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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。% A) Q2 c; o0 p
- importPackage (java.lang);
1 n" z% n: ]6 G6 l! T6 | - importPackage (java.awt);4 U2 ? `4 ?* I: J4 V8 R; S
- ' ~/ |8 Y8 u% Y* e
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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; X% X( X) b x8 |' n3 ?- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {# ?. V% ?! B1 v q S* m9 @
- let frc = Resources.getFontRenderContext();: \4 p; _! p7 \0 X, ?+ _
- bounds = font.getStringBounds(str, frc);- m8 x% P, b# E4 Z
- return Math.ceil(bounds.getWidth());5 |$ @$ F, T. Y: Y' d" u% w9 C7 ]# K
- }
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- T0 R& M+ u. g+ ~! ^ u& [5 }1 z- da = (g) => {//底图绘制
U/ b, u- [) f5 ]6 a; w' v - g.setColor(Color.BLACK);
: P ^/ |9 J( r& I2 a. u4 D n5 o - g.fillRect(0, 0, 400, 400);
6 t' j" A: H2 E& _, b; Z, X6 O - }
5 L" v- r; }- C
6 v9 D6 v8 f8 o. {- db = (g) => {//上层绘制* S, ]/ q9 Z6 ?0 d' u
- g.setColor(Color.WHITE);: [) ~7 a- d- i
- g.fillRect(0, 0, 400, 400);
, g2 O; q6 a. [1 _# M: Y - g.setColor(Color.RED);4 \9 w! I; n. A8 f% y$ Y
- g.setFont(font0);
) D. J+ n* ]9 C/ u3 i - let str = "晴纱是男娘";
: ]9 v) [4 c( Q# Z: P! _% F - let ww = 400;
. e7 L# G4 D4 N7 I1 r' H - let w = getW(str, font0);
2 {5 R% c- ^+ w) ^7 ~ - g.drawString(str, ww / 2 - w / 2, 200);
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- 5 z7 [+ @% A* c* I1 d3 U9 a5 B3 ?" ~0 K
- const mat = new Matrices();1 ~# V! r6 `" Q2 @& d& O; a2 @8 `
- mat.translate(0, 0.5, 0);
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1 M1 T2 g) E! f8 ^! O; }2 U9 F- function create(ctx, state, entity) {, w5 u* w+ }2 ^' Z1 i1 M
- let info = {
! c6 V" F9 I0 [ - ctx: ctx," Q3 R4 N, @$ M( Q. w2 |3 q
- isTrain: false,
) c1 h3 x' G3 k5 E) I( h7 I) A - matrices: [mat],* N- b3 d, V- |0 O4 p& N
- texture: [400, 400],
: D$ C+ C, w0 y: l1 ?$ Z2 S - model: {: [/ q8 J( H- \4 }& l3 e
- renderType: "light",
, L8 e9 X2 S$ J P% X - size: [1, 1],
: P8 J- c/ r8 ^( V4 q/ R6 o - uvSize: [1, 1]4 Z! P: m% Z3 L7 O8 [
- }
! x! _" u2 d+ S9 O. Q9 [7 g! S - }
1 u5 Y# G* Z0 `8 K# A+ C. e) o+ @5 \ - let f = new Face(info);9 q* y' v6 n8 A, {5 z+ Q
- state.f = f;
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0 ]- n1 u9 V2 w+ d/ M- let t = f.texture;4 F% L1 {4 k7 i" [& o) c
- let g = t.graphics;$ p7 M* u1 [/ m
- state.running = true;
. P* O# ~* \+ Z- b; t - let fps = 24;
/ t' g' \$ q! p - da(g);//绘制底图
* L' Q# U+ m& O8 |8 b - t.upload();- Q6 S" m: {0 a- z$ r
- let k = 0;
" T+ w! F* S0 ^ A' i E1 g9 D - let ti = Date.now();6 z& V9 h+ [% S& p
- let rt = 0;
: ]$ N x; t1 ~+ ^ - smooth = (k, v) => {// 平滑变化
/ c5 B [8 Y( j8 E& I- r5 Y - if (v > k) return k;9 o' z) g- L7 ]5 g1 Z% y
- if (k < 0) return 0;
- b) v. F% \5 X7 F) g - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
: T9 s" ?8 D+ B& J, F3 H - }
; W4 u( `; K s) z/ W - run = () => {// 新线程: g9 R0 A4 s, ? `; n" [
- let id = Thread.currentThread().getId();! z# i2 v+ |! u, ^0 V* G
- print("Thread start:" + id);
/ D8 T, `: `6 U' y L - while (state.running) {
1 Y M. I% t: W% w7 g3 R; g - try {4 O9 T- `1 n7 E* @* \9 p2 ?+ N
- k += (Date.now() - ti) / 1000 * 0.2;3 B' v4 i. K# N9 t" D* O w) H
- ti = Date.now();: K) L% r' U) j! W
- if (k > 1.5) {$ o/ a& j9 Z/ c9 B9 D" ?
