2d720b2a79
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4176 a1c6a512-1295-4272-9138-f99709370657
340 lines
8.1 KiB
C
340 lines
8.1 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2002 Damien Teney
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* modified to use int instead of float math by Andreas Zwirtes
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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***************************************************************************/
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#include "plugin.h"
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#ifdef HAVE_LCD_BITMAP
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/* Loops that the values are displayed */
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#define DISP_TIME 30
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struct point_3D {
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long x, y, z;
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};
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struct point_2D {
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long x, y;
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};
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static struct point_3D sommet[8];
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static struct point_3D point3D[8];
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static struct point_2D point2D[8];
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static long matrice[3][3];
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static int nb_points = 8;
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static int x_off = 56;
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static int y_off = 31;
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static int z_off = 600;
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/* Precalculated sine and cosine * 10000 (four digit fixed point math) */
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static int sin_table[91] =
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{
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0, 174, 348, 523, 697,
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871,1045,1218,1391,1564,
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1736,1908,2079,2249,2419,
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2588,2756,2923,3090,3255,
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3420,3583,3746,3907,4067,
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4226,4383,4539,4694,4848,
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5000,5150,5299,5446,5591,
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5735,5877,6018,6156,6293,
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6427,6560,6691,6819,6946,
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7071,7193,7313,7431,7547,
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7660,7771,7880,7986,8090,
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8191,8290,8386,8480,8571,
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8660,8746,8829,8910,8987,
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9063,9135,9205,9271,9335,
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9396,9455,9510,9563,9612,
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9659,9702,9743,9781,9816,
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9848,9876,9902,9925,9945,
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9961,9975,9986,9993,9998,
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10000
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};
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static struct plugin_api* rb;
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static long sin(int val)
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{
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/* Speed improvement through sukzessive lookup */
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if (val<181)
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{
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if (val<91)
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{
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/* phase 0-90 degree */
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return (long)sin_table[val];
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}
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else
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{
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/* phase 91-180 degree */
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return (long)sin_table[180-val];
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}
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}
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else
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{
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if (val<271)
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{
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/* phase 181-270 degree */
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return (-1L)*(long)sin_table[val-180];
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}
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else
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{
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/* phase 270-359 degree */
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return (-1L)*(long)sin_table[360-val];
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}
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}
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return 0;
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}
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static long cos(int val)
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{
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/* Speed improvement through sukzessive lookup */
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if (val<181)
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{
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if (val<91)
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{
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/* phase 0-90 degree */
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return (long)sin_table[90-val];
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}
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else
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{
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/* phase 91-180 degree */
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return (-1L)*(long)sin_table[val-90];
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}
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}
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else
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{
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if (val<271)
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{
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/* phase 181-270 degree */
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return (-1L)*(long)sin_table[270-val];
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}
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else
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{
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/* phase 270-359 degree */
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return (long)sin_table[val-270];
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}
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}
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return 0;
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}
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static void cube_rotate(int xa, int ya, int za)
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{
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int i;
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/* Just to prevent unnecessary lookups */
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long sxa,cxa,sya,cya,sza,cza;
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sxa=sin(xa);
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cxa=cos(xa);
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sya=sin(ya);
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cya=cos(ya);
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sza=sin(za);
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cza=cos(za);
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/* calculate overall translation matrix */
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matrice[0][0] = cza*cya/10000L;
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matrice[1][0] = sza*cya/10000L;
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matrice[2][0] = -sya;
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matrice[0][1] = cza*sya/10000L*sxa/10000L - sza*cxa/10000L;
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matrice[1][1] = sza*sya/10000L*sxa/10000L + cxa*cza/10000L;
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matrice[2][1] = sxa*cya/10000L;
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matrice[0][2] = cza*sya/10000L*cxa/10000L + sza*sxa/10000L;
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matrice[1][2] = sza*sya/10000L*cxa/10000L - cza*sxa/10000L;
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matrice[2][2] = cxa*cya/10000L;
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/* apply translation matrix to all points */
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for(i=0;i<nb_points;i++)
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{
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point3D[i].x = matrice[0][0]*sommet[i].x + matrice[1][0]*sommet[i].y
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+ matrice[2][0]*sommet[i].z;
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point3D[i].y = matrice[0][1]*sommet[i].x + matrice[1][1]*sommet[i].y
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+ matrice[2][1]*sommet[i].z;
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point3D[i].z = matrice[0][2]*sommet[i].x + matrice[1][2]*sommet[i].y
