742 lines
21 KiB
C
742 lines
21 KiB
C
|
/*************************************************/
|
||
|
|
/* Compute a preview image and preview wireframe */
|
||
|
|
/*************************************************/
|
||
|
|
|
||
|
|
#include "config.h"
|
||
|
|
|
||
|
|
#include <gtk/gtk.h>
|
||
|
|
|
||
|
|
#include <libpika/pika.h>
|
||
|
|
#include <libpika/pikaui.h>
|
||
|
|
|
||
|
|
#include "map-object-main.h"
|
||
|
|
#include "map-object-ui.h"
|
||
|
|
#include "map-object-image.h"
|
||
|
|
#include "map-object-apply.h"
|
||
|
|
#include "map-object-shade.h"
|
||
|
|
#include "map-object-preview.h"
|
||
|
|
|
||
|
|
|
||
|
|
gdouble mat[3][4];
|
||
|
|
gint lightx, lighty;
|
||
|
|
|
||
|
|
/* Protos */
|
||
|
|
/* ====== */
|
||
|
|
|
||
|
|
static void compute_preview (gint x,
|
||
|
|
gint y,
|
||
|
|
gint w,
|
||
|
|
gint h,
|
||
|
|
gint pw,
|
||
|
|
gint ph);
|
||
|
|
static void draw_light_marker (cairo_t *cr,
|
||
|
|
gint xpos,
|
||
|
|
gint ypos);
|
||
|
|
static void draw_line (cairo_t *cr,
|
||
|
|
gint startx,
|
||
|
|
gint starty,
|
||
|
|
gint pw,
|
||
|
|
gint ph,
|
||
|
|
gdouble cx1,
|
||
|
|
gdouble cy1,
|
||
|
|
gdouble cx2,
|
||
|
|
gdouble cy2,
|
||
|
|
PikaVector3 a,
|
||
|
|
PikaVector3 b);
|
||
|
|
static void draw_wireframe (cairo_t *cr,
|
||
|
|
gint startx,
|
||
|
|
gint starty,
|
||
|
|
gint pw,
|
||
|
|
gint ph);
|
||
|
|
static void draw_preview_wireframe (cairo_t *cr);
|
||
|
|
static void draw_wireframe_plane (cairo_t *cr,
|
||
|
|
gint startx,
|
||
|
|
gint starty,
|
||
|
|
gint pw,
|
||
|
|
gint ph);
|
||
|
|
static void draw_wireframe_sphere (cairo_t *cr,
|
||
|
|
gint startx,
|
||
|
|
gint starty,
|
||
|
|
gint pw,
|
||
|
|
gint ph);
|
||
|
|
static void draw_wireframe_box (cairo_t *cr,
|
||
|
|
gint startx,
|
||
|
|
gint starty,
|
||
|
|
gint pw,
|
||
|
|
gint ph);
|
||
|
|
static void draw_wireframe_cylinder (cairo_t *cr,
|
||
|
|
gint startx,
|
||
|
|
gint starty,
|
||
|
|
gint pw,
|
||
|
|
gint ph);
|
||
|
|
|
||
|
|
/**************************************************************/
|
||
|
|
/* Computes a preview of the rectangle starting at (x,y) with */
|
||
|
|
/* dimensions (w,h), placing the result in preview_RGB_data. */
|
||
|
|
/**************************************************************/
|
||
|
|
|
||
|
|
static void
|
||
|
|
compute_preview (gint x,
|
||
|
|
gint y,
|
||
|
|
gint w,
|
||
|
|
gint h,
|
||
|
|
gint pw,
|
||
|
|
gint ph)
|
||
|
|
{
|
||
|
|
gdouble xpostab[PREVIEW_WIDTH];
|
||
|
|
gdouble ypostab[PREVIEW_HEIGHT];
|
||
|
|
gdouble realw;
|
||
|
|
gdouble realh;
|
||
|
|
PikaVector3 p1, p2;
|
||
|
|
PikaRGB color;
|
||
|
|
PikaRGB lightcheck, darkcheck;
|
||
|
|
gint xcnt, ycnt, f1, f2;
|
||
|
|
guchar r, g, b;
|
||
|
|
glong index = 0;
|
||
|
|
|
||
|
|
init_compute ();
|
||
|
|
|
||
|
|
if (! preview_surface)
|
||
|
|
return;
|
||
|
|
|
||
|
|
p1 = int_to_pos (x, y);
|
||
|
|
p2 = int_to_pos (x + w, y + h);
|
