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/* -----------------------------------------------------------------------------
* gifplot.h
*
* Main header file for the GIFPlot library.
*
* Author(s) : David Beazley (beazley@cs.uchicago.edu)
* Copyright (C) 1995-1996
*
* See the file LICENSE for information on usage and redistribution.
* ----------------------------------------------------------------------------- */
#include <stdio.h>
#include <fcntl.h>
#include <float.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#ifndef GIFPLOT_H
/* Pixel is 8-bits */
typedef unsigned char Pixel;
typedef float Zvalue;
/* ------------------------------------------------------------------------
ColorMap
Definition and methods for colormaps
------------------------------------------------------------------------ */
typedef struct ColorMap {
unsigned char *cmap;
char *name;
} ColorMap;
extern ColorMap *new_ColorMap(char *filename);
extern void delete_ColorMap(ColorMap *c);
extern void ColorMap_default(ColorMap *c);
extern void ColorMap_assign(ColorMap *c, int index, int r, int g, int b);
extern int ColorMap_getitem(ColorMap *c, int index);
extern void ColorMap_setitem(ColorMap *c, int index, int value);
extern int ColorMap_write(ColorMap *c, char *filename);
/* Some default colors */
#define BLACK 0
#define WHITE 1
#define RED 2
#define GREEN 3
#define BLUE 4
#define YELLOW 5
#define CYAN 6
#define MAGENTA 7
/*-------------------------------------------------------------------------
FrameBuffer
This structure defines a simple 8 bit framebuffer.
------------------------------------------------------------------------- */
typedef struct FrameBuffer {
Pixel **pixels;
Zvalue **zbuffer;
unsigned int height;
unsigned int width;
int xmin; /* These are used for clipping */
int ymin;
int xmax;
int ymax;
} FrameBuffer;
#define ZMIN 1e+36
/* FrameBuffer Methods */
extern FrameBuffer *new_FrameBuffer(unsigned int width, unsigned int height);
extern void delete_FrameBuffer(FrameBuffer *frame);
extern int FrameBuffer_resize(FrameBuffer *frame, int width, int height);
extern void FrameBuffer_clear(FrameBuffer *frame, Pixel color);
extern void FrameBuffer_plot(FrameBuffer *frame, int x, int y, Pixel color);
extern void FrameBuffer_horizontal(FrameBuffer *frame, int xmin, int xmax, int y, Pixel color);
extern void FrameBuffer_horizontalinterp(FrameBuffer *f, int xmin, int xmax, int y, Pixel c1, Pixel c2);
extern void FrameBuffer_vertical(FrameBuffer *frame, int ymin, int ymax, int x, Pixel color);
extern void FrameBuffer_box(FrameBuffer *frame, int x1, int y1, int x2, int y2, Pixel color);
extern void FrameBuffer_solidbox(FrameBuffer *frame, int x1, int y1, int x2, int y2, Pixel color);
extern void FrameBuffer_interpbox(FrameBuffer *f, int x1, int y1, int x2, int y2, Pixel c1, Pixel c2, Pixel c3, Pixel c4);
extern void FrameBuffer_circle(FrameBuffer *frame, int x1, int y1, int radius, Pixel color);
extern void FrameBuffer_solidcircle(FrameBuffer *frame, int x1, int y1, int radius, Pixel color);
extern void FrameBuffer_line(FrameBuffer *frame, int x1, int y1, int x2, int y2, Pixel color);
extern void FrameBuffer_setclip(FrameBuffer *frame, int xmin, int ymin, int xmax, int ymax);
extern void FrameBuffer_noclip(FrameBuffer *frame);
extern int FrameBuffer_makeGIF(FrameBuffer *frame, ColorMap *cmap, void *buffer, unsigned int maxsize);
extern int FrameBuffer_writeGIF(FrameBuffer *f, ColorMap *c, char *filename);
extern void FrameBuffer_zresize(FrameBuffer *f, int width, int height);
extern void FrameBuffer_zclear(FrameBuffer *f);
extern void FrameBuffer_solidtriangle(FrameBuffer *f, int x1, int y1, int x2, int y2, int x3, int y3, Pixel c);
extern void FrameBuffer_interptriangle(FrameBuffer *f, int tx1, int ty1, Pixel c1,
int tx2, int ty2, Pixel c2, int tx3, int ty3, Pixel c3);
#define HORIZONTAL 1
#define VERTICAL 2
extern void FrameBuffer_drawchar(FrameBuffer *frame, int x, int y, int fgcolor, int bgcolor, char chr, int orientation);
extern void FrameBuffer_drawstring(FrameBuffer *f, int x, int y, int fgcolor, int bgcolor, char *text, int orientation);
/* ------------------------------------------------------------------------
PixMap
The equivalent of "bit-maps".
