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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。! O4 ^5 N3 J3 e- B7 Q' Q% g5 o0 X& o% B
- importPackage (java.lang);* W, L0 h( i; L5 ?# ]* @( {
- importPackage (java.awt);8 P3 R& z$ Y; V7 ^. y- ^7 Z; m
- ' l2 n* F- p$ G( J; C' ]
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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) j" T+ u0 f7 q: o# n! g- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);5 P: S' R( L9 \/ U2 `& v
- 7 ~9 J/ G% M, u) ^4 o. d
- function getW(str, font) {
! P% K7 V8 R2 \ - let frc = Resources.getFontRenderContext();, x' @, M9 g% d
- bounds = font.getStringBounds(str, frc);3 Y& p' f3 ?0 [( M
- return Math.ceil(bounds.getWidth());$ o" h! y. T: b4 Q3 ^
- }
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: R# ]6 X$ Z, i0 q+ P! q- da = (g) => {//底图绘制
0 w! F a. C% b3 k/ h - g.setColor(Color.BLACK);
: `: v5 Z8 b( H - g.fillRect(0, 0, 400, 400);' Y* J5 }; L! ^( I7 [
- }
' F6 C+ T% N5 X3 c0 _7 H
# ]# C* {. F6 U5 h) w- db = (g) => {//上层绘制1 q- c: F" b& [1 `' v) B1 }/ k [
- g.setColor(Color.WHITE);
4 [" k% X1 O6 L1 l+ j( k' b2 y - g.fillRect(0, 0, 400, 400);7 F% f- |9 \6 f/ J* B4 s
- g.setColor(Color.RED);$ _* w$ N" E/ m& S
- g.setFont(font0);
. H0 i q( Q# {7 k+ }4 F - let str = "晴纱是男娘";5 F6 v; L4 a0 l& Z; B0 P: Y
- let ww = 400;, ~, L b/ h9 z; R1 U2 Z( [
- let w = getW(str, font0);
7 ]( P, `& Q) ^- F) O - g.drawString(str, ww / 2 - w / 2, 200);* |* S' p* b* i( u8 ?' l
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+ v6 W2 X( m. b- const mat = new Matrices();6 \& ?0 S; [6 q5 q' Y$ U
- mat.translate(0, 0.5, 0);1 c2 F4 y( |# \0 p% w$ S0 d
- 6 A1 R3 [. b4 {. }( [
- function create(ctx, state, entity) {+ l) w5 X3 ]" ?5 H8 j
- let info = {
% A% ?$ g( m4 F @& Z) v( s - ctx: ctx,) \" H" C' {- W* X7 _7 S
- isTrain: false,3 a/ K' A% ?: \% u6 k& c
- matrices: [mat]," G; t# Q: Z' m8 ^
- texture: [400, 400],4 P Z; {. B) q' c- z: X5 ], [
- model: {
6 h* }- v2 k9 S - renderType: "light",
/ f) f$ \# R* W - size: [1, 1],; b# \+ {6 r, l( z
- uvSize: [1, 1]
: W- p/ B/ ?; f" }$ Q - }
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- let f = new Face(info);
) a0 R, t" @& n - state.f = f;+ e, R G$ m( d7 a; u" G
- 6 j- p/ m$ M5 m5 l. q+ v# I
- let t = f.texture;
5 q, _% g- _0 i& o5 N9 W0 P - let g = t.graphics;
% D2 c, d; z- ~3 y) [) T4 b - state.running = true;+ D/ q+ C8 J2 ^$ V0 L
- let fps = 24;
2 X, k- ~+ T" |5 Q9 H( N - da(g);//绘制底图( X; @- { p' N% Q9 B
- t.upload();5 L( R+ e$ Y6 z: B( c- }4 r
- let k = 0;
& G/ b/ j2 u6 q4 p - let ti = Date.now();( }4 m3 s2 z: V& r4 a
- let rt = 0;& @' {) ]7 Y/ J2 J- j
- smooth = (k, v) => {// 平滑变化2 C( M/ i& E* d2 Y2 |/ R6 ?, ]- n4 ?