||
|
|
|
||
|
|
/* First, compute the linear mapping (x,y,x+w,y+h) to (0,0,pw,ph) */
|
||
|
|
/* ============================================================== */
|
||
|
|
|
||
|
|
realw = (p2.x - p1.x);
|
||
|
|
realh = (p2.y - p1.y);
|
||
|
|
|
||
|
|
for (xcnt = 0; xcnt < pw; xcnt++)
|
||
|
|
xpostab[xcnt] = p1.x + realw * ((gdouble) xcnt / (gdouble) pw);
|
||
|
|
|
||
|
|
for (ycnt = 0; ycnt < ph; ycnt++)
|
||
|
|
ypostab[ycnt] = p1.y + realh * ((gdouble) ycnt / (gdouble) ph);
|
||
|
|
|
||
|
|
/* Compute preview using the offset tables */
|
||
|
|
/* ======================================= */
|
||
|
|
|
||
|
|
if (mapvals.transparent_background == TRUE)
|
||
|
|
{
|
||
|
|
pika_rgba_set (&background, 0.0, 0.0, 0.0, 0.0);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
pika_context_get_background (&background);
|
||
|
|
pika_rgb_set_alpha (&background, 1.0);
|
||
|
|
}
|
||
|
|
|
||
|
|
pika_rgba_set (&lightcheck,
|
||
|
|
PIKA_CHECK_LIGHT, PIKA_CHECK_LIGHT, PIKA_CHECK_LIGHT, 1.0);
|
||
|
|
pika_rgba_set (&darkcheck,
|
||
|
|
PIKA_CHECK_DARK, PIKA_CHECK_DARK, PIKA_CHECK_DARK, 1.0);
|
||
|
|
pika_vector3_set (&p2, -1.0, -1.0, 0.0);
|
||
|
|
|
||
|
|
cairo_surface_flush (preview_surface);
|
||
|
|
|
||
|
|
for (ycnt = 0; ycnt < ph; ycnt++)
|
||
|
|
{
|
||
|
|
index = ycnt * preview_rgb_stride;
|
||
|
|
for (xcnt = 0; xcnt < pw; xcnt++)
|
||
|
|
{
|
||
|
|
p1.x = xpostab[xcnt];
|
||
|
|
p1.y = ypostab[ycnt];
|
||
|
|
|
||
|
|
p2 = p1;
|
||
|
|
color = (* get_ray_color) (&p1);
|
||
|
|
|
||
|
|
if (color.a < 1.0)
|
||
|
|
{
|
||
|
|
f1 = ((xcnt % 32) < 16);
|
||
|
|
f2 = ((ycnt % 32) < 16);
|
||
|
|
f1 = f1 ^ f2;
|
||
|
|
|
||
|
|
if (f1)
|
||
|
|
{
|
||
|
|
if (color.a == 0.0)
|
||
|
|
color = lightcheck;
|
||
|
|
else
|
||
|
|
pika_rgb_composite (&color, &lightcheck,
|
||
|
|
PIKA_RGB_COMPOSITE_BEHIND);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
if (color.a == 0.0)
|
||
|
|
color = darkcheck;
|
||
|
|
else
|
||
|
|
pika_rgb_composite (&color, &darkcheck,
|
||
|
|
PIKA_RGB_COMPOSITE_BEHIND);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
pika_rgb_get_uchar (&color, &r, &g, &b);
|
||
|
|
PIKA_CAIRO_RGB24_SET_PIXEL((preview_rgb_data + index), r, g, b);
|
||
|
|
index += 4;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
cairo_surface_mark_dirty (preview_surface);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*************************************************/
|
||
|
|
/* Check if the given position is within the */
|
||
|
|
/* light marker. Return TRUE if so, FALSE if not */
|
||
|
|
/*************************************************/
|
||
|
|
|
||
|
|
gint
|
||
|
|
check_light_hit (gint xpos,
|
||
|
|
gint ypos)
|
||
|
|
{
|
||
|
|
gdouble dx, dy, r;
|
||
|
|
|
||
|
|
if (mapvals.lightsource.type == POINT_LIGHT)
|
||
|
|
{
|
||
|
|
dx = (gdouble) lightx - xpos;
|
||
|
|
dy = (gdouble) lighty - ypos;
|
||
|
|
r = sqrt (dx * dx + dy * dy) + 0.5;
|
||
|
