void JigsawPuzzleRenderer::CreatePuzzlePieceGeometry()
{
// Create the geometry outline for the jigsaw puzzle piece.
ComPtr<ID2D1PathGeometry> path;
ComPtr<ID2D1GeometrySink> sink;
DX::ThrowIfFailed(m_deviceResources->GetD2DFactory()->CreatePathGeometry(&path));
DX::ThrowIfFailed(path->Open(&sink));
// The following math calculates the information needed to determine where the arcs for the puzzle piece connector begin and end.
// The inner radius is the radius of the arc that defines the stem of the connector. The outer radius is the radius of the arc
// that defines the connector.
float edgeLength = Constants::PuzzlePieceSize;
float innerRadius = Constants::PuzzlePieceConnectorInnerRadius;
float outerRadius = Constants::PuzzlePieceConnectorOuterRadius;
float stemPosition = (edgeLength / 2.0f) - (innerRadius * 2.0f);
float connectorParallelOffset = (2.0f * pow(innerRadius, 2.0f)) / (innerRadius + outerRadius);
float connectorPerpendicularOffset = sqrt(pow(innerRadius, 2.0f) - pow(connectorParallelOffset, 2.0f)) + innerRadius;
sink->BeginFigure(D2D1::Point2F(0, 0), D2D1_FIGURE_BEGIN_FILLED);
sink->AddLine(D2D1::Point2F(edgeLength, 0));
sink->AddLine(D2D1::Point2F(edgeLength, stemPosition));
sink->AddArc(
D2D1::ArcSegment(
D2D1::Point2F(edgeLength - connectorPerpendicularOffset, stemPosition + connectorParallelOffset),
D2D1::SizeF(innerRadius, innerRadius),
0.0f,
D2D1_SWEEP_DIRECTION_CLOCKWISE,
D2D1_ARC_SIZE_SMALL
)
);
sink->AddArc(
D2D1::ArcSegment(
D2D1::Point2F(edgeLength - connectorPerpendicularOffset, edgeLength - stemPosition - connectorParallelOffset),
D2D1::SizeF(outerRadius, outerRadius),
0.0f,
D2D1_SWEEP_DIRECTION_COUNTER_CLOCKWISE,
D2D1_ARC_SIZE_LARGE
)
);
sink->AddArc(
D2D1::ArcSegment(
D2D1::Point2F(edgeLength, edgeLength - stemPosition),
D2D1::SizeF(innerRadius, innerRadius),
0.0f,
D2D1_SWEEP_DIRECTION_CLOCKWISE,
D2D1_ARC_SIZE_SMALL
)
);
sink->AddLine(D2D1::Point2F(edgeLength, edgeLength));
sink->AddLine(D2D1::Point2F(edgeLength - stemPosition, edgeLength));
sink->AddArc(
D2D1::ArcSegment(
D2D1::Point2F(edgeLength - stemPosition - connectorParallelOffset, edgeLength + connectorPerpendicularOffset),
D2D1::SizeF(innerRadius, innerRadius),
0.0f,
D2D1_SWEEP_DIRECTION_COUNTER_CLOCKWISE,
D2D1_ARC_SIZE_SMALL
)
);
sink->AddArc(
D2D1::ArcSegment(
D2D1::Point2F(stemPosition + connectorParallelOffset, edgeLength + connectorPerpendicularOffset),
D2D1::SizeF(outerRadius, outerRadius),
0.0f,
D2D1_SWEEP_DIRECTION_CLOCKWISE,
D2D1_ARC_SIZE_LARGE
)
);
sink->AddArc(
D2D1::ArcSegment(
D2D1::Point2F(stemPosition, edgeLength),
D2D1::SizeF(innerRadius, innerRadius),
0.0f,
D2D1_SWEEP_DIRECTION_COUNTER_CLOCKWISE,
D2D1_ARC_SIZE_SMALL
)
);
sink->AddLine(D2D1::Point2F(0, edgeLength));
sink->EndFigure(D2D1_FIGURE_END_CLOSED);
DX::ThrowIfFailed(sink->Close());
m_geometry = path;
}