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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。/ A% V# }5 x6 y9 s, Y
- importPackage (java.lang);
( F2 F) R; F* c b3 a6 C$ ~ - importPackage (java.awt);/ G" ~+ |5 i0 j
4 E( y( s8 x h8 U- include(Resources.id("mtrsteamloco:library/code/face.js"));
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% C7 r- ~ Q' r; i5 b6 F$ |- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);' A2 ^8 U; {$ G& n; Y, i
2 P) @- e) ^$ g" J: i- function getW(str, font) {$ ]3 @/ X- t* p
- let frc = Resources.getFontRenderContext();" @ z# D. O, Y
- bounds = font.getStringBounds(str, frc);
/ h% O4 C& ^% A0 R- q% } - return Math.ceil(bounds.getWidth());, L; l, S; d$ ]
- }" G; F+ t- ~# O* E
- 7 F8 B% E# V3 _0 E' A L% C9 {
- da = (g) => {//底图绘制
. t* D. d7 f: M9 n - g.setColor(Color.BLACK);
0 C( X$ ]# z& I# i ~ - g.fillRect(0, 0, 400, 400);# _0 b, C! h u1 V6 r
- }
, S W0 d1 }& q4 ]9 m8 S; h9 u) @0 G
5 @( Q7 d8 k" K3 [4 M- db = (g) => {//上层绘制
: K0 t6 @+ D8 _ - g.setColor(Color.WHITE);
7 G+ `6 j- D# ] p9 | - g.fillRect(0, 0, 400, 400);# q# w& S; @ A
- g.setColor(Color.RED);! u7 }; O. r. \# k6 D5 B1 O
- g.setFont(font0);
6 P* t1 L+ Q5 W( q) O - let str = "晴纱是男娘";
" D5 {, F: ]4 B. n$ o - let ww = 400;
* E1 V% D; N; o& P+ H" A - let w = getW(str, font0);
+ X) x& j$ H: B9 O1 V4 y. N: ^9 _ - g.drawString(str, ww / 2 - w / 2, 200);. ^8 B; |2 F& S4 t) |- D" \
- }) S" g# q6 ~( g/ n
% q0 ~) Z4 A) a1 ]2 c# z- const mat = new Matrices();
, A x% b8 P0 t4 c2 `9 b6 q - mat.translate(0, 0.5, 0);7 j0 O/ Q; h- S2 O9 b
' Y w( h" j; ?- ^' N$ j- ]6 m- function create(ctx, state, entity) {* [4 T$ O& A, V( v* u9 G
- let info = {
+ w) P/ K+ ?8 O* v' }5 ~! @5 d+ m8 q: u3 i - ctx: ctx,
. ]; _5 O# s, P$ @. | - isTrain: false,& y0 H2 P& B0 N G2 Q3 @' T
- matrices: [mat],4 f- n* X+ e. B' ~; G6 g. u' {
- texture: [400, 400],
( A% K. M- ]- J" D - model: {7 T; T# f$ f. G, x; _
- renderType: "light",. `7 B/ O# z1 X' F% [* m
- size: [1, 1],! F# e: ~) e' _$ B- B; Y8 N
- uvSize: [1, 1]
7 M0 a4 a9 s' I$ j - }
3 ]* }1 i$ n6 i$ j- j { - }2 v, @- c' e2 W% Z* d! ]
- let f = new Face(info);
$ S( U+ d% R+ a% q& h, c2 Z/ W Z - state.f = f;5 d/ W0 e" u: R$ U% Z
: m: X3 j9 X$ Z. ~- let t = f.texture;4 i3 A9 q* s0 f* S
- let g = t.graphics;
3 a4 q9 \7 r: A2 W- m - state.running = true;+ ]( K) D6 q7 p, I6 |! m1 u9 |, A
- let fps = 24;/ o' k5 c' D" {6 v
- da(g);//绘制底图
: m( M3 \$ a$ K - t.upload();
* t# ~9 ]8 j: A { - let k = 0;
% s, G) z' ?+ b0 h3 T1 W - let ti = Date.now();
