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( L7 f a/ R) l; ]8 M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。2 ?& A0 v2 E! G; m) X5 E8 F, T9 q
- importPackage (java.lang);
- Y1 i! v' H" a, H. S" b2 v - importPackage (java.awt);0 X/ i# O- P/ G
+ F5 K' Y2 g* a+ R2 r! {5 q$ ]- include(Resources.id("mtrsteamloco:library/code/face.js"));
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, n! U/ x& T& x- S# t/ `2 |$ J- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
1 K$ g O( B8 A1 j - + n1 E' d, F2 A6 i
- function getW(str, font) {
0 X, o/ l6 k; N# q$ i) r3 k& P - let frc = Resources.getFontRenderContext();
% G1 r0 x* S8 h j+ _/ O3 ` - bounds = font.getStringBounds(str, frc);3 U4 [0 H1 G0 s7 D0 V7 ^
- return Math.ceil(bounds.getWidth());; O7 Y9 H Y; I( w' F1 r" N
- }0 C5 |* q: X/ b3 I5 O
8 j; g( o9 O) J) H" ]5 n ^: G/ e- da = (g) => {//底图绘制
/ B/ o7 w! V6 x$ J2 d - g.setColor(Color.BLACK);
( R7 C% b. [. T) J4 b1 M - g.fillRect(0, 0, 400, 400);- U/ O5 W+ ]0 H- {. Y
- }
3 f: q- f6 {: M5 t" e' C: z - |0 V6 q3 R% a! k, J. o! Q5 {
- db = (g) => {//上层绘制
, p( I. N" O3 A - g.setColor(Color.WHITE);
/ u- @& N6 d/ t* V6 N) d1 _ - g.fillRect(0, 0, 400, 400);1 \4 Y h) D! R( }- H
- g.setColor(Color.RED);
/ ]7 {1 D; |2 }( N2 l% } - g.setFont(font0);0 r1 Z5 z7 s; }/ j3 @
- let str = "晴纱是男娘";
" i& w6 \6 O# _! c& q3 m - let ww = 400;$ \4 Q+ M- I/ h! B9 `/ o
- let w = getW(str, font0);
7 I0 Z# r( R3 ~% F3 w# Q - g.drawString(str, ww / 2 - w / 2, 200);
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4 f: b+ q! S/ K' y- const mat = new Matrices();
( |1 C7 H B* O) @( ? - mat.translate(0, 0.5, 0);% U; z. V% v5 u& a# n2 [
- * L# x& g4 O# Q& B- T& k
- function create(ctx, state, entity) {
, m) O0 |8 q% p$ h. n/ W9 N - let info = {0 h; i/ T1 X. n9 W8 W( z& q
- ctx: ctx,
, y7 \; F% N; ?1 S! `, E - isTrain: false,
2 v; l9 T+ W8 `, @( H* m - matrices: [mat],+ u: _' v' ~ C/ n6 c. d7 B
- texture: [400, 400],
9 V$ j7 g! b& I! }0 ?6 d5 _& `* x - model: {
+ H/ h2 r6 z$ J% L - renderType: "light",* a9 N. ^/ l( l3 j: g1 W" H+ o+ `
- size: [1, 1],
7 {* k% _0 Z/ s% y' O: ? - uvSize: [1, 1]* R* ?* l9 d; G, T
- }
- i5 Q( t6 b% Z& N! U3 F/ V2 w% P - }$ j& `! c1 K' t8 r. J
- let f = new Face(info);6 _. N1 }0 w) z
- state.f = f;
( l6 e- P& h# z' K$ J
# z# K: @( N- t6 j, e- let t = f.texture;5 I0 `( O! `6 v8 J1 y
- let g = t.graphics;
/ c9 p& i+ E" I( S$ x2 j9 o& t3 ] - state.running = true;
% p- G. X+ g+ c6 W1 E% u - let fps = 24;2 ^3 o- u6 j2 J0 N
- da(g);//绘制底图. [: j6 U% j3 L
- t.upload();
- S0 ]% D. X) l6 {& g. m - let k = 0;9 m0 q; c4 w: O* C9 k$ V
- let ti = Date.now();4 m7 s' G% S: ~/ J
