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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。4 }1 R$ h) ~$ B; \9 w
- importPackage (java.lang);5 m6 [0 n/ w) T& @9 T" D
- importPackage (java.awt);
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G* |( s5 J5 k$ `! k0 ~" I- include(Resources.id("mtrsteamloco:library/code/face.js"));
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$ C4 E( E; F. @7 t- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);# \/ r R& D" U/ P# i( i
- $ `: t- E% q/ Y
- function getW(str, font) {
& k c# u" I' | - let frc = Resources.getFontRenderContext();
4 ?4 V( t1 k" B O2 o, k2 S - bounds = font.getStringBounds(str, frc);
6 m- g ]7 r: T: d7 g/ n - return Math.ceil(bounds.getWidth());
9 P# y2 ? n8 b9 L" ^ - }
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3 M! }# k2 G3 n' t# c1 [$ C- da = (g) => {//底图绘制# R$ O+ b, L+ l
- g.setColor(Color.BLACK);
' l- j% f) L- w) G, F2 L. i - g.fillRect(0, 0, 400, 400);) }3 o X2 y( q* \
- }
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8 a1 c* G# c: z8 ^- db = (g) => {//上层绘制9 D' H" z! G7 n" X3 ~4 S
- g.setColor(Color.WHITE);$ U9 D2 R/ Z/ Z" |( l" u) q& B4 e( _
- g.fillRect(0, 0, 400, 400);- O/ B- ~) {, [9 T$ D' U0 `* x5 e
- g.setColor(Color.RED);
3 N0 J9 M0 c* i2 t F; q - g.setFont(font0);
! X+ i+ Z. g9 c+ b" _5 e8 ~ - let str = "晴纱是男娘";( k1 c \, V' }0 B3 r6 I
- let ww = 400;- [" d* q: L5 g% N6 P* ]* C& G2 q
- let w = getW(str, font0);( J" s$ {" W( Y& ?" x( c
- g.drawString(str, ww / 2 - w / 2, 200);' b0 t2 {6 j9 a+ U. N
- }
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- const mat = new Matrices();
) F8 k1 m4 k, b: U7 p" P - mat.translate(0, 0.5, 0);
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4 e# U y2 y: I/ \- function create(ctx, state, entity) {
% D, x3 x% ^5 k - let info = {3 {) o, Z3 ?+ |% P' W
- ctx: ctx,3 j$ g5 F$ F- y
- isTrain: false,4 X7 c3 G1 R* q* h
- matrices: [mat],* j( x- n0 z+ c5 u2 k# ~8 w
- texture: [400, 400],% t' i0 ]/ F1 D6 C. Z
- model: {
# Q. I8 {0 p7 x. y7 N* A9 q9 R - renderType: "light",
, h& U9 S. m, T/ v9 U, x - size: [1, 1],1 x, H5 V5 w* _' t+ L5 Y! p
- uvSize: [1, 1]
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- }
) r& E1 g/ M2 F6 {5 a7 `/ _ - let f = new Face(info);
7 w% E* U' G2 `1 i) `9 E( M% L - state.f = f;; l! \3 X/ L2 p: \' Z
! L! m0 C) b8 V6 h. O. F- let t = f.texture;3 c0 O4 z% z9 ~! o. i/ b+ q9 O
- let g = t.graphics;1 z- e0 o% u: E, S$ O/ k+ l
- state.running = true;$ [0 L9 P& I2 X' m: m' U6 p8 x
- let fps = 24;% L- P9 g) X6 D- S9 a, j! o
- da(g);//绘制底图
) Z* g/ t7 ]$ e9 K3 V2 j# i0 q - t.upload();8 J/ @% D' e+ e. I6 u
- let k = 0;! ^/ Z C. O, W- I
- let ti = Date.now();
% E7 K7 X1 C% V- v) c - let rt = 0;7 w4 ^; {. {5 s# J
- smooth = (k, v) => {// 平滑变化& G7 w! l5 @; c5 I
- if (v > k) return k;6 F# w- Z1 H) h( |
- if (k < 0) return 0;
: `) p2 x/ w1 C" h - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;; E; o$ N+ a& K
- }1 b+ F; C; i3 j) ~" w/ a9 @
- run = () => {// 新线程5 o! K6 }0 W9 N
- let id = Thread.currentThread().getId();9 { k: _9 p o4 A& z1 r% N& W
- print("Thread start:" + id);
- }8 D, X% Q6 p% o; J$ {8 { - while (state.running) {
5 I" _' c# n9 a1 c l% {. R$ i - try {. B' v$ F1 S5 Z4 Y; M. w
- k += (Date.now() - ti) / 1000 * 0.2;
, L) G/ d& q0 M: ^5 y g) c* A - ti = Date.now();
( j' |! ^2 `, k; `. z& T/ k0 w' B - if (k > 1.5) {2 ~4 a# c( e3 I! G: P* b% M' d
- k = 0;8 K. m9 p7 s" E9 O- Q( M6 ?
- }8 ^2 f( |' E' {4 ]
- setComp(g, 1);
6 J t/ |2 ?% [ - da(g);
4 H- _& }3 }1 G. _. K9 r ? - let kk = smooth(1, k);//平滑切换透明度0 z$ T) f0 S4 i& _: y# B- L
- setComp(g, kk);
, Y+ O9 i* `/ {0 q - db(g);: x1 h' z6 R5 k8 T
- t.upload();
6 v! h! M% Z" N! v( h- c7 d' f- L+ L - ctx.setDebugInfo("rt" ,Date.now() - ti);: y1 L1 |6 D' D( A" W3 w
- ctx.setDebugInfo("k", k);
9 O) ~7 l& H* Z) c# C2 i: r% H - ctx.setDebugInfo("sm", kk);( `5 Y( L+ D' Q% h4 t2 x
- rt = Date.now() - ti;) c" [- V# H" C1 n$ i
- Thread.sleep(ck(rt - 1000 / fps));
& q. A0 ]4 L( } - ctx.setDebugInfo("error", 0)6 P* e& r; `* y% H0 L% N6 @. z
- } catch (e) {
2 k2 W/ M% N/ m - ctx.setDebugInfo("error", e);
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- }" ^; g: q: Z# T: i+ _
- print("Thread end:" + id);
& {1 R7 x W. W( O( O - }
' o5 H* y# H% I! ?8 e: c- _) g1 D - let th = new Thread(run, "qiehuan");5 Q6 U- v. x8 d, p9 H
- th.start();
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- * z: T: A- T5 L: c9 w- H
- function render(ctx, state, entity) {( {8 P6 F. G2 y0 S8 Y; ^- Q
- state.f.tick();: J& m9 E3 q0 L& D8 v% M
- }+ T! f2 K% [- K5 E! ~# [6 `4 v
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- function dispose(ctx, state, entity) {
1 P4 Y1 S8 t1 j- V+ L/ L9 X - print("Dispose");3 ^( ?7 I& Q: V; b2 i3 l) r
- state.running = false;
/ ]9 K3 X9 b) C4 ` M( s2 |9 [* M - state.f.close();+ [0 j( @( k& ~* e( I8 P7 i: H
- }
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: v; \7 L: f1 _2 [- function setComp(g, value) {, G' E0 I! j' S/ h" y2 ?, z; d. j+ X
- g.setComposite(AlphaComposite.SrcOver.derive(value));; r% r& y5 @; o$ F5 F- V3 ]
- }
复制代码 * g2 D4 I! v& Y
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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5 l% _- E4 e, y' }- t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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