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BangleApps
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Make starfield into a tube

master
Felipe Manga 2024-01-15 10:14:21 +00:00
parent f82a15abd6
commit 15b6d92bff
1 changed files with 11 additions and 2 deletions
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13
apps/warpdrive/app.js
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@ -239,6 +239,12 @@ void stars() {
for (int i = 0; i < 100; ++i) {
int s = rng();
int a = rng();
int ca = cos(a);
int sa = sin(a);
int r = ((rng() & 0xFF) + 0xFF) << 9;
position.x = ca << 9;
position.y = sa << 9;
position.x = ((signed char)(s & 0xFF)) << 9;
s = rng();
position.y = ((signed char)(s & 0xFF)) << 9;
@ -260,6 +266,9 @@ void stars() {
if (s < 1) s = 1;
if (s > 10) s = 10;
int rx = s*sa >> 8;
int ry = s*ca >> 8;
position.x >>= 8;
position.y >>= 8;
scale.x >>= 8;
@ -270,8 +279,8 @@ void stars() {
int color = 4 | (i & 1);
fillTriangle(
scale.x, scale.y,
position.x - s, position.y,
position.x + s, position.y,
position.x - rx, position.y - ry,
position.x + rx, position.y + ry,
light ? alternate(color, 7) :
dark ? alternate(color, 0) :
solid(color)