- let rt = 0;
( U4 g, z$ u, V+ ^ - smooth = (k, v) => {// 平滑变化1 i8 c/ g+ e: U. t" R
- if (v > k) return k;
5 O ~& X* \, y$ O2 e2 ~$ ] - if (k < 0) return 0;
6 L" a: r9 v1 k# i - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
6 V3 i$ j9 S% N! X; b" @ - }6 a( D. ~7 X; F0 l0 x
- run = () => {// 新线程- v. ]3 x) L3 W/ `: B t0 ~, V) M
- let id = Thread.currentThread().getId();' X1 X/ j5 G$ }8 B" p5 r# |: f: |
- print("Thread start:" + id);0 W8 u7 `: ] \6 [; K+ W a/ f# x* b
- while (state.running) {
. w* }" E$ Y% e/ b# k( ~8 p& o - try {
p6 {1 q% a8 m, O. f - k += (Date.now() - ti) / 1000 * 0.2;% F. }, m! H) u# C# Y
- ti = Date.now();+ J4 X+ ~: f9 G& w5 I) u/ ~) `) O
- if (k > 1.5) {0 ?* i# d+ ?" o) g8 ]+ C$ K3 H
- k = 0;: M4 L, k% S$ ^
- }
9 j' a; ~9 k* b+ ~4 A- | - setComp(g, 1);
# d1 {( k& \0 b s {2 e+ S1 a - da(g);2 w% V- q! T2 ~) }) q- M; `
- let kk = smooth(1, k);//平滑切换透明度, z# p' ], O4 W; K4 L6 ?
- setComp(g, kk);
. z9 }2 E" k0 b; L) T3 z - db(g);; ^% q# m, x2 {7 ]1 p
- t.upload();
, s- O. r4 N: v& W8 w' a - ctx.setDebugInfo("rt" ,Date.now() - ti);
: [% w# H& c) L/ d; F- x6 s2 V - ctx.setDebugInfo("k", k);
1 e% k8 {2 c0 ]1 \4 y- p - ctx.setDebugInfo("sm", kk);0 ?# G9 |( Q5 G' f( p5 d5 W
- rt = Date.now() - ti;
) @/ `# N1 V. _( R8 z - Thread.sleep(ck(rt - 1000 / fps));1 H0 G$ V- l7 L) M) }
- ctx.setDebugInfo("error", 0), M! z( k- L/ b; r& a) F
- } catch (e) {
+ @) ?8 I E& ~ }+ x$ N P - ctx.setDebugInfo("error", e);% t6 { D/ S [$ p
- }
- S: \/ }; n. X( x3 F3 U2 V6 T. C3 z - }
2 P% C+ \0 w: l, Z- A5 m - print("Thread end:" + id);: K, H+ G' Z( C t7 x
- }5 ? O+ L3 J( W0 D
- let th = new Thread(run, "qiehuan");9 R% g& j% q3 A
- th.start();
" e. s3 S% e, p - } ^ D5 z ]5 {! Z% _" X- x
1 A" p4 i5 @% I3 M- Z+ e$ u0 d- function render(ctx, state, entity) {
& q" l$ }5 p0 D3 s) @5 P - state.f.tick();
% i/ {( E% ~# [% O4 A - }
- ]% S a6 A: ^2 F+ g# p - 0 R$ P8 d8 p6 Z5 F$ b+ V: E, _8 R
- function dispose(ctx, state, entity) {5 ?5 w" A. a# p3 _; Q
- print("Dispose");
4 b7 c o$ w$ q4 _1 |4 I" [$ q& x - state.running = false;
' f V! k' a3 b! s - state.f.close();% {# l- h3 ]% \
- }
0 P! ^' U9 W$ T% d
4 M% t) g, u( Q+ \* Z- function setComp(g, value) {2 t* t" ~% }4 e) n( P* K. h" R) j* V
- g.setComposite(AlphaComposite.SrcOver.derive(value));4 _9 v- R/ Y6 r; ~: O
- }
复制代码 ! n5 E2 ^) y, q+ q- |4 _9 B" A6 X
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。) v' ?6 P: A# Y9 n+ K, k
# j; B* G* p% A7 n: {! {2 p
% K' U' Z4 z# `! A& l( E+ S顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下) ~' d4 k$ t: ?* W) X9 q- v; y
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