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( i% ]& a. q. |, R7 x, S5 b3 G. E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。
& c) P- A( j9 {% Z" c8 b! h- importPackage (java.lang);
/ {) U5 s. y7 t3 _4 P% [- A/ r - importPackage (java.awt);! K, T8 g/ h, Q$ A; b
- & B2 T0 ?3 X: O- T
- include(Resources.id("mtrsteamloco:library/code/face.js"));" |2 S0 ~' ?8 ]
& d6 k) ^( ] S: a" l- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
+ W' l: O5 H1 K+ l# R8 ^) b: f) r
7 q0 n- k2 O; w" I# t9 y- function getW(str, font) {
1 A7 h8 U* G! I4 f5 [9 s1 x - let frc = Resources.getFontRenderContext();- M* u" f6 I( H$ Z0 |
- bounds = font.getStringBounds(str, frc);
7 v6 Q# Q, r: l7 ]" d" i - return Math.ceil(bounds.getWidth());
( m* x- `2 F% a9 b; T - }
5 A% X" B' T9 M# k% c7 U
( D$ \+ k, @6 @7 \8 ], X. |- da = (g) => {//底图绘制
, l6 F- H" t( |# j - g.setColor(Color.BLACK);7 s; r( n7 |) v
- g.fillRect(0, 0, 400, 400);' w _) [: I! P9 j! N9 m
- }
1 y* {& y( S8 ~ - # Q9 l8 _! l" s: U
- db = (g) => {//上层绘制
& X) r/ g2 j: v5 A) m' ~& _ - g.setColor(Color.WHITE);
' c. u/ k: {5 P& s0 ` - g.fillRect(0, 0, 400, 400);
! K( Y0 p2 N! d/ B' H4 h& z - g.setColor(Color.RED);
: r( P6 b0 R% x/ h" o- C* X* n, e; u7 U: ] - g.setFont(font0);! [! a0 l- n D
- let str = "晴纱是男娘";
+ O( Q/ d( h- t5 G - let ww = 400;
5 {4 ]4 V: `/ g& G$ m - let w = getW(str, font0);
3 x0 l T0 O( e5 n - g.drawString(str, ww / 2 - w / 2, 200);6 r7 [! b z4 O! |1 ^+ r
- }8 y2 y( A+ V8 ~# i) g
- ; n. I: |9 E( M' v$ J
- const mat = new Matrices();
: E% w. t+ k7 Y% F - mat.translate(0, 0.5, 0);. z0 W b1 j: g) s# E, ?5 b
5 q* H$ V5 D; [ Z9 K- function create(ctx, state, entity) {
3 h$ B) |! v2 ?. W - let info = {) F, p* z9 l7 v4 ~7 b9 N3 f7 L7 m
- ctx: ctx,2 S' |' {9 M: y3 D+ q, M, W5 a
- isTrain: false,, F- L+ f3 g- t+ W6 a3 w& R2 Q8 f/ n: c
- matrices: [mat],
. X7 W/ F& k% y9 j: a! p - texture: [400, 400],
. R" |0 f1 Z! h' Q: F9 {: K8 ? - model: {
j2 K$ s/ i: @- i, Q( y - renderType: "light",, \) U9 d) Z1 |3 n0 c' b
- size: [1, 1],
, s0 R; W+ _- J. a3 E7 \ - uvSize: [1, 1]
" C+ k/ l* _2 }5 g& I9 R6 B - }
0 {8 h5 \8 `, w9 o6 N7 p k - }7 V' i2 A5 w6 X7 S" [
- let f = new Face(info);& V( i( t. w' q6 L; B
- state.f = f;
" l7 C$ p6 C. n* U, x1 x - ! R) z( y% K- r1 e6 u5 F
- let t = f.texture;
! g9 i, q6 g5 y& C$ \1 s f - let g = t.graphics;
1 K ^- e& c$ ~% x. L3 b - state.running = true;1 ?) G7 p, G7 P& G0 T
- let fps = 24;
; R* { U. j. }) P3 v - da(g);//绘制底图
4 _- X5 j+ H% p/ Z - t.upload();
6 s+ }0 @. i+ I. A' e - let k = 0;
- F( u5 _$ M# x/ H+ g4 V! [2 \ - let ti = Date.now();' @2 s6 d6 f: K) x L' f5 H1 `; }5 X
