public CCAffineTransform NodeToWorldTransform()
{
CCAffineTransform t = NodeToParentTransform();
CCNode p = m_pParent;
while (p != null)
{
t.Concat(p.NodeToParentTransform());
p = p.Parent;
}
return(t);
}
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.Concat(skewMatrix, m_tTransform);
// adjust anchor point
if (!m_tAnchorPointInPoints.Equals(CCPoint.Zero))
{
m_tTransform = CCAffineTransform.Translate(m_tTransform,
-m_tAnchorPointInPoints.X,
-m_tAnchorPointInPoints.Y);
}
}
m_bIsTransformDirty = false;
}
return(m_tTransform);
}
public virtual CCAffineTransform NodeToParentTransform()
{
if (m_bTransformDirty)
{
// Translate values
float x = m_obPosition.X;
float y = m_obPosition.Y;
if (m_bIgnoreAnchorPointForPosition)
{
x += m_obAnchorPointInPoints.X;
y += m_obAnchorPointInPoints.Y;
}
// Rotation values
// Change rotation code to handle X and Y
// If we skew with the exact same value for both x and y then we're simply just rotating
float cx = 1, sx = 0, cy = 1, sy = 0;
if (m_fRotationX != 0 || m_fRotationY != 0)
{
float radiansX = -CCMacros.CCDegreesToRadians(m_fRotationX);
float radiansY = -CCMacros.CCDegreesToRadians(m_fRotationY);
cx = (float)Math.Cos(radiansX);
sx = (float)Math.Sin(radiansX);
cy = (float)Math.Cos(radiansY);
sy = (float)Math.Sin(radiansY);
}
bool needsSkewMatrix = (m_fSkewX != 0f || m_fSkewY != 0f);
// optimization:
// inline anchor point calculation if skew is not needed
if (!needsSkewMatrix && !m_obAnchorPointInPoints.Equals(CCPoint.Zero))
{
x += cy * -m_obAnchorPointInPoints.X * m_fScaleX + -sx * -m_obAnchorPointInPoints.Y * m_fScaleY;
y += sy * -m_obAnchorPointInPoints.X * m_fScaleX + cx * -m_obAnchorPointInPoints.Y * m_fScaleY;
}
// Build Transform Matrix
// Adjusted transform calculation for rotational skew
m_sTransform.a = cy * m_fScaleX;
m_sTransform.b = sy * m_fScaleX;
m_sTransform.c = -sx * m_fScaleY;
m_sTransform.d = cx * m_fScaleY;
m_sTransform.tx = x;
m_sTransform.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_sTransform = CCAffineTransform.Concat(skewMatrix, m_sTransform);
// adjust anchor point
if (!m_obAnchorPointInPoints.Equals(CCPoint.Zero))
{
m_sTransform = CCAffineTransform.Translate(m_sTransform,
-m_obAnchorPointInPoints.X,
-m_obAnchorPointInPoints.Y);
}
}
if (m_bAdditionalTransformDirty)
{
m_sTransform.Concat(ref m_sAdditionalTransform);
m_bAdditionalTransformDirty = false;
}
m_bTransformDirty = false;
}
return(m_sTransform);
}
public override void UpdateTransform()
{
Debug.Assert(m_pobBatchNode != null,
"updateTransform is only valid when CCSprite is being rendered using an CCSpriteBatchNode");
// recaculate matrix only if it is dirty
if (Dirty)
{
// If it is not visible, or one of its ancestors is not visible, then do nothing:
if (!m_bVisible ||
(m_pParent != null && m_pParent != m_pobBatchNode && ((CCSprite)m_pParent).m_bShouldBeHidden))
{
m_sQuad.BottomRight.Vertices =
m_sQuad.TopLeft.Vertices = m_sQuad.TopRight.Vertices = m_sQuad.BottomLeft.Vertices = new CCVertex3F(0, 0, 0);
m_bShouldBeHidden = true;
}
else
{
m_bShouldBeHidden = false;
if (m_pParent == null || m_pParent == m_pobBatchNode)
{
m_transformToBatch = NodeToParentTransform();
}
else
{
Debug.Assert((m_pParent as CCSprite) != null,
"Logic error in CCSprite. Parent must be a CCSprite");
m_transformToBatch = CCAffineTransform.Concat(NodeToParentTransform(),
((CCSprite)m_pParent).
m_transformToBatch);
}
//
// calculate the Quad based on the Affine Matrix
//
CCSize size = m_obRect.Size;
float x1 = m_obOffsetPosition.X;
float y1 = m_obOffsetPosition.Y;
float x2 = x1 + size.Width;
float y2 = y1 + size.Height;
float x = m_transformToBatch.tx;
float y = m_transformToBatch.ty;
float cr = m_transformToBatch.a;
float sr = m_transformToBatch.b;
float cr2 = m_transformToBatch.d;
float sr2 = -m_transformToBatch.c;
float ax = x1 * cr - y1 * sr2 + x;
float ay = x1 * sr + y1 * cr2 + y;
float bx = x2 * cr - y1 * sr2 + x;
float by = x2 * sr + y1 * cr2 + y;
float cx = x2 * cr - y2 * sr2 + x;
float cy = x2 * sr + y2 * cr2 + y;
float dx = x1 * cr - y2 * sr2 + x;
float dy = x1 * sr + y2 * cr2 + y;
m_sQuad.BottomLeft.Vertices = new CCVertex3F(ax, ay, m_fVertexZ);
m_sQuad.BottomRight.Vertices = new CCVertex3F(bx, by, m_fVertexZ);
m_sQuad.TopLeft.Vertices = new CCVertex3F(dx, dy, m_fVertexZ);
m_sQuad.TopRight.Vertices = new CCVertex3F(cx, cy, m_fVertexZ);
}
m_pobTextureAtlas.UpdateQuad(ref m_sQuad, m_uAtlasIndex);
m_bRecursiveDirty = false;
m_bDirty = false;
}
// recursively iterate over children
if (m_bHasChildren)
{
CCNode[] elements = m_pChildren.Elements;
if (m_pobBatchNode != null)
{
for (int i = 0, count = m_pChildren.count; i < count; i++)
{
((CCSprite)elements[i]).UpdateTransform();
}
}
else
{
for (int i = 0, count = m_pChildren.count; i < count; i++)
{
var sprite = elements[i] as CCSprite;
if (sprite != null)
{
sprite.UpdateTransform();
}
}
}
}
}
