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这些天想了想怎么给LCD做丝滑的动画,稍微想了想,便有了下面这些代码。
) x% x0 d' S" l0 f: I- importPackage (java.lang);- ^, X h% e2 A$ B2 p
- importPackage (java.awt);6 ~* W- E; y/ |9 ^+ M2 {( ^
- - e% N" m6 k& S5 T% U) c! y& H
- include(Resources.id("mtrsteamloco:library/code/face.js"));7 ]$ v1 b3 b* v: Q2 g" h
- 5 {% q! `& {- i8 X, C6 [( |
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);8 v1 }" ], `3 M8 K
- % }! ?3 ^& y" C5 H! ~
- function getW(str, font) {
6 z4 j( `' |' l- J: ~ - let frc = Resources.getFontRenderContext();
, f& V/ k$ _: s. b - bounds = font.getStringBounds(str, frc);
' j& v: U; S$ ^' B7 @- F O7 y% Z - return Math.ceil(bounds.getWidth());6 \5 _, k8 @( Y9 E5 T. B" u8 {* I7 M
- }
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, G8 e2 j- |0 X. `* z- da = (g) => {//底图绘制9 p: Z, H+ ?8 s8 r
- g.setColor(Color.BLACK);
" Y. X5 H& E. @: B9 t4 P - g.fillRect(0, 0, 400, 400);! E2 J$ ?0 i) O+ d$ o( ^
- }7 R [2 h- M( C
- ) t, n, U7 X. Z# Y% l2 }
- db = (g) => {//上层绘制
7 U( P. Z0 J1 m1 { y - g.setColor(Color.WHITE);# ?( [3 [, n1 F2 E$ U* X }
- g.fillRect(0, 0, 400, 400);
- z2 F5 U2 r5 b7 x6 g - g.setColor(Color.RED);
! o8 q" o$ M$ h* w - g.setFont(font0);
& A: m3 ]: r) } - let str = "晴纱是男娘";! C0 Y* t* E( i$ `: K
- let ww = 400;
2 S- T( p/ [) d$ l6 z - let w = getW(str, font0);
. J3 _7 J8 H8 p3 x* E, g - g.drawString(str, ww / 2 - w / 2, 200);3 A: I- u* ~6 f# j( t2 H2 a
- }
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- const mat = new Matrices();7 S1 D' e5 K' a
- mat.translate(0, 0.5, 0);
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$ d6 M) D' f5 Z8 k/ \ V- function create(ctx, state, entity) {6 L( U/ d5 z9 K
- let info = {
' M8 j+ n; b, ` - ctx: ctx,
5 V! {& ]9 ]" H$ g( \, `6 P% k - isTrain: false,/ H+ F" g. S( e6 D
- matrices: [mat],: G0 E. s$ ^: }# e/ }7 J# @4 l
- texture: [400, 400],7 f0 j# l2 t* t) |4 M* h
- model: {
1 q2 V& R4 j$ p5 W! Q) Y - renderType: "light",+ A) X5 i5 l6 J
- size: [1, 1],# y ^$ } U# h' H0 k! b( t7 N
- uvSize: [1, 1]
( C% v3 Y8 k0 l m5 g' J. F' G, U( r' x - }# A* E+ k1 I9 R( [6 a5 ?
