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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。
5 z- v( L2 M x7 _$ ?; v' J# m- importPackage (java.lang);
( W5 m C' S, U: \; n" ` - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));" a) @$ m5 |* T" o% D: H# h! o5 T
- 2 Y7 F( i! W- `( X
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
1 o) w7 n, E {# n; d7 d, ]. r
7 @( ]: Z, r9 p3 q9 o8 m p- function getW(str, font) {
; C6 x- L; S" s4 W, Y" e% Y - let frc = Resources.getFontRenderContext();
4 U" n2 b1 M6 z( M3 Z& l2 D - bounds = font.getStringBounds(str, frc);/ I+ @+ t7 Q, L+ P @$ A
- return Math.ceil(bounds.getWidth());4 n% [8 D) J% v. r0 U8 j e
- }
& }; H; G6 W1 }- a4 N! N
' S! @/ ~- n6 ^8 J- da = (g) => {//底图绘制
# q* K) T4 Y9 g' a _. x/ k' P$ D - g.setColor(Color.BLACK);
# U: ?5 g4 s0 x$ s2 {( o$ k/ o - g.fillRect(0, 0, 400, 400);" h5 t- S% X) N* m | W0 m. j
- }# N; `: X) R' ^
- % X. @: D1 Z% ]' {0 `' q9 t
- db = (g) => {//上层绘制( o2 z0 h! B% K% l) Q. S/ m- c
- g.setColor(Color.WHITE);
5 Q8 B# q0 m" M8 S; F - g.fillRect(0, 0, 400, 400);
% g0 t2 ~+ L/ O( t B - g.setColor(Color.RED); g" {; d& O: F5 B0 T
- g.setFont(font0);
' R0 m2 k, o( Q/ J5 d, V - let str = "晴纱是男娘";
' u- ?! v+ C t - let ww = 400;
. L; ?* d, a4 d- m1 Y3 B - let w = getW(str, font0);
* _1 x( Q# z2 [! z* A1 z- p9 H - g.drawString(str, ww / 2 - w / 2, 200);5 q- A8 i/ D8 y9 h6 g
- }" ~0 s7 v8 b* H% f% M4 s! b
- & A/ w, w8 {" d! B( s
- const mat = new Matrices();
7 N7 g4 h. r v+ O) M& y - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
( Q; o, N6 }, `% {, A8 E, J - let info = {
- Q. L4 h* C# ]9 o - ctx: ctx,& O# D0 e( U8 [4 _+ V8 s1 R( J- s
- isTrain: false,
# Q) c4 u; v! J; |! | - matrices: [mat],
( {6 O, b$ i; \( M9 o K$ R* W1 R - texture: [400, 400],
8 z8 H& b# g5 N. [ z9 e' i8 v - model: {
2 {$ K* E+ Q( |3 c6 a2 X - renderType: "light",
* u: Y2 R# }6 E8 S' T - size: [1, 1],
\+ l9 V3 I" l; g6 A1 @, g' V - uvSize: [1, 1]; d7 B( {+ M$ N. w
- }) J$ e, {* k6 S8 t. F1 ^
- }9 P/ |( Y* R0 x5 X
- let f = new Face(info);; |4 d. r- g& _1 d. T: l
- state.f = f;7 x% y5 n3 d" h+ D2 }! v# r
2 r* H/ r. ?* X) F5 O+ l% k5 v- let t = f.texture;
( j6 ~& A# B8 l1 e3 s - let g = t.graphics;
' k* P0 [' k: a9 _ M2 v - state.running = true;7 [: e; t2 ]% W/ Z$ m# D
- let fps = 24;% S+ c, V" t3 g5 X/ q% j
- da(g);//绘制底图
2 J: f1 [) @! i3 l - t.upload();" r* c) R- I6 d% ~! H
- let k = 0;7 J' W+ k% @+ e" ?
- let ti = Date.now();# n3 k: ~* N4 `% w
- let rt = 0;0 A# _: f; z8 r N, d2 e a# e- D
- smooth = (k, v) => {// 平滑变化
0 w- d, D8 L9 j+ s+ m5 L% j - if (v > k) return k;( D% l- c% k i7 S
- if (k < 0) return 0;
; R: z% N8 V5 b; I& A - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;5 W% h! C/ N; `/ x; T
- }
. L2 X0 F( t# u - run = () => {// 新线程) f: ?7 ?2 H; `9 T; j5 h6 B5 U& L6 S
- let id = Thread.currentThread().getId();" B) ^6 B: m2 h# x5 j3 h. ^
- print("Thread start:" + id);
4 Q i4 Y8 g8 [3 t+ K! G1 W' g - while (state.running) {/ H# W- K$ u! C0 S9 _1 T4 c
- try {! K, \0 V) D2 T
- k += (Date.now() - ti) / 1000 * 0.2;# C% l/ f; W K; R
- ti = Date.now();" b/ {& f# _: R5 q2 \5 \4 k+ P
- if (k > 1.5) {, J$ d4 ]% F& c7 e$ O* ~0 Z
- k = 0;
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- setComp(g, 1);- R* I9 ?% M, k5 `4 T( F& ^. S
- da(g);
/ z/ f( q! G) G( i - let kk = smooth(1, k);//平滑切换透明度% [3 C" W0 h1 x6 l3 u# b
- setComp(g, kk);
s5 j" c) b& r" d - db(g);
7 d4 |/ g2 K- P [ ?8 p9 Q - t.upload();3 O4 Y0 `3 o$ c% }# t
- ctx.setDebugInfo("rt" ,Date.now() - ti);* _2 w0 X. G' y' M/ v
- ctx.setDebugInfo("k", k);# t$ I) u+ Q8 e% c) G
- ctx.setDebugInfo("sm", kk);
! c/ C! R, X5 H, u+ s - rt = Date.now() - ti;9 ^" D8 A" z6 T3 `& Z
- Thread.sleep(ck(rt - 1000 / fps));
+ W7 ~0 _$ Q7 t% ^ - ctx.setDebugInfo("error", 0)8 e1 b; [* x% u2 H$ M# G# I
- } catch (e) {
! U! V( k2 \- ]- l8 S8 u1 ^# I- u7 ^$ C - ctx.setDebugInfo("error", e);
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- }/ a) G0 N* b7 v* `7 s. m
- print("Thread end:" + id);
" J8 `* `- v( S [5 O! F - }
* g. \5 E1 Q2 Y: n6 E' w" V" P - let th = new Thread(run, "qiehuan");' c& }$ y& u5 r% @! }; v4 ]) [
- th.start();
% v& G& |4 ]3 L - }
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- function render(ctx, state, entity) {& e# J: U7 a8 M$ C
- state.f.tick();/ U0 S: W( P) L; l4 n; X# @3 k
- }2 z% K% C0 c3 L2 X$ J
- ! L9 L5 v( Y# r3 o' u% g7 f
- function dispose(ctx, state, entity) {
9 P# G; i) a; w. f! P0 S - print("Dispose");/ D8 |3 q2 _/ {& n" j# n
- state.running = false;0 N& D8 s+ q# N1 S$ Q
- state.f.close();6 ], T, K7 P8 b; W' _. D8 r& ~
- }
]- V- ?9 B) w# t
- e# X3 }2 ~. w4 e1 \- function setComp(g, value) {
\( F0 t( P' z5 v6 d - g.setComposite(AlphaComposite.SrcOver.derive(value));/ K' F2 C: u, C4 Q# ^: q7 Z7 a' }
- }
复制代码 1 q: Z1 N& } m2 {
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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* d7 m& i% o; V顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)" P! B8 V6 o9 ?7 a& G
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