74 lines
1.3 KiB
C
74 lines
1.3 KiB
C
#include <sysinit.h>
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#include "basic/basic.h"
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#include "basic/config.h"
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#include "lcd/lcd.h"
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#include "lcd/print.h"
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#include "usetable.h"
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#define NUM_STARS 150
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typedef struct {
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short x, y, z, speed;
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} s_star;
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static s_star stars[NUM_STARS];
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void init_star(s_star *star, int z);
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void ram(void)
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{
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short centerx = RESX >> 1;
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short centery = RESY >> 1;
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short i;
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for (i = 0; i < NUM_STARS; i++) {
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init_star(stars + i, i + 1);
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}
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while(getInputRaw()==BTN_NONE){
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lcdClear();
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for (i = 0; i < NUM_STARS; i++) {
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stars[i].z -= stars[i].speed;
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if (stars[i].z <= 0)
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init_star(stars + i, i + 1);
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short tempx = ((stars[i].x * 30) / stars[i].z) + centerx;
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short tempy = ((stars[i].y * 30) / stars[i].z) + centery;
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if (tempx < 0 || tempx > RESX - 1 || tempy < 0 || tempy > RESY - 1) {
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init_star(stars + i, i + 1);
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continue;
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}
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lcdSetPixel(tempx, tempy, 1);
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if (stars[i].z < 50) {
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lcdSetPixel(tempx + 1, tempy, 1);
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}
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if (stars[i].z < 20) {
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lcdSetPixel(tempx, tempy + 1, 1);
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lcdSetPixel(tempx + 1, tempy + 1, 1);
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}
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}
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lcdRefresh();
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delayms_queue_plus(50,0);
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}
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}
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void init_star(s_star *star, int z)
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{
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star->x = (getRandom() % RESX) - (RESX >> 1);
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star->y = (getRandom() % RESY) - (RESY >> 1);
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star->z = z;
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star->speed = (getRandom() % 4) + 1;
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return;
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}
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