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" v* s/ w: y/ ]0 |' q# s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。6 U `" j( p+ V/ u' H
- importPackage (java.lang);
5 f7 m9 G$ t( {$ G! O - importPackage (java.awt);9 d! L. c O1 h
2 W5 K9 ?+ ^ l. p9 q1 a- include(Resources.id("mtrsteamloco:library/code/face.js"));& H2 Z) ~- u3 n3 I. }& `/ }- ]
/ ` G! U3 g' }7 A- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);! T2 k. R& s7 _( \$ C
- ' @5 `, _& K- B6 G# S
- function getW(str, font) {3 ]3 [ P; a- l: p: _/ A7 d! ~" `
- let frc = Resources.getFontRenderContext();; @; K' G$ ?. }/ [4 o0 u
- bounds = font.getStringBounds(str, frc);* b1 P' n9 _. ^1 V
- return Math.ceil(bounds.getWidth());! m! B+ u/ K n
- }
8 O' Z6 E. T. p3 E
T/ Z/ Q4 a: e; _! Y; {# L- da = (g) => {//底图绘制# y5 ~1 N3 J( X7 }& e# d8 `) [
- g.setColor(Color.BLACK);
9 g7 z# d3 |; L K- W; M% s - g.fillRect(0, 0, 400, 400);- g [& {6 [1 P- C
- }
! K6 X" l2 p# B- B' O2 b, W - * q% v6 c k2 B0 _$ Q
- db = (g) => {//上层绘制0 @5 m/ X t$ Z% k1 g M+ z8 }; `8 _
- g.setColor(Color.WHITE);
- |, s! E/ a$ F" `3 p i% [ - g.fillRect(0, 0, 400, 400);
% S6 E5 H$ w P/ w - g.setColor(Color.RED);
. h- y1 i1 @ | - g.setFont(font0);8 T, Z/ C$ ] k" W. v* M: }
- let str = "晴纱是男娘";* o+ W1 H8 Z( ]& U; j
- let ww = 400;
6 P; ?3 b, b. @, L( \: d. W( ^ - let w = getW(str, font0);
; p; X( s) ^" {. n! ~ - g.drawString(str, ww / 2 - w / 2, 200);6 M% }, y1 }) e% g
- }
+ e* C/ _' I ]" z. m) @- ^ - ; f: V% F1 [+ `
- const mat = new Matrices();
5 G0 f w5 q, s* s) ?8 o1 X - mat.translate(0, 0.5, 0);
0 n5 i0 q6 `% Q
: ]7 F( p- `! ?# M$ ^7 k+ l- function create(ctx, state, entity) {
* n A0 }; \4 @$ }5 x$ K- W - let info = {+ k: x9 q. H/ q4 S. }. m5 N3 _
- ctx: ctx,
7 Y1 S5 V9 U, y3 G ?5 E - isTrain: false,; W- K* x. R6 @. y! ?0 R$ K
- matrices: [mat],
! r) f9 M9 }3 R% K4 a& c - texture: [400, 400],
v; {# d5 @+ J4 ? - model: {9 _- P# R: K8 c+ s; Z
- renderType: "light",
! x1 T. [ ~8 T1 r+ X - size: [1, 1],( N+ d" D2 q) C/ y$ d3 h! Q4 a
- uvSize: [1, 1]/ A, T1 f- F1 s! v( P9 K
- }
0 w. @4 j* ~+ V* } f2 L* c8 Y - }
: Q' N: U' l' O7 O# [% S - let f = new Face(info);! L+ @3 t% a( G8 U( B( P- M* N
- state.f = f;
9 C7 h0 T$ ~ f2 {/ A
/ _8 y' p2 ^9 w. c. H* E7 [7 u- let t = f.texture;! C: ~) b9 A0 x# E
- let g = t.graphics;; h# u* ]6 x$ x4 g
- state.running = true;
/ i6 b' m7 o9 F% Y- n - let fps = 24;2 w* _- ]1 }$ n# t1 F
- da(g);//绘制底图
* x) ~0 T3 W* d' e6 R - t.upload();0 ]$ x- g8 t7 x" [) L3 c. A
- let k = 0;0 }6 z" u. |. e; O
- let ti = Date.now();