% G! H8 r6 q' R* N" M - let rt = 0;& Q' W& C- d# ?2 U8 }
- smooth = (k, v) => {// 平滑变化
5 i4 d7 T( M+ A" } - if (v > k) return k;1 t, \, r3 `1 |, s
- if (k < 0) return 0;
; o0 D4 g6 [/ P3 N - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;6 C: X$ n' [2 [* t" B& } @
- }
/ _/ t9 [& g8 l2 f1 Y - run = () => {// 新线程
9 ?7 m* Z+ r5 {, C - let id = Thread.currentThread().getId();: v3 x0 y z* J
- print("Thread start:" + id);
9 w9 M4 R) m A) F" x2 d - while (state.running) {4 H1 h* S' R! g
- try {( ?7 ]# l3 E: k( O
- k += (Date.now() - ti) / 1000 * 0.2;
. o6 t. ]- W# C4 u8 r$ W - ti = Date.now();4 X* K6 ?3 t( M9 q
- if (k > 1.5) {
3 M+ y7 p; R% L - k = 0; d# }. L4 ?# ]
- }
+ n0 r4 ~; m2 v/ q$ ^" Q8 x - setComp(g, 1);: F. D) d0 @$ f7 C/ u
- da(g);, \! \# p% Z! ]" \% O. p) G2 d2 ~# y1 R$ A
- let kk = smooth(1, k);//平滑切换透明度% S- @: Q% s1 S
- setComp(g, kk);
) T& m: f+ O; B; ? - db(g);9 [! ]5 Q: I. p# q: {% f$ y
- t.upload();
% v' [. J8 ?- n* ^/ `9 f6 _+ U - ctx.setDebugInfo("rt" ,Date.now() - ti);) c# B: L1 z# b" D5 j m4 a7 R
- ctx.setDebugInfo("k", k);3 S, i1 ~% h8 s" T% c) f0 o! z2 n
- ctx.setDebugInfo("sm", kk);) v% j* O7 Y* b3 G! x5 |' ]6 @
- rt = Date.now() - ti; _" |& S* B# \. \% C/ D, A; l
- Thread.sleep(ck(rt - 1000 / fps));/ j1 k* a( f# V0 \( F L6 d- ?
- ctx.setDebugInfo("error", 0)
0 H# h6 f' ^+ H5 ?0 j" b6 W - } catch (e) {
! o& L6 ?" M, d7 y U% |4 R' o0 [ - ctx.setDebugInfo("error", e);) M3 R" Q$ a- T1 o1 g2 q. F
- }
2 ~6 k/ v/ K! l8 g% n" Q( o B; h - }7 ^! o# x- a! D: `
- print("Thread end:" + id);9 h( v' @' o/ \% F+ o9 D2 ~
- } K* `- M: s( y6 ^5 w, X" F: K
- let th = new Thread(run, "qiehuan");. c( d1 k4 e% O( k
- th.start();# h+ a7 D$ |# H# F0 n, A7 |; r
- }
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- function render(ctx, state, entity) {
3 o+ m0 T E7 W5 t4 N5 n - state.f.tick();1 [" ?6 O- M) s
- }
/ {( I+ B) B* `# O& V: O - " J4 f+ c; R$ m: B. l
- function dispose(ctx, state, entity) {
P; w3 z) G! S, ~ - print("Dispose");
7 e! Q4 B% R+ E - state.running = false;
$ u: M. \6 K, H' h - state.f.close();
3 C7 G8 X8 L6 k: Z6 _& U - }
- C5 U( P, ]! g* e7 v8 P - 6 S1 @) m7 h+ J# N. e2 ?& ?
- function setComp(g, value) {
5 F" t- C1 i" V! p3 E p - g.setComposite(AlphaComposite.SrcOver.derive(value));0 _9 G) w% [' Q! n6 _
- }
复制代码 * d/ [( t( x# R8 t/ I# c; W0 U* p. r
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。
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顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)( E; \9 S4 K, I) D" ?$ \
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