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; o* Q6 H3 Q; Z( G. b' H6 q! f- B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。, V+ C! p% S9 | E3 Q2 w( U
- importPackage (java.lang);
s# O& _$ L& v) o6 [0 i - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);! n, b e/ c" i& {; P k/ L
- ( J, U- c- I3 z9 P0 k! _
- function getW(str, font) {
) o& g9 f/ q3 v) u9 Q- d - let frc = Resources.getFontRenderContext();
& z6 N" ]2 }, {+ g& r7 f - bounds = font.getStringBounds(str, frc);: b' E: {3 j* l$ K( N/ t* j1 \
- return Math.ceil(bounds.getWidth());! f2 t* m( F0 p4 \/ A: n, v P
- }
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- da = (g) => {//底图绘制
5 Z* {, D+ O( G0 C - g.setColor(Color.BLACK);) O1 S2 o8 x: ?" L( x
- g.fillRect(0, 0, 400, 400);) @6 y1 n! i3 z
- }
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- db = (g) => {//上层绘制
6 k! V; @0 z5 v - g.setColor(Color.WHITE);# n, Y, ]" ^# v- C u
- g.fillRect(0, 0, 400, 400);9 H& J2 h& X1 O! P7 O
- g.setColor(Color.RED);) t& {( ^3 w9 P
- g.setFont(font0);6 b# t( y/ c* c/ y' `$ ]
- let str = "晴纱是男娘";
3 l' h& B7 F Z( a1 G6 H - let ww = 400;9 k, r/ m8 ^: ?& n
- let w = getW(str, font0);
. F- g% j" N* i- h- ?( r0 b% M - g.drawString(str, ww / 2 - w / 2, 200);: p% f5 z d! q7 f- J4 B
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- const mat = new Matrices();* U6 w0 a5 T: ?; A1 Z
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
4 h- S% ~3 K, L - let info = {. X" H2 l7 w5 R, K/ M! @
- ctx: ctx,2 }4 `4 O! g! Q
- isTrain: false,
& w6 v% o# ~% \8 [! j! y - matrices: [mat],
2 M p, O0 M& f$ j2 j0 u6 J* ~ - texture: [400, 400],
" a u" H- k4 V$ o$ O# L2 s% d4 p - model: {2 t/ }. P* @( J
- renderType: "light",) j/ c9 f5 X+ S: B# b
- size: [1, 1],% x! n. b t/ {" E, e: U5 W! B8 p' ^
- uvSize: [1, 1]
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- }
% G& }4 }/ |- _) e9 }9 W# W - let f = new Face(info);: i4 k/ X) ?4 N3 }5 V
- state.f = f;- M5 |, ]7 J' r4 I! C2 d0 Q
- & n& p+ s+ M" M; [' E6 l" J
- let t = f.texture;# z0 i0 o$ {; l
- let g = t.graphics;5 E) h" _ M2 z! o
- state.running = true;
5 M8 R, |/ E H* H - let fps = 24;
4 L9 o, {8 `2 e9 w& Q - da(g);//绘制底图
V* Y# t* v. s- R) l/ z4 n5 Y - t.upload();
* H7 q4 w1 A4 t - let k = 0;
; ^" Y* U; b$ w/ b, g* }) o - let ti = Date.now();
; u1 U# w1 b! e$ \ - let rt = 0;, k6 d4 k0 A7 x- A
- smooth = (k, v) => {// 平滑变化
I1 H! o5 F& I4 |" Y% d/ b5 w - if (v > k) return k;2 x; e2 v6 n" W+ T
- if (k < 0) return 0;6 c: |: _3 S5 s( c, b# s6 \
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
4 n0 \! C- f C - }
# B, Y* X/ S8 l0 m% B4 @ - run = () => {// 新线程' C: t- p5 [( ~, S9 T
- let id = Thread.currentThread().getId();
5 q8 q! `; ?3 Q3 o) y% [$ A - print("Thread start:" + id);& H: H2 X: p' C* p* W2 l
- while (state.running) {: L0 b: b" X* ^
- try {! `* B9 O7 V9 n1 ?: T4 i
- k += (Date.now() - ti) / 1000 * 0.2;+ H8 _" ?0 Y5 r( f5 S* ~, q. w
- ti = Date.now();
0 E! R: }0 r% j: y o( q- m - if (k > 1.5) {
- l3 E# T ^- u. }# f - k = 0;* ]3 [8 b* u1 D$ {4 V5 D9 T
- }4 V1 Q, Y8 ]: x5 b
- setComp(g, 1);1 m$ |- k. ?; ?
- da(g);
* P) S6 L S9 I: \ - let kk = smooth(1, k);//平滑切换透明度
/ `- }/ G7 l6 p; F1 j/ m8 \ - setComp(g, kk);
% K! c" x; v" _ - db(g);/ b3 V% s1 u" z) I2 \4 H! ]8 K( K
- t.upload();, G) V& J U4 j& c
- ctx.setDebugInfo("rt" ,Date.now() - ti);8 W. }' u. r( n
- ctx.setDebugInfo("k", k);0 W/ e/ J: D6 X9 q
- ctx.setDebugInfo("sm", kk);8 B2 u' k2 Y8 w+ C
- rt = Date.now() - ti;
# Z: k6 i! E: [, x - Thread.sleep(ck(rt - 1000 / fps));
5 Z" O. F7 o% n3 n$ Y - ctx.setDebugInfo("error", 0)" A6 W6 N6 }; d
- } catch (e) {
/ @9 Q v6 [5 ^6 `, D; S# ? - ctx.setDebugInfo("error", e);$ `1 \ u1 l/ ^8 _; L* B8 T
- }9 w8 f$ v' ^6 k H% C
- }# ~ U, b9 z, i' u) `, ]
- print("Thread end:" + id);
- z# Q- s- v9 y6 d& K - }
) C# H6 A( ^# t - let th = new Thread(run, "qiehuan");
# Z: m9 O, U- w* V; F - th.start();+ Y3 s' ~6 H7 q- o
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- * U4 Z5 J2 n$ X5 x
- function render(ctx, state, entity) {
^' J2 G' u0 J+ j; ] - state.f.tick();
; r; I& y! H" ^/ ^8 B% l& N+ L2 k - }
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- function dispose(ctx, state, entity) {
) ^% o& e3 m8 H - print("Dispose");% X6 m0 S7 z8 u! F. x# p' O
- state.running = false;
, p7 _: i. t% d4 o+ o) { - state.f.close();
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1 K/ D" s# [- |, E- function setComp(g, value) {
. l; i0 x2 ?0 z% S+ s9 [' g) p - g.setComposite(AlphaComposite.SrcOver.derive(value));- R) n# E, f/ o; k- D: N
- }
复制代码 0 t8 ^$ C! {9 E' [$ i8 \* \
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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p9 w8 M7 h9 q( n `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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