// Draw the pattern (at the given angle) inside the path.
void DrawPattern(GraphicsTarget g, SymPathWithHoles path, float angle, SymColor color, RenderOptions renderOpts)
{
object graphicsState = g.Save();
try {
// Set the clipping region to draw only inside the area.
g.SetClip(path);
// use a transform to rotate
Matrix matrix = GraphicsUtil.RotationMatrix(patternAngle + angle, new PointF(0, 0));
g.Transform(matrix);
// Get the correct bounding rect.
RectangleF bounding = Util.BoundsOfRotatedRectangle(path.BoundingBox, new PointF(), -(patternAngle + angle));
DrawPatternRows(g, bounding, color, renderOpts);
}
finally {
// restore the clip region and the transform
g.Restore(graphicsState);
}
}
// Draw the pattern using the texture brush.
void DrawPatternWithTexBrush(GraphicsTarget g, SymPathWithHoles path, float angle, SymColor color, RenderOptions renderOpts)
{
Brush brush = (Brush) patternBrushes[color];
Debug.Assert(brush != null);
if (angle != 0.0F) {
object graphicsState = g.Save();
try {
// Set the clipping region to draw only inside the area.
g.SetClip(path);
// use a transform to rotate.
Matrix matrix = GraphicsUtil.RotationMatrix(angle, new PointF(0, 0));
g.Transform(matrix);
// Get the correct bounding rect.
RectangleF bounding = Util.BoundsOfRotatedRectangle(path.BoundingBox, new PointF(), -angle);
g.FillRectangle(brush, bounding);
}
finally {
// restore the clip region and the transform
g.Restore(graphicsState);
}
}
else {
path.Fill(g, brush);
}
}
// Draw the hatching into the interior of the SymPath.
void DrawHatching(GraphicsTarget g, SymPathWithHoles path, float angle, RenderOptions renderOpts)
{
object graphicsState = g.Save();
try {
// Set the clipping region to draw only inside the area.
g.SetClip(path);
// use a transform to rotate and then draw hatching.
Matrix matrix = GraphicsUtil.RotationMatrix(hatchAngle1 + angle, new PointF(0, 0));
g.Transform(matrix);
// Get the correct bounding rect.
RectangleF bounding = Util.BoundsOfRotatedRectangle(path.BoundingBox, new PointF(), -(hatchAngle1 + angle));
DrawHatchLines(g, hatchPen, hatchSpacing, bounding, renderOpts);
// and again for the second bound of hatching
if (hatchMode == 2) {
// Get the correct bounding rect.
bounding = Util.BoundsOfRotatedRectangle(path.BoundingBox, new PointF(), -(hatchAngle2 + angle));
matrix = GraphicsUtil.RotationMatrix(hatchAngle2 - hatchAngle1, new PointF(0, 0));
g.Transform(matrix);
DrawHatchLines(g, hatchPen, hatchSpacing, bounding, renderOpts);
}
}
finally {
// restore the clip region and the transform
g.Restore(graphicsState);
}
}