------------------------------------------------------------------------ */
typedef struct PixMap {
int width;
int height;
int centerx;
int centery;
int *map;
} PixMap;
/* PIXMAP methods */
extern PixMap *new_PixMap(int width, int height, int centerx, int centery);
extern void delete_PixMap(PixMap *pm);
extern void PixMap_set(PixMap *pm, int x, int y, int pix);
extern void FrameBuffer_drawpixmap(FrameBuffer *f, PixMap *pm, int x, int y, int fgcolor, int bgcolor);
#define TRANSPARENT 0
#define FOREGROUND 1
#define BACKGROUND 2
/* ------------------------------------------------------------------------
Plot2D
Definition and methods for 2D plots.
------------------------------------------------------------------------ */
typedef struct Plot2D {
FrameBuffer *frame; /* what frame buffer are we using */
int view_xmin; /* Minimum coordinates of view region */
int view_ymin;
int view_xmax; /* Maximum coordinates of view region */
int view_ymax;
double xmin; /* Minimum coordinates of plot region */
double ymin;
double xmax; /* Maximum coordinates of plot region */
double ymax;
int xscale; /* Type of scaling (LINEAR, LOG, etc..) */
int yscale;
double dx; /* Private scaling parameters */
double dy;
} Plot2D;
/* 2D Plot methods */
extern Plot2D *new_Plot2D(FrameBuffer *frame,double xmin,double ymin, double xmax, double ymax);
extern void delete_Plot2D(Plot2D *p2);
extern Plot2D *Plot2D_copy(Plot2D *p2);
extern void Plot2D_clear(Plot2D *p2, Pixel c);
extern void Plot2D_setview(Plot2D *p2, int vxmin, int vymin, int vxmax, int vymax);
extern void Plot2D_setrange(Plot2D *p2, double xmin, double ymin, double xmax, double ymax);
extern void Plot2D_setscale(Plot2D *p2, int xscale, int yscale);
extern void Plot2D_plot(Plot2D *p2, double x, double y, Pixel color);
extern void Plot2D_box(Plot2D *p2, double x1, double y1, double x2, double y2, Pixel color);
extern void Plot2D_solidbox(Plot2D *p2, double x1, double y1,double x2, double y2, Pixel color);
extern void Plot2D_interpbox(Plot2D *p2, double x1, double y1, double x2, double y2, Pixel c1, Pixel c2, Pixel c3, Pixel c4);
extern void Plot2D_circle(Plot2D *p2, double x, double y, double radius, Pixel color);
extern void Plot2D_solidcircle(Plot2D *p2, double x, double y, double radius, Pixel color);
extern void Plot2D_line(Plot2D *p2, double x1, double y1, double x2, double y2, Pixel color);
extern void Plot2D_start(Plot2D *p2);
extern void Plot2D_drawpixmap(Plot2D *p2, PixMap *pm, double x, double y, Pixel color, Pixel bgcolor);
extern void Plot2D_xaxis(Plot2D *p2, double x, double y, double xtick, int ticklength, Pixel c);
extern void Plot2D_yaxis(Plot2D *p2, double x, double y, double ytick, int ticklength, Pixel c);
extern void Plot2D_triangle(Plot2D *p2, double x1, double y1, double x2, double y2, double x3, double y3, Pixel c);
extern void Plot2D_solidtriangle(Plot2D *p2, double x1, double y1, double x2, double y2, double x3, double y3, Pixel c);
extern void Plot2D_interptriangle(Plot2D *p2, double x1, double y1, Pixel c1,
double x2, double y2, Pixel c2,
double x3, double y3, Pixel c3);
#define LINEAR 10
#define LOG 11
/* -----------------------------------------------------------------------
Matrix
Operations on 4x4 transformation matrices and vectors.
