mirror of
git://projects.qi-hardware.com/ben-scans.git
synced 2024-11-22 09:30:38 +02:00
525e1557ec
- solidify/face.h (face_z0): calculate height of z0 plane - solidify/level.c (draw_image): use face_z0 instead of open-coding the calculation - solidify/overlap.c (draw_image, point): moved per-point processing from draw_image() to point() - solidify/overlap.c (point): show differences between both faces - solidify/solidify.c (usage, main): load both faces - solidify/solidify.c (usage, main): accept distance between faces as third argument
151 lines
3.0 KiB
C
151 lines
3.0 KiB
C
/*
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* level.c - Interactively align a nearly horizontal plane with a face
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*
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* Written 2010 by Werner Almesberger
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* Copyright 2010 by Werner Almesberger
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <math.h>
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#include <gtk/gtk.h>
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#include "array.h"
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#include "face.h"
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#include "level.h"
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#define NEAR 1
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static void draw_image(GtkWidget *widget, struct face *f)
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{
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int x, y, z;
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double z0;
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guchar *rgbbuf, *p;
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rgbbuf = p = calloc(f->sx*f->sy, 3);
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if (!rgbbuf) {
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perror("calloc");
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exit(1);
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}
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for (y = f->sy-1; y >= 0; y--)
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for (x = 0; x != f->sx ; x++) {
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z = get(f->a, x+f->a->min_x, y+f->a->min_y);
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if (z == UNDEF) {
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p += 3;
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continue;
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}
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z0 = face_z0(f, x, y);
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if (fabs(z-z0) < NEAR) {
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*p++ = 255*fabs(z-z0);
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*p++ = 255*fabs(z-z0);
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*p++ = 255;
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continue;
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}
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if (z < z0) {
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z = z > z0-2*NEAR ? 255*(z-z0)/NEAR :
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255.0*(z-z0)/(z0-f->a->min_z);
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*p++ = 255;
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*p++ = z;
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*p++ = z;
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} else {
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z = z < z0+2*NEAR ? 255*(z0-z)/NEAR :
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255.0*(z0-z)/(f->a->max_z-z0);
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*p++ = z;
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*p++ = 255;
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*p++ = z;
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}
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}
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gdk_draw_rgb_image(widget->window,
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widget->style->fg_gc[GTK_STATE_NORMAL],
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0, 0, f->sx, f->sy, GDK_RGB_DITHER_MAX, rgbbuf, f->sx*3);
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free(rgbbuf);
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}
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static void scroll_z(GtkWidget *da, struct face *f, int up)
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{
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if (up) {
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if (f->z_ref < f->a->max_z)
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f->z_ref++;
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} else {
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if (f->z_ref > f->a->min_z)
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f->z_ref--;
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}
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draw_image(da, f);
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}
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static void scroll_xy(GtkWidget *da, struct face *f, int dx, int dy, int up)
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{
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double d;
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d = (double) (up ? 1 : -1)/(dx*dx+dy*dy)/2.0;
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f->fx += d*dx;
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f->fy += d*dy;
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draw_image(da, f);
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}
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static gboolean scroll_event(GtkWidget *widget, GdkEventScroll *event,
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gpointer data)
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{
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GtkWidget *da = gtk_bin_get_child(GTK_BIN(widget));
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struct face *f = data;
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int dx = event->x-f->sx/2;
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int dy = event->y-f->sy/2;
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int center = hypot(dx, dy)/hypot(f->sx, f->sy) < 0.25;
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switch (event->direction) {
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case GDK_SCROLL_UP:
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if (center)
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scroll_z(da, f, 0);
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else
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scroll_xy(da, f, dx, dy, 1);
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break;
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case GDK_SCROLL_DOWN:
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if (center)
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scroll_z(da, f, 1);
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else
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scroll_xy(da, f, dx, dy, 0);
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break;
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default:
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/* ignore */;
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}
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return TRUE;
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}
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static gboolean expose_event(GtkWidget *widget, GdkEventExpose *event,
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gpointer user_data)
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{
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draw_image(widget, user_data);
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return TRUE;
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}
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void level(GtkWidget *canvas, struct face *f)
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{
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GtkWidget *evbox, *da;
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evbox = gtk_event_box_new();
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da = gtk_drawing_area_new();
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gtk_widget_set_size_request(da, f->sx, f->sy);
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gtk_container_add(GTK_CONTAINER(canvas), evbox);
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gtk_container_add(GTK_CONTAINER(evbox), da);
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draw_image(da, f);
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g_signal_connect(G_OBJECT(evbox), "scroll-event",
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G_CALLBACK(scroll_event), f);
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g_signal_connect(G_OBJECT(da), "expose-event",
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G_CALLBACK(expose_event), f);
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}
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