public virtual CCAffineTransform NodeToParentTransform()
{
if (m_bIsTransformDirty)
{
// Translate values
float x = m_tPosition.X;
float y = m_tPosition.Y;
if (m_bIgnoreAnchorPointForPosition)
{
x += m_tAnchorPointInPoints.X;
y += m_tAnchorPointInPoints.Y;
}
// Rotation values
float c = 1, s = 0;
if (m_fRotation != 0.0f)
{
float radians = -CCMacros.CCDegreesToRadians(m_fRotation);
c = (float)Math.Cos(radians);
s = (float)Math.Sin(radians);
}
bool needsSkewMatrix = (m_fSkewX != 0f || m_fSkewY != 0f);
// optimization:
// inline anchor point calculation if skew is not needed
if (!needsSkewMatrix && !m_tAnchorPointInPoints.Equals(CCPoint.Zero))
{
x += c * -m_tAnchorPointInPoints.X * m_fScaleX + -s * -m_tAnchorPointInPoints.Y * m_fScaleY;
y += s * -m_tAnchorPointInPoints.X * m_fScaleX + c * -m_tAnchorPointInPoints.Y * m_fScaleY;
}
// Build Transform Matrix
//m_tTransform = new CCAffineTransform(
// c * m_fScaleX, s * m_fScaleX,
// -s * m_fScaleY, c * m_fScaleY,
// x, y);
// Build Transform Matrix
m_tTransform.a = c * m_fScaleX;
m_tTransform.b = s * m_fScaleX;
m_tTransform.c = -s * m_fScaleY;
m_tTransform.d = c * m_fScaleY;
m_tTransform.tx = x;
m_tTransform.ty = y;
// XXX: Try to inline skew
// If skew is needed, apply skew and then anchor point
if (needsSkewMatrix)
{
var skewMatrix = new CCAffineTransform(
1.0f, (float)Math.Tan(CCMacros.CCDegreesToRadians(m_fSkewY)),
(float)Math.Tan(CCMacros.CCDegreesToRadians(m_fSkewX)), 1.0f,
0.0f, 0.0f);
m_tTransform = CCAffineTransform.CCAffineTransformConcat(skewMatrix, m_tTransform);
// adjust anchor point
if (!m_tAnchorPointInPoints.Equals(CCPoint.Zero))
{
m_tTransform = CCAffineTransform.CCAffineTransformTranslate(m_tTransform,
-m_tAnchorPointInPoints.X,
-m_tAnchorPointInPoints.Y);
}
}
m_bIsTransformDirty = false;
}
return(m_tTransform);
}
public void DrawCircle(CCPoint center, float radius, CCColor4B color)
{
DrawCircle(center, radius, CCMacros.CCDegreesToRadians(360f), 360, color);
}