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. i% p2 k$ y. q# Q e0 x/ 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。( l! g7 l: G7 h1 h5 o5 g
- importPackage (java.lang);
5 p" g5 w0 y8 A3 @ - importPackage (java.awt);
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2 u4 J9 F/ W4 F: ]- include(Resources.id("mtrsteamloco:library/code/face.js"));
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6 D8 t+ I1 z5 A7 y- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- E- F# Q2 S1 X) t: d, m" q- function getW(str, font) {
! U/ j% q% b( k0 J - let frc = Resources.getFontRenderContext();; s/ \) y" B* U2 Q6 V3 L4 Z
- bounds = font.getStringBounds(str, frc);
- C/ k/ V6 a' U - return Math.ceil(bounds.getWidth());
9 c* p! s3 ^! L0 C; ~1 L - }
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. i3 O3 i, U K. v. r( L% Z- da = (g) => {//底图绘制
3 [* u: s/ z9 i9 r - g.setColor(Color.BLACK);
1 m5 X2 [6 q. }& e! m" o0 x2 \4 |. R - g.fillRect(0, 0, 400, 400);
, e c) I: M j! l% U - }
! L& G* R1 o( ?' ]( Q _6 h( h$ b
: ?( f: F; d1 ?% p# D# J+ y- db = (g) => {//上层绘制
3 E& b1 J0 s5 | - g.setColor(Color.WHITE);, V' t8 z. h' G3 n3 D P
- g.fillRect(0, 0, 400, 400);
6 W$ v0 b6 v# u+ ^2 Q - g.setColor(Color.RED);6 t8 M3 s5 B: c U* H+ ^' h
- g.setFont(font0);
% v8 w4 A, T" `' {1 r - let str = "晴纱是男娘";
; y- L2 ^2 b- R* w' L1 B - let ww = 400;
' k9 I" Z" O- @7 ]4 [6 v5 y2 M! Y `9 Q - let w = getW(str, font0);+ D3 n9 W A4 q" z7 c; `
- g.drawString(str, ww / 2 - w / 2, 200);
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: |9 O) G1 q& `3 h( p* w- const mat = new Matrices();) R0 W9 z& P5 U4 E8 d$ x
- mat.translate(0, 0.5, 0);- f: X% U- S' P/ ?
- : j3 l: _) B" f" c4 R+ G: {, |1 q
- function create(ctx, state, entity) {
& I7 d- p( e/ | V C - let info = {
; j- a: W/ Z3 W9 L" T' A - ctx: ctx, } g3 z( U1 N* N/ I5 O
- isTrain: false,5 j2 b9 @% ^( O) g I7 `# ]1 r
- matrices: [mat],
( V/ r# B0 x5 Z! T8 k) ^ - texture: [400, 400]," ]7 M% b- s: R; y; g$ M9 P
- model: {
( C2 l I0 O; N/ U - renderType: "light",2 u2 M, Q! s) O( y: q0 s
- size: [1, 1],8 A+ M7 K% Q7 p/ T) ^, ~3 N- C
- uvSize: [1, 1]
: w/ k! k6 q! W. e - }/ N7 k: p+ n% T4 N1 q7 }6 v ]. {
- }
$ `/ S& ~) a+ z! D - let f = new Face(info);8 y9 s$ V, }, ^, d9 l# z
- state.f = f;& h9 ~0 R6 L$ o6 U' k1 a/ `
7 J4 e3 F0 ^& T: b2 }5 b% ]- n6 w- let t = f.texture;7 y* |2 y ?9 w7 j% E. b
- let g = t.graphics;) L+ p4 A1 R# X G
- state.running = true;4 B+ A5 Z' e# V5 c5 m2 P x
- let fps = 24;
4 e8 ?* e# j! u H1 I - da(g);//绘制底图0 K% Y% G! m+ h( w# F* F
- t.upload();5 d' ]. A3 R7 ~+ `
- let k = 0;$ v+ ]( @' R% F
- let ti = Date.now();
5 \. S5 O: a6 Z! c - let rt = 0;
; w* i9 R4 q3 g7 [* l) Z3 M. f" Q - smooth = (k, v) => {// 平滑变化" G: n9 T. O* F; S
- if (v > k) return k;
/ J( o) K& _! L" x! D1 L/ A1 l - if (k < 0) return 0;
5 ?" U- G. H2 ` - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
' K4 ?6 L; p" c9 h6 C1 u4 ~ - }, v3 I; u+ J4 Y; s
- run = () => {// 新线程
: r7 K8 R) z/ m1 n, S - let id = Thread.currentThread().getId();0 a7 ]% T6 s, x8 `4 c+ x
- print("Thread start:" + id);! E5 f- C5 s" F9 e$ [
- while (state.running) {8 N2 }+ [. ^/ M9 \
- try {
$ j8 F' e( B, J: @* i8 m/ | - k += (Date.now() - ti) / 1000 * 0.2; p+ [( |# v( l* |
- ti = Date.now();
0 h4 Q, N3 U1 a, N) ]( x% n4 I - if (k > 1.5) {% F# {9 Q/ P+ [! N6 [* P+ e. |) M" y
- k = 0;
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- setComp(g, 1);/ ?( h1 `4 m" n! n% [
- da(g);
) L( u" T2 n) a+ d. i; H ` - let kk = smooth(1, k);//平滑切换透明度+ }4 y1 E" l8 {0 q% O4 o$ r
- setComp(g, kk);$ o# `: D, c. p5 r. v( i [( Y+ i
- db(g);0 l* @5 W$ F9 h! f# T Y% t) f7 z
- t.upload();9 k3 H! a( ~* ~" j. K: m/ `: `- ^
- ctx.setDebugInfo("rt" ,Date.now() - ti);
& ?# z) \$ ]* b; U* j- n - ctx.setDebugInfo("k", k);
+ f/ {8 R/ v x' @ n9 y - ctx.setDebugInfo("sm", kk);
# q' P" |+ I% r. M; Y, m! b+ O - rt = Date.now() - ti;
+ P. E$ a# J' N0 F+ M - Thread.sleep(ck(rt - 1000 / fps));" l2 m; l3 \; w; Q( Y: v
- ctx.setDebugInfo("error", 0)
* S; U* t2 x7 @- a - } catch (e) {
5 y3 m0 z4 n' F4 Q; `4 d - ctx.setDebugInfo("error", e);4 T. I- ~5 k2 f; B! u
- }
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- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");& S& t# O1 W; D* r0 @: C& s
- th.start();
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& W+ s+ E$ K0 M8 @) q% ^" i, h- function render(ctx, state, entity) {( I& P0 s! P# Q( Q9 t- h
- state.f.tick();
. N& D2 G j* E: {1 K, | - }/ M- d% F J8 E5 I( B1 S: ]
. S' l8 X1 X5 x" J, c: r- function dispose(ctx, state, entity) {
6 Q" Z7 t* d, o$ R - print("Dispose");9 Q- ?4 d+ y) X$ K
- state.running = false;( x* t% _4 {8 W( E' |" O8 _
- state.f.close();
# N/ l9 O+ `2 J0 D - }
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- function setComp(g, value) {
* M. N) z* K% s - g.setComposite(AlphaComposite.SrcOver.derive(value));* X O0 c8 Q9 A
- }
复制代码 4 T6 H$ G x w
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。# I/ Y7 C! x( k, f) \& L! P& v+ J
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, t7 f' e$ W) `: p. Y/ C顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)) Q2 Y9 f( n) ?4 J8 C
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