|
|
||
|
|
if ((gint) r > 7)
|
||
|
|
return FALSE;
|
||
|
|
else
|
||
|
|
return TRUE;
|
||
|
|
}
|
||
|
|
|
||
|
|
return FALSE;
|
||
|
|
}
|
||
|
|
|
||
|
|
/****************************************/
|
||
|
|
/* Draw a marker to show light position */
|
||
|
|
/****************************************/
|
||
|
|
|
||
|
|
static void
|
||
|
|
draw_light_marker (cairo_t *cr,
|
||
|
|
gint xpos,
|
||
|
|
gint ypos)
|
||
|
|
{
|
||
|
|
GdkRGBA color;
|
||
|
|
|
||
|
|
if (mapvals.lightsource.type != POINT_LIGHT)
|
||
|
|
return;
|
||
|
|
|
||
|
|
cairo_set_line_width (cr, 1.0);
|
||
|
|
|
||
|
|
color.red = 0.0;
|
||
|
|
color.green = 0.2;
|
||
|
|
color.blue = 1.0;
|
||
|
|
color.alpha = 1.0;
|
||
|
|
gdk_cairo_set_source_rgba (cr, &color);
|
||
|
|
|
||
|
|
lightx = xpos;
|
||
|
|
lighty = ypos;
|
||
|
|
|
||
|
|
cairo_arc (cr, lightx, lighty, 7, 0, 2 * G_PI);
|
||
|
|
cairo_fill (cr);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
draw_lights (cairo_t *cr,
|
||
|
|
gint startx,
|
||
|
|
gint starty,
|
||
|
|
gint pw,
|
||
|
|
gint ph)
|
||
|
|
{
|
||
|
|
gdouble dxpos, dypos;
|
||
|
|
gint xpos, ypos;
|
||
|
|
|
||
|
|
pika_vector_3d_to_2d (startx, starty, pw, ph,
|
||
|
|
&dxpos, &dypos, &mapvals.viewpoint,
|
||
|
|
&mapvals.lightsource.position);
|
||
|
|
xpos = RINT (dxpos);
|
||
|
|
ypos = RINT (dypos);
|
||
|
|
|
||
|
|
if (xpos >= 0 && xpos <= PREVIEW_WIDTH &&
|
||
|
|
ypos >= 0 && ypos <= PREVIEW_HEIGHT)
|
||
|
|
{
|
||
|
|
draw_light_marker (cr, xpos, ypos);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*************************************************/
|
||
|
|
/* Update light position given new screen coords */
|
||
|
|
/*************************************************/
|
||
|
|
|
||
|
|
void
|
||
|
|
update_light (gint xpos,
|
||
|
|
gint ypos)
|
||
|
|
{
|
||
|
|
gint startx, starty, pw, ph;
|
||
|
|
|
||
|
|
pw = PREVIEW_WIDTH * mapvals.zoom;
|
||
|
|
ph = PREVIEW_HEIGHT * mapvals.zoom;
|
||
|
|
startx = (PREVIEW_WIDTH - pw) / 2;
|
||
|
|
starty = (PREVIEW_HEIGHT - ph) / 2;
|
||
|
|
|
||
|
|
pika_vector_2d_to_3d (startx, starty, pw, ph, xpos, ypos,
|
||
|
|
&mapvals.viewpoint, &mapvals.lightsource.position);
|
||
|
|
|
||
|
|
gtk_widget_queue_draw (previewarea);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**************************/
|
||
|
|
/* Compute preview image. */
|
||
|
|
/**************************/
|
||
|
|
|
||
|
|
void
|
||
|
|
compute_preview_image (void)
|
||
|
|
{
|
||
|
|
GdkDisplay *display = gtk_widget_get_display (previewarea);
|
||
|
|
GdkCursor *cursor;
|
||
|
|
gint pw, ph;
|
||
|
|
|
||
|
|
pw = PREVIEW_WIDTH * mapvals.zoom;
|
||
|
|
ph = PREVIEW_HEIGHT * mapvals.zoom;
|
||
|
|
|
||
|
|
cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
|
||
|
|
gdk_window_set_cursor (gtk_widget_get_window (previewarea), cursor);
|
||
|
|
g_object_unref (cursor);
|
||
|
|
|
||
|
|
compute_preview (0, 0, width - 1, height - 1, pw, ph);
|
||
