158 lines
3.6 KiB
C
158 lines
3.6 KiB
C
#include "draw.h"
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#include "level.h"
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#include "geometry.h"
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#include <math.h>
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#include <gtk/gtk.h>
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#include <glib/gprintf.h>
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#include <cairo/cairo.h>
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static double scale = 100.0;
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static double xTranslate = 0.0, yTranslate = 0.0;
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static void drawGrid(cairo_t *cr, const RECTANGLE *rect) {
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double depth = log10(scale)-0.75;
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double depth2 = floor(depth);
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double step = pow(0.1, depth2);
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double d;
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int i;
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gchar buffer[10];
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cairo_set_font_size(cr, 10.0/scale);
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for(i = 0; 0.2*(depth-depth2+i-1) < 0.3; i++) {
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d = MIN(0.2*(depth-depth2+i), 0.3);
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cairo_set_source_rgb(cr, d, d, d);
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for(d = rect->x - fmod(rect->x, step) - step; d <= rect->x+rect->width; d+=step) {
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cairo_move_to(cr, d, rect->y);
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cairo_line_to(cr, d, rect->y+rect->height);
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cairo_stroke(cr);
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if(step > 0.2)
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g_snprintf(buffer, sizeof(buffer), "%i", (int)rint(d));
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else
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g_snprintf(buffer, sizeof(buffer), "%.*f", -(int)floor(log10(step*1.1)), d+step/10);
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buffer[sizeof(buffer)-1] = '\0';
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cairo_move_to(cr, d+1/scale, rect->y+11/scale);
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cairo_show_text(cr, buffer);
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}
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for(d = rect->y - fmod(rect->y, step) - step; d <= rect->y+rect->height; d+=step) {
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cairo_move_to(cr, rect->x, d);
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cairo_line_to(cr, rect->x+rect->width, d);
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cairo_stroke(cr);
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if(step > 0.5)
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g_snprintf(buffer, sizeof(buffer), "%i", (int)rint(d));
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else
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g_snprintf(buffer, sizeof(buffer), "%.*f", -(int)floor(log10(step*1.1)), d+step/10);
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buffer[sizeof(buffer)-1] = '\0';
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cairo_move_to(cr, rect->x+3/scale, d+11/scale);
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cairo_show_text(cr, buffer);
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}
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step *= 10;
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}
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}
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static void room2path(cairo_t *cr, const ROOM *room, const RECTANGLE *rect) {
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int i;
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ROOM room2 = {0, NULL};
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// no vertices
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if(room->nVertices == 0) return;
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if(rect)
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simplifyPolygon(room, rect, &room2);
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else
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room2 = *room;
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if(room2.nVertices == 0) return;
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cairo_new_sub_path(cr);
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for(i = 0; i < room2.nVertices; i++) {
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cairo_line_to(cr, room2.vertices[i].x, room2.vertices[i].y);
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}
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cairo_close_path(cr);
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if(rect && room2.vertices)
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free(room2.vertices);
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}
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gboolean drawTopView(GtkWidget *widget, GdkEventExpose *event, gpointer data) {
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VERTEX vertices[4] = {{-1,-1}, {-1,1}, {1,1}, {1,-1}};
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ROOM room = {sizeof(vertices)/sizeof(vertices[0]), vertices};
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LEVEL lvl = {1, &room};
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cairo_t *cr;
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RECTANGLE rect = {-1, -1, widget->allocation.width+2, widget->allocation.height+2};
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int i;
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cr = gdk_cairo_create(widget->window);
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gdk_cairo_region(cr, event->region);
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cairo_clip(cr);
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cairo_translate(cr, getImageWidth()/2-xTranslate, getImageHeight()/2-yTranslate);
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cairo_scale(cr, scale, scale);
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cairo_device_to_user(cr, &rect.x, &rect.y);
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cairo_device_to_user_distance(cr, &rect.width, &rect.height);
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cairo_set_line_width(cr, 1.0/scale);
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cairo_set_line_join(cr, CAIRO_LINE_JOIN_MITER);
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drawGrid(cr, &rect);
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for(i = 0; i < lvl.nRooms; i++)
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room2path(cr, &lvl.rooms[i], &rect);
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cairo_set_source_rgba(cr, 0.0, 0.7, 1.0, 0.3);
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cairo_fill_preserve(cr);
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cairo_set_source_rgba(cr, 0.0, 0.7, 1.0, 0.7);
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cairo_stroke(cr);
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cairo_destroy (cr);
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return FALSE;
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}
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double getScale() {
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return scale;
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}
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void setScale(double s) {
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scale = s;
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}
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double getImageWidth() {
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return 5*scale;
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}
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double getImageHeight() {
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return 5*scale;
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}
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double getXTranslate() {
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return xTranslate;
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}
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void setXTranslate(double x) {
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xTranslate = x;
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}
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double getYTranslate() {
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return yTranslate;
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}
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void setYTranslate(double y) {
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yTranslate = y;
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}
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