117 lines
2.4 KiB
C
117 lines
2.4 KiB
C
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/*
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warp1.c
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_______________
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*/
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#include <stdio.h>
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#include <math.h>
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#include "../tthimage.h"
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/*::------------------------------------------------------------------::*/
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/*
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* Rotation d'image. le parametre 'angle' est en degres.
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*/
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int
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Image_center_rotate(Image_Desc *src, Image_Desc *dst, double angle)
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{
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int xs, ys, xd, yd;
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double arad, fxs, fys, fxd, fyd;
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double sincalc, coscalc;
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int mx, my;
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int r, g, b;
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#if DEBUG_LEVEL > 1
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fprintf(stderr, "%s : work in progress...\n", __func__);
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#endif
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arad = angle/180*M_PI;
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mx = dst->width / 2;
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my = dst->height / 2;
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sincalc = sin(arad);
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coscalc = cos(arad);
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for (xd=0; xd<dst->width; xd++)
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{
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fxd = (double)(xd-mx);
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for (yd=0; yd<dst->height; yd++)
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{
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fyd = (double)(yd-my);
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fxs = fxd * coscalc - fyd * sincalc;
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fys = fxd * sincalc + fyd * coscalc;
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xs = (int)fxs + mx;
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ys = (int)fys + my;
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if (xs>=0 && xs<src->width && ys>=0 && ys<src->height)
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{
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/* Image_getRGB(src, xs, ys, &r, &g, &b); */
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r = (src->Rpix[ys])[xs];
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g = (src->Gpix[ys])[xs];
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b = (src->Bpix[ys])[xs];
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}
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else
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{ r = g = b = 142; }
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/* Image_plotRGB(dst, xd, yd, r, g, b); */
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(dst->Rpix[yd])[xd] = r;
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(dst->Gpix[yd])[xd] = g;
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(dst->Bpix[yd])[xd] = b;
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}
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}
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return FUNC_IS_BETA;
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}
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/*::------------------------------------------------------------------::*/
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/*
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* La meme chose, en gros...
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* Sauf qu'on pourrait theoriquement choisir la position du
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* point de rotation.
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*
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* reste plus qu'<EFBFBD> coder...
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*/
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int
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Image_center_rotate_xy(Image_Desc *src, Image_Desc *dst, double angle,
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double x, double y)
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{
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int foo, xd, yd;
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double arad, fxs, fys, fxd, fyd;
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double sincalc, coscalc;
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int mx, my;
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#if DEBUG_LEVEL
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fprintf(stderr, "Center Rotate XY: work in progress...\n");
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#endif
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fprintf(stderr, "%s on %p at %g,%g\n", __func__, src, x, y);
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arad = angle/180*M_PI;
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mx = dst->width / 2;
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my = dst->height / 2;
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sincalc = sin(arad);
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coscalc = cos(arad);
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fxs = fys = 0.0; /* ? hein ? */
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foo = 0;
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for (xd=0; xd<dst->width; xd++)
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{
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fxd = (double)(xd-mx);
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for (yd=0; yd<dst->height; yd++)
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{
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fyd = (double)(yd-my);
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}
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}
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/* MAIS C'EST PAS ENCORE FINI CE TRUC ? */
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/* 4 mai 2007: ben non, ya rien :) */
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return FULL_NUCKED;
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}
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/*::------------------------------------------------------------------::*/
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/*
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* voir aussi les modules scale.c et warp0.c
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*/
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/*::------------------------------------------------------------------::*/
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