|
|
|
||
|
|
cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
|
||
|
|
gdk_window_set_cursor(gtk_widget_get_window (previewarea), cursor);
|
||
|
|
g_object_unref (cursor);
|
||
|
|
}
|
||
|
|
|
||
|
|
gboolean
|
||
|
|
preview_draw (GtkWidget *widget,
|
||
|
|
cairo_t *cr)
|
||
|
|
{
|
||
|
|
gint startx, starty, pw, ph;
|
||
|
|
|
||
|
|
pw = PREVIEW_WIDTH * mapvals.zoom;
|
||
|
|
ph = PREVIEW_HEIGHT * mapvals.zoom;
|
||
|
|
startx = (PREVIEW_WIDTH - pw) / 2;
|
||
|
|
starty = (PREVIEW_HEIGHT - ph) / 2;
|
||
|
|
|
||
|
|
cairo_set_source_surface (cr, preview_surface, startx, starty);
|
||
|
|
cairo_rectangle (cr, startx, starty, pw, ph);
|
||
|
|
cairo_clip (cr);
|
||
|
|
|
||
|
|
cairo_paint (cr);
|
||
|
|
|
||
|
|
cairo_reset_clip (cr);
|
||
|
|
|
||
|
|
if (mapvals.showgrid)
|
||
|
|
draw_preview_wireframe (cr);
|
||
|
|
|
||
|
|
cairo_reset_clip (cr);
|
||
|
|
draw_lights (cr, startx, starty, pw, ph);
|
||
|
|
|
||
|
|
return FALSE;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**************************/
|
||
|
|
/* Draw preview wireframe */
|
||
|
|
/**************************/
|
||
|
|
|
||
|
|
void
|
||
|
|
draw_preview_wireframe (cairo_t *cr)
|
||
|
|
{
|
||
|
|
gint startx, starty, pw, ph;
|
||
|
|
|
||
|
|
pw = PREVIEW_WIDTH * mapvals.zoom;
|
||
|
|
ph = PREVIEW_HEIGHT * mapvals.zoom;
|
||
|
|
startx = (PREVIEW_WIDTH - pw) / 2;
|
||
|
|
starty = (PREVIEW_HEIGHT - ph) / 2;
|
||
|
|
|
||
|
|
draw_wireframe (cr, startx, starty, pw, ph);
|
||
|
|
}
|
||
|
|
|
||
|
|
/****************************/
|
||
|
|
/* Draw a wireframe preview */
|
||
|
|
/****************************/
|
||
|
|
|
||
|
|
void
|
||
|
|
draw_wireframe (cairo_t *cr,
|
||
|
|
gint startx,
|
||
|
|
gint starty,
|
||
|
|
gint pw,
|
||
|
|
gint ph)
|
||
|
|
{
|
||
|
|
cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
|
||
|
|
switch (mapvals.maptype)
|
||
|
|
{
|
||
|
|
case MAP_PLANE:
|
||
|
|
draw_wireframe_plane (cr, startx, starty, pw, ph);
|
||
|
|
break;
|
||
|
|
case MAP_SPHERE:
|
||
|
|
draw_wireframe_sphere (cr, startx, starty, pw, ph);
|
||
|
|
break;
|
||
|
|
case MAP_BOX:
|
||
|
|
draw_wireframe_box (cr, startx, starty, pw, ph);
|
||
|
|
break;
|
||
|
|
case MAP_CYLINDER:
|
||
|
|
draw_wireframe_cylinder (cr, startx, starty, pw, ph);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
draw_wireframe_plane (cairo_t *cr,
|
||
|
|
gint startx,
|
||
|
|
gint starty,
|
||
|
|
gint pw,
|
||
|
|
gint ph)
|
||
|
|
{
|
||
|
|
PikaVector3 v1, v2, a, b, c, d, dir1, dir2;
|
||
|
|
gint cnt;
|
||
|
|
gdouble x1, y1, x2, y2, fac;
|
||
|
|
|
||
|
|
cairo_rectangle (cr, startx, starty, pw, ph);
|
||
|
|
cairo_clip (cr);
|
||
|
|
|
||
|
|
/* Find rotated box corners */
|
||
|
|
/* ======================== */
|
||
|
|
|
||
|
|
pika_vector3_set (&v1, 0.5, 0.0, 0.0);
|
||
|
|
pika_vector3_set (&v2, 0.0, 0.5, 0.0);
|
||
|
|
|
||
|
|
pika_vector3_rotate (&v1,
|
||
|
|
pika_deg_to_rad (mapvals.alpha),
