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- y& `& C7 [5 }/ S3 h2 F+ V; j$ Y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。
/ _- \/ _9 m5 @$ X1 Q ~- importPackage (java.lang);
) P# N( M( r% M1 y7 S8 K - importPackage (java.awt);5 e4 }) \$ h/ q
- " M9 W' h# o; D8 j1 Q5 w( t
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);5 \7 L! m2 L; T0 Y% _9 L
+ q3 D6 r7 ?0 |+ ^- function getW(str, font) {
. K3 z0 |4 m9 U2 ? - let frc = Resources.getFontRenderContext();+ X. O5 @2 A* l! ]* n- ^
- bounds = font.getStringBounds(str, frc);
^: V" ]# i. h6 | J( H - return Math.ceil(bounds.getWidth());8 r; z+ Z. c; e: l) \' m
- }
3 B U" _3 a. r9 p# k
' a9 k9 U5 T V" b: l3 l) a" `9 u- da = (g) => {//底图绘制
$ ?* w; d& |5 C$ c2 O* l- a - g.setColor(Color.BLACK);5 d. I3 X# i: |# p& V
- g.fillRect(0, 0, 400, 400);. h1 [: z; z( |
- }
0 i/ H& {8 P! F$ t - * f( W- d! M( e! W2 r
- db = (g) => {//上层绘制
: n& Q# T7 i. q - g.setColor(Color.WHITE);+ ~2 R _5 Z0 j+ r1 U/ L+ o
- g.fillRect(0, 0, 400, 400);( N, F* \9 @4 k
- g.setColor(Color.RED);) E a. f1 }2 d& ~- [) j8 A- X7 V' g9 C
- g.setFont(font0);
9 ?) U6 I$ U& g: W/ e - let str = "晴纱是男娘";6 m# [! f4 d3 ?& P( r, Q2 K
- let ww = 400;" a6 T$ Y8 D3 l' x l
- let w = getW(str, font0);9 X$ r% s7 S+ A! m! C# {4 Y
- g.drawString(str, ww / 2 - w / 2, 200);
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- + d) f" l( N+ v8 v
- const mat = new Matrices();9 a' S) R3 k, h L* D+ U, _1 \
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
9 i. H5 P% T' A0 S$ H7 y B - let info = {1 s; u5 u: Z; J
- ctx: ctx,6 n" [# b2 y9 g
- isTrain: false,
4 x1 u% m# [9 D" s - matrices: [mat],
5 \/ K0 M4 i. ? - texture: [400, 400],7 L- |3 l4 x+ t# \/ A
- model: {& g$ }6 G7 Q4 c* V G* L) Y1 _
- renderType: "light",0 P/ v3 v6 P. ]. c1 s* Q1 M
- size: [1, 1],+ ~% L2 i( L5 ?* r: s* C' r
- uvSize: [1, 1]7 E# |; x' O4 ]& c
- }
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- let f = new Face(info);$ N0 P0 G' E7 X7 Q: m# Z* t1 x( R
- state.f = f;
* `+ Y2 ]$ G- H4 o( G, J( j
F" t2 }1 r/ u- let t = f.texture;
, d+ L/ t7 X1 }' ~, T, A - let g = t.graphics;7 v) p0 B) h1 _% Y, u
- state.running = true;/ d, L2 d# p9 C$ P7 i' B1 `
- let fps = 24;' T( _* `2 I/ W
- da(g);//绘制底图% |7 N5 X g! {9 e2 s
- t.upload();
6 P/ i9 Z' ~) u- h( W4 w' B - let k = 0;% N! ]7 E, E$ ]. F0 {" M
- let ti = Date.now();
" V; e4 Y# b% s5 [" D8 W6 q0 L - let rt = 0;
2 q$ d) ]6 T1 D# o+ ] - smooth = (k, v) => {// 平滑变化6 k9 ^& p) l m* {% G [
- if (v > k) return k;# z, u } {0 p I: | c( I* V
- if (k < 0) return 0;1 \8 N: l4 T: V
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;& S- J; x; @8 q* p) R2 @' V
- }
8 n; T3 x- J7 b; @1 Z @7 Z - run = () => {// 新线程' z3 s* M4 w9 q) `
- let id = Thread.currentThread().getId();# v* l: M( I1 z* l1 I
- print("Thread start:" + id);" r; e+ o- D: H
- while (state.running) {
: G+ a2 L+ b5 x - try {8 L) f1 z$ c. H; ]) L( n/ F+ ^" H
- k += (Date.now() - ti) / 1000 * 0.2;6 H( B5 H" x& }6 [4 o: c
- ti = Date.now();. Q' `/ j) \4 w+ b# N
- if (k > 1.5) {
7 s9 x7 R8 h3 E7 e" a' ^5 Z - k = 0;
/ q% k7 s, A" @5 s9 H! u - }
8 I* |4 J, @( N1 W5 } - setComp(g, 1);
3 J- f( F+ n J4 i3 y# g% o - da(g);+ E$ M3 k7 i/ k* X' @5 ^ c
- let kk = smooth(1, k);//平滑切换透明度$ T2 ?. l, K! Q* w. u
- setComp(g, kk);
3 }* f; C: B' |* u; H - db(g);' P# n1 Q$ C- n, u9 h6 N( `) q) V
- t.upload();
" \9 C) Y4 r0 r - ctx.setDebugInfo("rt" ,Date.now() - ti);
2 P3 A3 f$ K+ p3 k" L3 ]8 r4 l - ctx.setDebugInfo("k", k);
, X4 J; Z1 ], Q9 O - ctx.setDebugInfo("sm", kk);# H2 I* Q& H8 ^/ C
- rt = Date.now() - ti;3 G+ ~6 F8 w F- x. w9 ~
- Thread.sleep(ck(rt - 1000 / fps));6 D5 P* O: C" L/ y* h, L' k( r
- ctx.setDebugInfo("error", 0)
1 G3 N/ c! _& U. c9 I2 K - } catch (e) {
" v5 F. {& ?; ?4 H6 T9 p# c - ctx.setDebugInfo("error", e);* |) F/ B: U! |4 F; l6 i
- }
' a6 E! R. b& P% { - }0 x# Q/ X! |5 i% Q7 K
- print("Thread end:" + id);! q% D4 `+ }, H8 b& y& B
- }+ ? P; y* J' Y9 Y
- let th = new Thread(run, "qiehuan");% q2 b& G% g+ P( V' L% ]1 \7 r
- th.start();
8 N o+ x8 t( A1 b - }, ?' T( | c8 F/ F, _* Z: t
+ G! o n3 ?9 S8 g- function render(ctx, state, entity) {/ }4 u# f, B# ?8 |7 h/ ~
- state.f.tick();
7 P) d; Y6 c# x# g# V; r - }/ M8 G# y; |- v: U
- : n* P) ~9 |' e" {* A1 J
- function dispose(ctx, state, entity) {
- g2 m8 [% e1 G* ?0 F3 c1 h# c) c/ ^ - print("Dispose");( y% l, Q# I" A4 m
- state.running = false;
6 i1 o. J0 S! B# \ - state.f.close();
4 V' C, z8 @' M$ W) H+ f( g1 K' F - }
+ v) N# i+ D& m; A# h% R
! i. P3 s' S" h$ e1 R- function setComp(g, value) {1 ~. @( s6 m1 a" w' n
- g.setComposite(AlphaComposite.SrcOver.derive(value));* W1 m7 r' g- k: ?) I/ l! e- N
- }
复制代码
! ? _2 k, _4 y" l' o+ _: z3 s5 B; @: i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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. G' G- |# C. R6 ^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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