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rockbox/apps/plugins/cube.c

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 Damien Teney
* modified to use int instead of float math by Andreas Zwirtes
* heavily extended by Jens Arnold
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
#include "plugin.h"
#include "playergfx.h"
#include "xlcd.h"
/* Loops that the values are displayed */
#define DISP_TIME 30
/* variable button definitions */
#if CONFIG_KEYPAD == RECORDER_PAD
#define CUBE_QUIT BUTTON_OFF
#define CUBE_X_INC BUTTON_RIGHT
#define CUBE_X_DEC BUTTON_LEFT
#define CUBE_Y_INC BUTTON_UP
#define CUBE_Y_DEC BUTTON_DOWN
#define CUBE_Z_INC BUTTON_F2
#define CUBE_Z_DEC BUTTON_F1
#define CUBE_MODE BUTTON_F3
#define CUBE_PAUSE BUTTON_PLAY
#define CUBE_HIGHSPEED BUTTON_ON
#elif CONFIG_KEYPAD == PLAYER_PAD
#define CUBE_QUIT BUTTON_STOP
#define CUBE_X_INC BUTTON_RIGHT
#define CUBE_X_DEC BUTTON_LEFT
#define CUBE_Y_INC (BUTTON_ON | BUTTON_RIGHT)
#define CUBE_Y_DEC (BUTTON_ON | BUTTON_LEFT)
#define CUBE_Z_INC (BUTTON_MENU | BUTTON_RIGHT)
#define CUBE_Z_DEC (BUTTON_MENU | BUTTON_LEFT)
#define CUBE_MODE_PRE BUTTON_MENU
#define CUBE_MODE (BUTTON_MENU | BUTTON_REL)
#define CUBE_PAUSE BUTTON_PLAY
#define CUBE_HIGHSPEED_PRE BUTTON_ON
#define CUBE_HIGHSPEED (BUTTON_ON | BUTTON_REL)
#elif CONFIG_KEYPAD == ONDIO_PAD
#define CUBE_QUIT BUTTON_OFF
#define CUBE_X_INC BUTTON_RIGHT
#define CUBE_X_DEC BUTTON_LEFT
#define CUBE_Y_INC BUTTON_UP
#define CUBE_Y_DEC BUTTON_DOWN
#define CUBE_Z_INC (BUTTON_MENU | BUTTON_UP)
#define CUBE_Z_DEC (BUTTON_MENU | BUTTON_DOWN)
#define CUBE_MODE_PRE BUTTON_MENU
#define CUBE_MODE (BUTTON_MENU | BUTTON_REL)
#define CUBE_PAUSE (BUTTON_MENU | BUTTON_LEFT)
#define CUBE_HIGHSPEED (BUTTON_MENU | BUTTON_RIGHT)
#elif (CONFIG_KEYPAD == IRIVER_H100_PAD) || \
(CONFIG_KEYPAD == IRIVER_H300_PAD)
#define CUBE_QUIT BUTTON_OFF
#define CUBE_X_INC BUTTON_RIGHT
#define CUBE_X_DEC BUTTON_LEFT
#define CUBE_Y_INC BUTTON_UP
#define CUBE_Y_DEC BUTTON_DOWN
#define CUBE_Z_INC (BUTTON_ON | BUTTON_UP)
#define CUBE_Z_DEC (BUTTON_ON | BUTTON_DOWN)
#define CUBE_MODE BUTTON_MODE
#define CUBE_PAUSE_PRE BUTTON_ON
#define CUBE_PAUSE (BUTTON_ON | BUTTON_REL)
#define CUBE_HIGHSPEED BUTTON_SELECT
#endif
#ifdef HAVE_LCD_BITMAP
#define MYLCD(fn) rb->lcd_ ## fn
#define DIST (10*LCD_HEIGHT/16)
static int x_off = LCD_WIDTH/2;
static int y_off = LCD_HEIGHT/2;
#if CONFIG_LCD == LCD_SSD1815
#define ASPECT 320 /* = 1.25 (fixed point 24.8) */
#else
#define ASPECT 256 /* = 1.00 */
#endif
#else /* !LCD_BITMAP */
#define MYLCD(fn) pgfx_ ## fn
#define DIST 9
static int x_off = 10;
static int y_off = 7;
#define ASPECT 300 /* = 1.175 */
#endif /* !LCD_BITMAP */
struct point_3D {
long x, y, z;
};
struct point_2D {
long x, y;
};
struct line {
int start, end;
};
struct face {
int corner[4];
int line[4];
};
/* initial, unrotated cube corners */
static const struct point_3D sommet[8] =
{
{-DIST, -DIST, -DIST},
{ DIST, -DIST, -DIST},
{ DIST, DIST, -DIST},