|
||
|
|
pika_deg_to_rad (mapvals.beta),
|
||
|
|
pika_deg_to_rad (mapvals.gamma));
|
||
|
|
|
||
|
|
pika_vector3_rotate (&v2,
|
||
|
|
pika_deg_to_rad (mapvals.alpha),
|
||
|
|
pika_deg_to_rad (mapvals.beta),
|
||
|
|
pika_deg_to_rad (mapvals.gamma));
|
||
|
|
|
||
|
|
dir1 = v1; pika_vector3_normalize (&dir1);
|
||
|
|
dir2 = v2; pika_vector3_normalize (&dir2);
|
||
|
|
|
||
|
|
fac = 1.0 / (gdouble) WIRESIZE;
|
||
|
|
|
||
|
|
pika_vector3_mul (&dir1, fac);
|
||
|
|
pika_vector3_mul (&dir2, fac);
|
||
|
|
|
||
|
|
pika_vector3_add (&a, &mapvals.position, &v1);
|
||
|
|
pika_vector3_sub (&b, &a, &v2);
|
||
|
|
pika_vector3_add (&a, &a, &v2);
|
||
|
|
pika_vector3_sub (&d, &mapvals.position, &v1);
|
||
|
|
pika_vector3_sub (&d, &d, &v2);
|
||
|
|
|
||
|
|
c = b;
|
||
|
|
|
||
|
|
for (cnt = 0; cnt <= WIRESIZE; cnt++)
|
||
|
|
{
|
||
|
|
pika_vector_3d_to_2d (startx, starty, pw, ph,
|
||
|
|
&x1, &y1, &mapvals.viewpoint, &a);
|
||
|
|
pika_vector_3d_to_2d (startx, starty, pw, ph,
|
||
|
|
&x2, &y2, &mapvals.viewpoint, &b);
|
||
|
|
|
||
|
|
cairo_move_to (cr, RINT (x1) + 0.5, RINT (y1) + 0.5);
|
||
|
|
cairo_line_to (cr, RINT (x2) + 0.5, RINT (y2) + 0.5);
|
||
|
|
|
||
|
|
pika_vector_3d_to_2d (startx, starty, pw, ph,
|
||
|
|
&x1, &y1, &mapvals.viewpoint, &c);
|
||
|
|
pika_vector_3d_to_2d (startx, starty, pw, ph,
|
||
|
|
&x2, &y2, &mapvals.viewpoint, &d);
|
||
|
|
|
||
|
|
cairo_move_to (cr, RINT (x1) + 0.5, RINT (y1) + 0.5);
|
||
|
|
cairo_line_to (cr, RINT (x2) + 0.5, RINT (y2) + 0.5);
|
||
|
|
|
||
|
|
pika_vector3_sub (&a, &a, &dir1);
|
||
|
|
pika_vector3_sub (&b, &b, &dir1);
|
||
|
|
pika_vector3_add (&c, &c, &dir2);
|
||
|
|
pika_vector3_add (&d, &d, &dir2);
|
||
|
|
}
|
||
|
|
|
||
|
|
cairo_set_line_width (cr, 3.0);
|
||
|
|
cairo_stroke_preserve (cr);
|
||
|
|
cairo_set_line_width (cr, 1.0);
|
||
|
|
cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
|
||
|
|
cairo_stroke (cr);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
draw_wireframe_sphere (cairo_t *cr,
|
||
|
|
gint startx,
|
||
|
|
gint starty,
|
||
|
|
gint pw,
|
||
|
|
gint ph)
|
||
|
|
{
|
||
|
|
PikaVector3 p[2 * (WIRESIZE + 5)];
|
||
|
|
gint cnt, cnt2;
|
||
|
|
gdouble x1, y1, x2, y2, twopifac;
|
||
|
|
|
||
|
|
cairo_rectangle (cr, startx, starty, pw, ph);
|
||
|
|
cairo_clip (cr);
|
||
|
|
|
||
|
|
/* Compute wireframe points */
|
||
|
|
/* ======================== */
|
||
|
|
|
||
|
|
twopifac = (2.0 * G_PI) / WIRESIZE;
|
||
|
|
|
||
|
|
for (cnt = 0; cnt < WIRESIZE; cnt++)
|
||
|
|
{
|
||
|
|
p[cnt].x = mapvals.radius * cos ((gdouble) cnt * twopifac);
|
||
|
|
p[cnt].y = 0.0;
|
||
|
|
p[cnt].z = mapvals.radius * sin ((gdouble) cnt * twopifac);
|
||
|
|
pika_vector3_rotate (&p[cnt],
|
||
|
|
pika_deg_to_rad (mapvals.alpha),
|
||
|
|
pika_deg_to_rad (mapvals.beta),
|
||
|
|
pika_deg_to_rad (mapvals.gamma));
|
||
|
|
pika_vector3_add (&p[cnt], &p[cnt], &mapvals.position);
|
||
|
|
}
|
||
|
|
