From c068f22329d5cc722622a2183bbb22eef2093df7 Mon Sep 17 00:00:00 2001
From: Felix Morgner <felix.morgner@gmail.com>
Date: Mon, 24 Aug 2026 11:16:07 +0200
Subject: initial import

---
 tool_src/BspLib/Transform3.h | 106 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 106 insertions(+)
 create mode 100644 tool_src/BspLib/Transform3.h

(limited to 'tool_src/BspLib/Transform3.h')

diff --git a/tool_src/BspLib/Transform3.h b/tool_src/BspLib/Transform3.h
new file mode 100644
index 0000000..58a1b7e
--- /dev/null
+++ b/tool_src/BspLib/Transform3.h
@@ -0,0 +1,106 @@
+//-----------------------------------------------------------------------------
+//	BSPLIB HEADER: Transform3.h
+//
+//  Copyright (c) 1997 by Markus Hadwiger
+//  All Rights Reserved.
+//-----------------------------------------------------------------------------
+
+#ifndef _TRANSFORM3_H_
+#define _TRANSFORM3_H_
+
+// bsplib header files
+#include "BspLibDefs.h"
+#include "Vertex.h"
+
+
+BSPLIB_NAMESPACE_BEGIN
+
+
+// general 3-D homogeneous transformation -------------------------------------
+//
+class Transform3 {
+
+	friend Transform3 operator *( const Transform3& trafo1, const Transform3& trafo2 );
+
+public:
+	Transform3();
+	Transform3( const float trafo[4][4] );
+	Transform3( const double trafo[4][4] );
+	~Transform3() { }
+
+	// transform single vector by current transformation
+	Vector3		TransformVector3( const Vector3& vec ) const;
+
+	// concatenate two transformations (natural and reversed order)
+	Transform3&	Concat( const Transform3& cattrafo );
+	Transform3&	ConcatR( const Transform3& cattrafo );
+
+	// create elementary matrices
+	Transform3&	LoadIdentity();
+	Transform3&	LoadRotation( double angle, double x, double y, double z );
+	Transform3&	LoadScale( double x, double y, double z );
+	Transform3&	LoadTranslation( double x, double y, double z );
+
+	// elementary transformations in natural order
+	Transform3&	Rotate( double angle, double x, double y, double z );
+	Transform3&	Scale( double x, double y, double z );
+	Transform3&	Translate( double x, double y, double z );
+
+	// elementary transformations in reversed order
+	Transform3&	RotateR( double angle, double x, double y, double z );
+	Transform3&	ScaleR( double x, double y, double z );
+	Transform3&	TranslateR( double x, double y, double z );
+
+	// fetch translation part (optionally set it null afterwards)
+	Vector3		FetchTranslation() const;
+	Vector3		ExtractTranslation();
+
+private:
+	// 4x4 matrix for 3-D homogeneous transformation (row vectors!)
+	double	m_matrix[4][4];
+};
+
+// load identity matrix -------------------------------------------------------
+inline Transform3& Transform3::LoadIdentity()
+{
+	memset( m_matrix, 0, sizeof( m_matrix ) );
+
+	m_matrix[ 0 ][ 0 ] = 1.0;
+	m_matrix[ 1 ][ 1 ] = 1.0;
+	m_matrix[ 2 ][ 2 ] = 1.0;
+	m_matrix[ 3 ][ 3 ] = 1.0;
+
+	return *this;
+}
+
+// construct a transform3 -----------------------------------------------------
+inline Transform3::Transform3()
+{
+//	LoadIdentity();
+}
+
+// construct a transform3 directly from 4x4 matrix ----------------------------
+inline Transform3::Transform3( const double trafo[4][4] )
+{
+	//CAVEAT:
+	// the outer dimension of the matrix is not enforced!!
+	// trafo is actually of type double(*)[4]
+	memcpy( m_matrix, trafo, sizeof( m_matrix ) );
+}
+
+// construct a transform3 directly from 4x4 matrix ----------------------------
+inline Transform3::Transform3( const float trafo[4][4] )
+{
+	//CAVEAT:
+	// the outer dimension of the matrix is not enforced!!
+	// trafo is actually of type float(*)[4]
+	for ( int i = 0; i < 16; i++ )
+		((double *)m_matrix)[ i ] = (double) ((float *)trafo)[ i ];
+}
+
+
+BSPLIB_NAMESPACE_END
+
+
+#endif // _TRANSFORM3_H_
+
-- 
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