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Torque/SDK/lib/maxsdk31/matrix2.h

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+/**********************************************************************
+ *<
+	FILE: matrix2.h
+
+	DESCRIPTION: Class definitions for Matrix2
+
+	CREATED BY: Dan Silva
+
+	HISTORY:
+
+ *>	Copyright (c) 1994, All Rights Reserved.
+ **********************************************************************/
+
+#ifndef __MATRIX2__ 
+
+#define __MATRIX2_
+
+#include "ioapi.h"
+#include "point2.h"
+#include "point3.h"
+
+class Matrix2 {
+	Point2& operator[](int i) { return((Point2&)(*m[i]));  }
+	Point2& operator[](int i) const { return((Point2&)(*m[i])); }
+public:
+	float m[3][2];
+
+	// Constructors
+	Matrix2(){}	 // NO INITIALIZATION done in this constructor!! (can use Zero or IdentityMatrix)
+	Matrix2(BOOL init) { IdentityMatrix(); } // An option to initialize
+
+	DllExport Matrix2(float (*fp)[2]); 
+	
+    // Data member
+    static const Matrix2 Identity;
+    
+    // Assignment operators
+	DllExport Matrix2& operator-=( const Matrix2& M);
+	DllExport Matrix2& operator+=( const Matrix2& M); 
+	DllExport Matrix2& operator*=( const Matrix2& M);  	// Matrix multiplication
+
+ 	// Conversion function
+	operator float*() { return(&m[0][0]); }
+
+	// Initialize matrix
+	DllExport void IdentityMatrix(); 	// Set to the Identity Matrix
+	DllExport void Zero();		// Set all elements to 0
+
+	Point2 GetRow(int i) const { return (*this)[i]; }	
+	DllExport void SetRow(int i, Point2 p) { (*this)[i] = p; }
+
+	DllExport Point3 GetColumn(int i);
+	DllExport void SetColumn(int i,  Point3 col);
+	DllExport Point2 GetColumn2(int i);
+
+	// Access the translation row
+	void SetTrans(const Point2 p) { (*this)[2] = p;  }
+	void SetTrans(int i, float v) { (*this)[2][i] = v;  }
+	Point2 GetTrans() { return (*this)[2]; }
+   
+	// Apply Incremental transformations to this matrix
+	DllExport void Translate(const Point2& p);
+	DllExport void Rotate(float angle);  
+	// if trans = FALSE the translation component is unaffected:
+	DllExport void Scale(const Point2& s, BOOL trans=FALSE);
+
+	// Apply Incremental transformations to this matrix
+	// Equivalent to multiplying on the LEFT by transform 
+	DllExport void PreTranslate(const Point2& p);
+	DllExport void PreRotate(float angle);  
+	DllExport void PreScale(const Point2& s, BOOL trans = FALSE);
+
+    // Set matrix as described
+    DllExport void SetTranslate(const Point2& s); // makes translation matrix
+    DllExport void SetRotate(float angle);        // makes rotation matrix
+    DllExport void Invert();
+		
+	// Binary operators		
+	DllExport Matrix2 operator*(const Matrix2& B) const;	
+	DllExport Matrix2 operator+(const Matrix2& B) const;
+	DllExport Matrix2 operator-(const Matrix2& B) const;
+
+	DllExport IOResult Save(ISave* isave);
+	DllExport IOResult Load(ILoad* iload);
+
+	};
+
+// Build new matrices for transformations
+Matrix2 DllExport RotateMatrix(float angle);   
+Matrix2 DllExport TransMatrix(const Point2& p);
+Matrix2 DllExport ScaleMatrix(const Point2& s);
+ 
+Matrix2 DllExport Inverse(const Matrix2& M);
+
+// Transform point with matrix:
+Point2 DllExport operator*(const Matrix2& A, const Point2& V);
+Point2 DllExport operator*( const Point2& V, const Matrix2& A);
+Point2 DllExport VectorTransform(const Matrix2& M, const Point2& V);
+
+// Printout
+ostream DllExport &operator<< (ostream& s, const Matrix2& A); 
+
+#endif