|
||
|
|
p[cnt] = p[0];
|
||
|
|
|
||
|
|
for (cnt = WIRESIZE + 1; cnt < 2 * WIRESIZE + 1; cnt++)
|
||
|
|
{
|
||
|
|
p[cnt].x = mapvals.radius * cos ((gdouble) (cnt-(WIRESIZE+1))*twopifac);
|
||
|
|
p[cnt].y = mapvals.radius * sin ((gdouble) (cnt-(WIRESIZE+1))*twopifac);
|
||
|
|
p[cnt].z = 0.0;
|
||
|
|
pika_vector3_rotate (&p[cnt],
|
||
|
|
pika_deg_to_rad (mapvals.alpha),
|
||
|
|
pika_deg_to_rad (mapvals.beta),
|
||
|
|
pika_deg_to_rad (mapvals.gamma));
|
||
|
|
pika_vector3_add (&p[cnt], &p[cnt], &mapvals.position);
|
||
|
|
}
|
||
|
|
|
||
|
|
p[cnt] = p[WIRESIZE+1];
|
||
|
|
cnt++;
|
||
|
|
cnt2 = cnt;
|
||
|
|
|
||
|
|
/* Find rotated axis */
|
||
|
|
/* ================= */
|
||
|
|
|
||
|
|
pika_vector3_set (&p[cnt], 0.0, -0.35, 0.0);
|
||
|
|
pika_vector3_rotate (&p[cnt],
|
||
|
|
pika_deg_to_rad (mapvals.alpha),
|
||
|
|
pika_deg_to_rad (mapvals.beta),
|
||
|
|
pika_deg_to_rad (mapvals.gamma));
|
||
|
|
p[cnt+1] = mapvals.position;
|
||
|
|
|
||
|
|
pika_vector3_set (&p[cnt+2], 0.0, 0.0, -0.35);
|
||
|
|
pika_vector3_rotate (&p[cnt+2],
|
||
|
|
pika_deg_to_rad (mapvals.alpha),
|
||
|
|
pika_deg_to_rad (mapvals.beta),
|
||
|
|
pika_deg_to_rad (mapvals.gamma));
|
||
|
|
p[cnt+3] = mapvals.position;
|
||
|
|
|
||
|
|
p[cnt + 4] = p[cnt];
|
||
|
|
pika_vector3_mul (&p[cnt + 4], -1.0);
|
||
|
|
p[cnt + 5] = p[cnt + 1];
|
||
|
|
|
||
|
|
pika_vector3_add (&p[cnt], &p[cnt], &mapvals.position);
|
||
|
|
pika_vector3_add (&p[cnt + 2], &p[cnt + 2], &mapvals.position);
|
||
|
|
pika_vector3_add (&p[cnt + 4], &p[cnt + 4], &mapvals.position);
|
||
|
|
|
||
|
|
/* Draw the circles (equator and zero meridian) */
|
||
|
|
/* ============================================ */
|
||
|
|
|
||
|
|
for (cnt = 0; cnt < cnt2 - 1; cnt++)
|
||
|
|
{
|
||
|
|
if (p[cnt].z > mapvals.position.z && p[cnt + 1].z > mapvals.position.z)
|
||
|
|
{
|
||
|
|
pika_vector_3d_to_2d (startx, starty, pw, ph,
|
||
|
|
&x1, &y1, &mapvals.viewpoint, &p[cnt]);
|
||
|
|
pika_vector_3d_to_2d (startx, starty, pw, ph,
|
||
|
|
&x2, &y2, &mapvals.viewpoint, &p[cnt + 1]);
|
||
|
|
|
||
|
|
cairo_move_to (cr, (gint) (x1 + 0.5) + 0.5, (gint) (y1 + 0.5) + 0.5);
|
||
|
|
cairo_line_to (cr, (gint) (x2 + 0.5) + 0.5, (gint) (y2 + 0.5) + 0.5);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Draw the axis (pole to pole and center to zero meridian) */
|
||
|
|
/* ======================================================== */
|
||
|
|
|
||
|
|
for (cnt = 0; cnt < 3; cnt++)
|
||
|
|
{
|
||
|
|
pika_vector_3d_to_2d (startx, starty, pw, ph,
|
||
|
|
&x1, &y1, &mapvals.viewpoint, &p[cnt2]);
|
||
|
|
pika_vector_3d_to_2d (startx, starty, pw, ph,
|
||
|
|
&x2, &y2, &mapvals.viewpoint, &p[cnt2 + 1]);
|
||
|
|
|
||
|
|
cairo_move_to (cr, RINT (x1) + 0.5, RINT (y1) + 0.5);
|
||
|
|
cairo_line_to (cr, RINT (x2) + 0.5, RINT (y2) + 0.5);
|
||
|
|
|
||
|
|
cnt2 += 2;
|
||
|
|
}
|
||
|
|
|
||
|
|
cairo_set_line_width (cr, 3.0);
|
||
|
|