{-DIST, DIST, -DIST},
{-DIST, -DIST, DIST},
{ DIST, -DIST, DIST},
{ DIST, DIST, DIST},
{-DIST, DIST, DIST}
};
/* The 12 lines forming the edges */
static const struct line lines[12] =
{
{0, 1}, {1, 2}, {2, 3}, {3, 0},
{4, 7}, {7, 6}, {6, 5}, {5, 4},
{0, 4}, {1, 5}, {2, 6}, {3, 7}
};
static bool lines_drawn[12];
/* The 6 faces of the cube; points are in clockwise order when viewed
from the outside */
static const struct face faces[6] =
{
{{0, 1, 2, 3}, {0, 1, 2, 3}},
{{4, 7, 6, 5}, {4, 5, 6, 7}},
{{0, 4, 5, 1}, {8, 7, 9, 0}},
{{2, 6, 7, 3}, {10, 5, 11, 2}},
{{0, 3, 7, 4}, {3, 11, 4, 8}},
{{1, 5, 6, 2}, {9, 6, 10, 1}}
};
#if LCD_DEPTH > 1
static const int face_colors[6] =
{
2*MAX_LEVEL/3, 2*MAX_LEVEL/3, MAX_LEVEL/3, MAX_LEVEL/3, 0, 0
};
#endif
enum {
#if LCD_DEPTH > 1
SOLID,
#endif
HIDDEN_LINES,
WIREFRAME,
NUM_MODES
};
static int mode = 0;
static struct point_3D point3D[8];
static struct point_2D point2D[8];
static long matrice[3][3];
static const int nb_points = 8;
static long z_off = 600;
/* Precalculated sine and cosine * 16384 (fixed point 18.14) */
static const short sin_table[91] =
{
0, 285, 571, 857, 1142, 1427, 1712, 1996, 2280, 2563,
2845, 3126, 3406, 3685, 3963, 4240, 4516, 4790, 5062, 5334,
5603, 5871, 6137, 6401, 6663, 6924, 7182, 7438, 7691, 7943,
8191, 8438, 8682, 8923, 9161, 9397, 9630, 9860, 10086, 10310,
10531, 10748, 10963, 11173, 11381, 11585, 11785, 11982, 12175, 12365,
12550, 12732, 12910, 13084, 13254, 13420, 13582, 13740, 13894, 14043,
14188, 14329, 14466, 14598, 14725, 14848, 14967, 15081, 15190, 15295,
15395, 15491, 15582, 15668, 15749, 15825, 15897, 15964, 16025, 16082,
16135, 16182, 16224, 16261, 16294, 16321, 16344, 16361, 16374, 16381,
16384
};
static struct plugin_api* rb;
static long sin(int val)
{
/* Speed improvement through sukzessive lookup */
if (val < 181)
{
if (val < 91)
{
/* phase 0-90 degree */
return (long)sin_table[val];
}
else
{
/* phase 91-180 degree */
return (long)sin_table[180-val];
}
}
else
{
if (val < 271)
{
/* phase 181-270 degree */
return -(long)sin_table[val-180];
}
else
{
/* phase 270-359 degree */
return -(long)sin_table[360-val];
}
}
return 0;
}
static long cos(int val)
{
/* Speed improvement through sukzessive lookup */
if (val < 181)
{
if (val < 91)
{
/* phase 0-90 degree */
return (long)sin_table[90-val];
}
else
{
/* phase 91-180 degree */
return -(long)sin_table[val-90];
}
}
else
{
if (val < 271)
{
/* phase 181-270 degree */
return -(long)sin_table[270-val];
}
else
{
/* phase 270-359 degree */
return (long)sin_table[val-270];
}
}
return 0;
}
static void cube_rotate(int xa, int ya, int za)
{
int i;
/* Just to prevent unnecessary lookups */
long sxa, cxa, sya, cya, sza, cza;
sxa = sin(xa);
cxa = cos(xa);
sya = sin(ya);
cya = cos(ya);
sza = sin(za);
cza = cos(za);
/* calculate overall translation matrix */
matrice[0][0] = (cza * cya) >> 14;
matrice[1][0] = (sza * cya) >> 14;
matrice[2][0] = -sya;
matrice[0][1] = (((cza * sya) >> 14) * sxa - sza * cxa) >> 14;
