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1 D' P: ^( Z9 B1 b9 }# }' r' I9 D( F6 L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。
( z& @6 j" D; x4 h6 V0 Q$ J+ N6 P- importPackage (java.lang);$ T) p# U+ R5 i
- importPackage (java.awt);
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. h& N V1 c% M3 c8 k- include(Resources.id("mtrsteamloco:library/code/face.js"));
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4 N7 ?# ?: K+ \5 X. k- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);2 T& |5 H" n9 T
+ h- y7 a/ G! f* s9 T- function getW(str, font) {! Q3 w' Z9 h# t# y; P$ P+ L
- let frc = Resources.getFontRenderContext();
* A F) g) \. b- w9 } - bounds = font.getStringBounds(str, frc);
& W4 k# o9 V% D3 L# ?! w4 k - return Math.ceil(bounds.getWidth());8 j" E/ f) l* @# m4 }2 I$ t
- }6 [$ B: p% d$ @8 ]: y/ u8 C0 N
- # R& `2 \2 g# b: q! A
- da = (g) => {//底图绘制6 Q: S, V7 a& S, s; T
- g.setColor(Color.BLACK);4 T/ O3 m1 Q* @0 Y+ @: D
- g.fillRect(0, 0, 400, 400);
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1 ]. a& @/ l! D" q- db = (g) => {//上层绘制
M2 S' T! Y9 K: d: |, I% h) X - g.setColor(Color.WHITE);# h7 a4 M9 [& }9 k* n$ b% U
- g.fillRect(0, 0, 400, 400);
, P7 H7 @0 d& | - g.setColor(Color.RED);& ~& B- q, ~1 @4 {# q
- g.setFont(font0);
5 x7 `; c. s' M4 F - let str = "晴纱是男娘"; B0 y l+ z: q' _! r
- let ww = 400; \, k- K8 v+ f/ A& L/ W8 e5 |
- let w = getW(str, font0);
0 a% S2 H& b: [$ u0 ~$ K$ b! U - g.drawString(str, ww / 2 - w / 2, 200);
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1 k5 `+ n6 B2 J* p* [- const mat = new Matrices();* g5 h7 v! W4 `3 E4 L
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {" C* Q/ }3 W, \9 w# L! e% m% m
- let info = {
3 o( L# v ^* J1 m - ctx: ctx,5 D/ v: P: O! B8 u/ |0 N, Z
- isTrain: false,# Y; W. ~9 \, |% X* ~
- matrices: [mat],
8 r' v; e8 q* u# |' ~ - texture: [400, 400]," T, Z8 R, E0 `3 a' W$ d5 S
- model: {
% w y- Z" ]% I, g - renderType: "light",' E2 D7 Y" H! p6 {
- size: [1, 1],5 e2 Q1 M6 A# M$ P5 V& C& Y& H
- uvSize: [1, 1]
0 \7 e8 q5 f2 \! u) p" V. x - }
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- let f = new Face(info);
; ~ [+ b: a! ?6 l+ W& R/ W - state.f = f;
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- let t = f.texture;+ S# u, `. `& @* ~ `7 x( d) T
- let g = t.graphics;
( E4 M8 P" n" a) r1 W' f# @( t3 P - state.running = true;6 k6 O6 |, ]- Z. m- a9 i0 C
- let fps = 24;
5 q: U+ X* q& |) c' a, t' `5 k9 S - da(g);//绘制底图/ ?$ }7 f, w2 e, ^) u8 V) I
- t.upload();
f7 D0 o- f. D, D: w( E - let k = 0;# q9 g0 s* z8 d5 y, K0 `( O0 |
- let ti = Date.now();' N) Q9 C7 e1 x7 ?6 T
- let rt = 0;
' z# X; @- J* l9 S6 d! d P - smooth = (k, v) => {// 平滑变化
; K( \* _9 [& S) `& k3 i5 D' r - if (v > k) return k;+ B* H" s9 h' k1 K1 p$ j; s5 {# m* U
- if (k < 0) return 0;& ?; f7 A# c) b* {, T0 l3 S% m
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;* z; H0 Q7 @# e y8 |/ E# M
- } N& d6 \ j) E( ?. e5 r1 k
- run = () => {// 新线程
" j+ z9 f9 ?1 n4 |2 K - let id = Thread.currentThread().getId();" b$ W& T; y+ [8 @) X
- print("Thread start:" + id);
% j0 t4 E% \1 N" ]( r$ Q - while (state.running) {- m# P5 C- r: g9 G
- try {
" U5 w4 o' F @7 [" q8 `, j' i; g - k += (Date.now() - ti) / 1000 * 0.2;3 V* t" B# s- E
- ti = Date.now();
; C) w3 ?% G" l - if (k > 1.5) {. Y; ]# Y& ^; G" b t' l
- k = 0;( n( M! | C: n f. |
- }) a, \7 b/ x" {3 _- Q
- setComp(g, 1);( t( `/ _" v" f" H, t
- da(g);
3 d! F% A8 w& ^% |1 P - let kk = smooth(1, k);//平滑切换透明度
, P' A6 p/ `7 n$ \- n s - setComp(g, kk);
' v7 h5 g; n9 D6 N - db(g);2 s* @# D, a3 ^1 ]1 X
- t.upload();% ^3 r5 x2 I4 x! q
- ctx.setDebugInfo("rt" ,Date.now() - ti);: D% y, x/ t0 F1 ~6 E2 G4 P& ]0 ?
- ctx.setDebugInfo("k", k);0 S/ l5 |& Z- ]" g& a" O' k& i g
- ctx.setDebugInfo("sm", kk); c- [0 E* W& F" K O2 ~1 u7 @
- rt = Date.now() - ti;
- K! B; n$ G3 F9 e1 g - Thread.sleep(ck(rt - 1000 / fps));
& ]: K3 w* q& s9 Q - ctx.setDebugInfo("error", 0)
/ e6 N+ |- a; o - } catch (e) {
1 ]6 H0 r& Z% a& n' J% Y4 ] |+ K3 x - ctx.setDebugInfo("error", e);7 j4 q {$ A9 }
- }! \$ U# ^; o9 R- o9 Q/ y+ ^8 {
- }; r4 B: j. I) |# }0 n* t
- print("Thread end:" + id); y! E' \' F V3 Q& z
- }. ~! k; }5 I$ V8 s9 a" b- U
- let th = new Thread(run, "qiehuan");
+ p% h0 |, l4 Z - th.start();1 b, G- I1 V1 N0 l2 t
- }) H5 p# B3 o6 H) N, F1 O* c
- ! S( e$ \1 C5 J9 U- D; P5 {( n5 D
- function render(ctx, state, entity) {5 G& W$ S h1 D2 X
- state.f.tick();; U1 l/ s) m" A2 ]; I+ P
- }
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- function dispose(ctx, state, entity) {% U$ k. D" G7 `, d2 ^& a, W7 {
- print("Dispose");
) T0 B' f8 Q; ~, p! h1 s$ T - state.running = false;4 x; C' e" K; O- H% T
- state.f.close();
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- function setComp(g, value) {
) r1 B5 D* S4 d0 D# d- J - g.setComposite(AlphaComposite.SrcOver.derive(value));
- I4 I9 T7 d! J - }
复制代码 & Z+ ~# \7 m+ b: 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。) ?, T7 w& [! h) Y
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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)
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