| /* ----------------------------------------------------------------------------- |
| * 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 GIFPLOT_TRANSPARENT 0 |
| #define GIFPLOT_FOREGROUND 1 |
| #define GIFPLOT_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 |
| |
| |
| |