matrice[1][1] = (((sza * sya) >> 14) * sxa + cxa * cza) >> 14;
matrice[2][1] = (sxa * cya) >> 14;
matrice[0][2] = (((cza * sya) >> 14) * cxa + sza * sxa) >> 14;
matrice[1][2] = (((sza * sya) >> 14) * cxa - cza * sxa) >> 14;
matrice[2][2] = (cxa * cya) >> 14;
/* apply translation matrix to all points */
for (i = 0; i < nb_points; i++)
{
point3D[i].x = matrice[0][0] * sommet[i].x + matrice[1][0] * sommet[i].y
+ matrice[2][0] * sommet[i].z;
point3D[i].y = matrice[0][1] * sommet[i].x + matrice[1][1] * sommet[i].y
+ matrice[2][1] * sommet[i].z;
point3D[i].z = matrice[0][2] * sommet[i].x + matrice[1][2] * sommet[i].y
+ matrice[2][2] * sommet[i].z;
}
}
static void cube_viewport(void)
{
int i;
/* Do viewport transformation for all points */
for (i = 0; i < nb_points; i++)
{
#if ASPECT != 256
point2D[i].x = (point3D[i].x * ASPECT) / (point3D[i].z + (z_off << 14))
+ x_off;
#else
point2D[i].x = (point3D[i].x << 8) / (point3D[i].z + (z_off << 14))
+ x_off;
#endif
point2D[i].y = (point3D[i].y << 8) / (point3D[i].z + (z_off << 14))
+ y_off;
}
}
static void cube_draw(void)
{
int i, j, line;
switch (mode)
{
#if LCD_DEPTH > 1
case SOLID:
for (i = 0; i < 6; i++)
{
/* backface culling; if the shape winds counter-clockwise, we are
* looking at the backface, and the (simplified) cross product
* is < 0. Do not draw it. */
if (0 >= (point2D[faces[i].corner[1]].x - point2D[faces[i].corner[0]].x)
* (point2D[faces[i].corner[2]].y - point2D[faces[i].corner[1]].y)
- (point2D[faces[i].corner[1]].y - point2D[faces[i].corner[0]].y)
* (point2D[faces[i].corner[2]].x - point2D[faces[i].corner[1]].x))
continue;
rb->lcd_set_foreground(face_colors[i]);
xlcd_filltriangle(point2D[faces[i].corner[0]].x,
point2D[faces[i].corner[0]].y,
point2D[faces[i].corner[1]].x,
point2D[faces[i].corner[1]].y,
point2D[faces[i].corner[2]].x,
point2D[faces[i].corner[2]].y);
xlcd_filltriangle(point2D[faces[i].corner[0]].x,
point2D[faces[i].corner[0]].y,
point2D[faces[i].corner[2]].x,
point2D[faces[i].corner[2]].y,
point2D[faces[i].corner[3]].x,
point2D[faces[i].corner[3]].y);
}
rb->lcd_set_foreground(0);
break;
#endif /* LCD_DEPTH > 1 */
case HIDDEN_LINES:
rb->memset(lines_drawn, 0, sizeof(lines_drawn));
for (i = 0; i < 6; i++)
{
/* backface culling; if the shape winds counter-clockwise, we are
* looking at the backface, and the (simplified) cross product
* is < 0. Do not draw it. */
if (0 >= (point2D[faces[i].corner[1]].x - point2D[faces[i].corner[0]].x)
* (point2D[faces[i].corner[2]].y - point2D[faces[i].corner[1]].y)
- (point2D[faces[i].corner[1]].y - point2D[faces[i].corner[0]].y)
* (point2D[faces[i].corner[2]].x - point2D[faces[i].corner[1]].x))
continue;
for (j = 0; j < 4; j++)
{
line = faces[i].line[j];
if (!lines_drawn[line])
{
lines_drawn[line] = true;
MYLCD(drawline)(point2D[lines[line].start].x,
point2D[lines[line].start].y,
point2D[lines[line].end].x,
point2D[lines[line].end].y);
}
}
}
break;
case WIREFRAME:
for (i = 0; i < 12; i++)