cairo_stroke_preserve (cr);
|
||
|
|
cairo_set_line_width (cr, 1.0);
|
||
|
|
cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
|
||
|
|
cairo_stroke (cr);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
draw_line (cairo_t *cr,
|
||
|
|
gint startx,
|
||
|
|
gint starty,
|
||
|
|
gint pw,
|
||
|
|
gint ph,
|
||
|
|
gdouble cx1,
|
||
|
|
gdouble cy1,
|
||
|
|
gdouble cx2,
|
||
|
|
gdouble cy2,
|
||
|
|
PikaVector3 a,
|
||
|
|
PikaVector3 b)
|
||
|
|
{
|
||
|
|
gdouble x1, y1, x2, y2;
|
||
|
|
|
||
|
|
pika_vector_3d_to_2d (startx, starty, pw, ph,
|
||
|
|
&x1, &y1, &mapvals.viewpoint, &a);
|
||
|
|
pika_vector_3d_to_2d (startx, starty, pw, ph,
|
||
|
|
&x2, &y2, &mapvals.viewpoint, &b);
|
||
|
|
|
||
|
|
cairo_move_to (cr, RINT (x1) + 0.5, RINT (y1) + 0.5);
|
||
|
|
cairo_line_to (cr, RINT (x2) + 0.5, RINT (y2) + 0.5);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
draw_wireframe_box (cairo_t *cr,
|
||
|
|
gint startx,
|
||
|
|
gint starty,
|
||
|
|
gint pw,
|
||
|
|
gint ph)
|
||
|
|
{
|
||
|
|
PikaVector3 p[8], tmp, scale;
|
||
|
|
gint i;
|
||
|
|
gdouble cx1, cy1, cx2, cy2;
|
||
|
|
|
||
|
|
cairo_rectangle (cr, startx, starty, pw, ph);
|
||
|
|
cairo_clip (cr);
|
||
|
|
|
||
|
|
/* Compute wireframe points */
|
||
|
|
/* ======================== */
|
||
|
|
|
||
|
|
init_compute ();
|
||
|
|
|
||
|
|
scale = mapvals.scale;
|
||
|
|
pika_vector3_mul (&scale, 0.5);
|
||
|
|
|
||
|
|
pika_vector3_set (&p[0], -scale.x, -scale.y, scale.z);
|
||
|
|
pika_vector3_set (&p[1], scale.x, -scale.y, scale.z);
|
||
|
|
pika_vector3_set (&p[2], scale.x, scale.y, scale.z);
|
||
|
|
pika_vector3_set (&p[3], -scale.x, scale.y, scale.z);
|
||
|
|
|
||
|
|
pika_vector3_set (&p[4], -scale.x, -scale.y, -scale.z);
|
||
|
|
pika_vector3_set (&p[5], scale.x, -scale.y, -scale.z);
|
||
|
|
pika_vector3_set (&p[6], scale.x, scale.y, -scale.z);
|
||
|
|
pika_vector3_set (&p[7], -scale.x, scale.y, -scale.z);
|
||
|
|
|
||
|
|
/* Rotate and translate points */
|
||
|
|
/* =========================== */
|
||
|
|
|
||
|
|
for (i = 0; i < 8; i++)
|
||
|
|
{
|
||
|
|
vecmulmat (&tmp, &p[i], rotmat);
|
||
|
|
pika_vector3_add (&p[i], &tmp, &mapvals.position);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Draw the box */
|
||
|
|
/* ============ */
|
||
|
|
|
||
|
|
cx1 = (gdouble) startx;
|
||
|
|
cy1 = (gdouble) starty;
|
||
|
|
cx2 = cx1 + (gdouble) pw;
|
||
|
|
cy2 = cy1 + (gdouble) ph;
|
||
|
|
|
||
|
|
draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[0],p[1]);
|
||
|
|
draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[1],p[2]);
|
||
|
|
draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[2],p[3]);
|
||
|
|
draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[3],p[0]);
|
||
|
|
|
||
|
|
draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[4],p[5]);
|
||
|
|
draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[5],p[6]);
|
||
|
|
draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[6],p[7]);
