181 lines
3.7 KiB
C
181 lines
3.7 KiB
C
/*
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Bon, c'est tres bien tout c,a mais il faudrait
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faire une page de man pour expliquer comment
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ce machin fonctionne...
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "tga_outils.h"
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#define XMIN 0
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#define YMIN 0
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#define XMAX 4096 /* constant from a 'dddd' */
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#define YMAX 4096 /* constant from a 'dddd' */
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/*::------------------------------------------------------------------::*/
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static Image_Desc *image;
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static RGB_map map;
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static int curX, curY;
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/*::------------------------------------------------------------------::*/
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int initgr(int largeur, int hauteur)
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{
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int foo, r, v, b, dummy;
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if ((image=Image_alloc(largeur, hauteur, 3))==NULL)
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{
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fprintf(stderr, "hu hu, 'man addswap' :)\n");
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exit(3);
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}
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printf("\n\tinitgr %d %d\n", largeur, hauteur);
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for (foo=0; foo<8; foo++)
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{
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printf("\tPal(%d) = ", foo);
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r = foo & 1 ? 255 : 0;
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v = foo & 2 ? 255 : 0;
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b = foo & 4 ? 255 : 0;
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printf("%02X %02X %02X\n", r, v, b);
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map.red[foo] = r;
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map.green[foo] = v;
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map.blue[foo] = b;
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}
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map.nbre = 8;
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return 0;
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}
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/*::------------------------------------------------------------------::*/
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int move(int x, int y)
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{
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#if DEBUG_LEVEL
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printf("\tMOVE %5d %5d\n", x, y);
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#endif
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curX = x; curY = y;
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return 0;
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}
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int draw(int x, int y, int color)
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{
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RGBA rgba;
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int idx;
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#if DEBUG_LEVEL
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printf("\tDRAW %5d %5d to %5d %5d\n", curX, curY, x, y);
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#endif
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idx = color % 8;
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if (idx != color) {
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fprintf(stderr, "%s %s : color %d out of range\n",
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__FILE__, __func__, color);
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}
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rgba.r = map.red[color];
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rgba.g = map.green[color];
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rgba.b = map.blue[color];
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Image_draw_line(image, curX, curY, x, y, &rgba);
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curX = x; curY = y;
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return 0;
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}
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/*::------------------------------------------------------------------::*/
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int endgr(char *filename)
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{
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fprintf(stderr, "saving '%s'\n", filename);
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Image_TGA_save(filename, image, 0);
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return 0;
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}
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/*::------------------------------------------------------------------::*/
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int main(int argc, char *argv[])
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{
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char *filename, *image;
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FILE *fp;
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double x, y, xmin, ymin, xmax, ymax;
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double fx, fy, f, X, Y;
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double xC, yC, XC, YC, c1, c2;
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int v, nbp;
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/*---------- processing command line arguments */
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if (argc<=1) filename = "a.scratch";
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else filename = argv[1];
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if (argc<=2) image = "image.tga";
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else image = argv[2];
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fprintf(stderr, "*** Genplot2 v 1.0.4 [%s] (dwtfywl) 1995,2010 TontonTh \n",
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TGA_OUTILS_VERSION);
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/*----------- giving to the yuser some useless informations --- */
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fprintf(stderr, "hardcoded picsize : %d %d\n", XMAX, YMAX);
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/*----------- opening input file and getting MIN and MAX values */
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if ((fp = fopen(filename, "r"))==NULL)
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{
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perror("fichier d'entree");
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exit(1);
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}
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nbp = 0;
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xmin = 9999999; xmax = -9999999;
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ymin = 9999999; ymax = -9999999;
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while ( fscanf(fp, "%lf %lf %d", &x, &y, &v) == 3 )
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{
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nbp++;
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if (x > xmax) xmax = x;
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if (x < xmin) xmin = x;
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if (y > ymax) ymax = y;
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if (y < ymin) ymin = y;
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}
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fclose(fp);
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if (nbp == 0)
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{
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fprintf(stderr, "omg, I'v found _ZERO_ points for plotting...\n");
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exit(2);
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}
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fprintf(stderr, "Genplot2: found %d points\n", nbp);
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/*---------- computing coefficients (temporary hack !-) */
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fx = (XMAX-XMIN-1)/(xmax-xmin);
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fy = (YMAX-YMIN-1)/(ymax-ymin);
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fprintf(stderr, "\nfc = %12f fy = %12f\n", fx, fy);
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f = (fx<fy?fx:fy);
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xC = 0.5*(xmin+xmax); yC = 0.5*(ymin+ymax);
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XC = 0.5*(XMIN+XMAX); YC = 0.5*(YMIN+YMAX);
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c1 = XC-f*xC; c2 = YC-f*yC;
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fprintf(stderr, "c1 = %12f c2 = %12f\n", c1, c2);
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/*------------- and now, plotting the image ! */
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initgr(XMAX, YMAX);
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fp = fopen(filename, "r");
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puts("");
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while ( fscanf(fp, "%lf %lf %d", &x, &y, &v) == 3 )
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{
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#if DEBUG_LEVEL
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fprintf(stderr, "%12f %12f %d\n", x, y, v);
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#endif
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X = f*x+c1; Y = f*y+c2;
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if (v < 0) move(X, Y);
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else draw(X, Y, v);
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}
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endgr(image);
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return 0;
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}
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