p3;
}
}
}