- if (v > k) return k;6 y/ W B. g7 x' F
- if (k < 0) return 0;8 c3 r9 u4 X: i/ b
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
: A* t7 O/ Y6 {8 O$ I9 ^* ? - }- b/ ~: ?1 _" {
- run = () => {// 新线程
; V6 y8 }% k' M. c, a# | - let id = Thread.currentThread().getId();
2 h4 Y( u$ M7 S9 `, k* k - print("Thread start:" + id);' ]( G, F! i- Y, ~$ t
- while (state.running) {8 S+ K4 n& c3 q+ c6 }9 v, ?9 Y
- try {
" F5 Q0 M, L v! G - k += (Date.now() - ti) / 1000 * 0.2;
" X: \) D( X, V, i. r: w - ti = Date.now();
2 W8 J2 J& z5 S7 X C0 O - if (k > 1.5) {
: a6 j0 ]& X& S, C- ~ - k = 0;
" t/ R5 Y3 w9 }9 A1 {( G - }. Z6 ]$ K# j& z4 y
- setComp(g, 1);
7 X6 D7 @2 o+ ~9 a" T - da(g);
' ?+ s; F8 j, \% ^3 k - let kk = smooth(1, k);//平滑切换透明度) L; G- M( K j' b$ ]. J$ N
- setComp(g, kk);% ~" V3 f) T0 ?6 Z% N3 z7 E
- db(g);
( p( k0 ]' p( o - t.upload();# [8 Y6 w- J5 y- I8 s
- ctx.setDebugInfo("rt" ,Date.now() - ti);# l* B0 p3 ?. p. f2 n* o
- ctx.setDebugInfo("k", k);! o1 C5 |. X( \7 B# t% ]2 r0 _
- ctx.setDebugInfo("sm", kk);, ]1 F/ M. h$ f) [1 v; q$ Z1 B
- rt = Date.now() - ti;
7 \/ O. S- ?/ E3 L% S - Thread.sleep(ck(rt - 1000 / fps));/ j2 |' M) w! B4 j/ ^: O- @
- ctx.setDebugInfo("error", 0)
' N l# H4 [: b9 Q+ C' f - } catch (e) {
6 Q$ v4 k' l: c - ctx.setDebugInfo("error", e);+ ]! w1 n/ e% d5 d
- }( w4 P i% O' X4 ?1 D9 l! D
- }
) @+ K4 t3 i. y) J6 ?$ L! q - print("Thread end:" + id);
4 ~0 z" r% ^! m+ w9 \ - }
+ _/ G' G/ z+ G6 P( o - let th = new Thread(run, "qiehuan");
6 s, z. n$ d+ ^2 j' y/ Y8 N - th.start();
F" ?: w( F; V8 M" o6 o0 N/ p; U - }
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- function render(ctx, state, entity) {7 b/ Q0 ?' S) g8 B5 P
- state.f.tick();
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- N! a; U4 o: I) P: o6 k- function dispose(ctx, state, entity) {$ D( ^, G# P1 f% L! @4 @2 o# v
- print("Dispose");
1 p) a' r% u6 J! Q - state.running = false;
, A; k8 S" b" g: [) { - state.f.close();) S0 a" B- C$ j9 y5 I0 z! A
- }; l( z7 h3 V' F* ?2 @
- 9 Q1 ^; e$ U: B& n( _
- function setComp(g, value) {
8 G( B# q8 e4 P" p" C3 {5 |6 {2 h - g.setComposite(AlphaComposite.SrcOver.derive(value));
7 ~; v1 m- {/ m% D( L1 z, ?' {6 F - }
复制代码
: T q2 `9 ` o l1 V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)0 l( l$ u9 F+ k
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