/*	___________________________

	A graphics header file of simple
	graphics functions.

	Author:	John E. Howland, Ph.D.
			Department of Computer Science
			Trinity University
			715 Stadium Drive
			San Antonio, Texas  78212
			Voice:	(512) 736-7480
			Fax:	(512) 694-0125
			Bitnet:	jhowland@trinity.edu
	
	Last Change:  900903 (Added some functionality for SGRP)
*/

#include <math.h>

/*	______________________________________________________________

	constants

*/

#define PLAIN_WINDOW 0			/* plain WindowFrame style */
#define DROP_SHADOW_WINDOW 1	/* drop shadow WindowFrame style */
#define TICKLENGTH 6			/* size, in pixels of a tick mark */
#define MARKER_SIZE 2			/* default MarkerSize */
#define MARKER_CIRCLE 0			/* circle MarkerStyle */
#define MARKER_SQUARE 1			/* square MarkerStyle */
#define LINE_WIDTH 1			/* default LineWidth */
#define CONTINUOUS 0			/* default LineStyle (continuous) */
#define DASHED 1				/* dashed LineStyle */
#define DOTTED 2				/* dotted LineStyle */

/*	______________________________________________________________

	types and globals

*/

typedef double Xform[3][3];	/* the transform type */
typedef struct				/* a rectangle in world coordinates */
{
	double	top, left, bottom, right;
} windRect ;
	
Rect _viewport;			/* the viewport */
windRect _window;		/* the window */
double _windowCenterx, _windowCentery;
short _viewportCenterx, _viewportCentery;
double _scalex, _scaley;/* the x and y scale factors */
double _cx, _cy;		/* the graphics cursor location(world) */
GrafPtr gOldPort;		/* the previous (console) GrafPtr */
Boolean gPreserveAspectRatio = FALSE;	/* Don't preserve aspect ratio */
short gWindowFrame = PLAIN_WINDOW;	/* default window or viewport frame */
short gMarkerSize = MARKER_SIZE;	/* default MarkerSize in pixels */
short gMarkerStyle = MARKER_CIRCLE;	/* default MarkerStyle (circle) */
short gLineWidth = LINE_WIDTH;		/* default Line Width 1 */
short gLineStyle = CONTINUOUS;		/* Line Style */

/*	______________________________________________________________

	function prototypes

*/

void initToolboxManagers(void);
WindowPtr makeDrawingWindow(char *name, int left, int top, int right, int bottom);
void disposeDrawingWindow(WindowPtr wPtr, int sec);
void setScale(void);
void setWindow(double top, double left, double bottom, double right);
void setViewport(short top, short left, short bottom, short right);
void view(double x, double y, short *viewx, short *viewy);
void FrameViewport(void);
void FrameWindow(void);
void waitForKey(void);
void waitForMouse(void);
void eraseConsole(void);
void circle(double x, double y, double r);
void label(char *s);
void point(double x, double y);
void verticalTickMark(double x, double y, char *str);
void horizontalTickMark(double x, double y, char *str);
void scale(double sx, double sy, Xform transMatrix);
void translate(double tx, double ty, Xform transMatrix);
void rotate(double theta, Xform transMatrix);
void multXform(Xform x, Xform y, Xform z);
void printXform(Xform xform);
void transformObject(int n, double object[][3], Xform xform, double result[][3]);
void printObject(int n, double object[][3]);
Boolean readObject(int *n, double object[][3]);
void centerObject(int n, double object[][3], double *xcenter, double *ycenter);
void drawObject(int n, double object[][3]);
Boolean getInteger(int *x);
Boolean getDoubleFloat(double *x);
void plotBar(double x, double y);
void plotPoint(double x, double y);
void eraseViewport(void);
void eraseWindow(void);

/*

These are the normal QuickDraw functions

void LineTo(int x, int y);
void Line(int dx, int dy);
void MoveTo(int x, int y);
void Move(int dx, int dy);
*/

void lineto(double x, double y);
void line(double dx, double dy);
void moveto(double x, double y);
void move(double dx, double dy);
void drawline(double x, double y, double x1, double y1);

void SRGP_lineCoord(short x1, short y1, short x2, short y2);
void SRGP_line(Point pt1, Point pt2);
void SRGP_polyLineCoord(short vertexCount, short xArray[], short yArray[]);
void SRGP_polyLine(short vertexCount, Point vertexList[]);
void SRGP_setMarkerSize(short value);
void SRGP_setMarkerStyle(short value);
void SRGP_markerCoord(short x, short y);
void SRGP_marker(Point pt);
void SRGP_polyMarkerCoord(short vertexCount, short xArray[], short yArray[]);
void SRGP_polyMarker(short vertexCount, Point vertexList[]);
void SRGP_rectangleCoord(short leftX, short leftY, short rightX, short rightY);
void SRGP_rectanglePt(Point bottomLeft, Point topRight);
void SRGP_rectangle(Rect *rectangle);
void SRGP_defPoint(short x, short y, Point *pt);
void SRGP_defRectangle(short leftX, short leftY, short rightX, short rightY, Rect *rectangle);
void SRGP_ellipseArc(Rect *extentRect, double startAngle, double endAngle);
void SRGP_setLineStyle(short value);
void SRGP_setLineWidth(short value);