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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。
2 V5 P* ?% X! g( e' @0 D( r5 \- importPackage (java.lang);
+ u# `" M: G0 E; U - importPackage (java.awt);
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* P% t6 H( `! U- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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/ K/ Q8 `- x+ y& S- function getW(str, font) {* ^+ h3 I& z3 m/ Y. ^" g* ]3 x
- let frc = Resources.getFontRenderContext();
0 n4 h& ~9 B* `& ^. T/ P - bounds = font.getStringBounds(str, frc);2 i7 a' J0 E4 e9 }8 \3 n
- return Math.ceil(bounds.getWidth());( b# A) [) K1 N D- N5 j
- }6 ` b6 }3 J( a% P1 B* v
, k+ @/ d' ?& H! c- da = (g) => {//底图绘制
7 j C$ U" O# L) Q! w - g.setColor(Color.BLACK);( R. N. ^6 }. n5 C- G b
- g.fillRect(0, 0, 400, 400);
" S5 j% |% n% a B& [, @( v6 W - }2 \7 U+ Q! }4 J7 F: M9 r4 G H
- u1 \' s/ z$ H5 n5 L5 H* [' X- db = (g) => {//上层绘制5 z0 K, n$ _, Q$ Z) I3 V; J( ~
- g.setColor(Color.WHITE);, h' Q& X2 B) [% W* O1 F; e. [
- g.fillRect(0, 0, 400, 400);) [! o/ Q# b* H! s
- g.setColor(Color.RED);3 Q$ t6 ~; v3 @( @
- g.setFont(font0);
- ] U" _; \0 q+ R# \ - let str = "晴纱是男娘";
* f7 z7 C( D M! y' K. B - let ww = 400;% [, N, g9 s" d
- let w = getW(str, font0);6 h" a7 g! `' d
- g.drawString(str, ww / 2 - w / 2, 200);
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- const mat = new Matrices();6 ]9 [) [9 Q' ^6 z9 \+ T
- mat.translate(0, 0.5, 0);2 F( W& K7 p% W( p% g$ k7 E! A
- - i$ M% w6 q' F: \) k9 d
- function create(ctx, state, entity) {
C4 S4 M) x/ p. `& G! x - let info = {) C; [' t8 B3 G: ?% o+ l8 K
- ctx: ctx,
4 p7 F! F7 X! K5 o! S - isTrain: false,
5 V% D8 g. g- h' i, } X& ]* m - matrices: [mat],4 K g+ @0 W# G: b3 W
- texture: [400, 400],
! B) N- w. u) X8 U% K - model: {" m6 f7 C& v% V/ g" s
- renderType: "light",( v7 Q+ o: s: L2 ^9 N @
- size: [1, 1],3 n- r+ Y% W$ Q0 Z" ]
- uvSize: [1, 1] |% q: L# R6 Q5 j2 [/ N! L
- }
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- let f = new Face(info);
3 u6 Q5 n) c* ?8 v# e) K) J- t& R - state.f = f;
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- let t = f.texture;
5 R/ }1 ^9 |$ o. c - let g = t.graphics;
5 J3 v0 ]8 S! { - state.running = true;
4 I2 S% u& u) H% N, X1 I - let fps = 24;
6 {- A4 i5 ~' ` - da(g);//绘制底图
$ }9 n8 n2 G0 b9 x - t.upload();
% o: g4 J* e9 ]. H8 n - let k = 0;
4 `9 g+ R7 v7 N& G+ H - let ti = Date.now();
: P8 K0 s. d. p: @5 o y - let rt = 0;
* \+ i7 D! j0 }, p6 B - smooth = (k, v) => {// 平滑变化
) Q( \( G. O1 D9 d+ p - if (v > k) return k;
. T0 T3 C7 {2 ?! { - if (k < 0) return 0;
' d Z5 U8 H2 b3 p# k4 q0 l! m: H# ` - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
: y( F8 h0 i5 }6 ? - }
" a9 }8 @9 f5 N3 t; d& | @* [ - run = () => {// 新线程" _ f1 D; _, p% [ P
- let id = Thread.currentThread().getId();& m/ F2 e) M) ^% x
- print("Thread start:" + id);* y/ J# T- Y2 F* _
- while (state.running) {5 r4 O; r$ m8 A% h2 ~- Y
- try {
1 {7 Q( f9 ^5 g! O/ C& m - k += (Date.now() - ti) / 1000 * 0.2;
8 q" B+ W/ ^! ^$ e ~ - ti = Date.now();( v# f% k" {+ k; L0 a+ ^
- if (k > 1.5) {
: C0 h. q6 R0 B& N$ X" q - k = 0;* z- } _2 n; V! B
- }, k: [8 L1 c2 x' Q) v( w
- setComp(g, 1);
, K/ h' c$ s* r6 ^/ d - da(g);
# W0 R ^% g& n7 L9 p+ O - let kk = smooth(1, k);//平滑切换透明度* g# W- o/ ?4 m$ [; @8 S: H
- setComp(g, kk);; J( @" N: u4 X0 ~: o2 J4 U2 `
- db(g);
9 ]! f4 d1 n4 q% W; y6 l - t.upload();& j$ D+ O: K7 f* \( D
- ctx.setDebugInfo("rt" ,Date.now() - ti);
0 a* A& E7 r: T" `& G7 \ - ctx.setDebugInfo("k", k);4 J5 W" Z7 Y! r7 ~: C
- ctx.setDebugInfo("sm", kk);
: @5 f; m2 n" ?9 n, X z& r8 i3 j. V - rt = Date.now() - ti;7 ^6 g5 ]* e z6 b, y
- Thread.sleep(ck(rt - 1000 / fps));; g# o) j( n- j7 {9 J
- ctx.setDebugInfo("error", 0)/ \! I6 q E% O( I- r
- } catch (e) {
{ S6 n" M" ?- y" @! s1 a - ctx.setDebugInfo("error", e);& M$ i/ f" v' d+ y0 a$ t
- }
/ O" G/ O- a# d% P, \' l) L8 _ - }
2 c( f+ x7 z( R6 ^; o" L% \) v - print("Thread end:" + id);4 k' Z+ P2 q; i+ Y, ^9 b& j
- }8 y3 B0 q" W; c* |6 x( B& T
- let th = new Thread(run, "qiehuan");4 f1 Z$ L" w6 @5 M2 F
- th.start();
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- : B$ s& f" R. r8 X# |
- function render(ctx, state, entity) {
. ]; y7 Z; m3 L( l$ G7 D - state.f.tick();% F& z4 q" a8 H0 k. Y# }* _
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- function dispose(ctx, state, entity) {
7 P9 m8 p) y5 H9 v - print("Dispose");
* {. f* z' X4 i9 }/ Q" K - state.running = false;
: k5 K; T5 Q, [& i% H - state.f.close();6 `4 f' e; ~7 Z; j- B
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- function setComp(g, value) {
0 `# T i! A ?, H - g.setComposite(AlphaComposite.SrcOver.derive(value));3 R# U/ |9 a& ?
- }
复制代码 # Y: n! L* O$ N! M1 R$ 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。9 P: `8 }% `0 c( D6 K
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6 p I: h j! \) {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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