/// <summary>
/// Switches meshes and loads new bitmaps if available. Updated to support 2 pages in landscape
/// </summary>
/// <param name="page"></param>
private void StartCurl(int page)
{
switch (page)
{
// Once right side page is curled, first right page is assigned into
// curled page. And if there are more bitmaps available new bitmap is
// loaded into right side mesh.
case CURL_RIGHT:
{
// Remove meshes from renderer.
mRenderer.RemoveCurlMesh(mPageLeft);
mRenderer.RemoveCurlMesh(mPageRight);
mRenderer.RemoveCurlMesh(mPageCurl);
// We are curling right page.
CurlMesh curl = mPageRight;
mPageRight = mPageCurl;
mPageCurl = curl;
if (mCurrentIndex > 0)
{
mPageLeft.FlipTexture = true;
mPageLeft.Rect = mRenderer.GetPageRect(CurlRenderer.PAGE_LEFT);
mPageLeft.Reset();
if (mRenderLeftPage)
{
mRenderer.AddCurlMesh(mPageLeft);
}
}
if (mCurrentIndex < mPageProvider.PageCount - 1)
{
UpdatePage(mPageRight.TexturePage, mCurrentIndex + 1);
mPageRight.Rect = mRenderer.GetPageRect(CurlRenderer.PAGE_RIGHT);
mPageRight.FlipTexture = false;
mPageRight.Reset();
mRenderer.AddCurlMesh(mPageRight);
}
// Add curled page to renderer.
mPageCurl.Rect = mRenderer.GetPageRect(CurlRenderer.PAGE_RIGHT);
mPageCurl.FlipTexture = (false);
mPageCurl.Reset();
mRenderer.AddCurlMesh(mPageCurl);
mCurlState = CURL_RIGHT;
break;
}
// On left side curl, left page is assigned to curled page. And if
// there are more bitmaps available before currentIndex, new bitmap
// is loaded into left page.
case CURL_LEFT:
{
// Remove meshes from renderer.
mRenderer.RemoveCurlMesh(mPageLeft);
mRenderer.RemoveCurlMesh(mPageRight);
mRenderer.RemoveCurlMesh(mPageCurl);
// We are curling left page.
CurlMesh curl = mPageLeft;
mPageLeft = mPageCurl;
mPageCurl = curl;
if (mCurrentIndex > 1)
{
UpdatePage(mPageLeft.TexturePage, mCurrentIndex - 2);
mPageLeft.FlipTexture = true;
mPageLeft.Rect = mRenderer.GetPageRect(CurlRenderer.PAGE_LEFT);
mPageLeft.Reset();
if (mRenderLeftPage)
{
mRenderer.AddCurlMesh(mPageLeft);
}
}
// If there is something to show on right page add it to renderer.
if (mCurrentIndex < mPageProvider.PageCount)
{
mPageRight.FlipTexture = false;
mPageRight.Rect = mRenderer.GetPageRect(CurlRenderer.PAGE_RIGHT);
mPageRight.Reset();
mRenderer.AddCurlMesh(mPageRight);
}
// How dragging previous page happens depends on view mode.
if (mViewMode == SHOW_ONE_PAGE ||
(mCurlState == CURL_LEFT && mViewMode == SHOW_TWO_PAGES))
{
mPageCurl.Rect = mRenderer.GetPageRect(CurlRenderer.PAGE_RIGHT);
mPageCurl.FlipTexture = false;
}
else
{
mPageCurl.Rect = mRenderer.GetPageRect(CurlRenderer.PAGE_LEFT);
mPageCurl.FlipTexture = (true);
}
mPageCurl.Reset();
mRenderer.AddCurlMesh(mPageCurl);
mCurlState = CURL_LEFT;
break;
}
}
}
public void OnDrawFrame()
{
// We are not animating.
if (mAnimate == false)
{
return;
}
long currentTime = DateTimeOffset.Now.ToUnixTimeMilliseconds();
// If animation is done.
if (currentTime >= mAnimationStartTime + mAnimationDurationTime)
{
if (mAnimationTargetEvent == SET_CURL_TO_RIGHT)
{
// Switch curled page to right.
CurlMesh right = mPageCurl;
CurlMesh curl = mPageRight;
right.Rect = mRenderer.GetPageRect(CurlRenderer.PAGE_RIGHT);
right.FlipTexture = false;
right.Reset();
mRenderer.RemoveCurlMesh(curl);
mPageCurl = curl;
mPageRight = right;
// If we were curling left page update current index.
if (mCurlState == CURL_LEFT)
{
--mCurrentIndex;
}
}
else if (mAnimationTargetEvent == SET_CURL_TO_LEFT)
{
// Switch curled page to left.
CurlMesh left = mPageCurl;
CurlMesh curl = mPageLeft;
left.Rect = mRenderer.GetPageRect(CurlRenderer.PAGE_LEFT);
left.FlipTexture = (true);
left.Reset();
mRenderer.RemoveCurlMesh(curl);
if (!mRenderLeftPage)
{
mRenderer.RemoveCurlMesh(left);
}
mPageCurl = curl;
mPageLeft = left;
// If we were curling right page update current index.
if (mCurlState == CURL_RIGHT)
{
++mCurrentIndex;
}
}
mCurlState = CURL_NONE;
mAnimate = false;
RequestRender();
}
else
{
mPointerPos.mPos.Set(mAnimationSource);
float t = 1f - ((float)(currentTime - mAnimationStartTime) / mAnimationDurationTime);
t = 1f - (t * t * t * (3 - 2 * t));
mPointerPos.mPos.X += (mAnimationTarget.X - mAnimationSource.X) * t;
mPointerPos.mPos.Y += (mAnimationTarget.Y - mAnimationSource.Y) * t;
UpdateCurlPosition(mPointerPos);
}
}