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7 @. T. a y v
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。
: k, R& H6 }" d! u- K& u# W- importPackage (java.lang);) }$ {; w q% s1 [/ t- l$ [
- importPackage (java.awt);5 m1 K! N* J- U# [) v$ a! k- ~
- m6 t! y( @- M1 b5 ^- include(Resources.id("mtrsteamloco:library/code/face.js")); j8 I n5 i( Z2 g2 U
' Q# v1 R; `6 k( Q& k' b3 K( w- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {5 U/ b6 _8 U8 l( A9 J% S7 z( h
- let frc = Resources.getFontRenderContext();
# e# K0 x G( X8 J5 [3 D( R0 v$ A - bounds = font.getStringBounds(str, frc);
7 c, J0 H6 J' ?% n1 o; ]9 q - return Math.ceil(bounds.getWidth());
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- ' [, }$ d. v1 L1 [7 D
- da = (g) => {//底图绘制0 |. p& S* S7 I& o- l
- g.setColor(Color.BLACK);) J: [6 J Q! V5 c4 Q
- g.fillRect(0, 0, 400, 400);
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1 S8 a; x% p7 ]7 r- db = (g) => {//上层绘制' B7 @1 e9 i" d7 J6 n+ d& M; V
- g.setColor(Color.WHITE);# g& c$ E0 A7 t$ I3 r5 n! U
- g.fillRect(0, 0, 400, 400);6 X7 Q9 I, S/ C; t' q* m9 S
- g.setColor(Color.RED);, Y- @' o* F( o# P; U
- g.setFont(font0);
" i# _3 a, l# }3 a+ q/ x1 P - let str = "晴纱是男娘";+ `" d: l0 B1 {. Y" ?
- let ww = 400;6 { V' ~. n' q( ?6 j
- let w = getW(str, font0);8 V/ d$ { E+ r }, v
- g.drawString(str, ww / 2 - w / 2, 200);
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- $ D" ]9 W1 ]; h( i y- ^' v8 m! |5 z
- const mat = new Matrices();
7 H) x2 y9 W1 ?5 Z G- f - mat.translate(0, 0.5, 0);- I) o3 I* H% I2 L" }, E/ _
) ], O3 F9 j$ G; h! Q$ ^0 G+ c- function create(ctx, state, entity) {
2 c6 ]+ }' C" V( a: j* \ - let info = {, Z: f" B" b U) V
- ctx: ctx,
9 W+ f- w( S; w; R- ?+ C( L S/ B - isTrain: false,
1 U* y- h4 z2 |0 D$ M* | - matrices: [mat]," ]2 k7 E: M9 ~
- texture: [400, 400],, o1 L5 j* c6 q. D7 I& z
- model: {% ?' c' Q; ~, ?3 j9 e2 ~$ Y% k
- renderType: "light",% G& c( R- k6 X4 Y9 g" O
- size: [1, 1],
' F4 s: U8 `. I! o- @+ s - uvSize: [1, 1]4 R& @; b! y+ p: Y
- }
: Y' O, G: Z' g3 H* i - }
& q6 _! X$ g# ?5 u. S# ?' i - let f = new Face(info);3 D) Y9 r5 t+ o5 N
- state.f = f;
. X5 ]+ Q. E! a2 c7 V( c" {$ g: e
6 H6 q& `8 `6 _4 {0 e6 y" B- let t = f.texture;
- H- {+ T- Z# D& A7 L - let g = t.graphics;
1 B7 R! K6 i3 Y( ~6 E - state.running = true;
: R F$ p. S& h - let fps = 24;! f- j( Q, {& Q8 M
- da(g);//绘制底图2 G/ Y0 o8 m4 k |) |/ z8 h
- t.upload(); ^' `& Q. ]% V* X
- let k = 0;- t$ e$ ?& t( L. C3 t
- let ti = Date.now();
% ~# Q1 v' a. j |5 \ - let rt = 0;
6 A) s3 p8 C2 e( c - smooth = (k, v) => {// 平滑变化
1 n% c( O N& C9 l - if (v > k) return k;
2 [' {: i: w( A4 }! O6 R3 A& r - if (k < 0) return 0;
# S+ Z! X2 W; {% z8 c - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;# T1 A8 F9 y3 L" F# R# f. b. M: E) Q
- }- O( O3 f& r' A
- run = () => {// 新线程1 n; q% b3 R0 o
- let id = Thread.currentThread().getId();
1 L2 Y5 y& t7 b! f$ z - print("Thread start:" + id);* n% V6 U2 z+ g9 I3 N8 m, z; _
- while (state.running) {
( w# ~0 [4 e c9 L' C/ P - try {
. c; e6 s! }; o# D+ s. }% W - k += (Date.now() - ti) / 1000 * 0.2;
6 i' a2 {# L+ {% X2 U - ti = Date.now();
6 X( r8 K" j; g/ V0 H. z ?" R; M - if (k > 1.5) {
5 j: b3 ?4 a4 P# i3 D) M8 e# m - k = 0;- u/ p" V: s1 j5 V- [
- }5 T7 l& d8 Z9 @/ w$ ?
