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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。
1 ?! Y# d6 G4 q: a+ B4 q) M- importPackage (java.lang);
6 X' x& d8 p8 f3 e1 r - importPackage (java.awt);0 T3 ~( x' O& |' S
$ U% ~" L: w, v$ ~- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {( F! @. p" {9 i. I
- let frc = Resources.getFontRenderContext();- s( |( [. l/ x
- bounds = font.getStringBounds(str, frc);
& I- E* ?/ b9 }, `" }0 w, @4 R - return Math.ceil(bounds.getWidth());- ^: f4 X- R6 L( N& `
- }
+ ?4 n4 [7 ~2 y% d5 W8 @+ B
: G0 F) {( c( I- da = (g) => {//底图绘制
0 ?9 o# n! J; u4 v - g.setColor(Color.BLACK);
. ^5 o8 g5 N$ C, t& R - g.fillRect(0, 0, 400, 400);: C2 T% R* @4 t! |8 G9 s1 k5 {
- }+ x9 B7 P+ H# i5 h4 f! A
# Q6 l" H/ q4 U) k4 `- db = (g) => {//上层绘制
2 |) k+ r! ]: A, [, } - g.setColor(Color.WHITE);7 j6 Y( f/ X3 h, c
- g.fillRect(0, 0, 400, 400);- |. R; L) I; q& p# g
- g.setColor(Color.RED);0 E, C9 C1 [1 s2 i
- g.setFont(font0);" g9 R; N' f4 [" Y% C& _6 b# o( W
- let str = "晴纱是男娘";
4 a/ r! z5 j1 W) z2 I - let ww = 400;' ^% x7 D" {: ~, {
- let w = getW(str, font0);
u5 ?# d! p! _& r: x8 P1 S& X2 K - g.drawString(str, ww / 2 - w / 2, 200);- q: b5 ~7 p7 K! S% j7 @, u( ^6 c i
- }
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- const mat = new Matrices();
% Z2 } B6 m; |( p" W - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
7 @/ @1 f: q; x* t9 N, K - let info = {, J& E4 h: z" |
- ctx: ctx,# H* R5 V( w3 G4 {
- isTrain: false,4 z) W3 V% H8 |
- matrices: [mat], z$ u5 `( C0 F; T7 L/ p
- texture: [400, 400],
. ]- X, ?4 @) Y( n0 A8 H K - model: {
) j" L% f$ B x1 f( X9 N9 F/ p$ A - renderType: "light",8 g! ^3 K9 L0 J. A& \
- size: [1, 1],+ J; J C% \5 Y p# S; z+ s
- uvSize: [1, 1]+ T- }. Q# t0 a* B Y
- }/ t, Q; w7 G A8 ^
- }
2 u! P, u( L$ n0 T5 B% S+ F/ o. v! X - let f = new Face(info);8 |9 \0 H! K0 `* h4 |3 z0 M
- state.f = f;
! p* X$ u7 x7 f: N - - v w3 q0 |+ E7 C% I3 J- K
- let t = f.texture;
' | U; j- C" O' \# E - let g = t.graphics;9 _% x; r* b: Y0 g4 x7 h; w
- state.running = true;5 @) i6 O+ ^" A
- let fps = 24;
2 L" a! m% q$ C) k2 d - da(g);//绘制底图 ]6 ~+ g/ Y0 p, ~6 H6 v' W1 F
- t.upload();/ N$ k& G/ T- c$ i1 q
- let k = 0;
& K8 b3 V; a- V& a/ } - let ti = Date.now();
" T7 I' N/ C1 W5 Q' D; M - let rt = 0;4 C8 Q4 `* `; p. a: E
- smooth = (k, v) => {// 平滑变化! r5 B b2 b1 ^5 ~9 O
- if (v > k) return k;
( }& f+ U$ q) y - if (k < 0) return 0;/ r) U( P+ N3 _7 }- X
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
/ w$ E+ K6 k' [* [% X6 u- V/ t( h- _! I3 p - }
& `3 t1 U; J V) M2 w9 @ - run = () => {// 新线程
" ^4 M6 ]0 ?# [* u# U" L: T' R$ B - let id = Thread.currentThread().getId();
. o' v( V. y1 z t5 [ - print("Thread start:" + id);- m+ }% t. F6 d4 ~& U* n6 S0 n
- while (state.running) {
" U# R' N5 G: ~* ?8 ? - try {6 v* o$ t- A1 L$ O9 ~; p6 y
- k += (Date.now() - ti) / 1000 * 0.2;
# l0 t' @2 `2 C' n( f- K - ti = Date.now();
3 \! x# ], R A - if (k > 1.5) {
# g0 d6 G. W6 ? S - k = 0;. b! D# D3 g7 j* I0 @, B% r# L- o
- }8 H8 \& B( r7 I# w
- setComp(g, 1);, Y7 F8 u- O5 \( r3 A- \. W
- da(g);
( M5 n5 v! _* e4 b7 F5 ?' ^ - let kk = smooth(1, k);//平滑切换透明度
1 m B! L+ f P - setComp(g, kk);
: m% E) ]. M: ^3 z' l - db(g);$ T, y9 w2 x% X5 |, K. }
- t.upload();5 v( u# w6 N& X
- ctx.setDebugInfo("rt" ,Date.now() - ti);
i J2 p4 \5 X1 c - ctx.setDebugInfo("k", k);
* J/ s# v1 {/ x$ T" ?) }# s' w - ctx.setDebugInfo("sm", kk);- [( j" Z" I7 I+ Q0 w
- rt = Date.now() - ti;/ V5 S( A _# ?# B n- U
- Thread.sleep(ck(rt - 1000 / fps));9 M4 w D" [$ t j/ x* _: K6 z
- ctx.setDebugInfo("error", 0)
/ U; {5 L8 X6 n7 D0 R7 S: ? - } catch (e) {
; @) K: }+ d/ F5 N6 v - ctx.setDebugInfo("error", e);
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- }9 U& ?" `+ b7 Q' d
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");7 ~" z- y* m; e2 Z
- th.start();+ Z7 q J; {; g% ~4 @' ^
- }6 Q) |3 |* v& N
( C* z" }. K7 }' k, S; K- function render(ctx, state, entity) {
: _$ R8 ~% g* r% s, w( L - state.f.tick();+ K* g0 D1 B1 B7 t% |3 _ F. @
- }
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- function dispose(ctx, state, entity) {
( f8 S. V$ _" p% J - print("Dispose");
# O6 U6 K( L) D# t" ?. q. b+ I - state.running = false;( j3 W& ?8 u+ K- x
- state.f.close();
# b% @ G6 f- y5 }, o* n( { - }
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( @6 x) j% i1 U# m- function setComp(g, value) {
) D, f( u7 _! q- \" W - g.setComposite(AlphaComposite.SrcOver.derive(value));
: T, ~! z% _" V5 q5 a4 a6 s+ T - }
复制代码
$ H3 {# ?9 l8 n. @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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% P: L% f. R3 L( C0 a顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)9 [$ F) S8 h% |% a) k
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