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. Y: k1 [; g ?, m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。6 j5 K+ H9 N' r7 W
- importPackage (java.lang);+ ~$ b# |, }* k1 e
- importPackage (java.awt);
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& A6 S! Y) o2 F$ {4 `" T2 b5 Q- include(Resources.id("mtrsteamloco:library/code/face.js"));
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5 i; s. R& l2 K1 q- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {" |5 s3 O; f" I" j% @/ d
- let frc = Resources.getFontRenderContext();5 P+ ]3 h" l f, K
- bounds = font.getStringBounds(str, frc);# P4 k' v t- y I7 [3 a
- return Math.ceil(bounds.getWidth());' e$ J) h# ?8 P8 Y
- }, i5 C. E+ l1 g# B) K4 v! S
: M4 ^1 }& ]) x2 e7 _ ?& \- da = (g) => {//底图绘制/ r- U; ^/ ]; `
- g.setColor(Color.BLACK);4 x# ?( O' K. H9 H. y- A* e: X, p% |
- g.fillRect(0, 0, 400, 400);6 K4 {2 I7 U6 V' d( x
- }
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- db = (g) => {//上层绘制 @6 b1 G0 F1 v) O' D8 X
- g.setColor(Color.WHITE);9 O4 s8 j5 d1 {0 Q3 g
- g.fillRect(0, 0, 400, 400);
+ S' N8 n. e# n Q - g.setColor(Color.RED);
5 g: Q' ~! h6 A - g.setFont(font0);
: L+ z2 @3 i0 k - let str = "晴纱是男娘";
, E8 ~& x J1 S0 i. E - let ww = 400;$ t4 d- D' A+ A i4 E6 F
- let w = getW(str, font0);
* i$ z7 ]! ~) H# F - g.drawString(str, ww / 2 - w / 2, 200);
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# v6 Z' e1 L1 G6 l& E- const mat = new Matrices();2 Y% `$ Z. z- P) P
- mat.translate(0, 0.5, 0);
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, _& h6 T4 ?+ n1 v2 C" ?$ o8 h) N) S- function create(ctx, state, entity) {
# @8 ~) [3 Z( ^ - let info = {
' t$ G, H2 c* s/ s" a- H; X, n - ctx: ctx,
, U% r( | }' r& c4 D& [4 \ p9 ^* f - isTrain: false,
8 L0 W/ M+ _) ^' [- @. O+ L - matrices: [mat],1 ?* S5 j7 u$ u# |; m- N
- texture: [400, 400],' h, i1 I0 J5 v; h; W. N
- model: {- \8 F3 v6 c$ y9 {; m/ D
- renderType: "light",
, P. V/ e8 s ~& m - size: [1, 1],
) \; t2 L! O$ Z% k4 b; q* j2 r - uvSize: [1, 1]
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- }" O5 c/ T; t' Y& h, K
- let f = new Face(info);2 }! ]" C' ^% W# {2 a% H
- state.f = f;
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- let t = f.texture;6 p8 f c0 [6 q- Q; u! O) J4 u9 j
- let g = t.graphics;
5 k* F3 _/ \) L - state.running = true;
8 p& |/ [, r+ J) D0 s, S- Y7 B* z$ e - let fps = 24;, p( G q- C# b& j3 F) a$ A
- da(g);//绘制底图) `7 w% G: `7 e T" F2 X0 |
- t.upload();
1 Y7 c4 t# n/ k. _ - let k = 0;: Q4 ~/ T! d$ n G8 o3 G* Q5 X
- let ti = Date.now(); S; x) ~- r5 {
- let rt = 0;
# B6 L; A m. d$ ?1 p. k - smooth = (k, v) => {// 平滑变化
6 e! s8 e# \* J6 H j! s. F/ L - if (v > k) return k;3 ^ n5 B; o; h8 i6 H0 q
- if (k < 0) return 0;! M1 |) f5 E7 t9 I, }% t' b: K! ^6 E' }
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
% L$ V" g) ~, K9 b1 T1 Z - }
: s7 ~1 s: k$ X - run = () => {// 新线程
) S- x7 K6 Y4 {9 t; Z! o - let id = Thread.currentThread().getId();/ l8 J! R, w; g
- print("Thread start:" + id);
3 q$ ^' b' r6 }1 n) f9 @ - while (state.running) {
6 X' h# x5 _" D0 J$ f; x - try { K" R* _+ p& n# Q# @7 |) g
- k += (Date.now() - ti) / 1000 * 0.2;4 K8 ?& M) J0 i/ X5 L
- ti = Date.now();) h" |0 j, F/ W) O8 u
- if (k > 1.5) {" q; _3 \+ z9 l7 \) s( s
- k = 0;
# U* T4 @; u# Q; {3 ` - }
7 E: k1 F2 z5 E% w- w - setComp(g, 1);
' g7 f6 U7 t' O) @5 F - da(g);
7 R2 a9 P7 e+ K6 O2 w - let kk = smooth(1, k);//平滑切换透明度5 e+ L$ o6 C) t$ ~" Z
- setComp(g, kk);
% V1 H* o6 P# Q9 c3 F, V- o* H - db(g);
8 T$ q( G9 d. I0 K% l - t.upload();
* S2 V6 B4 F% P - ctx.setDebugInfo("rt" ,Date.now() - ti);
: b/ m* S X9 \ - ctx.setDebugInfo("k", k);; K T8 c+ c! ^* M8 r9 m8 u+ Z9 L
- ctx.setDebugInfo("sm", kk);) }, I- F- U. R o# v% D9 \, O
- rt = Date.now() - ti;
$ b% F" m$ V5 Z( H+ T' e - Thread.sleep(ck(rt - 1000 / fps));# j; h% _6 V: D' b, \
- ctx.setDebugInfo("error", 0)
/ \: E7 m* n, q - } catch (e) {
[8 ]: a# [3 Z( V1 p8 [8 d - ctx.setDebugInfo("error", e);
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- print("Thread end:" + id);/ C9 W6 g) ]+ d: `* d
- } M: E! ]. M8 S+ O# `8 t; x
- let th = new Thread(run, "qiehuan");
: M# Y5 q) J: x. c* } - th.start();1 ^9 k- f; z3 ~" p$ N& N& A
- }
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- function render(ctx, state, entity) {1 Z. g# t; ^5 w4 p4 I! K% e5 _' q
- state.f.tick();
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- function dispose(ctx, state, entity) {
* y i% [# R& P+ L9 x5 R4 ? - print("Dispose");
# H2 N4 C$ e9 A% Y7 n - state.running = false;# k5 B1 F* l8 [- _
- state.f.close();4 H7 O& ~7 ], k# a. `. h
- }
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- function setComp(g, value) {
# y: c! O2 x0 k7 m - g.setComposite(AlphaComposite.SrcOver.derive(value));- M+ u B/ z- I% |) H! \
- }
复制代码
! L7 I) c C# k# f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。0 ?( G9 w* `! J2 s
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1 A: c4 z# F$ W3 l7 M顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)( V" [% s9 ~5 `7 n8 V! I" d" W
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