Method AddRoundJoint

trinity/Sprite2d/Tr2Sprite2dLineTrace.cpp:527–635

}

void Tr2Sprite2dLineTrace::AddRoundJoint(
	Tr2Sprite2dScene* renderer,
	float capAngleTo,
	Tr2Sprite2dVertexBase v2,
	Tr2Sprite2dVertexBase v3,
	Vector2 normal,
	Color color,
	bool isAA,
	float pixelWidthInTexels,
	float halfWidth )
{
	uint16_t fanBase;
	Vector2 fanBaseTranslation( 0, 0 );
	auto fanVertexBase = m_renderVertices.size();
	float sign = 1.0f;
	float jointWidth = halfWidth * 2.0f;

	// Determine fan base point
	if( capAngleTo < 0.0f )
	{
		fanBase = 2 + (uint16_t)fanVertexBase - 4;
		fanBaseTranslation = v2.position.GetXY();
		sign = -1.0f;
	}
	else if( capAngleTo > 0.0f )
	{
		fanBase = 3 + (uint16_t)fanVertexBase - 4;
		fanBaseTranslation = v3.position.GetXY();
	}

	// calculate joint angle
	float startAngle = atan2( normal.y, normal.x );
	float endAngle = startAngle + capAngleTo;
	float angleDiff = endAngle - startAngle;

	// calculate arc length and number of steps
	float arcLength = angleDiff * m_lineWidth;
	unsigned int numSteps = (unsigned int)std::abs( arcLength ) / 4;

	if( numSteps < 2 )
		numSteps = 2;
	float stepSize = angleDiff / (float)numSteps;
	++numSteps;

	if( numSteps > jointWidth )
	{
		numSteps = (unsigned int)m_lineWidth;
		stepSize = angleDiff / (float)( numSteps - 1 );
	}

	// Create verticies
	Tr2Sprite2dVertexBase* fanVerts = static_cast<Tr2Sprite2dVertexBase*>( CCP_MALLOC(
		"Tr2Sprite2dLineTrace/fanVerts",
		numSteps * sizeof( Tr2Sprite2dVertexBase ) ) );
	Tr2Sprite2dVertexBase* currentVertex = fanVerts;

	// Construct outer joint vertexes
	float a = startAngle;