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some more util calls for 3d goop. not 100% sure i like it atm, but.. here goes. 

SVN revision: 43411
This commit is contained in:
Carsten Haitzler 2009-11-02 08:52:23 +00:00
parent c645c312d2
commit 2510cad2f0
2 changed files with 175 additions and 7 deletions
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9
legacy/evas/src/lib/Evas.h
View File

@ -855,6 +855,15 @@ extern "C" {
EAPI void evas_map_util_rotate (Evas_Map *m, double degrees, Evas_Coord cx, Evas_Coord cy);
EAPI void evas_map_util_zoom (Evas_Map *m, double zoomx, double zoomy, Evas_Coord cx, Evas_Coord cy);
EAPI void evas_map_util_rotate_3d (Evas_Map *m, double dx, double dy, double dz,
Evas_Coord cx, Evas_Coord cy, Evas_Coord cz,
Evas_Coord px, Evas_Coord py,
Evas_Coord z0, Evas_Coord foc);
EAPI void evas_map_util_perspective (Evas_Map *m,
Evas_Coord px, Evas_Coord py,
Evas_Coord z0, Evas_Coord foc);
EAPI Eina_Bool evas_map_util_clockwise_get (Evas_Map *m);
EAPI Evas_Map *evas_map_new (int count);
EAPI void evas_map_smooth_set (Evas_Map *m, Eina_Bool enabled);

173
legacy/evas/src/lib/canvas/evas_map.c
View File

@ -578,7 +578,7 @@ evas_map_point_color_set(Evas_Map *m, int idx, int r, int g, int b, int a)
EAPI void
evas_map_point_color_get(const Evas_Map *m, int idx, int *r, int *g, int *b, int *a)
{
Evas_Map_Point *p;
const Evas_Map_Point *p;
if (!m) return;
if (idx >= m->count) return;
p = m->points + idx;
@ -616,10 +616,8 @@ evas_map_util_rotate(Evas_Map *m, double degrees, Evas_Coord cx, Evas_Coord cy)
Evas_Map_Point *p, *p_end;
if (!m) return;
if (m->count != 4) return;
p = m->points;
p_end = p + 4;
p_end = p + m->count;
for (; p < p_end; p++)
{
@ -662,10 +660,8 @@ evas_map_util_zoom(Evas_Map *m, double zoomx, double zoomy, Evas_Coord cx, Evas_
Evas_Map_Point *p, *p_end;
if (!m) return;
if (m->count != 4) return;
p = m->points;
p_end = p + 4;
p_end = p + m->count;
for (; p < p_end; p++)
{
@ -681,3 +677,166 @@ evas_map_util_zoom(Evas_Map *m, double zoomx, double zoomy, Evas_Coord cx, Evas_
p->y = y + cy;
}
}
/**
* XXX
*
* xxx
*
* @param m map to change.
* @param dx amount of degrees from 0.0 to 360.0 to rotate.
* @param cx rotation's center horizontal positon.
* @param cy rotation's center vertical positon.
*
* @see evas_map_point_coord_set()
* @see evas_map_util_zoom()
*/
EAPI void
evas_map_util_rotate_3d(Evas_Map *m, double dx, double dy, double dz,
Evas_Coord cx, Evas_Coord cy, Evas_Coord cz,
Evas_Coord px, Evas_Coord py,
Evas_Coord z0, Evas_Coord foc)
{
double rz = (dz * M_PI) / 180.0;
double rx = (dx * M_PI) / 180.0;
double ry = (dy * M_PI) / 180.0;
Evas_Map_Point *p, *p_end;
if (!m) return;
p = m->points;
p_end = p + m->count;
for (; p < p_end; p++)
{
double x, y, z, xx, yy, zz;
x = p->x - cx;
y = p->y - cy;
z = p->z - cz;
if (rz != 0.0)
{
xx = x * cos(rz);
yy = x * sin(rz);
x = xx + (y * cos(rz + M_PI_2));
y = yy + (y * sin(rz + M_PI_2));
}
if (ry != 0.0)
{
xx = x * cos(ry);
zz = x * sin(ry);
x = xx + (z * cos(ry + M_PI_2));
z = zz + (z * sin(ry + M_PI_2));
}
if (rx != 0.0)
{
zz = z * cos(rx);
yy = z * sin(rx);
z = zz + (y * cos(rx + M_PI_2));
y = yy + (y * sin(rx + M_PI_2));
}
x = x + cx;
y = y + cy;
z = z + cz;
if (foc > 0)
{
x = x - px;
y = y - py;
zz = ((z - z0) + foc);
if (zz > 0)
{
x = (x * foc) / zz;
y = (y * foc) / zz;
}
x = px + x;
y = py + y;
}
p->x = x;
p->y = y;
p->z = z;
}
}
/**
* XXX
*
* xxx
*
* @param m map to change.
*/
EAPI void
evas_map_util_perspective(Evas_Map *m,
Evas_Coord px, Evas_Coord py,
Evas_Coord z0, Evas_Coord foc)
{
Evas_Map_Point *p, *p_end;
if (!m) return;
p = m->points;
p_end = p + m->count;
for (; p < p_end; p++)
{
Evas_Coord x, y, zz;
if (foc > 0)
{
x = p->x - px;
y = p->y - py;
zz = ((p->z - z0) + foc);
if (zz > 0)
{
x = (x * foc) / zz;
y = (y * foc) / zz;
}
p->x = px + x;
p->y = py + y;
}
}
}
/**
* XXX
*
* xxx
*
* @param m map to query.
* @return 1 if clockwise, 0 otherwise
*/
EAPI Eina_Bool
evas_map_util_clockwise_get(Evas_Map *m)
{
int i, j, k, count;
long long c;
if (!m) return 0;
if (m->count < 3) return 0;
count = 0;
for (i = 0; i < m->count; i++)
{
j = (i + 1) % m->count;
k = (i + 2) % m->count;
c =
((m->points[j].x - m->points[i].x) *
(m->points[k].y - m->points[j].y))
-
((m->points[j].y - m->points[i].y) *
(m->points[k].x - m->points[j].x));
if (c < 0) count--;
else if (c > 0) count++;
}
if (count > 0) return 1;
return 0;
}