Forgot to add Angle class to build

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@1895 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/servers/app/proto7/Angle.cpp

@@ -0,0 +1,292 @@
+#include "Angle.h"
+
+#ifndef ANGLE_PI
+	#define ANGLE_PI 3.14159268979323846
+#endif
+
+bool tables_initialized=false;
+float sintable[360], costable[360], tantable[360];
+
+Angle::Angle(float angle)
+{
+	angle_value=angle;
+	if(tables_initialized==false)
+	{
+		InitTrigTables();
+		tables_initialized=true;
+	}
+}
+
+Angle::Angle(void)
+{
+	angle_value=0;
+	if(tables_initialized==false)
+	{
+		InitTrigTables();
+		tables_initialized=true;
+	}
+}
+
+Angle::~Angle(void)
+{
+}
+
+void Angle::Normalize(void)
+{
+	// if the value of the angle is >=360 or <0, make it so that it is 
+	// within those bounds
+	
+	if(angle_value>359)
+	{
+		while(angle_value>359)
+			angle_value-=360;
+		return;
+	}
+	if(angle_value<0)
+	{
+		while(angle_value<0)
+			angle_value+=360;
+	}
+}
+
+float Angle::Sine(void)
+{
+	return sintable[(int)angle_value];
+}
+
+Angle Angle::InvSine(float value)
+{
+	// Returns the inverse sine of a value in the range 0 <= value <= 1 via 
+	//	reverse-lookup any value out of range causes the function to return 0
+	uint16 i=90;
+	
+	// Filter out bad values
+	if(value<0)
+		value*=-1;
+
+	if(value > 1)
+		return 0;
+		
+	while(value < sintable[i])
+		i--;
+
+	// current sintable[i] is less than value. Pick the degree value which is closer
+	// to the passed value
+	if( (value - sintable[i]) > (sintable[i+1] - value) )
+		return (i+1);
+	
+	return Angle(i);		// value is closer to previous
+}
+
+
+float Angle::Cosine(void)
+{
+	return costable[(int)angle_value];
+}
+
+Angle Angle::InvCosine(float value)
+{
+	// Returns the inverse cosine of a value in the range 0 <= value <= 1 via 
+	//	reverse-lookup any value out of range causes the function to return 0
+	uint16 i=90;
+
+	// Filter out bad values
+	if(value<0)
+		value*=-1;
+
+	if(value > 1)
+		return 0;
+		
+	while(value > costable[i])
+		i--;
+
+	// current costable[i] is less than value. Pick the degree value which is closer
+	// to the passed value
+	if( (value - costable[i]) < (costable[i+1] - value) )
+		return (i+1);
+
+	return Angle(i);		// value is closer to previous
+}
+
+float Angle::Tangent(int *status=NULL)
+{
+	if(angle_value==90 || angle_value==270)
+	{
+		if(status)
+			*status=0;
+		return 0.0;
+	}
+	
+	return tantable[(int)angle_value];
+}
+
+Angle Angle::InvTangent(float value)
+{
+	// Returns the inverse cosine of a value in the range 0 <= value <= 1 via 
+	//	reverse-lookup any value out of range causes the function to return 0
+	uint16 i=90;
+
+	// Filter out bad values
+	if(value<0)
+		value*=-1;
+
+	if(value > 1)
+		return 0;
+		
+	while(value > tantable[i])
+		i--;
+
+	// current costable[i] is less than value. Pick the degree value which is closer
+	// to the passed value
+	if( (value - tantable[i]) < (tantable[i+1] - value) )
+		return (i+1);
+
+	return Angle(i);		// value is closer to previous
+}
+
+uint8 Angle::Quadrant(void)
+{
+	// Returns a value based on what quadrant the angle is in.
+	// 1: 0 <= angle <90
+	// 2: 90 <= angle < 180
+	// 3: 180 <= angle < 270
+	// 4: 270 <= angle < 360
+	
+	
+	// We can get away with not doing extra value checks because of the order in
+	// which the checks are done.
+	if(angle_value < 90)