|
||
|
|
draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[7],p[4]);
|
||
|
|
|
||
|
|
draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[0],p[4]);
|
||
|
|
draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[1],p[5]);
|
||
|
|
draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[2],p[6]);
|
||
|
|
draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[3],p[7]);
|
||
|
|
|
||
|
|
cairo_set_line_width (cr, 3.0);
|
||
|
|
cairo_stroke_preserve (cr);
|
||
|
|
cairo_set_line_width (cr, 1.0);
|
||
|
|
cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
|
||
|
|
cairo_stroke (cr);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
draw_wireframe_cylinder (cairo_t *cr,
|
||
|
|
gint startx,
|
||
|
|
gint starty,
|
||
|
|
gint pw,
|
||
|
|
gint ph)
|
||
|
|
{
|
||
|
|
PikaVector3 p[2*8], a, axis, scale;
|
||
|
|
gint i;
|
||
|
|
gdouble cx1, cy1, cx2, cy2;
|
||
|
|
gfloat m[16], l, angle;
|
||
|
|
|
||
|
|
cairo_rectangle (cr, startx, starty, pw, ph);
|
||
|
|
cairo_clip (cr);
|
||
|
|
|
||
|
|
/* Compute wireframe points */
|
||
|
|
/* ======================== */
|
||
|
|
|
||
|
|
init_compute ();
|
||
|
|
|
||
|
|
scale = mapvals.scale;
|
||
|
|
pika_vector3_mul (&scale, 0.5);
|
||
|
|
|
||
|
|
l = mapvals.cylinder_length / 2.0;
|
||
|
|
angle = 0;
|
||
|
|
|
||
|
|
pika_vector3_set (&axis, 0.0, 1.0, 0.0);
|
||
|
|
|
||
|
|
for (i = 0; i < 8; i++)
|
||
|
|
{
|
||
|
|
rotatemat (angle, &axis, m);
|
||
|
|
|
||
|
|
pika_vector3_set (&a, mapvals.cylinder_radius, 0.0, 0.0);
|
||
|
|
|
||
|
|
vecmulmat (&p[i], &a, m);
|
||
|
|
|
||
|
|
p[i+8] = p[i];
|
||
|
|
|
||
|
|
p[i].y += l;
|
||
|
|
p[i+8].y -= l;
|
||
|
|
|
||
|
|
angle += 360.0 / 8.0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Rotate and translate points */
|
||
|
|
/* =========================== */
|
||
|
|
|
||
|
|
for (i = 0; i < 16; i++)
|
||
|
|
{
|
||
|
|
vecmulmat (&a, &p[i], rotmat);
|
||
|
|
pika_vector3_add (&p[i], &a, &mapvals.position);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Draw the box */
|
||
|
|
/* ============ */
|
||
|
|
|
||
|
|
cx1 = (gdouble) startx;
|
||
|
|
cy1 = (gdouble) starty;
|
||
|
|
cx2 = cx1 + (gdouble) pw;
|
||
|
|
cy2 = cy1 + (gdouble) ph;
|
||
|
|
|
||
|
|
for (i = 0; i < 7; i++)
|
||
|
|
{
|
||
|
|
draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[i],p[i+1]);
|
||
|
|
draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[i+8],p[i+9]);
|
||
|
|
draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[i],p[i+8]);
|
||
|
|
}
|
||
|
|
|
||
|
|
draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[7],p[0]);
|
||
|
|
draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[15],p[8]);
|
||
|
|
|
||
|
|
cairo_set_line_width (cr, 3.0);
|
||
|
|
cairo_stroke_preserve (cr);
|
||
|
|
cairo_set_line_width (cr, 1.0);
|
||
|
|
cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
|
||
|
|
cairo_stroke (cr);
|
||
|
|
}
|
