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# Y4 S, s5 O* G. a% d& b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。
1 H: M. b6 U6 }- E* W- importPackage (java.lang);
q+ D" x& u$ z! B6 A0 \6 v& a - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));7 D- r+ c7 r# ]# S
- a9 V* D2 S, _& H3 t- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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. |8 L X! A" K5 ]" T- function getW(str, font) {
" ]* t+ D9 \% ~# S1 U% Z" I - let frc = Resources.getFontRenderContext();
' P- [2 Q7 S5 d* g- j r6 Y# v: K - bounds = font.getStringBounds(str, frc);$ Z4 ~( K2 h/ @/ b
- return Math.ceil(bounds.getWidth());
: s" _9 ^8 T! k5 _. o - }, p2 ]( Y+ B/ d, }
) j! z: v" O# |- I, u2 X/ N5 `+ @- da = (g) => {//底图绘制
+ _7 l m7 v0 B! m% X% Q - g.setColor(Color.BLACK);
8 R% _" K3 i% ]5 X% O0 ?" ^ - g.fillRect(0, 0, 400, 400);
" d3 p7 Z* A+ Q5 M2 G( D - }0 X f9 t5 O4 l4 g- G- |3 P1 x
! p% _% m; }+ u* ^% h( C( K- db = (g) => {//上层绘制
3 b P0 x4 B* A: z; c - g.setColor(Color.WHITE);
$ `+ [! Y `, r" v, S - g.fillRect(0, 0, 400, 400);
: t4 w# q+ B3 {. k% E/ W - g.setColor(Color.RED);
7 j9 Y r% I7 ?& p3 }% ] - g.setFont(font0);
- v* X: t) ]/ c+ T - let str = "晴纱是男娘";8 c: }% [& k g
- let ww = 400;* ], z8 \* S1 o C
- let w = getW(str, font0);
/ ^/ @/ N+ l6 q3 O$ n6 c. `7 ~2 |; P# j - g.drawString(str, ww / 2 - w / 2, 200);4 a- _) |7 s4 U8 r& s8 I2 ^$ n
- }
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- const mat = new Matrices();
; U* E$ B& a2 ~2 C - mat.translate(0, 0.5, 0);1 ]1 |+ Z P8 i' L9 R- \
% W* O) Z( V. y. U" j% z- function create(ctx, state, entity) {) W. i7 d3 F& ?3 F3 M4 P0 b
- let info = {
& D6 Q2 l0 i5 v( g3 v# V - ctx: ctx,9 T& f6 m& }. Z" `& b6 g! j
- isTrain: false,, i$ S) l; g) R. y% @! g, D: `
- matrices: [mat],; N; d+ C0 O" T4 J+ {" C: f+ b
- texture: [400, 400],
% y$ u0 F. _/ O. S1 g - model: {9 C! Q7 W+ _5 F2 `
- renderType: "light",0 G( d( w& E t' c7 B# c& D4 k% l" B
- size: [1, 1],
% _( K) U, v7 A0 f - uvSize: [1, 1]
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- }( I, X$ b2 C) a. B
- let f = new Face(info);, Q9 F1 v2 a. i! l$ b! ]
- state.f = f;
7 i' _# r4 J, g- e) X4 z
, \3 ~3 w: D+ A' w% r4 p Y* T" I6 X$ c- let t = f.texture;
/ J; ~+ M2 v j7 |& j1 a - let g = t.graphics;
% V( f8 x! n+ w - state.running = true;
3 G \9 y5 J) P! Q2 u - let fps = 24;
# b3 h" D, o& p7 e) @ - da(g);//绘制底图
/ F6 `7 M, _, F; [ - t.upload();
: W& p- m; k/ K, u1 C3 t* j - let k = 0;- ]. B5 K! C, {