+		return 1;
+
+	if(angle_value < 180)
+		return 2;
+
+	if(angle_value < 270)
+		return 3;
+	
+	return 4;
+}
+
+Angle Angle::Constrain180(void)
+{
+	// Constrains angle to 0 <= angle < 180
+	float val=angle_value;
+
+	if(angle_value<180)
+		return Angle(angle_value);
+
+	while(!(val<180))
+		val-=90;
+	return Angle(val);
+}
+
+Angle Angle::Constrain90(void)
+{
+	// Constrains angle to 0 <= angle < 90
+	float val=angle_value;
+
+	if(angle_value<90)
+		return Angle(angle_value);
+
+	while(!(val<90))
+		val-=90;
+	return Angle(val);
+}
+
+void Angle::SetValue(float angle)
+{
+	angle_value=angle;
+	Normalize();
+}
+
+float Angle::Value(void) const
+{
+	return angle_value;
+}
+
+void Angle::InitTrigTables(void)
+{
+	int8 i;
+	double sval,cval,tval,current_radian;
+	
+	for(i=0;i<90; i++)
+	{
+		current_radian=(i * ANGLE_PI)/180.0;
+
+		// Get these so that we can do some superfast assignments
+		sval=(float)sin(current_radian);
+		cval=(float)cos(current_radian);
+		
+		// Do 4 assignments, taking advantage of sin/cos symmetry
+		sintable[i]=sval;
+		sintable[i+90]=cval;
+		sintable[i+180]=sval * -1;
+		sintable[i+270]=cval * -1;
+		
+		costable[i]=cval;
+		costable[i+90]=sval * -1;
+		costable[i+180]=cval * -1;
+		costable[i+270]=sval;
+
+		tval=sval/cval;
+
+		tantable[i]=tval;
+		tantable[i+90]=tval;
+		tantable[i+180]=tval;
+		tantable[i+270]=tval;
+	}
+}
+
+Angle & Angle::operator=(const Angle &from)
+{
+	angle_value=from.angle_value;
+	return *this;
+}
+
+Angle & Angle::operator=(const float &from)
+{
+	angle_value=from;
+	return *this;
+}
+
+Angle & Angle::operator=(const long &from)
+{
+	angle_value=(float)from;
+	return *this;
+}
+
+Angle & Angle::operator=(const int &from)
+{
+	angle_value=(float)from;
+	return *this;
+}
+
+bool Angle::operator==(const Angle &from)
+{
+	return (angle_value==from.angle_value)?true:false;
+}
+
+bool Angle::operator!=(const Angle &from)
+{
+	return (angle_value!=from.angle_value)?true:false;
+}
+
+bool Angle::operator>(const Angle &from)
+{
+	return (angle_value>from.angle_value)?true:false;
+}
+
+bool Angle::operator<(const Angle &from)
+{
+	return (angle_value<from.angle_value)?true:false;
+}
+
+bool Angle::operator>=(const Angle &from)
+{
+	return (angle_value>=from.angle_value)?true:false;
+}
+
+bool Angle::operator<=(const Angle &from)
+{
+	return (angle_value<=from.angle_value)?true:false;
+}

src/servers/app/proto7/Angle.h

@@ -0,0 +1,46 @@
+#ifndef _ANGLE_H_
+#define _ANGLE_H_
+
+#include <GraphicsDefs.h>
+
+class Angle
+{
+public:
+	Angle(float angle);
+	Angle(void);
+	virtual ~Angle(void);
+
+	void Normalize(void);
+
+	float Sine(void);
+	Angle InvSine(float value);
+
+	float Cosine(void);
+	Angle InvCosine(float value);
+
+	float Tangent(int *status=NULL);
+	Angle InvTangent(float value);
+	
+	uint8 Quadrant(void);
+	Angle Constrain180(void);
+	Angle Constrain90(void);
+	
+	void SetValue(float angle);
+	float Value(void) const;
+	Angle &operator=(const Angle &from);
+	Angle &operator=(const float &from);
+	Angle &operator=(const long &from);
+	Angle &operator=(const int &from);
+	bool operator==(const Angle &from);
+	bool operator!=(const Angle &from);
+	bool operator<(const Angle &from);
+	bool operator>(const Angle &from);
+	bool operator>=(const Angle &from);
+	bool operator<=(const Angle &from);
+
+protected:	
+	float angle_value;
+	void InitTrigTables(void);
+};
+
+#endif