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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。( T# t; ?, o3 _6 a2 d& t: L5 V6 K
- importPackage (java.lang);% A$ m* i. p; e. Z2 y7 W, C* |
- importPackage (java.awt);- ^1 F/ \* `/ q7 l8 U& D
3 D5 w. K, K, ?2 j- include(Resources.id("mtrsteamloco:library/code/face.js"));
9 p8 }; k6 e% {$ g4 i - 7 O7 A2 P( u. C: F$ q
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
* e% o# r( M8 w' r$ h/ y - 8 q7 C# {9 A+ R) R4 G
- function getW(str, font) {
+ z0 V$ i% Z& k8 v- m2 |& g! Y8 T - let frc = Resources.getFontRenderContext();
; Z- P$ v7 ^! h9 I2 W - bounds = font.getStringBounds(str, frc);
6 q6 p8 w4 \8 R" z1 @: O8 p$ k - return Math.ceil(bounds.getWidth());$ B; J; S1 i" {/ t6 y) S% }# ]+ I
- } ]( i F ]/ }7 b; _
* V5 P( a9 n3 N J- da = (g) => {//底图绘制3 J9 m) J3 {( B) G# ~/ Q
- g.setColor(Color.BLACK);
3 e. D; U; e! _( s. Y+ C. r - g.fillRect(0, 0, 400, 400);7 S( r7 U( ~, Y" @5 _2 _# b
- }; v& A0 p0 h* U/ j* ]5 Q
- 9 ]# x7 ^. f O3 W2 l h3 D+ a
- db = (g) => {//上层绘制+ [# M+ D# t3 V3 V+ H R
- g.setColor(Color.WHITE);
( y7 G8 ?' x6 ^$ O. w4 v - g.fillRect(0, 0, 400, 400);
/ {0 C" t8 o% S3 n - g.setColor(Color.RED);
4 W! O9 Z* p; Z - g.setFont(font0);! s$ q) {) I: ~# Y" Z! e/ ^
- let str = "晴纱是男娘";. b! {$ N, Q" P: s
- let ww = 400;
( S# G; D% Y) t+ y* D1 q - let w = getW(str, font0);+ b# q# U" U A& l
- g.drawString(str, ww / 2 - w / 2, 200); \% m6 M. i( b. ?8 t0 Q
- }
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1 j8 q, \. r! V2 ^3 ?6 A1 J" h- const mat = new Matrices();
P W, q' Z3 S; q p! ] - mat.translate(0, 0.5, 0);& u5 Q7 \/ v: r- G, p J# z
6 j( l2 @) n4 z( ?" z9 p6 `; w- function create(ctx, state, entity) {& D5 Z3 G2 i$ Q- m! C
- let info = {
; [+ W/ _# P9 Y" J; Y - ctx: ctx,
' i/ I6 w4 p: [" Y6 V+ N - isTrain: false,
# o/ K8 ]2 g' C+ ~+ J - matrices: [mat],
7 w! ]" S# @" S: n0 A1 F! e# B - texture: [400, 400],& d0 M, _/ F0 K6 X ?3 r1 [/ _
- model: {+ x. l6 f/ r' a* j$ w
- renderType: "light",) i$ g7 P i2 h. v! m
- size: [1, 1],4 Z Z& T4 [3 c9 S$ u
- uvSize: [1, 1]7 x1 o+ I9 n: M# S2 M8 s o
- }
: `+ L, M6 P- l - }
1 z( Y2 u' G9 C - let f = new Face(info); |* V- ]6 p+ y) x4 V, G
- state.f = f;
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- let t = f.texture;
( m. S5 V+ p% j4 r9 }, h9 t9 ~ - let g = t.graphics;+ p2 j- l8 D) i# z
- state.running = true;
! v7 @: _! {; g( B2 o+ G; o* K | - let fps = 24;& e2 A) k3 S% h Z0 N* w2 J0 U- M
- da(g);//绘制底图
, X' F' n- ]/ r% u% k - t.upload();
) b% I( r. ]2 {4 D) y$ I# n - let k = 0;4 @; k; v1 Z* G: F b$ f9 ]! l
