| public AbsoluteRightXEdgeAt ( float absoluteZ ) : float | ||
| absoluteZ | float | |
| return | float | |
private void GetRenderingIndexValues(Camera camera, out int firstVertIndex, out int lastVertIndex, out int indexStart, out int numberOfTriangles)
{
firstVertIndex = 0;
lastVertIndex = mVertices.Length;
float tileWidth = mVertices[1].Position.X - mVertices[0].Position.X;
if (mSortAxis == SortAxis.X)
{
float minX = camera.AbsoluteLeftXEdgeAt(this.Z);
float maxX = camera.AbsoluteRightXEdgeAt(this.Z);
minX -= this.X;
maxX -= this.X;
firstVertIndex = GetFirstAfterX(mVertices, minX - tileWidth);
lastVertIndex = GetFirstAfterX(mVertices, maxX) + 4;
}
else if (mSortAxis == SortAxis.Y)
{
float minY = camera.AbsoluteBottomYEdgeAt(this.Z);
float maxY = camera.AbsoluteTopYEdgeAt(this.Z);
minY -= this.Y;
maxY -= this.Y;
firstVertIndex = GetFirstAfterY(mVertices, minY - tileWidth);
lastVertIndex = GetFirstAfterY(mVertices, maxY) + 4;
}
lastVertIndex = System.Math.Min(lastVertIndex, mVertices.Length);
indexStart = 0;// (firstVertIndex * 3) / 2;
int indexEndExclusive = ((lastVertIndex - firstVertIndex) * 3) / 2;
numberOfTriangles = (indexEndExclusive - indexStart) / 3;
}