MYLCD(drawline)(point2D[lines[i].start].x,
point2D[lines[i].start].y,
point2D[lines[i].end].x,
point2D[lines[i].end].y);
break;
}
}
enum plugin_status plugin_start(struct plugin_api* api, void* parameter)
{
char buffer[30];
int t_disp = 0;
int button;
int lastbutton = BUTTON_NONE;
int xa = 0;
int ya = 0;
int za = 0;
int xs = 1;
int ys = 3;
int zs = 1;
bool highspeed = false;
bool paused = false;
bool redraw = true;
bool exit = false;
TEST_PLUGIN_API(api);
(void)(parameter);
rb = api;
#ifdef HAVE_LCD_BITMAP
#if LCD_DEPTH > 1
xlcd_init(rb);
#endif
rb->lcd_setfont(FONT_SYSFIXED);
#else
if (!pgfx_init(rb, 4, 2))
{
rb->splash(HZ*2, true, "Old LCD :(");
return PLUGIN_OK;
}
pgfx_display(3, 0);
#endif
while(!exit)
{
if (highspeed)
rb->yield();
else
rb->sleep(4);
if (redraw)
{
MYLCD(clear_display)();
cube_rotate(xa, ya, za);
cube_viewport();
cube_draw();
redraw = false;
}
#ifdef HAVE_LCD_BITMAP
if (t_disp > 0)
{
t_disp--;
rb->snprintf(buffer, sizeof(buffer), "x:%d y:%d z:%d h:%d",
xs, ys, zs, highspeed);
rb->lcd_putsxy(0, LCD_HEIGHT-8, buffer);
if (t_disp == 0)
redraw = true;
}
#else
if (t_disp > 0)
{
if (t_disp == DISP_TIME)
{
rb->snprintf(buffer, sizeof(buffer), "x%d", xs);
rb->lcd_puts(0, 0, buffer);
rb->snprintf(buffer, sizeof(buffer), "y%d", ys);
rb->lcd_puts(0, 1, buffer);
pgfx_display(3, 0);
rb->snprintf(buffer, sizeof(buffer), "z%d", zs);
rb->lcd_puts(8, 0, buffer);
rb->snprintf(buffer, sizeof(buffer), "h%d", highspeed);
rb->lcd_puts(8, 1, buffer);
}
t_disp--;
if (t_disp == 0)
{
rb->lcd_clear_display();
pgfx_display(3, 0);
}
}
#endif
MYLCD(update)();
if (!paused)
{
xa += xs;
if (xa > 359)
xa -= 360;
if (xa < 0)
xa += 360;
ya += ys;
if (ya > 359)
ya -= 360;
if (ya < 0)
ya += 360;
za += zs;
if (za > 359)
za -= 360;
if (za < 0)
za += 360;
redraw = true;
}
button = rb->button_get(false);
switch (button)
{
case CUBE_X_INC:
if (xs < 10)
xs++;
t_disp = DISP_TIME;
break;
case CUBE_X_DEC:
if (xs > -10)
xs--;
t_disp = DISP_TIME;
break;
case CUBE_Y_INC:
if (ys < 10)
ys++;
t_disp = DISP_TIME;
break;
case CUBE_Y_DEC:
if (ys > -10)
ys--;
t_disp = DISP_TIME;
break;
case CUBE_Z_INC:
if (zs < 10)
zs++;
t_disp = DISP_TIME;
break;
case CUBE_Z_DEC:
if (zs > -10)
zs--;
t_disp = DISP_TIME;
break;
case CUBE_MODE:
#ifdef CUBE_MODE_PRE
if (lastbutton != CUBE_MODE_PRE)
break;
#endif
if (++mode >= NUM_MODES)
mode = 0;
redraw = true;
break;
case CUBE_PAUSE:
#ifdef CUBE_PAUSE_PRE
if (lastbutton != CUBE_PAUSE_PRE)
break;
#endif
paused = !paused;
break;
case CUBE_HIGHSPEED:
#ifdef CUBE_HIGHSPEED_PRE
if (lastbutton != CUBE_HIGHSPEED_PRE)
break;
#endif
highspeed = !highspeed;
t_disp = DISP_TIME;
break;
case CUBE_QUIT:
exit = true;
break;
default:
if (rb->default_event_handler(button) == SYS_USB_CONNECTED)
{
#ifdef HAVE_LCD_CHARCELLS
pgfx_release();
#endif
return PLUGIN_USB_CONNECTED;
}
break;
}
if (button != BUTTON_NONE)
lastbutton = button;
}
#ifdef HAVE_LCD_CHARCELLS
pgfx_release();
#endif
return PLUGIN_OK;
}
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