- let ti = Date.now();, [6 [1 b& g5 ^
- let rt = 0;9 }9 S5 n4 F6 u4 v) T3 R
- smooth = (k, v) => {// 平滑变化$ J8 r: q- Y5 W
- if (v > k) return k;
9 Z+ n) q3 T- C! w# n - if (k < 0) return 0;
: l. ~! |' }& E/ o2 M5 I - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
8 L. W5 \) V2 c. I) ~& I - }
, P4 b2 e9 K- P& [; l! S3 z6 d - run = () => {// 新线程
# o8 k! x. a, M* C - let id = Thread.currentThread().getId();
3 _3 y" A( b. y4 g - print("Thread start:" + id);* y; o- u# j' m* k- @) I
- while (state.running) {) l0 v; `6 L0 V( e) P; ^$ d1 h/ M
- try {
9 B/ A. \8 I9 I0 m% _ - k += (Date.now() - ti) / 1000 * 0.2;
, f+ T( @/ k: b6 b) w1 o9 _ - ti = Date.now();
$ ? y2 i7 t8 H6 e& v j - if (k > 1.5) {7 Y @7 K# j' w
- k = 0;
. i* s& i @' g* }0 s+ [ - }
1 S+ s! S, L% s; L5 [9 w6 k. n - setComp(g, 1);+ g( i" |- R* X8 k! J9 }. i# z
- da(g);
( W$ h% u) Q7 G# [& {. p. j! L5 [ - let kk = smooth(1, k);//平滑切换透明度8 g( V6 X4 ]9 V7 r& S
- setComp(g, kk);
7 B4 N8 g( l P0 X! Y - db(g);$ U5 R& d( K" B( p9 k) ~
- t.upload();
& J) N; ` a$ w$ a0 l - ctx.setDebugInfo("rt" ,Date.now() - ti);. m2 d7 l1 Q; o6 N4 D% H
- ctx.setDebugInfo("k", k);
& r: t; p: F. L, T; ? - ctx.setDebugInfo("sm", kk);7 }. X4 B6 l# i( r' l
- rt = Date.now() - ti;2 J; w% t3 @* L- y, z
- Thread.sleep(ck(rt - 1000 / fps));9 U; |) @1 |( d) Y0 Z8 n2 J1 {
- ctx.setDebugInfo("error", 0)8 F/ D7 p1 m7 |$ ]
- } catch (e) {
: n7 u: M. B: [, Z( R - ctx.setDebugInfo("error", e);
# S8 L! K5 z. ?* }3 r) n5 H - }
2 J+ @; d4 S& M; B$ V- e$ Z9 n - }
7 k; d% j4 K2 Q& H) ` - print("Thread end:" + id);; y" x0 S8 Z- d9 O( g9 C
- }
$ |, j! }( }5 {2 A/ f, B5 E - let th = new Thread(run, "qiehuan");- r. S$ I! Y! H" x8 j3 X u
- th.start();
. _' G3 a7 v, N/ h6 S - }
9 v( {. \/ F8 g7 {+ L& J0 t; ]
) Y7 t) K3 {. t4 F8 D- function render(ctx, state, entity) {
! d0 ~. d4 {$ C! b, F0 R! q - state.f.tick();
# p, ^% ]( a; }: j - }
% @, A! ?4 M9 Z) S, { - $ |6 }: j5 ]6 P* E
- function dispose(ctx, state, entity) {+ `1 G" _) R1 r: U/ o3 P
- print("Dispose");
/ F/ f; u/ ]( ~8 u0 _ - state.running = false;" k- L- ]) _% z8 j
- state.f.close();9 s8 F0 j/ P8 T- Z' Z, \
- }
2 J0 s0 o& H2 Y6 v% K( a
9 G) @* E% H! D- function setComp(g, value) {8 c8 S- f0 _/ \+ S: p8 C
- g.setComposite(AlphaComposite.SrcOver.derive(value));+ S7 [* p1 ]# h/ ^ C2 l
- }
复制代码 ) L/ B) ] K- H9 ^' q* r
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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1 H% A& b/ B8 G- ^4 w9 r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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