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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。- i! u) h7 S4 N9 R
- importPackage (java.lang);2 A8 B+ L z: y
- importPackage (java.awt);4 u2 L, O9 Q& U, B0 [5 c
! r/ @ Y ?; Z# y- include(Resources.id("mtrsteamloco:library/code/face.js"));6 Y+ t7 ]9 c- w
- % B7 L7 A% `& ^ m ^$ s
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
. U5 C1 e, q5 S& D& H; w2 K - let frc = Resources.getFontRenderContext();! r2 {. W6 z2 H% v1 H- d. f
- bounds = font.getStringBounds(str, frc);3 d4 p# t4 ^+ b3 w
- return Math.ceil(bounds.getWidth());
2 D8 x& C. T+ o7 U4 f: Q - }
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- da = (g) => {//底图绘制" @2 i( j( h7 d4 | K+ D
- g.setColor(Color.BLACK);7 ~; c; i# W0 I7 _* ^0 c+ R" t
- g.fillRect(0, 0, 400, 400);6 V9 L, E. B# A" o9 p5 ~
- }
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* l: I5 L. S8 g7 H- db = (g) => {//上层绘制9 u: l# O8 V, ]. M
- g.setColor(Color.WHITE);# ]" y! f/ v4 K/ ]- s
- g.fillRect(0, 0, 400, 400);, W& F2 S5 X( g" n' y
- g.setColor(Color.RED);
" E, B: G# Y# c0 X9 p0 N! p; i9 G/ D: N - g.setFont(font0);
+ z. ?+ O! J) E+ k - let str = "晴纱是男娘";( E3 s _5 K5 a$ d/ m
- let ww = 400;
: A' s" B7 D' T j* S: K - let w = getW(str, font0);% W! n2 ?3 l: J9 A T
- g.drawString(str, ww / 2 - w / 2, 200);9 J2 v1 {6 t/ l2 d
- }# \% t8 w7 z' b& m
- 3 r6 x# E ` j
- const mat = new Matrices();
' H3 ^, ~1 m, y: w - mat.translate(0, 0.5, 0);$ N* ?$ B: z$ O: b" M4 t) w0 S4 c
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- function create(ctx, state, entity) {
8 p' V. N' N: O" O+ h: Z - let info = {% U" |, @, A# ~% R
- ctx: ctx,
* u% L: c* p- ~ - isTrain: false,
S% n8 i Q- V2 [5 n H; H$ Y# ~# k - matrices: [mat],
^" t& b3 ~; g7 p0 o - texture: [400, 400],
: L' H7 x9 F- {' g# E! x& Y - model: {; }- b7 t5 `* Y+ d
- renderType: "light",# G' w- }" l4 ?3 {
- size: [1, 1],
) k- Z: h8 \0 q& J' a) Y6 I4 e ` - uvSize: [1, 1] e8 C* i2 J5 G3 A0 P0 @* Y
- }" ~# Z$ Z2 ]5 i C! L3 P
- }
7 i! e5 H" ~$ S6 m - let f = new Face(info);
$ m# Q6 K" X! Y: b; Y - state.f = f;
( \+ j2 e* H' z2 b, x - ' m' c1 }; p9 U9 ~4 K" r, S
- let t = f.texture;
" x; J- `" {1 g5 y; _; o( Y - let g = t.graphics;2 K2 F6 h0 H; a
- state.running = true;
3 L3 L' s8 P% i) l5 J: k - let fps = 24;$ C! I0 H, }/ j
- da(g);//绘制底图
; r: O, h9 t1 b V5 J( p7 M' z3 `0 p1 [ - t.upload();- B- d6 G$ W4 I; _/ O
- let k = 0;1 b" Q( j# M- O
- let ti = Date.now();
! u6 r$ u* N ^; A1 W- R @) t5 e- x - let rt = 0;) E! W+ V* ~: K+ [" X7 T
- smooth = (k, v) => {// 平滑变化0 ?- o, ]& G" |% m. K+ L
- if (v > k) return k;
4 w, W+ j0 I" B! Q: | - if (k < 0) return 0;6 f! K3 c0 K+ U
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;% R+ v' p( v8 a" T
- }( {0 |4 ]0 k7 ]' M, H* F7 `0 H
- run = () => {// 新线程3 H5 M' x4 Q5 `7 P4 W
- let id = Thread.currentThread().getId();. `3 y7 U7 r$ [6 @
- print("Thread start:" + id);; N/ K* k$ N# \3 V1 w5 @' [
- while (state.running) {2 u% }8 J* S) D! I8 w
- try {
) r: N8 I1 F! Y* g/ x - k += (Date.now() - ti) / 1000 * 0.2;
' t3 y0 `* i' m H, e - ti = Date.now();
! p# m' X( L8 L* _; ]( p - if (k > 1.5) {
1 m8 u! f) w( B - k = 0;& z9 W1 _- _3 w, N0 s& ~
- }
0 V+ }5 f5 z3 v$ A% S( J - setComp(g, 1);
6 n( u0 g: B9 s9 O- s4 r( j) m - da(g);
K5 r8 V+ a* ] - let kk = smooth(1, k);//平滑切换透明度* b: |' m; ^+ R* m3 N& R
- setComp(g, kk);9 h. I# Y' A8 [( Y
- db(g);8 ^4 ~% U7 o: s6 g$ Z/ b
- t.upload();
! ^' c; }* t- }% x \$ {" m0 S - ctx.setDebugInfo("rt" ,Date.now() - ti);" g$ I$ M O+ i( P/ ^! C
- ctx.setDebugInfo("k", k);: w$ n- h) m1 m) w
- ctx.setDebugInfo("sm", kk);
5 o; V6 {1 Y/ H1 x' p: U! K) a - rt = Date.now() - ti;
$ D/ c. ?, O+ `+ E# | - Thread.sleep(ck(rt - 1000 / fps));
5 l( E5 j, u+ k - ctx.setDebugInfo("error", 0)
- X1 H. |8 G% p - } catch (e) {
( ^0 ^. }- V2 N$ [5 V - ctx.setDebugInfo("error", e);
+ U; m, z: ]* u/ h8 \ - }% J6 j0 T' s% o, E4 Q# J9 L* A
- }
9 z( b5 m4 J' f$ u; f. x - print("Thread end:" + id);! F6 K$ i8 x. P7 Z n' _" L$ \
- }
7 m. J* H3 `; d# B - let th = new Thread(run, "qiehuan");
6 q, ?- i5 m) _2 M; H - th.start();
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- : p1 ]! p. W$ P4 |1 P" N" \5 D
- function render(ctx, state, entity) {+ d) e+ B( g0 X8 ^& F/ v
- state.f.tick();, M4 ~/ R$ K) ]
- }4 z! G7 }; M2 u( N, n; u8 {! B" K
- - k% X& a& v2 v1 ?( b x
- function dispose(ctx, state, entity) {
8 S# W3 @; H, O! J3 J - print("Dispose");
0 d6 \3 [3 w+ p( r, K - state.running = false;
1 d/ Q$ Z* W" e5 G2 A; O5 u! f - state.f.close();
' l) ?# E' f( m; h5 F$ g - }
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- function setComp(g, value) {
% z% f& ?% i) l- @- w% Y4 T - g.setComposite(AlphaComposite.SrcOver.derive(value)); h# \6 A4 D: c" z# C% Q5 }( ]
- }
复制代码 % |7 X2 x+ R- p' I
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。
* r. h/ g2 ^0 Z+ _4 |% j, g) p* I% Q3 f& ~
: c" M1 h. ]" G; f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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