136 lines
3.2 KiB
C
136 lines
3.2 KiB
C
#include <sysinit.h>
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#include "basic/basic.h"
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#include "lcd/render.h"
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#include "lcd/display.h"
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#include "lcd/allfonts.h"
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#define FIXSIZE 25
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#define mul(a,b) ((((long long)a)*(b))>>FIXSIZE)
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#define fixpt(a) ((long)(((a)*(1<<FIXSIZE))))
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#define integer(a) (((a)+(1<<(FIXSIZE-1)))>>FIXSIZE)
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#define ZOOM_RATIO 0.90
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#define ITERATION_MAX 150
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void blink(){
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gpioSetValue (RB_LED1, CFG_LED_OFF);
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delayms(100);
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gpioSetValue (RB_LED1, CFG_LED_ON);
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delayms(100);
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gpioSetValue (RB_LED1, CFG_LED_OFF);
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}
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struct mb {
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long rmin, rmax, imin, imax;
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bool dirty;
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} mandel;
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void mandelInit() {
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//mandel.rmin = -2.2*0.9;
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//mandel.rmax = 1.0*0.9;
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//mandel.imin = -2.0*0.9;
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//mandel.imax = 2.0*0.9;
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mandel.rmin = fixpt(-2);
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mandel.rmax = fixpt(1);
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mandel.imin = fixpt(-2);
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mandel.imax = fixpt(2);
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mandel.dirty = true;
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}
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void mandelMove() {
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long delta_r = (mandel.rmax - mandel.rmin)/10;
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long delta_i = (mandel.imax - mandel.imin)/10;
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char key = getInputRaw();
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if(key == BTN_LEFT) {
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mandel.imax -= delta_i;
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mandel.imin -= delta_i;
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mandel.dirty = true;
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} else if (key == BTN_RIGHT) {
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mandel.imax += delta_i;
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mandel.imin += delta_i;
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mandel.dirty = true;
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} else if (key == BTN_DOWN) {
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mandel.rmax += delta_r;
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mandel.rmin += delta_r;
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mandel.dirty = true;
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} else if (key == BTN_UP) {
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mandel.rmax -= delta_r;
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mandel.rmin -= delta_r;
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mandel.dirty = true;
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} else if (key == BTN_ENTER) {
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mandel.imin = mandel.imin + (mandel.imax-mandel.imin)/10;
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mandel.imax = mandel.imax - (mandel.imax-mandel.imin)/10;
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mandel.rmin = mandel.rmin +(mandel.rmax-mandel.rmin)/10;
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mandel.rmax = mandel.rmax -(mandel.rmax-mandel.rmin)/10;
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mandel.dirty = true;
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}
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}
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void mandelCalc() {
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long r0,i0,rn, p,q;
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long rs,is;
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int iteration;
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char x, y;
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rs=(mandel.rmax-mandel.rmin)/RESY;
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is=(mandel.imax-mandel.imin)/RESX;
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for (x=0; x<RESX; x++){
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for (y=0; y<RESY; y++) {
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p=mandel.rmin+y*rs;
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q=mandel.imin+x*is;
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rn=0;
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r0=0;
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i0=0;
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iteration=0;
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while ((mul(rn,rn)+mul(i0,i0))<fixpt(4) && ++iteration<ITERATION_MAX) {
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rn=mul((r0+i0),(r0-i0)) +p;
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i0=mul(fixpt(2),mul(r0,i0)) +q;
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r0=rn;
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}
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if (iteration==ITERATION_MAX) iteration=1;
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bool pixel = ( iteration>1);
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lcdSetPixel(x, y, pixel);
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}
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}
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mandel.dirty = false;
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}
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void main_mandelbrot2(void) {
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backlightInit();
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IOCON_PIO3_3 = 0x10;
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font=&Font_7x8;
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mandelInit();
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while (1) {
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lcdDisplay(0);
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mandelMove();
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if (mandel.dirty) {
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mandelCalc();
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}
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if(gpioGetValue(RB_BTN0)==0 && gpioGetValue(RB_BTN4)==0){
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DoString(0,0,"Enter ISP!");
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lcdDisplay(0);
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ISPandReset(5);
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}
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}
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return;
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}
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void tick_mandelbrot2(void){
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static int foo=0;
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static int toggle=0;
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if(foo++>50){
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toggle=1-toggle;
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foo=0;
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gpioSetValue (RB_LED0, toggle);
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};
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return;
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};
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