$ U) k( c8 n9 |, c - let rt = 0;
p" P0 c( D3 d) A3 {, L5 F' g - smooth = (k, v) => {// 平滑变化" _( x' T. P$ w6 G6 K
- if (v > k) return k;
7 @- m1 E- a0 ~; u - if (k < 0) return 0;% |8 c- F# [' R
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;1 j/ O* G( R- U/ y% D
- }
! }+ X7 w) \+ @3 |1 N& l - run = () => {// 新线程: O+ l8 @4 ]4 E d1 E# f$ o. r
- let id = Thread.currentThread().getId();0 Y! W3 [0 j4 g' A/ m! z) T
- print("Thread start:" + id);( v/ s5 J! H5 H( P! \# k! V$ X2 N* {- ]
- while (state.running) {$ I6 V9 d& `' {8 V& [# f
- try {
+ S# v Q+ b0 [ m - k += (Date.now() - ti) / 1000 * 0.2;; s$ i0 j+ Q; q: `* {
- ti = Date.now();
; m' R; b! L4 j/ I: L - if (k > 1.5) {
0 i9 n( F9 X* _ C - k = 0;: G( o$ n' }* d3 p
- }; x E- W# I- v) ~/ y/ S# j
- setComp(g, 1);
" k7 Z5 e( G; z, ]& F; _ - da(g);) h' k4 a+ n3 U X, R) m/ r
- let kk = smooth(1, k);//平滑切换透明度
: e1 s5 R3 P' Q# T& j& B3 @ - setComp(g, kk);
, {5 z" J1 [/ q E - db(g);/ @$ [" U/ ]) H, w/ o/ p" ~
- t.upload();5 } \3 {3 q0 g g( H
- ctx.setDebugInfo("rt" ,Date.now() - ti);2 R& l- L: _2 [3 s/ S9 n8 F+ y( O
- ctx.setDebugInfo("k", k);' k! H& U( H4 ?9 Y+ n+ \$ E0 }
- ctx.setDebugInfo("sm", kk);! ^7 z+ `$ S% B3 M; B
- rt = Date.now() - ti;
3 Z! [3 F- ^6 }* B& l2 {; P - Thread.sleep(ck(rt - 1000 / fps));
( L8 E* T6 l/ p6 R - ctx.setDebugInfo("error", 0)
! E" I$ _$ J, M# P# s - } catch (e) {
# q7 ?2 q7 y4 {/ a0 D; ]+ g - ctx.setDebugInfo("error", e);" ?, m7 a( r5 q8 k8 Z
- }- a- p9 S+ r w' i' q( E
- }6 a+ ^( ?8 d+ |, W; Z6 {/ x# ~2 p
- print("Thread end:" + id);
4 ~ U& \1 a$ i" ?6 r/ I - }
: M* T( X$ n u) R) S. U - let th = new Thread(run, "qiehuan");% n# j+ W+ s/ x8 W* r0 ~; c
- th.start();, B( @4 M$ y, p
- }
2 G' O8 j* J( J6 Q
' G! S$ Q- g2 m% W( c$ k5 s- function render(ctx, state, entity) {
* d! [, j4 P2 D- {' z - state.f.tick();9 l! y' w- C' n9 o8 ^% Y" {
- }, l; ^- O; g/ h
( s1 N- V2 d L( ~0 R- function dispose(ctx, state, entity) { U, k% J8 d! p! k5 X3 l; D2 l
- print("Dispose");2 a) n+ I0 X& m3 \5 S" R% @
- state.running = false;
! f) C* `6 J$ s& o* Y" `: Z - state.f.close();
, }5 v) \; [, u0 _* N: i8 [ - }: U" ~' r+ |% B+ Y
5 ~: _5 f: g# o- function setComp(g, value) {: i9 J ]6 {; U' W
- g.setComposite(AlphaComposite.SrcOver.derive(value));
: k5 M6 B% O, ~* h0 J7 o( z - }
复制代码 3 f7 J1 D" A; l8 c
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。: B9 y- \+ |( z" ]) Z+ O
2 o" D& T$ h' C% @1 J# B* N" y3 ^2 z! @/ ^% n* 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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