Matrices are represented as a double array of 16 elements
----------------------------------------------------------------------- */
typedef double *Matrix;
typedef struct GL_Vector {
double x;
double y;
double z;
double w;
} GL_Vector;
extern Matrix new_Matrix();
extern void delete_Matrix(Matrix a);
extern Matrix Matrix_copy(Matrix a);
extern void Matrix_multiply(Matrix a, Matrix b, Matrix c);
extern void Matrix_identity(Matrix a);
extern void Matrix_zero(Matrix a);
extern void Matrix_transpose(Matrix a, Matrix result);
extern void Matrix_invert(Matrix a, Matrix inva);
extern void Matrix_transform(Matrix a, GL_Vector *r, GL_Vector *t);
extern void Matrix_transform4(Matrix a, double rx, double ry, double rz,
double rw, GL_Vector *t);
extern void Matrix_print(Matrix a);
extern void Matrix_translate(Matrix a, double tx, double ty, double tz);
extern void Matrix_rotatex(Matrix a, double deg);
extern void Matrix_rotatey(Matrix a, double deg);
extern void Matrix_rotatez(Matrix a, double deg);
/* -----------------------------------------------------------------------
Plot3D
Data Structure for 3-D plots
------------------------------------------------------------------------ */
typedef struct Plot3D {
FrameBuffer *frame; /* Frame buffer being used */
int view_xmin; /* Viewing region */
int view_ymin;
int view_xmax;
int view_ymax;
double xmin; /* Bounding box */
double ymin;
double zmin;
double xmax;
double ymax;
double zmax;
double xcenter; /* Center point */
double ycenter;
double zcenter;
double fovy; /* Field of view */
double aspect; /* Aspect ratio */
double znear; /* near "clipping" plane */
double zfar; /* far "clipping" plane */
Matrix center_mat; /* Matrix used for centering the model */
Matrix model_mat; /* Model rotation matrix */
Matrix view_mat; /* Viewing matrix */
Matrix fullmodel_mat; /* Full model matrix. Used by sphere plot */
Matrix trans_mat; /* Total transformation matrix */
double lookatz; /* Where is the z-lookat point */
double xshift; /* Used for translation and stuff */
double yshift;
double zoom;
int width;
int height;
int pers_mode; /* Perspective mode (private) */
double ortho_left,ortho_right,ortho_bottom,ortho_top;
} Plot3D;
extern Plot3D *new_Plot3D(FrameBuffer *frame, double xmin, double ymin, double zmin,
double xmax, double ymax, double zmax);
extern void delete_Plot3D(Plot3D *p3);
extern Plot3D *Plot3D_copy(Plot3D *p3);
extern void Plot3D_clear(Plot3D *p3, Pixel Color);
extern void Plot3D_perspective(Plot3D *p3, double fovy, double znear, double zfar);
extern void Plot3D_ortho(Plot3D *p3, double left, double right, double top, double bottom);
extern void Plot3D_lookat(Plot3D *p3, double z);
extern void Plot3D_autoperspective(Plot3D *p3, double fovy);
extern void Plot3D_autoortho(Plot3D *p3);
extern void Plot3D_rotx(Plot3D *p3, double deg);
extern void Plot3D_roty(Plot3D *p3, double deg);
extern void Plot3D_rotz(Plot3D *p3, double deg);
extern void Plot3D_rotl(Plot3D *p3, double deg);
extern void Plot3D_rotr(Plot3D *p3, double deg);
extern void Plot3D_rotd(Plot3D *p3, double deg);
extern void Plot3D_rotu(Plot3D *p3, double deg);
extern void Plot3D_rotc(Plot3D *p3, double deg);
extern void Plot3D_zoom(Plot3D *p3, double percent);
extern void Plot3D_left(Plot3D *p3, double percent);
extern void Plot3D_right(Plot3D *p3, double percent);
extern void Plot3D_down(Plot3D *p3, double percent);
extern void Plot3D_up(Plot3D *p3, double percent);
extern void Plot3D_center(Plot3D *p3, double cx, double cy);
extern void Plot3D_plot(Plot3D *p3, double x, double y, double z, Pixel Color);
extern void Plot3D_setview(Plot3D *p3, int vxmin, int vymin, int vxmax, int vymax);
extern void Plot3D_start(Plot3D *p3);
extern void Plot3D_line(Plot3D *p3, double x1, double y1, double z1,
double x2, double y2, double z2, Pixel color);
extern void Plot3D_triangle(Plot3D *p3, double x1, double y1, double z1,
double x2, double y2, double z2,
double x3, double y3, double z3, Pixel color);
extern void Plot3D_solidtriangle(Plot3D *p3, double x1, double y1, double z1,
double x2, double y2, double z2,
double x3, double y3, double z3, Pixel color);
extern void Plot3D_interptriangle(Plot3D *p3,
double x1, double y1, double z1, Pixel c1,
double x2, double y2, double z2, Pixel c2,
double x3, double y3, double z3, Pixel c3);
extern void Plot3D_quad(Plot3D *p3, double x1, double y1, double z1,
double x2, double y2, double z2,
double x3, double y3, double z3,
double x4, double y4, double z4,
Pixel color);
extern void Plot3D_solidquad(Plot3D *p3, double x1, double y1, double z1,
double x2, double y2, double z2,
double x3, double y3, double z3,
double x4, double y4, double z4,
Pixel color);
extern void Plot3D_interpquad(Plot3D *p3, double x1, double y1, double z1, Pixel c1,
double x2, double y2, double z2, Pixel c2,
double x3, double y3, double z3, Pixel c3,
double x4, double y4, double z4, Pixel c4);
extern void Plot3D_solidsphere(Plot3D *p3, double x, double y, double z, double radius,Pixel c);
extern void Plot3D_outlinesphere(Plot3D *p3, double x, double y, double z, double radius,Pixel c, Pixel bc);
extern PixMap PixMap_SQUARE;
extern PixMap PixMap_TRIANGLE;
extern PixMap PixMap_CROSS;
#endif
#define GIFPLOT_H
|