- setComp(g, 1);% m8 u: m4 J4 `/ f$ z+ Q# R/ h
- da(g);3 W* V, t$ T. k. a3 V4 v A
- let kk = smooth(1, k);//平滑切换透明度
`4 G& d! |2 O; }& d+ V( @! [ - setComp(g, kk);
+ E5 }+ d P* ?/ w: D - db(g);; K+ H7 g: Y0 _; _' h! i- c; u+ E
- t.upload();& M+ _& i9 J) ]$ ~
- ctx.setDebugInfo("rt" ,Date.now() - ti);' y2 A7 ~9 h9 c' G4 E7 K: H1 P! Q
- ctx.setDebugInfo("k", k);
6 ]6 s$ C7 ^0 w0 ?) W& G ?2 K - ctx.setDebugInfo("sm", kk);' W2 y0 r( e$ c1 p6 A! o
- rt = Date.now() - ti;- D) _4 g" R& F6 o5 S0 D0 e
- Thread.sleep(ck(rt - 1000 / fps));
! L( x9 b* U2 Y) [6 n - ctx.setDebugInfo("error", 0)
. V; D' ^" o' B - } catch (e) {
8 x; r, w L; d8 \7 N8 g. M - ctx.setDebugInfo("error", e);/ W& j* f- h1 }- }7 B( X6 u
- }
# n+ b8 S, b$ B( g. u+ C D \ - }0 c3 _; L: ]- ~7 c) {
- print("Thread end:" + id);# l' g4 ?9 e9 v m
- }
; p3 I- w1 E. l0 m0 v- u - let th = new Thread(run, "qiehuan");! D T; |0 _" O# g* ]; b- F+ z: M; i! D
- th.start();6 ?/ @" t# W1 [( y2 a5 d1 E: z, M
- }
, m+ A: h; ^: t
, m; G- K4 _3 K9 h. l. }- function render(ctx, state, entity) {1 w! u8 g! m8 @# p" v4 z
- state.f.tick();
[; m$ K+ J8 Q6 k% x! a* } - }
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- function dispose(ctx, state, entity) {. a4 l0 R1 J- d, N1 Y
- print("Dispose");9 }! ~8 q- F; A' U4 Q$ ?; M( T
- state.running = false;
( ^" E# d, m) J# e# b) L - state.f.close();- Z! R* W' [4 o. \% b
- }6 j) x3 _1 a) i8 N) \2 r& c' `
- 8 t4 G' ~ V; k$ _& r: Y3 ^4 L
- function setComp(g, value) {' j( T" f. N9 p* L# Q0 |) c1 _7 ~3 f
- g.setComposite(AlphaComposite.SrcOver.derive(value));
6 b w; \% z! `# b3 w# u; I4 ?" n - }
复制代码
6 i- e. }8 Y3 t& j+ s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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5 @) H2 K: Y% q! W- J) a7 T4 G顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)8 Y" U" s2 j9 H: b- s* x! `
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