- let rt = 0;
- Z/ ~$ A% C( q5 F - smooth = (k, v) => {// 平滑变化
3 |' F. y. S: S2 ]( f - if (v > k) return k;
: d3 n4 [; F- ]( ]! q$ ~$ H - if (k < 0) return 0;4 n u0 O9 U% w5 R# s3 i; L& ]% \
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
& M6 j- r) e+ f/ \5 e* l% w - }: z3 }5 G8 F3 x, v
- run = () => {// 新线程4 X+ x+ g1 g( L. ?8 {
- let id = Thread.currentThread().getId();/ X1 h; [* e& K' J$ T1 i
- print("Thread start:" + id);$ q: k+ Z* g% a) r9 z6 A% p
- while (state.running) {" j" N5 b2 b6 Q4 _
- try {
( m F0 [; P1 h1 c8 d% @ - k += (Date.now() - ti) / 1000 * 0.2;
$ X! Y4 s- h/ d0 _ - ti = Date.now();
! E7 d- Q# U/ D5 K: y7 g6 Z - if (k > 1.5) {
" O& I0 s+ p! A - k = 0;5 ^' h$ Z/ i; s. f3 q6 Q- B. S! l
- }3 Z& g" B" U! x2 A
- setComp(g, 1);9 D" R; {) z8 x! @
- da(g);% M) y6 D1 |( }4 k9 U9 \
- let kk = smooth(1, k);//平滑切换透明度
V8 }! p) M V3 } - setComp(g, kk);# @" o9 P' H) Z# |6 m3 F! r& X
- db(g);' P( T4 @1 `* l, Z: j
- t.upload();! O+ z. K- i( m1 \) v
- ctx.setDebugInfo("rt" ,Date.now() - ti);( w2 v8 I U5 H! E1 l. T( Y$ [
- ctx.setDebugInfo("k", k);/ M6 c: q B( D0 d0 l9 t0 b! T
- ctx.setDebugInfo("sm", kk);
% u$ g# S( R2 k- k - rt = Date.now() - ti;
4 l2 w. z0 F0 L7 b9 m. d' v7 }8 [ - Thread.sleep(ck(rt - 1000 / fps));
4 n! m7 P& b4 ?+ g) s8 @( o - ctx.setDebugInfo("error", 0)
$ m0 Y4 n( k: \4 }; J/ V, h3 H# F - } catch (e) {; }; K! b% F% c9 {9 z
- ctx.setDebugInfo("error", e);1 V1 D; k& `0 X% d& D. p
- }* B: ?) ^- A* v3 ] [
- }
3 j6 x6 t" y1 F$ \7 ]9 W - print("Thread end:" + id);
' D2 c( E; d9 _ - }. x8 d/ F/ u G f+ Y* w m
- let th = new Thread(run, "qiehuan");
" F. |: `4 l/ n( n7 L - th.start();5 E! v! E0 r8 o7 Q
- }
% C# z1 u4 c7 {2 u, t! k# p2 X
, t- Z. [' {4 S4 K- function render(ctx, state, entity) {
/ k, U. I' q7 U* F( ^ - state.f.tick();
; @/ v5 G. G4 a - }
2 ]+ W$ \" P3 F$ l8 e. E6 F8 n - 6 h8 m! Y' S) _+ ?, l6 J/ f7 e
- function dispose(ctx, state, entity) {& I8 a g3 D8 w! b. n& {
- print("Dispose");' Z$ z, J% v; f
- state.running = false;; s: E4 s. r/ r& O: z% X2 N0 m
- state.f.close();
; ?" F6 z$ @: [0 S0 r5 { - }
7 q8 n7 a, v H' \4 N2 r' s - ) L3 \: b8 R5 y1 ^: J- W1 }
- function setComp(g, value) {. g+ \4 k5 r) }
- g.setComposite(AlphaComposite.SrcOver.derive(value));6 S2 t+ m. a/ ?) z. y
- }
复制代码 3 l( y7 o5 K {' I5 ^
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。
9 |1 m6 A0 A7 q, `, o, Q; h/ a- H2 `- x4 J! z& |8 S
- R2 x0 l& x% J" C: a3 |+ 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)
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