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Diffstat (limited to '3rdparty/boing/main.c')
| -rw-r--r-- | 3rdparty/boing/main.c | 111 |
1 files changed, 0 insertions, 111 deletions
diff --git a/3rdparty/boing/main.c b/3rdparty/boing/main.c deleted file mode 100644 index a34cd2a9..00000000 --- a/3rdparty/boing/main.c +++ /dev/null @@ -1,111 +0,0 @@ -/* Derived from the 2011 IOCCC submission by peter.eastman@gmail.com - * http://www.ioccc.org/2011/eastman/eastman.c - * -- - * Public Domain -- but you're looking at this for ideas of techniques - * and methods, not trying to cut&paste an entire application, anyway. - * -- - * When you need to blit an entire screenfull of data to an LCD - * display, the basic idea is to exploit the auto-increment feature of - * the display controller when it writes to screen memory. You start - * by resetting the 'cursor' to the 0,0 position, and then stream - * width*height pixels out. - * -- - * Chris Baird,, <cjb@brushtail.apana.org.au> April 2013 - */ - -#include <math.h> -#include "ch.h" -#include "hal.h" -#include "gfx.h" -#include "ssd2119.h" - -#define Lightgrey (HTML2COLOR(0xC0C0C0)) -#define Midgrey (HTML2COLOR(0x606060)) -#define Darkgrey (HTML2COLOR(0x303030)) - - -/* ---------------------------------------------------------------------- */ -/* As of early April 2013, the /gfx extension tries to keep the low-level - * stuff away from our filthy paws. So Code Duplication. - * (Possibly to be replaced with gdispStartStream(), gdispWriteStream() - * and gdispStopStream() in the future.) - */ - -#define GDISP_REG (*((volatile uint16_t *) 0x60000000)) /* DC = 0 */ -#define GDISP_RAM (*((volatile uint16_t *) 0x60100000)) /* DC = 1 */ - -inline void write_index (uint16_t index) { GDISP_REG = index; } -inline void write_data (uint16_t data) { GDISP_RAM = data; } - -#define write_reg(reg, data) { write_index(reg); write_data(data); } - -void reset_cursor (void) -{ - write_reg (SSD2119_REG_X_RAM_ADDR, 0); - write_reg (SSD2119_REG_Y_RAM_ADDR, 0); -} - -#define StartStream() { write_index (SSD2119_REG_RAM_DATA); } -#define WriteStream(x) { write_data (x); } -#define StopStream() /* NOP */ - - -/* ---------------------------------------------------------------------- */ - -void main (void) -{ - uint16_t xx, yy, colour; - - halInit(); - chSysInit(); - gdispInit(); - - uint16_t width = (uint16_t)gdispGetWidth(); - uint16_t height = (uint16_t)gdispGetHeight(); - - float i=height/5+height%2+1, floorstart=height/5-1, spherespin=0.0, - l=width/2, m=height/4, n=.01*width, o=0.0, rotspeed=0.1, h, f, g; - - while (TRUE) - { - reset_cursor (); - StartStream (); - - for (xx=yy=0; - h = (m-yy)/i, f=-.3*(g=(l-xx)/i)+.954*h, yy<height; - yy += (xx = ++xx%width)==0 ) - { - if (g*g < 1-h*h) /* if inside the ball */ - if (((int)(9-spherespin+(.954*g+.3*h)/sqrtf(1-f*f))+(int)(2+f*2))%2==0) - colour = Red; - else - colour = White; - else - { - if (xx<floorstart || xx>width-floorstart) - colour = Darkgrey; /* side wall */ - else - colour = Lightgrey; /* back wall */ - - if (yy > height-floorstart) - if (xx < height-yy || height-yy > width-xx) /* floor */ - colour = Darkgrey; - else - colour = Midgrey; - - if (g*(g+.6)+.09+h*h < 1) - colour >>= 1; /* ball shadow; make it darker */ - } - - WriteStream (colour); /* pixel to the LCD */ - } - - StopStream(); - spherespin += rotspeed; - m += o; - o = m > height-1.75*floorstart ? -.04*height : o+.002*height; - n = (l+=n)<i || l>width-i ? rotspeed=-rotspeed,-n : n; - } -} - -/* ---------------------------------------------------------------------- */ |