- }
" B" `' Y: o( |2 x* X( y7 W - let f = new Face(info);
( S: Z. u2 B/ w' B2 C& N% R - state.f = f;
' ]. ]2 \0 S9 y' Y1 O2 V9 K! Y! x: g - 9 {7 h; ]' o( R+ ?5 _ e7 x6 N/ _
- let t = f.texture;/ b+ c$ d* H/ P6 Q
- let g = t.graphics;9 {2 [* \8 J+ }3 u7 J4 w
- state.running = true;1 K% v6 J6 [* G8 `
- let fps = 24;6 u# N& U) o3 V
- da(g);//绘制底图
% T( _- U0 j4 x2 V - t.upload();
" H: H, P$ q8 I3 x. R- G2 d- R - let k = 0;. h# Y9 B, u. m
- let ti = Date.now();+ F, @- H& Q4 w! D. I) i! r
- let rt = 0;! I5 |1 h# ~7 O! Q3 C; D
- smooth = (k, v) => {// 平滑变化: N% Q0 ~: }/ d4 U- m' s
- if (v > k) return k;; ^1 [* D* z* Q) R1 J
- if (k < 0) return 0;% E( h7 d5 n! H9 M
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
% }. b" E( _0 l - }
: y3 S& C, I3 f/ U& ]5 ] - run = () => {// 新线程, z2 U: x% U1 o+ b# k& Z; L7 H
- let id = Thread.currentThread().getId();& u. p3 j" ~! A$ C, x; x
- print("Thread start:" + id);* `6 ~8 f. v2 P, b0 {0 i
- while (state.running) {' o7 F4 o# G3 f: J4 k5 A9 {' l
- try {$ G9 R, c' C- d& }" r$ [; Y
- k += (Date.now() - ti) / 1000 * 0.2;8 [$ u" }* a g& q2 |! ^$ G
- ti = Date.now();3 U, C5 A4 `) e3 H6 i* U" U
- if (k > 1.5) {! r7 B- E$ E/ i8 J q
- k = 0;! q/ a; }8 x! j0 B1 ?5 A1 Q8 `
- }/ b9 D3 b2 M# l* j- n
- setComp(g, 1);
- z% \% i. s) D# K9 g! r3 o - da(g);
! Z# f" e4 c. p5 F - let kk = smooth(1, k);//平滑切换透明度 D$ F4 j- I; T% M( h+ X( Y
- setComp(g, kk);; Y3 k3 H4 @1 [. [0 I- B
- db(g);% `. {0 t3 _/ R8 K; B
- t.upload();' ~- u; N' {# Z. W
- ctx.setDebugInfo("rt" ,Date.now() - ti);
' O, P& |, g, x - ctx.setDebugInfo("k", k);
0 W; O, g! s2 r2 _2 ^. ]7 ]; I - ctx.setDebugInfo("sm", kk);& C) A0 q3 T% H, r+ j
- rt = Date.now() - ti;
- ]7 E7 P9 d _: i - Thread.sleep(ck(rt - 1000 / fps));% H' g) Z2 q0 _# F! t6 ?5 H
- ctx.setDebugInfo("error", 0)! _) E N- `) _% d6 ~( y$ O' E
- } catch (e) {0 w! M- `& c6 O
- ctx.setDebugInfo("error", e);6 h* O6 X ?* ~3 X
- }
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- print("Thread end:" + id);7 v7 q9 i& N, w& w& |
- }/ l' v# }) v# \/ F) `8 }
- let th = new Thread(run, "qiehuan");
w! O' ~' u* C* t% }, E - th.start();
$ C- [, T- L) C; x - }
' L p+ q8 N7 [6 ]
% X% I: v* x6 Z: R: ~9 w; i1 g) `- ]- function render(ctx, state, entity) {, y$ y, L N$ w' u
- state.f.tick();
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- F* W% Z5 z. f- o ?0 J
- function dispose(ctx, state, entity) {. p' t* k3 E* |$ H' E
- print("Dispose");
+ _% g8 D& |- X6 X - state.running = false;
) q8 y/ V+ n, U$ O5 o - state.f.close();2 l# b' B% Z: s2 G7 u- x
- }/ n! z( y$ E9 |
& W/ R9 \4 ^, o. L/ z- function setComp(g, value) {
8 S5 d ]) d! e0 T W - g.setComposite(AlphaComposite.SrcOver.derive(value));" `) `/ Z& X8 a! N1 r
- }
复制代码 9 C8 j1 g4 [6 j' H+ g. t- k* `
写了这么久的js,我便渐渐发觉使用 render 来写更新内容有局限性,比如说会拉高延迟.....等等(但可能也没什么影响?)。在这里我用新建 Thread (线程) 然后在新的 Thread 里来处理图片更新逻辑,实现丝滑切换。
+ B0 M% A; k# q7 J. ^: Z# E* j9 }1 f2 o- p6 } ]# H* u
/ j: {4 A7 `" }) C |0 A/ y顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)
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