- let ti = Date.now();
+ x s R( \+ D; R7 ]- H9 I - let rt = 0;
1 {" G1 e; ^* Q* i7 v2 X - smooth = (k, v) => {// 平滑变化1 [4 o0 R: m: ?+ v! f6 c- I( N1 k
- if (v > k) return k;: `3 L, I9 r& W6 W
- if (k < 0) return 0;
. r. o, s8 @. [ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;4 n$ S% ~5 w, J% J) p* X& T8 w# k
- }1 D* d" ]* B4 U8 ]
- run = () => {// 新线程
& D1 z% M, ?: x7 A* c - let id = Thread.currentThread().getId();) e9 l- @' J: Z1 o( O
- print("Thread start:" + id);
6 i" T7 ^6 N2 U$ B0 y: q - while (state.running) {( r1 a8 x) u& y( q4 N4 q2 m
- try {
. J9 g7 j/ e& v- R I* ?" u: _, J - k += (Date.now() - ti) / 1000 * 0.2;# t7 q9 ~3 u' R! B9 D1 }3 N
- ti = Date.now();9 Q& a/ M0 ?# a4 E
- if (k > 1.5) {
. q$ X3 E+ u( H- [5 G, M& A - k = 0;* Q$ u, o% J& S5 m, r
- }
3 m6 c q0 d+ Q3 e w( e0 B' g - setComp(g, 1);. V; W$ f: b G [/ X, y
- da(g);. z" @- C. ], \- a4 f& L
- let kk = smooth(1, k);//平滑切换透明度
1 B F7 U1 I. k' |9 Z1 B. t% r2 I; f - setComp(g, kk);
) I; N, ?! h- p* G1 b" J - db(g); x5 h+ t* O$ v
- t.upload();& V+ ~- T( j1 z N, a4 Y$ D
- ctx.setDebugInfo("rt" ,Date.now() - ti);1 J# {+ [! v+ C& z. V! B0 @6 V
- ctx.setDebugInfo("k", k);7 N5 K+ U( e$ A1 H
- ctx.setDebugInfo("sm", kk);
8 l7 Y% b/ V% p( D - rt = Date.now() - ti;6 j2 |! M' h* C) `$ l3 G% v
- Thread.sleep(ck(rt - 1000 / fps));
d. J. b5 f# }7 I8 g9 o0 n% X, L - ctx.setDebugInfo("error", 0)! c. `, s% l! K4 h) [6 M1 {6 J
- } catch (e) {; N3 D5 p6 I. _1 Y9 G. T, E
- ctx.setDebugInfo("error", e);
) K: q4 u w, r% |! R+ C" P - }" I9 c! _: ]) i6 Y3 u L% L
- }
+ \% M0 |* a3 R% I+ R - print("Thread end:" + id);$ D0 I& a5 W# H6 M: e- S6 K
- }$ R0 T' W% d: J* Y4 n0 G$ F" }
- let th = new Thread(run, "qiehuan");
0 L# c7 W" X, Z k - th.start();
' S; ?! T6 ~* T! X- w, ?% h* N - }1 d/ u f- T: w; l2 W. `8 B
4 p! Q6 F9 j8 B- function render(ctx, state, entity) {
9 ^. T; `2 `. D( _( B - state.f.tick();4 h* t- o- F0 y+ o+ s2 _
- }3 S6 q4 V; ^( o S
5 A; U' f% l% H; q- function dispose(ctx, state, entity) {& Q* n% T6 b( x. K5 h
- print("Dispose");
- w- S& g1 C. B9 n% S4 O8 c1 i - state.running = false;
/ |, n! ^2 l2 W8 d/ X - state.f.close();% o1 i1 R4 F; H, i4 f: X( u
- }
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3 A/ o5 T% ?: ?& h- function setComp(g, value) {2 R! f, C: N- A6 s" n( x( H& I
- g.setComposite(AlphaComposite.SrcOver.derive(value));
& F" P8 [, i$ p* X4 j y - }
复制代码 + l0 o+ D7 S) ?' M
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)
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