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+ matrice[2][2]*sommet[i].z;
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}
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}
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static void cube_viewport(void)
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{
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int i;
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/* Do viewport transformation for all points */
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for(i=0;i<nb_points;i++)
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{
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point2D[i].x=(((point3D[i].x)<<8)/10000L)/
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(point3D[i].z/10000L+z_off)+x_off;
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point2D[i].y=(((point3D[i].y)<<8)/10000L)/
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(point3D[i].z/10000L+z_off)+y_off;
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}
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}
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static void cube_init(void)
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{
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/* Original 3D-position of cube's corners */
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sommet[0].x = -40; sommet[0].y = -40; sommet[0].z = -40;
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sommet[1].x = 40; sommet[1].y = -40; sommet[1].z = -40;
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sommet[2].x = 40; sommet[2].y = 40; sommet[2].z = -40;
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sommet[3].x = -40; sommet[3].y = 40; sommet[3].z = -40;
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sommet[4].x = 40; sommet[4].y = -40; sommet[4].z = 40;
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sommet[5].x = -40; sommet[5].y = -40; sommet[5].z = 40;
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sommet[6].x = -40; sommet[6].y = 40; sommet[6].z = 40;
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sommet[7].x = 40; sommet[7].y = 40; sommet[7].z = 40;
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}
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static void line(int a, int b)
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{
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rb->lcd_drawline(point2D[a].x, point2D[a].y, point2D[b].x, point2D[b].y);
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}
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static void cube_draw(void)
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{
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/* Draws front face */
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line(0,1); line(1,2);
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line(2,3); line(3,0);
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/* Draws rear face */
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line(4,5); line(5,6);
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line(6,7); line(7,4);
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/* Draws the other edges */
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line(0,5);
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line(1,4);
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line(2,7);
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line(3,6);
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}
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enum plugin_status plugin_start(struct plugin_api* api, void* parameter)
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{
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int t_disp=0;
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char buffer[30];
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int xa=0;
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int ya=0;
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int za=0;
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int xs=1;
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int ys=3;
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int zs=1;
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bool highspeed=0;
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bool exit=0;
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TEST_PLUGIN_API(api);
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(void)(parameter);
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rb = api;
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rb->lcd_setfont(FONT_SYSFIXED);
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cube_init();
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while(!exit)
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{
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if (highspeed)
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rb->yield();
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else
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rb->sleep(4);
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rb->lcd_clear_display();
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cube_rotate(xa,ya,za);
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cube_viewport();
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cube_draw();
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if (t_disp>0)
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{
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t_disp--;
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rb->snprintf(buffer, 30, "x:%d y:%d z:%d h:%d",xs,ys,zs,highspeed);
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rb->lcd_putsxy(0, 56, buffer);
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}
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rb->lcd_update();
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xa+=xs;
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if (xa>359)
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xa-=360;
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if (xa<0)
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xa+=360;
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ya+=ys;
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if (ya>359)
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ya-=360;
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if (ya<0)
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ya+=360;
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za+=zs;
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if (za>359)
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za-=360;
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if (za<0)
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za+=360;
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switch(rb->button_get(false))
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{
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case BUTTON_RIGHT:
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xs+=1;
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if (xs>10)
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xs=10;
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t_disp=DISP_TIME;
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break;
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case BUTTON_LEFT:
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xs-=1;
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if (xs<-10)
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xs=-10;
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t_disp=DISP_TIME;
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break;
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case BUTTON_UP:
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ys+=1;
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if (ys>10)
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ys=10;
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t_disp=DISP_TIME;
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break;
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case BUTTON_DOWN:
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ys-=1;
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if (ys<-10)
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ys=-10;
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t_disp=DISP_TIME;
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break;
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case BUTTON_F2:
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zs+=1;
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if (zs>10)
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zs=10;
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t_disp=DISP_TIME;
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break;
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case BUTTON_F1:
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zs-=1;
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if (zs<-10)
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zs=-10;
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t_disp=DISP_TIME;
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break;
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case BUTTON_PLAY:
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highspeed=!highspeed;
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t_disp=DISP_TIME;
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break;
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case BUTTON_OFF|BUTTON_REL:
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exit=1;
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break;
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case SYS_USB_CONNECTED:
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rb->usb_screen();
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return PLUGIN_USB_CONNECTED;
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}
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}
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return PLUGIN_OK;
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}
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#endif
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