- k = 0;
\8 U+ L' P6 s% s1 `5 h# U - }
& T/ K3 N* i! b. M" z* V - setComp(g, 1);- Z- z/ L( K# e( Y4 _ @, Q0 x
- da(g);
. q% i% p' `8 b% x1 B" P& T9 |7 z1 [, x - let kk = smooth(1, k);//平滑切换透明度
9 t% K O- r6 _3 e' K7 I2 J1 c - setComp(g, kk);6 \! z" H; `% R
- db(g);2 c; _% |7 E, T B' Z& l3 i& E [
- t.upload();$ e8 [7 J0 l2 c4 @6 Q* S. b
- ctx.setDebugInfo("rt" ,Date.now() - ti);5 b" l' b/ g, r R" ~
- ctx.setDebugInfo("k", k);, n% {. b5 e' [6 Y1 f
- ctx.setDebugInfo("sm", kk);3 T8 J( y: Q. w" ?! D
- rt = Date.now() - ti;: }4 l6 f* ~1 e- n* U5 x H
- Thread.sleep(ck(rt - 1000 / fps));
% d* g/ U/ X! z) A7 _0 D - ctx.setDebugInfo("error", 0)0 \& a7 {3 M6 \3 W& L. E- R7 ]$ z$ q
- } catch (e) {
0 A; y! W# x6 @9 K2 ~ ? - ctx.setDebugInfo("error", e);
7 Y. m$ r3 M P6 M - }
# ^9 J" `' Q5 t1 [- d$ b - }
8 E/ E9 l( S5 P0 E3 D1 H - print("Thread end:" + id); I9 o- i% @+ H/ J
- }8 e5 [" l2 d; ]9 h6 [4 e- q
- let th = new Thread(run, "qiehuan");
- Q5 F* J' j' l0 d7 p8 t# B - th.start();
+ S: \' P) q4 V' _9 P - }
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- function render(ctx, state, entity) {
) V$ \3 i/ R& h" G& U$ |* H6 B& P2 { - state.f.tick();
9 l! ?8 C% P) B9 N - }
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* \# j0 O2 |4 x4 @- function dispose(ctx, state, entity) {
1 t% L, C, \+ m4 S* P* {3 t& ? - print("Dispose");
+ f* ? S1 W7 R* b% c3 K2 ^# F - state.running = false;$ g+ t1 G4 p9 `+ ] x, m
- state.f.close();
5 Z! X9 F+ k7 D - }
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, y- J V v2 O: B5 O c, V- function setComp(g, value) {
2 b9 i# P0 S: F- t1 D* f o - g.setComposite(AlphaComposite.SrcOver.derive(value));0 I* P' `, v* G$ [5 @/ w5 \
- }
复制代码 ' ]0 q$ `+ `. {) Q' h- w8 A% t
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。# q! p" ]2 P1 N) D% p
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2 S, T0 i( j% Q. I" \. @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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